Medical stereoscopic imaging device, medical stereoscopic imaging system, and medical image processing device

Abstract

To achieve miniaturization while enabling imaging of both normal light, which includes at least a portion of the visible light wavelength range, and two types of fluorescence. [Solution] The medical stereoscopic observation imaging device comprises a first imaging unit 51 that images a first normal observation light LWR and a first fluorescence LF1, respectively, and a second imaging unit 52 that images a second normal observation light LWL and a second fluorescence LF2, respectively. The first and second normal observation lights LWR and LWL are reflected light from an observation target irradiated with normal light including at least a part of the visible light wavelength band, and are observation lights that have parallax with respect to each other. The first and second fluorescence LF1 and LF2 are fluorescence emitted from the observation target, and have different wavelength bands with respect to each other.

Description

【Technical Field】 【0001】 The present disclosure relates to a medical three-dimensional observation imaging device, a medical three-dimensional observation system, and a medical image processing device. 【Background Art】 【0002】 Conventionally, there has been known a medical three-dimensional observation system that irradiates an observation target (a subject such as a person) with light from a light source device and captures the light returning from the observation target to enable three-dimensional observation of the observation target (see, for example, Patent Document 1). 【0003】 The medical three-dimensional observation system described in Patent Document 1 includes right and left eye imaging units that respectively capture right and left eye observation lights having parallax with each other. The right eye observation light includes the light returning from the observation target irradiated with normal light including at least a part of the wavelength band of visible light (hereinafter referred to as the returning light of normal light) and fluorescence emitted from substances contained in the observation target by irradiation with excitation light which is narrow-band light. Then, the right eye imaging unit includes two imaging elements: an imaging element that captures the returning light of normal light and an imaging element that captures fluorescence. Note that the left eye observation light and the left eye imaging unit are also the same as the above-described right eye observation light and the right eye imaging unit. That is, the left eye imaging unit also includes two imaging elements, similar to the right eye imaging unit. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2021-145873 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 Incidentally, there is a need to observe not only one type of fluorescence, but also fluorescence in two different wavelength bands. The medical observation system described in Patent Document 1 can observe one type of fluorescence, but it cannot observe fluorescence in two different wavelength bands (hereinafter referred to as the first and second fluorescence). 【0006】 Here, when observing the reflected light of normal light (hereinafter referred to as normal light observation), observing the first fluorescence (hereinafter referred to as first fluorescence observation), and observing the second fluorescence (hereinafter referred to as second fluorescence observation), it is necessary to achieve the performance of both the first fluorescence observation and the second fluorescence observation. The weaker the fluorescence, the more difficult this becomes. For example, it is necessary to avoid situations where the reflected light of normal light in normal light observation interferes with the first and second fluorescence observations, where the first excitation light for emitting the first fluorescence interferes with the second fluorescence observation, and where the second excitation light for emitting the second fluorescence interferes with the first fluorescence observation. To achieve this, it is necessary to improve the wavelength separation of the light. 【0007】 To improve the separation of light wavelengths, a configuration is envisioned that includes dedicated optical systems for the first and second fluorescence observations, as well as three image sensors: one for capturing the reflected light, one for capturing the first fluorescence, and one for capturing the second fluorescence. However, in the case of a medical stereoscopic observation system that enables stereoscopic viewing of the observed object, the above configuration is required for the right and left eye imaging units, making miniaturization impossible. 【0008】 Therefore, there is a need for a technology that can miniaturize the device while enabling imaging of both the reflected light from normal light and two types of fluorescence. 【0009】 This disclosure has been made in view of the above, and aims to provide a medical stereoscopic imaging device, a medical stereoscopic imaging system, and a medical image processing device that can be miniaturized while enabling imaging of reflected light from normal light and two types of fluorescence. [Means for solving the problem] 【0010】 To solve the above-mentioned problems and achieve the objective, the medical stereoscopic observation imaging device according to this disclosure comprises a first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, and a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, wherein the first normal observation light and the second normal observation light are reflected light from an observation target irradiated with normal light including at least a part of the wavelength band of visible light, and are observation lights having parallax with respect to each other, and the first fluorescence and the second fluorescence are fluorescence emitted from the observation target, and have different wavelength bands with respect to each other. 【0011】 Furthermore, the medical stereoscopic observation system according to this disclosure comprises a medical stereoscopic observation imaging device having a first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, and a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, and a medical image processing device that processes the image obtained by imaging with the medical stereoscopic observation imaging device, wherein the first normal observation light and the second normal observation light are reflected light from an observation target irradiated with normal light including at least a part of the wavelength band of visible light, and are observation lights having parallax with respect to each other, and the first fluorescence and the second fluorescence are fluorescence emitted from the observation target, and have different wavelength bands with respect to each other. 【0012】 Furthermore, the medical image processing device according to this disclosure is a medical image processing device that processes an image obtained by imaging with a medical stereoscopic observation imaging device, wherein the medical stereoscopic observation imaging device comprises a first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, and a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, wherein the first normal observation light and the second normal observation light are reflected light from an observation target irradiated with normal light including at least a part of the wavelength band of visible light, and are observation lights having parallax with respect to each other, and the first fluorescence and the second fluorescence are fluorescence emitted from the observation target, and have different wavelength bands with respect to each other. [Effects of the Invention] 【0013】 The medical stereoscopic imaging device, medical stereoscopic imaging system, and medical image processing device described herein can be miniaturized while enabling imaging of both normal light and two types of fluorescence. [Brief explanation of the drawing] 【0014】 [Figure 1] Figure 1 shows the configuration of a medical stereoscopic observation system 1 according to an embodiment. [Figure 2] Figure 2 is a block diagram showing the configuration of the camera head and control device. [Figure 3] Figure 3 is a diagram illustrating the configuration of the first and second imaging units. [Figure 4] Figure 4 illustrates another example of the configuration of the first and second imaging units. [Figure 5] Figure 5 illustrates another example of the configuration of the first and second imaging units. [Figure 6] Figure 6 illustrates the operation of the first imaging unit and light source device in the first mode. [Figure 7] Figure 7 illustrates the operation of the second imaging unit and light source device in the first mode. [Figure 8] Figure 8 shows the updated image of the captured image generated in the first mode. [Figure 9] Figure 9 illustrates the operation of the first imaging unit and light source device in the second and third modes. [Figure 10] Figure 10 illustrates the operation of the second imaging unit and light source device in the second and third modes. [Figure 11] Figure 11 shows the updated image of the captured image generated in the second and third modes. [Figure 12] Figure 12 illustrates the operation of the first imaging unit and light source device in the fourth mode. [Figure 13]FIG. 13 is a diagram for explaining the operations of the second imaging unit and the light source device in the fourth mode. [Figure 14] FIG. 14 is a diagram showing an updated image of the captured image generated in the fourth mode. [Figure 15] FIG. 15 is a diagram for explaining the configurations of the first and second imaging units in Modification Example 1 of the embodiment. [Figure 16] FIG. 16 is a diagram for explaining the operations of the first imaging unit and the light source device in the third mode. [Figure 17] FIG. 17 is a diagram for explaining the operations of the second imaging unit and the light source device in the third mode. [Figure 18] FIG. 18 is a diagram showing an updated image of the captured image generated in the third mode. [Figure 19] FIG. 19 is a diagram for explaining the operations of the first imaging unit and the light source device in the fourth mode. [Figure 20] FIG. 20 is a diagram for explaining the operations of the second imaging unit and the light source device in the fourth mode. [Figure 21] FIG. 21 is a diagram showing an updated image of the captured image generated in the fourth mode. [Figure 22] FIG. 22 is a diagram for explaining the configurations of the first and second imaging units in Modification Example 2 of the embodiment. [Figure 23] FIG. 第23は、第3のモードにおける第1の撮像部及び光源装置の動作を説明する図である。 [Figure 24] FIG. 2 [Figure 25] FIG. 25 is a diagram showing an updated image of the captured image generated in the third mode. [Figure 26] FIG. 26 is a diagram for explaining the operations of the first imaging unit and the light source device in the fourth mode. [Figure 27] FIG. 27 is a diagram for explaining the operations of the second imaging unit and the light source device in the fourth mode. [Figure 28]Figure 28 shows the updated image of the captured image generated in the fourth mode. [Figure 29] Figure 29 is a diagram illustrating the configuration of the first and second imaging units in a modified example 3 of the embodiment. [Figure 30] Figure 30 illustrates the operation of the first imaging unit and light source device in the third mode. [Figure 31] Figure 31 illustrates the operation of the second imaging unit and light source device in the third mode. [Figure 32] Figure 32 shows the updated image of the captured image generated in the third mode. [Figure 33] Figure 33 illustrates the operation of the first imaging unit and light source device in the fifth mode. [Figure 34] Figure 34 illustrates the operation of the second imaging unit and light source device in the fifth mode. [Figure 35] Figure 35 shows the updated image of the captured image generated in the fifth mode. [Figure 36] Figure 36 is a diagram illustrating the configuration of the first and second imaging units in a modified example 4 of the embodiment. [Figure 37] Figure 37 illustrates the operation of the first imaging unit and light source device in the third mode. [Figure 38] Figure 38 illustrates the operation of the second imaging unit and light source device in the third mode. [Figure 39] Figure 39 shows the updated image of the captured image generated in the third mode. [Figure 40] Figure 40 illustrates the operation of the first imaging unit and light source device in the second mode. [Figure 41] Figure 41 is a diagram illustrating the operation of the second imaging unit and light source device in the second mode. [Figure 42] Figure 42 shows the updated image of the captured image generated in the second mode. [Figure 43]Figure 43 illustrates the operation of the first imaging unit and light source device in the first mode. [Figure 44] Figure 44 illustrates the operation of the second imaging unit and light source device in the first mode. [Figure 45] Figure 45 shows the updated image of the captured image generated in the first mode. [Figure 46] Figure 46 illustrates the operation of the first imaging unit and light source device in the fourth mode. [Figure 47] Figure 47 illustrates the operation of the second imaging unit and light source device in the fourth mode. [Figure 48] Figure 48 shows the updated image of the captured image generated in the fourth mode. [Figure 49] Figure 49 is a diagram illustrating the configuration of the first and second imaging units in a modified example 5 of the embodiment. [Figure 50] Figure 50 is a diagram illustrating the operation of the first imaging unit and light source device in the third mode. [Figure 51] Figure 51 illustrates the operation of the second imaging unit and light source device in the third mode. [Figure 52] Figure 52 shows the updated image of the captured image generated in the third mode. [Figure 53] Figure 53 illustrates a modified example 6 of the embodiment. [Figure 54] Figure 54 illustrates a modified example 6 of the embodiment. [Figure 55] Figure 55 illustrates a modified example 6 of the embodiment. [Figure 56] Figure 56 illustrates a modified example 6 of the embodiment. [Figure 57] Figure 57 illustrates a modified example 6 of the embodiment. [Figure 58] Figure 58 illustrates a modified example 6 of the embodiment. [Figure 59] Figure 59 illustrates a modified example 6 of the embodiment. [Figure 60] Figure 60 illustrates a modified example 6 of the embodiment. [Figure 61] Figure 61 illustrates a modified example 6 of the embodiment. [Figure 62] Figure 62 illustrates a modified example 6 of the embodiment. [Figure 63] Figure 63 illustrates a modified example 6 of the embodiment. [Figure 64] Figure 64 illustrates a modified example 6 of the embodiment. [Figure 65] Figure 65 illustrates a modified example 6 of the embodiment. [Figure 66] Figure 66 illustrates a modified example 6 of the embodiment. [Figure 67] Figure 67 illustrates a modified example 6 of the embodiment. [Figure 68] Figure 68 illustrates a modified example 6 of the embodiment. [Figure 69] Figure 69 illustrates a modified example 6 of the embodiment. [Figure 70] Figure 70 illustrates a modified example 6 of the embodiment. [Figure 71] Figure 71 illustrates a modified example 6 of the embodiment. [Figure 72] Figure 72 illustrates a modified example 6 of the embodiment. [Figure 73] Figure 73 illustrates a modified example 6 of the embodiment. [Figure 74] Figure 74 illustrates a modified example 6 of the embodiment. [Figure 75] Figure 75 illustrates a modified example 6 of the embodiment. [Figure 76] Figure 76 illustrates a modified example 6 of the embodiment. [Figure 77] Figure 77 illustrates a modified example 6 of the embodiment. [Figure 78] Figure 78 illustrates a modified example 6 of the embodiment. [Figure 79]Figure 79 illustrates a modified example 6 of the embodiment. [Figure 80] Figure 80 illustrates a modified example 6 of the embodiment. [Figure 81] Figure 81 is a diagram illustrating a modified example 6 of the embodiment. [Figure 82] Figure 82 illustrates a modified example 7 of the embodiment. [Figure 83] Figure 83 illustrates a modified example of the embodiment, part 8. [Figure 84] Figure 84 illustrates a modified example 9 of the embodiment. [Figure 85] Figure 85 illustrates a modified example 9 of the embodiment. [Modes for carrying out the invention] 【0015】 The embodiments for implementing this disclosure (hereinafter referred to as "embodiments") will be described below with reference to the drawings. However, the embodiments described below do not limit this disclosure. Furthermore, the same parts are denoted by the same reference numerals in the drawings. 【0016】 [Configuration of a medical 3D observation system] Figure 1 shows the configuration of a medical stereoscopic observation system 1 according to an embodiment. In this embodiment, the medical stereoscopic observation system 1 is a medical endoscopic system that uses an endoscope to stereoscopically observe an object (inside the body). As shown in Figure 1, the medical stereoscopic observation system 1 comprises an insertion unit 2, a light source device 3, a light guide 4, a camera head 5, a first transmission cable 6, a display device 7, a second transmission cable 8, a control device 9, and a third transmission cable 10. 【0017】 In this embodiment, the insertion section 2 is composed of a rigid endoscope. That is, the insertion section 2 has an elongated shape that is entirely rigid, or partially flexible with other parts rigid, and is inserted into the object to be observed. Inside the insertion section 2, there is an optical system composed of one or more lenses that collects the reflected light (image of the subject) from the object to be observed. In addition to a general scope (a scope in which a single optical path is set within the scope), the insertion section 2 may also be a binocular relay type or monocular pupil-splitting type scope as described below. 【0018】 In a binocular relay-type scope, two optical paths are arranged in parallel within the scope. Optical systems are also arranged in each of these two optical paths. The binocular relay-type scope then captures and emits observation light for the right and left eyes, each having a parallax between them, using these two optical systems (see, for example, Japanese Patent Publication No. 6-160731). 【0019】 Furthermore, in a monocular pupil-splitting scope, a single optical path is provided within the scope. An optical system is arranged within this single optical path. In addition, a pupil-splitting section is provided at the pupil position of the optical system to divide the light beam within the pupil into two regions. The monocular pupil-splitting scope then captures observation light with the optical system and separates it into observation lights for the right and left eyes, each having a parallax, at the pupil-splitting section before emitting them (see, for example, Japanese Patent Publication No. 6-59199). 【0020】 One end of the light guide 4 is connected to the light source device 3. The light source device 3 comprises a first light source 31 (Figure 1) that supplies normal light (hereinafter referred to as white light) including at least a portion of the visible light wavelength band to one end of the light guide 4 under the control of the control device 9, a second light source 32 (Figure 1) that supplies a first narrow-band excitation light to one end of the light guide 4, a third light source 33 (Figure 1) that supplies a second narrow-band excitation light to one end of the light guide 4, and a fourth light source 34 (Figure 1) that supplies a third narrow-band excitation light to one end of the light guide 4. The first to third excitation lights may be visible light or invisible light. The first to fourth light sources 31 to 34 may be composed of LEDs (Light Emitting Diodes) or semiconductor lasers. Furthermore, the number of first light sources 31 that emit white light may be one or more. Similarly, the number of second light sources 32 that emit the first excitation light may be one or more. Similarly, the number of third light sources 33 that emit the second excitation light may be one or more. Similarly, the number of fourth light sources 34 that emit the third excitation light may be one or more. 【0021】 Examples of substances contained in the object being observed that are excited by the first to third excitation light include drugs or fluorescent dyes applied to the object, or fluorescent substances originating from the object itself. 【0022】 Examples of the above-mentioned drugs applied to the subjects of observation include "5-ALA (PP-IX)", "ADS780WS", "ADS830WS", "aggregation-induced emission dots allophycocyanin (APC)", "boron-dipyrromethane (BODIPY)", "CLR 1502", "Flavins", "fluorescamine", "Fluorescein", "fluoro-gold", "green fluorescence protein", "ICG (indocyanine green)", "IRDye 78", "IR-PEG nanoparticles", "Isothiocyanate", "rose bengal", "SGM-101", and "trypan blue". 【0023】 Furthermore, the fluorescent dyes mentioned above that can be applied to the observed OB include: "coumarine", "Cy3", "DyLight547", "GE3126", "metal nanoclusters", "oxacarbocyanine", "Rhodamine", "Riboflavin", "fluorescein", "AlexaFluor 488", "AlexaFluor660", "AlexaFluor680", "AlexaFluor700", "Cy5", "Cy5.5", "Dy677", "Dy682", "Dy752", "DyLight647", "HiLyte Fluor 647", "HiLyte Fluor 680", "IRDye 700DX", "methylene blue", "Porphyrins", "Porphysomes", "VivoTag-680", "VivoTag-S680", "AlexaFluor750", "AlexaFluor790", "carbocyanine", "conjugated copolymers", "CW800-CA", "Cy7", "Cy7.5", and "cyanine". Examples include "dyes", "Dy780", "HiLyte Fluor 750", "Indocarbocyanine", "IR-786", "IRDye 800CW", "IRDye 800RS", "IRDye 800BK", "Nervelight", "OTL-38 (Pafolacianine)", "Polymethine", "VivoTag-S750", "ASP5354", "Xanthene", and "LUM-015". 【0024】 Furthermore, examples of fluorescent substances derived from the observed object that constitute the observed object itself include "collagen," "elastin," and "NADH." 【0025】 In this embodiment, the light source device 3 is configured separately from the control device 9, but it is not limited to this configuration, and it may also be configured to be housed in the same enclosure as the control device 9. 【0026】 One end of the light guide 4 is detachably connected to the light source device 3. The other end of the light guide 4 is detachably connected to the insertion section 2. The light guide 4 propagates the white light and the first to third excitation lights supplied from the light source device 3 (the first to fourth light sources 31 to 34) from one end to the other, and supplies them to the insertion section 2. The white light and the first to third excitation lights supplied to the insertion section 2 are emitted from the tip of the insertion section 2 and irradiate the object to be observed. The reflected light (object image) of the white light and the first to third excitation lights from the object to be observed is focused by the optical system within the insertion section 2. The reflected white light is the white light reflected from the object to be observed. The reflected light of the first excitation light includes the first excitation light reflected from the object being observed, as well as fluorescence emitted from a substance contained in the object when the first excitation light irradiates the object and excites that substance (hereinafter referred to as the first fluorescence). The reflected light of the second excitation light includes the second excitation light reflected from the object being observed, as well as fluorescence emitted from a substance contained in the object when the second excitation light irradiates the object and excites that substance (hereinafter referred to as the second fluorescence). The reflected light of the third excitation light includes the third excitation light reflected from the object being observed, as well as fluorescence emitted from a substance contained in the object when the third excitation light irradiates the object and excites that substance (hereinafter referred to as the third fluorescence). 【0027】 Here, the first fluorescence and the second and third fluorescence are light with different wavelength bands. The second and third fluorescence are light with similar wavelength bands. Furthermore, the third fluorescence is light with a stronger fluorescence intensity than the second fluorescence. 【0028】 The camera head 5 corresponds to the medical stereoscopic observation imaging device according to this disclosure. The camera head 5 is detachably connected to the base end (eyepiece 21 (Figure 1)) of the insertion section 2. The camera head 5 separates the light focused by the insertion section 2 into observation light for the right eye and observation light for the left eye. Here, the observation light for the right eye includes normal observation light for the right eye (the first normal observation light according to this disclosure) obtained by separating the reflected light of white light, and fluorescence observation light for the right eye obtained by separating the first to third fluoresces. The observation light for the left eye includes normal observation light for the left eye (corresponding to the second normal observation light according to this disclosure) obtained by separating the reflected light of white light, and fluorescence observation light for the left eye obtained by separating the first to third fluoresces. Furthermore, under the control of the control device 9, the camera head 5 images the normal observation light for the right eye, the normal observation light for the left eye, and the first to third fluoresces, respectively, and generates pixel signals. For the sake of explanation, the pixel signals obtained from imaging with normal observation light for the right eye will be referred to as the normal observation image for the right eye (corresponding to the first normal observation image in this disclosure). The pixel signals obtained from imaging with normal observation light for the left eye will be referred to as the normal observation image for the left eye (corresponding to the second normal observation image in this disclosure). Furthermore, the pixel signals obtained from imaging with the first fluorescence will be referred to as the first fluorescence observation image. Furthermore, the pixel signals obtained from imaging with the second fluorescence will be referred to as the second fluorescence observation image. Furthermore, the pixel signals obtained from imaging with the third fluorescence will be referred to as the third fluorescence observation image. In addition, the normal observation image for the right eye, the normal observation image for the left eye, and the first to third fluorescence observation images will be collectively referred to as the "imaging image." The detailed configuration of camera head 5 will be explained later in the section titled "Camera Head Configuration". 【0029】 One end CN1 of the first transmission cable 6 is detachably connected to the control device 9. The other end CN2 of the first transmission cable 6 is detachably connected to the camera head 5. Note that the other end CN2 is not limited to being detachably connected to the camera head 5; it may also be fixed to the camera head 5. The first transmission cable 6 transmits the captured image output from the camera head 5 to the control device 9, and also transmits control signals, synchronization signals, clock signals, and power signals transmitted from the control device 9 to the camera head 5, respectively. 【0030】 Furthermore, the captured images and other data transmitted from the camera head 5 to the control device 9 via the first transmission cable 6 may be transmitted as optical signals or as electrical signals. The same applies to the transmission of control signals, synchronization signals, and clock signals from the control device 9 to the camera head 5 via the first transmission cable 6. 【0031】 The display device 7 is composed of a display display using liquid crystal or organic EL (Electro Luminescence), and under the control of the control device 9, it displays an image based on a video signal from the control device 9. 【0032】 One end of the second transmission cable 8 is detachably connected to the display device 7. The other end of the second transmission cable 8 is detachably connected to the control device 9. The second transmission cable 8 then transmits the video signal processed by the control device 9 to the display device 7. 【0033】 The control unit 9 includes a CPU (Central Processing Unit) and an MPU (Micro Processing Unit), and comprehensively controls the operation of the light source device 3, the camera head 5, and the display device 7. The control unit 9 is not limited to a CPU or MPU; it may also include an ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or GPU (Graphics Processing Unit). The detailed configuration of the control device 9 will be explained later in the section titled "Configuration of the Control Device". 【0034】 One end of the third transmission cable 10 is detachably connected to the light source device 3. The other end of the third transmission cable 10 is detachably connected to the control device 9. The third transmission cable 10 transmits control signals from the control device 9 to the light source device 3. 【0035】 [Camera head configuration] Next, we will explain the configuration of camera head 5. Figure 2 is a block diagram showing the configuration of the camera head 5 and the control device 9. As shown in Figure 2, the camera head 5 comprises first and second imaging units 51 and 52, and a communication unit 53. 【0036】 Figure 3 illustrates the configuration of the first and second imaging units 51 and 52. In Figure 2, the normal observation light for the right eye and the normal observation light for the left eye, which have parallax and are obtained by separating the reflected white light in the camera head 5, are labeled as the normal observation light for the right eye LWR and the normal observation light for the left eye LWL, respectively. Also in Figure 2, the first excitation light is labeled as excitation light LE1 and the first fluorescence as fluorescence LF1. Furthermore, in Figure 2, the second and third excitation lights are collectively labeled as excitation light LE2 and the second and third fluorescence as fluorescence LF2. The first imaging unit 51 captures the normal observation light LWR and the fluorescence LF1 for the right eye, respectively, to generate a normal observation image for the right eye and a first fluorescence observation image, respectively. As shown in Figure 3, this first imaging unit 51 comprises first and second optical members 511 and 512, and first and second image sensors 513 and 514. 【0037】 In this embodiment, the first optical element 511 is composed of a filter that cuts out light in a specific wavelength band. Here, "cut" means partially, substantially, or completely suppressing light. The same meaning applies to "cut" as described below. Note that the first optical element 511 is not limited to a filter; it may be composed of other optical elements as long as they have the function of separating light in a specific wavelength band from light in other wavelength bands. 【0038】 Specifically, as shown in Figure 3, the first optical element 511 has a light-cutting function that cuts out the excitation light LE1, LE2 and fluorescence LF2 contained in the light that is focused at the insertion section 2 and incident on the first optical element 511. The light that is focused at the insertion section 2 and incident on the first optical element 511 is the normal observation light LWR for the right eye, the excitation light LE1, LE2, and the fluorescence LF1, LF2. 【0039】 In this embodiment, the second optical element 512 is composed of a prism that separates light in a specific wavelength band from light in other wavelength bands. However, the second optical element 512 is not limited to a prism; it may be composed of other optical elements as long as they have the function of separating light in a specific wavelength band from light in other wavelength bands. 【0040】 Specifically, as shown in Figure 3, the second optical element 512 has a light separation function that separates the normal observation light LWR for the right eye and the fluorescent LF1 that were not cut off by the first optical element 511. The second optical element 512 then directs the normal observation light LWR for the right eye toward the first image sensor 513 and the fluorescent LF1 toward the second image sensor 514. 【0041】 The first image sensor 513 is an image sensor such as a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) that receives light and converts it into an electrical signal. The first image sensor 513 then captures the normal observation light LWR for the right eye via the second optical element 512 under the control of the control device 9. A normal observation image for the right eye is obtained by this imaging. 【0042】 The second image sensor 514 is an image sensor such as a CCD or CMOS. The second image sensor 514 then images the fluorescent LF1 via the second optical element 512 under the control of the control device 9. A first fluorescence observation image is obtained by this imaging. 【0043】 The second imaging unit 52 captures the left eye's normal observation light LWL and the fluorescence LF2, respectively, to generate a left eye normal observation image and a second or third fluorescence observation image. As shown in Figure 3, the second imaging unit 52 comprises third and fourth optical members 521 and 522, and third and fourth image sensors 523 and 524. 【0044】 In this embodiment, the third optical element 521 is composed of a filter that cuts out light in a specific wavelength band. However, the third optical element 521 is not limited to a filter; it may be composed of other optical elements as long as they have the function of separating light in a specific wavelength band from light in other wavelength bands. 【0045】 Specifically, as shown in Figure 3, the third optical element 521 has a light-cutting function that cuts out the excitation light LE1, LE2 and fluorescence LF1 contained in the light that is focused at the insertion section 2 and incident on the third optical element 521. The light that is focused at the insertion section 2 and incident on the third optical element 521 is the normal observation light LWL for the left eye, the excitation light LE1, LE2, and the fluorescence LF1, LF2. 【0046】 In this embodiment, the fourth optical element 522 is composed of a prism that separates light in a specific wavelength band from light in other wavelength bands. However, the fourth optical element 522 is not limited to a prism; it may be composed of other optical elements as long as they have the function of separating light in a specific wavelength band from light in other wavelength bands. 【0047】 Specifically, as shown in Figure 3, the fourth optical element 522 has a light separation function that separates the left eye normal observation light LWL and the fluorescent LF2 that were not cut off by the third optical element 521. The fourth optical element 522 directs the left eye normal observation light LWL toward the third image sensor 523 and the fluorescent LF2 toward the fourth image sensor 524. 【0048】 The third image sensor 523 is an image sensor such as a CCD or CMOS. The third image sensor 523, under the control of the control device 9, captures the left eye normal observation light LWL via the fourth optical member 522. A normal observation image for the left eye is obtained by this imaging. 【0049】 The fourth image sensor 524 is an image sensor such as a CCD or CMOS. The fourth image sensor 524, under the control of the control device 9, captures the fluorescence LF2 (second fluorescence or third fluorescence) via the fourth optical element 522. This capture yields either a second fluorescence observation image or a third fluorescence observation image. 【0050】 Here, the number of pixels in the normal observation image for the right eye, the number of pixels in the normal observation image for the left eye, the number of pixels in the first fluorescence observation image, and the number of pixels in the second fluorescence observation image may all be different, or at least two or more may have the same number of pixels. 【0051】 Figures 4 and 5 illustrate other examples of the configurations of the first and second imaging units 51 and 52. The configurations of the first and second imaging units 51 and 52 described above are not limited to those shown in Figure 3, but may also be those shown in Figure 4 or Figure 5. In the first imaging unit 51 shown in Figure 4, the light-cutting function of the first optical member 511 and the light-separating function of the second optical member 512 are combined into a single optical member 510. 【0052】 Similarly, in the second imaging unit 52 shown in Figure 4, the light-cutting function of the third optical member 521 and the light-separating function of the fourth optical member 522 are combined into a single optical member 520. 【0053】 In the first imaging unit 51 shown in Figure 5, the first optical member 511 is positioned between the second optical member 512 and the second image sensor 514. The light separation function of the second optical element 512 is to separate the light focused at the insertion section 2 and incident on the second optical element 512 into the normal observation light LWR for the right eye, the excitation lights LE1 and LE2, and the fluorescent lights LF1 and LF2. The second optical element 512 also directs the normal observation light LWR for the right eye toward the first image sensor 513. Furthermore, the second optical element 512 directs the excitation lights LE1 and LE2, and the fluorescent lights LF1 and LF2 toward the first optical element 511. Furthermore, the light-cutting function of the first optical element 511 is to cut out the excitation light LE1, LE2, and fluorescence LF2 contained in the light incident on the first optical element 511. The fluorescence LF1 that is not cut out by the first optical element 511 then propagates toward the second image sensor 514. 【0054】 Similarly, in the second imaging unit 52 shown in Figure 5, the third optical member 521 is positioned between the fourth optical member 522 and the fourth image sensor 524. The light separation function of the fourth optical element 522 is to separate the light focused at the insertion section 2 and incident on the fourth optical element 522 into the normal observation light LWL for the left eye, the excitation lights LE1 and LE2, and the fluorescence lights LF1 and LF2. The fourth optical element 522 also directs the normal observation light LWL for the left eye toward the third image sensor 523. Furthermore, the fourth optical element 522 directs the excitation lights LE1 and LE2 and the fluorescence lights LF1 and LF2 toward the third optical element 521. Furthermore, the light-cutting function of the third optical element 521 is to cut out the excitation light LE1, LE2, and fluorescence LF1 contained in the light incident on the third optical element 521. The fluorescence LF2 that is not cut out by the third optical element 521 then travels toward the fourth image sensor 524. 【0055】 Table 1 below shows the correspondence between the first to fourth image sensors 513, 514, 523, and 524, white light, and the first to third fluorescence. 【0056】 [Table 1] 【0057】 In Table 1, "◎" indicates that 3D (three-dimensional) imaging is possible. That is, a 3D image can be generated from the normal observation image for the right eye generated by the first image sensor 513 and the normal observation image for the left eye generated by the third image sensor 523. Also, "〇" indicates that 2D (two-dimensional) imaging is possible. That is, the first 2D fluorescence observation image can be generated by the second image sensor 514. Furthermore, the second and third 2D fluorescence observation images can be generated by the fourth image sensor 524. Finally, "×" indicates that it is not compatible. 【0058】 The communication unit 53, under the control of the control device 9, performs signal processing on the captured images (analog signals) generated by the first to fourth image sensors 513, 514, 523, and 524, and outputs the captured images (digital signals). The following are examples of signal processing performed by the communications unit 53. For example, the communication unit 53 performs signal processing on the captured images (analog signals) generated by the first to fourth image sensors 513, 514, 523, and 524, including processing to remove reset noise, multiplying by an analog gain to amplify the analog signal, and A / D conversion. 【0059】 The communication unit 53 functions as a transmitter that transmits the captured image, which has undergone the signal processing described above, to the control device 9 via the first transmission cable 6. This communication unit 53 is configured, for example, as a high-speed serial interface that communicates the captured image with the control device 9 via the first transmission cable 6 at a transmission rate of 1 Gbps or more. 【0060】 [Control device configuration] Next, the configuration of the control device 9 will be explained with reference to Figure 2. As shown in Figure 2, the control device 9 comprises a communication unit 91, an image memory 92, a processing module 93, a control unit 94, an input unit 95, an output unit 96, and a storage unit 97. 【0061】 The communication unit 91 functions as a receiver that receives captured images sequentially transmitted from the camera head 5 (communication unit 53) via the first transmission cable 6. This communication unit 91 is configured, for example, with a high-speed serial interface that communicates captured images with the communication unit 53 at a transmission rate of 1 Gbps or more. 【0062】 The image memory 92 is composed of, for example, DRAM (Dynamic Random Access Memory). This image memory 92 can temporarily store multiple frames of captured images that are sequentially output from the camera head 5 (communication unit 53). 【0063】 The processing module 93 corresponds to the medical image processing device according to this disclosure. This processing module 93 processes the captured images that are sequentially transmitted from the camera head 5 (communication unit 53) and received by the communication unit 91 under the control of the control unit 94. As shown in Figure 2, this processing module 93 comprises a memory controller 931, an image processing unit 932, and a display control unit 933. 【0064】 The memory controller 931 controls the writing of captured images to the image memory 92 and the reading of captured images from the image memory 92. The captured images read by the memory controller 931 are input to the image processing unit 932. 【0065】 The image processing unit 932 performs image processing on the input captured image. Examples of such image processing include optical black subtraction (clamping), white balance adjustment, demosaicing, color correction matrix processing, gamma correction, YC processing to convert RGB signals to luminance chrominance signals (Y, Cb / Cr signals), digital gain adjustment to multiply digital gain, noise reduction, and filtering to enhance structure. 【0066】 Furthermore, the image processing performed on the normal observation image for the right eye, the image processing performed on the normal observation image for the left eye, the image processing performed on the first fluorescence observation image, the image processing performed on the second fluorescence observation image, and the image processing performed on the third fluorescence observation image may all be different image processing processes, or at least two or more may be the same image processing process. 【0067】 The display control unit 933 generates a video signal for displaying the captured image after image processing has been performed by the image processing unit 932, under the control of the control unit 94. The display control unit 933 then outputs the video signal to the display device 7 via the second transmission cable 8. 【0068】 The control unit 94 is implemented by a controller such as a CPU or MPU executing various programs stored in the memory unit 97. It controls the operation of the light source device 3, the camera head 5, and the display device 7, as well as the operation of the entire control unit 9. The control unit 94 is not limited to a CPU or MPU; it may also include an ASIC, FPGA, or GPU. The functions of the control unit 94 will be explained later in the section "Operation of the Medical Stereoscopic Observation System". 【0069】 The input unit 95 is configured using operating devices such as a mouse, keyboard, and touch panel, and accepts user operations from a user such as a surgeon. The input unit 95 then outputs an operation signal corresponding to the user operation to the control unit 94. 【0070】 The output unit 96 is configured using a speaker, printer, etc., and outputs various types of information. 【0071】 The memory unit 97 stores programs executed by the control unit 94, information necessary for processing by the control unit 94, and so on. 【0072】 [Operation of the medical 3D observation system] Next, we will explain the operation of the medical stereoscopic observation system 1 described above. The medical stereoscopic observation system 1 is set to one of four modes, for example, in response to user operations on the input unit 95. The medical stereoscopic observation system 1 then performs different operations according to each of the four modes. The following sections will explain the operation corresponding to each of the four modes (1st to 4th). 【0073】 [Operation according to the first mode] The first mode generates a normal observation image for the right eye, a normal observation image for the left eye, and a first fluorescence observation image. The operation of the first imaging unit 51 and light source device 3 in the first mode, the operation of the second imaging unit 52 and light source device 3 in the first mode, and the updated image of the captured image generated in the first mode will be described in order below. 【0074】 [Operation of the first imaging unit and light source device in the first mode] Figure 6 illustrates the operation of the first imaging unit 51 and the light source device 3 in the first mode. Specifically, Figure 6(a) shows the first synchronization signal. For the sake of explanation, the NTSC system will be used in the following description. However, other systems such as the PAL system may also be used. Because the NTSC system is used, the first synchronization signal has a period of 1 / 60 [s] (the period of the frame (field)). Figure 6(b) shows the second synchronization signal, which has half the period of the first synchronization signal. Figure 6(c) shows the imaging control of the first image sensor 513, with the vertical axis showing the horizontal line of the first image sensor 513 (the top row shows the uppermost horizontal line (the first horizontal line), and the bottom row shows the lowermost horizontal line (the final line)), and the horizontal axis showing time. The parallelogram region is the region that contributes to the generation of the normal observation image for the right eye in one frame (field). In Figure 6(c), for the sake of explanation, the words "WLI imaging" are written within the parallelogram region, indicating imaging of the normal observation light LWR (white light) for the right eye. Figure 6(d) is a diagram showing the light source control of the first light source 31, where the vertical axis shows the power value [W] supplied to the first light source 31 and the horizontal axis shows time (the power supply time to the first light source 31). In this embodiment, since the voltage value supplied to the first light source 31 is fixed, in Figure 6(d), the vertical axis corresponds to the current value supplied to the first light source 31. Figure 6(e) is a diagram showing the imaging control of the second image sensor 514, where the vertical axis shows the horizontal line of the second image sensor 514 (the top row shows the uppermost horizontal line (the first horizontal line), and the bottom row shows the lowermost horizontal line (the final line)) and the horizontal axis shows time. The parallelogram region is the area that contributes to the generation of the first fluorescence observation image in one frame (field). In Figure 6(e), for the sake of explanation, the words "Fluorescence 1 Imaging" are written within the parallelogram region, indicating imaging of fluorescence LF1 (first fluorescence). Figure 6(f) is a diagram showing the light source control of the second light source 32, with the vertical axis showing the power value [W] supplied to the second light source 32 and the horizontal axis showing time (the supply time of power supplied to the second light source 32).In this embodiment, since the voltage value supplied to the second light source 32 is fixed, in Figure 6(f), the vertical axis corresponds to the current value supplied to the second light source 32. 【0075】 When set to the first mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 as shown below. As shown in Figure 6(c), the control unit 94 performs imaging control using a so-called rolling shutter method, which involves sequentially starting exposure of the first image sensor 513 for each horizontal line during one field period, and sequentially reading out each horizontal line after a predetermined period (so-called shutter speed) has elapsed since the start of exposure. In the example in Figure 6(c), the first image sensor 513 is set to have a total line exposure period of 1 / 120 [s] and to read out at 1 / 120 [s]. Note that the total line exposure period and readout speed may be set to other values. 【0076】 Furthermore, as shown in Figure 6(d), the control unit 94 supplies power to the first light source 31 at a period of 1 / 120 [s] in accordance with the timing of the second synchronization signal. Here, the power supply time to the first light source 31 is less than 1 / 120 [s]. As a result, the first light source 31 emits white light for a time of less than 1 / 120 [s] at a period of 1 / 120 [s]. Note that in Figure 6(d), for the sake of explanation, the words "WLI light," which means the emission of white light, are written within the rectangular area indicating the power supply status. 【0077】 Furthermore, as shown in Figure 6(e), the control unit 94 performs rolling shutter imaging control for the second image sensor 514, similar to the imaging control for the first image sensor 513. In this case, the timing of reading out each field in the first and second image sensors 513 and 514 is shifted by 1 / 120 [s], as shown in Figure 6(c) and Figure 6(e). Note that the timing of reading out each field may be shifted or may be the same. 【0078】 Furthermore, as shown in Figure 6(f), the control unit 94 continuously supplies power to the second light source 32. As a result, the second light source 32 remains lit and continuously emits the first excitation light. In Figure 6(f), for the sake of explanation, the words "Fluorescence 1 Excitation Light," which signifies the emission of the first excitation light, are written within the rectangular area indicating the power supply status. 【0079】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye and a first fluorescence observation image (fluorescence observation light for the right eye) are generated. 【0080】 [Operation of the second imaging unit and light source device in the first mode] Figure 7 illustrates the operation of the second imaging unit 52 and the light source device 3 in the first mode. Specifically, Figures 7(a) and 7(b) correspond to Figures 6(a) and 6(b), respectively. Figure 7(c) shows the imaging control of the third image sensor 523, with the vertical axis showing the horizontal line of the third image sensor 523 (the top row shows the uppermost horizontal line (the first horizontal line), and the bottom row shows the lowermost horizontal line (the final line)), and the horizontal axis showing time. The parallelogram region is the region that contributes to the generation of the normal observation image for the left eye in one frame (field). In Figure 7(c), for the sake of explanation, the words "WLI imaging," which means imaging of the normal observation light LWL (white light) for the left eye, are written within the parallelogram region. Figure 7(d) corresponds to Figure 6(d). Figure 7(e) shows the imaging control of the fourth image sensor 524. Figure 7(f) shows the light source control of the third and fourth light sources 33 and 34. 【0081】 When set to the first mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 as shown below. As shown in Figure 7(c), the control unit 94 performs rolling shutter imaging control for the third image sensor 523 in the same manner as the imaging control for the first image sensor 513. In this case, the timing of reading out each field in the first and third image sensors 513 and 523 is the same, as shown in Figure 6(c) and Figure 7(c). 【0082】 Based on the operation of the second imaging unit 52 and the light source device 3 described above, a normal observation image for the left eye is generated. 【0083】 [Updated image of the captured image generated in the first mode] Figure 8 shows the updated image of the captured image generated in the first mode. Specifically, Figure 8(a) corresponds to Figure 6(a). Figure 8(b) shows the updated image of the normal observation image for the right eye and the normal observation image for the left eye. In Figure 8(b), for the sake of explanation, the words "WLI" are written within the rectangular area showing the normal observation image for the right eye and the normal observation image for the left eye. Figure 8(c) shows the updated image of the first fluorescence observation image. In Figure 8(c), for the sake of explanation, the words "Fluorescence 1" are written within the rectangular area showing the first fluorescence observation image. As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the first fluorescence observation image (fluorescence observation light for the right eye) are updated every frame (1 / 60 [s] period) by the operation of the first and second imaging units 51 and 52 and the operation of the light source device 3. 【0084】 [Operation according to the second and third modes] The second mode generates a normal observation image for the right eye, a normal observation image for the left eye, and a second fluorescence observation image. The third mode generates a normal observation image for the right eye, a normal observation image for the left eye, and a third fluorescence observation image. In this embodiment, the first and second imaging units 51 and the light source device 3 operate similarly in the second and third modes, respectively. Therefore, the operation corresponding to the second and third modes will be described collectively below. The operation of the first imaging unit 51 and light source device 3 in the second and third modes, the operation of the second imaging unit 52 and light source device 3 in the second and third modes, and the updated image of the captured image generated in the second and third modes will be described in order below. 【0085】 [Operation of the first imaging unit and light source device in the second and third modes] Figure 9 illustrates the operation of the first imaging unit 51 and the light source device 3 in the second and third modes. Specifically, Figures 9(a) to 9(f) correspond to Figures 6(a) to 6(f), respectively. 【0086】 When set to the second or third mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 as shown below. As shown in Figure 9(c), the control unit 94 controls the imaging of the first image sensor 513, similar to when it is set to the first mode. Also, as shown in Figure 9(d), the control unit 94 controls the light source of the first light source 31, similar to when it is set to the first mode. 【0087】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye is generated. 【0088】 [Operation of the second imaging unit and light source device in the second and third modes] Figure 10 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the second and third modes. Specifically, Figures 10(a) to 10(d) correspond to Figures 7(a) to 7(d), respectively. Figure 10(e) corresponds to Figure 7(e), and the vertical axis shows the horizontal line of the fourth image sensor 524 (the top row shows the uppermost horizontal line (the first horizontal line), and the bottom row shows the lowermost horizontal line (the final line)), and the horizontal axis shows time. The parallelogram region represents one frame (field) This region contributes to the generation of the second or third fluorescence observation image. In Figure 10(e), for the sake of explanation, the words "Fluorescence 2 (Fluorescence 3) Imaging" are written within the parallelogram region, signifying imaging of fluorescence LF2 (second or third fluorescence). Figure 10(f) corresponds to Figure 7(f), with the vertical axis showing the power value [W] supplied to the third light source 33 or the fourth light source 34, and the horizontal axis showing time (the power supply time to the third light source 33 or the fourth light source 34). In this embodiment, since the voltage value supplied to the third light source 33 or the fourth light source 34 is fixed, in Figure 10(f), the vertical axis corresponds to the current value supplied to the third light source 33 or the fourth light source 34. 【0089】 When set to the second or third mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 as shown below. As shown in Figure 10(c), the control unit 94 performs imaging control of the third image sensor 523, similar to when it is set to the first mode. 【0090】 Furthermore, as shown in Figure 10(e), the control unit 94 performs rolling shutter imaging control for the fourth image sensor 524, similar to the imaging control for the third image sensor 523. In this case, the timing of the readout of each field in the third and fourth image sensors 523 and 524 is shifted by 1 / 120 [s], as shown in Figures 10(c) and 10(e). Note that the timing of the readout of each field may be shifted, or it may be the same. 【0091】 Furthermore, as shown in Figure 10(f), the control unit 94 continuously supplies power to the third light source 33 or the fourth light source 34. As a result, the third light source 33 or the fourth light source 34 remains lit and continuously emits the second or third excitation light. In Figure 10(f), for the sake of explanation, the words "Fluorescence 2 (Fluorescence 3) Excitation Light" are written within the rectangular area indicating the power supply status, signifying the emission of excitation light LE2 (second or third excitation light). 【0092】 Based on the operation of the second imaging unit 51 and the light source device 3 described above, a normal observation image for the left eye and a second fluorescence observation image (fluorescence observation light for the left eye) or a third fluorescence observation image (fluorescence observation light for the left eye) are generated. 【0093】 [Updated image of the captured image generated in the second and third modes] Figure 11 shows the updated image of the captured image generated in the second and third modes. Specifically, Figure 11(a) corresponds to Figure 8(a). Figure 11(b) corresponds to Figure 8(b). Figure 11(c) shows the updated image of the second or third fluorescence observation image. In Figure 11(c), for the sake of explanation, the words "fluorescence 2 (fluorescence 3) image" are written within the rectangular area representing the second or third fluorescence observation image. As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the second fluorescence observation image (fluorescence observation light for the left eye) or the third fluorescence observation image (fluorescence observation light for the left eye) are updated every frame (1 / 60 [s] period), as shown in Figure 11. 【0094】 [Operation according to the fourth mode] The fourth mode generates a normal observation image for the right eye, a normal observation image for the left eye, a first fluorescence observation image, and a second or third fluorescence observation image. The operation of the first imaging unit 51 and the light source device 3 in the fourth mode, the operation of the second imaging unit 52 and the light source device 3 in the fourth mode, and the updated image of the captured image generated in the fourth mode will be described in order below. 【0095】 [Operation of the first imaging unit and light source device in the fourth mode] Figure 12 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the fourth mode. Specifically, Figures 12(a) to 12(f) correspond to Figures 6(a) to 6(f), respectively. 【0096】 When set to the fourth mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 as shown below. As shown in Figure 12(c), the control unit 94 controls the imaging of the first image sensor 513, similar to when it is set to the first mode. Also, as shown in Figure 12(d), the control unit 94 controls the light source of the first light source 31, similar to when it is set to the first mode. Furthermore, as shown in Figure 12(e), the control unit 94 controls the imaging of the second image sensor 514, similar to when it is set to the first mode. Also, as shown in Figure 12(f), the control unit 94 controls the light source of the second light source 32. 【0097】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye and a first fluorescence observation image (fluorescence observation light for the right eye) are generated. 【0098】 [Operation of the second imaging unit and light source device in the fourth mode] Figure 13 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the fourth mode. Specifically, Figures 13(a) to 13(f) correspond to Figures 10(a) to 10(f), respectively. 【0099】 When set to the fourth mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 as shown below. As shown in Figure 13(c), the control unit 94 performs imaging control of the third image sensor 523, similar to when it is set to the second or third mode. 【0100】 Furthermore, as shown in Figure 13(e), the control unit 94 performs imaging control of the fourth image sensor 524, similar to when it is set to the second or third mode. 【0101】 Furthermore, as shown in Figure 13(f), the imaging unit 94 controls the light source of the third light source 33 or the fourth light source 34, similar to when it is set to the second or third mode. 【0102】 Based on the operation of the second imaging unit 51 and the light source device 3 described above, a normal observation image for the left eye and a second fluorescence observation image (fluorescence observation light for the left eye) or a third fluorescence observation image (fluorescence observation light for the left eye) are generated. 【0103】 [Updated image of the captured image generated in the fourth mode] Figure 14 shows the updated image of the captured image generated in the fourth mode. Specifically, Figures 14(a) to 14(c) correspond to Figures 8(a) to 8(c), respectively. Figure 14(d) corresponds to Figure 11(c). As described above, the normal observation image for the right eye, the normal observation image for the left eye, the first fluorescence observation image (fluorescence observation light for the right eye), and the second fluorescence observation image (fluorescence observation light for the left eye) or the third fluorescence observation image (fluorescence observation light for the left eye) are updated every frame (1 / 60 [s] period), as shown in Figure 14. 【0104】 According to the embodiment described above, the following effects are achieved. The camera head 5 according to this embodiment includes a first imaging unit 51 that images the normal observation light for the right eye and the first fluorescence, and a second imaging unit 52 that images the normal observation light for the left eye and the second and third fluorescence. That is, the first and second imaging units 51 and 52 are not identical in configuration, and the first imaging unit 51 images at least one of two or more types of fluorescence, while the second imaging unit 52 images at least the other of those two or more types of fluorescence. Therefore, the camera head 5 according to this embodiment can be miniaturized while enabling imaging of the reflected light of white light and two or more types of fluorescence. 【0105】 Furthermore, since the image sensors 514 and 524 that image fluorescence are provided separately from the image sensors 513 and 523 that image white light, it is possible to increase the sensitivity of the image sensors 514 and 524 to fluorescence. 【0106】 (Other embodiments) While we have described the forms for implementing this disclosure, this disclosure should not be limited to the embodiments described above. In the above-described embodiment, the following modifications 1 to 9 may also be adopted. 【0107】 (Variation 1) Figure 15 is a diagram corresponding to Figure 3, illustrating the configuration of the first and second imaging units 51 and 52 in the modified example 1 of the above-described embodiment. In this modified example 1, the first to fourth optical members 511, 512, 521, and 522 are configured as shown below. 【0108】 As shown in Figure 15, the first optical member 511 in this modified example 1 has a light-cutting function that cuts out the excitation light LE1 and LE2 contained in the light that is focused at the insertion part 2 and incident on the first optical member 511. The light that is focused at the insertion part 2 and incident on the first optical member 511 is the normal observation light LWR for the right eye, the excitation light LE1 and LE2, and the fluorescence LF1 and LF2. 【0109】 As shown in Figure 15, the second optical member 512 in this modified example 1 has a light separation mechanism that separates the normal observation light LWR for the right eye and the fluorescent LF2 and fluorescent LF1 that were not cut off by the first optical member 511. The second optical member 512 directs the normal observation light LWR for the right eye and the fluorescent LF2 toward the first image sensor 513, and directs the fluorescent LF1 toward the second image sensor 514. 【0110】 As shown in Figure 15, the third optical member 521 according to this modified example 1 has the same function as the third optical member 521 described in the above-described embodiment. 【0111】 As shown in Figure 15, the fourth optical member 522 in this modified example 1 has a light separation function that separates a portion of the fluorescent LF2 that was not cut off by the third optical member 521 and the normal observation light LWL for the left eye from the other fluorescent LF2. The fourth optical member 522 directs a portion of the fluorescent LF2 and the normal observation light LWL for the left eye toward the third image sensor 523, and directs the other fluorescent LF2 toward the fourth image sensor 524. 【0112】 In this modified example 1, the correspondence between the first to fourth image sensors 513, 514, 523, and 524, white light, and the first to third fluorescence is as shown in Table 2 below. 【0113】 [Table 2] 【0114】 In Table 2, "◎" and "(◎)" indicate that 3D imaging is possible. That is, a 3D image can be generated from the normal observation image for the right eye generated by the first image sensor 513 and the normal observation image for the left eye generated by the third image sensor 523. Furthermore, a 3D image can be generated from the third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))) generated by the first image sensor 513 and the third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) generated by the third image sensor 523. Furthermore, a 3D image can be generated from the third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))) generated by the first image sensor 513 and the third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) generated by the fourth image sensor 524. Also, "〇" means that it is possible to capture in 2D (two dimensions). That is, the second image sensor 514 can generate a 2D first fluorescence observation image. Also, the fourth image sensor 524 can generate a 2D second fluorescence observation image. Furthermore, "×" means that it is not supported. 【0115】 The operation corresponding to the first mode in this modified example 1 is the same as the operation corresponding to the first mode described in the embodiment described above. Also, the operation corresponding to the second mode in this modified example 1 is the same as the operation corresponding to the second and third modes described in the embodiment described above. For this reason, the operation corresponding to the third mode and the operation corresponding to the fourth mode in this modified example 1 will be described in order below. 【0116】 [Operation according to the third mode] The operation of the first imaging unit 51 and the light source device 3 in the third mode, the operation of the second imaging unit 52 and the light source device 3 in the third mode, and the updated image of the captured image generated in the third mode will be described in order below. 【0117】 [Operation of the first imaging unit and light source device in the third mode] Figure 16 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the third mode. Specifically, Figures 16(a) to 16(d), 16(f), and 16(g) correspond to Figures 6(a) to 6(f), respectively. In Figure 16(c), for the sake of explanation, the words "Fluorescence 3 Imaging" are written within the parallelogram region that contributes to the generation of the third fluorescence observation image, signifying imaging of the third fluorescence. Figure 16(e) corresponds to Figure 10(f), and the vertical axis shows the power value [W] supplied to the fourth light source 34, while the horizontal axis shows time (the power supply time to the fourth light source 34). In this embodiment, since the voltage value supplied to the fourth light source 34 is fixed, in Figure 16(e), the vertical axis corresponds to the current value supplied to the fourth light source 34. Furthermore, in Figure 16(e), for the sake of explanation, the words "Fluorescence 3 Excitation Light," which signifies the emission of the third excitation light, are written within the rectangular area indicating the power supply status to the fourth light source 34. 【0118】 When set to the third mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 as shown below. As shown in Figure 16(c), the control unit 94 performs imaging control of the first image sensor 513, similar to when it is set to the first mode. 【0119】 Furthermore, as shown in Figures 16(d) and 16(e), the control unit 94 alternately emits white light from the first light source 31 and emits third excitation light from the fourth light source 34 during the entire line exposure period TE1 for each frame (1 / 60 [s] period) of the first image sensor 513. Here, the power supply time to the first light source 31 is less than the entire line exposure period TE1 (1 / 120 [s]). As a result, the first light source 31 emits white light for a time less than the entire line exposure period TE1 (1 / 120 [s]). On the other hand, the power supply time to the third light source 33 is the entire line exposure period TE1. As a result, the third light source 33 emits third excitation light for a time equal to the entire line exposure period TE1 (1 / 120 [s]). Therefore, as shown in Figure 16(c), the first image sensor 513 captures white light and the third fluorescence in a time-division manner for each frame. 【0120】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye and a third fluorescence observation image (first fluorescence observation image for stereoscopic vision (fluorescence observation light for the right eye (first fluorescence observation light))) are generated. 【0121】 [Operation of the second imaging unit and light source device in the third mode] Figure 17 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the third mode. Specifically, Figures 17(a) to 17(e) correspond to Figures 10(a) to 10(e), respectively. Figure 17(f) corresponds to Figure 16(e). 【0122】 When set to the third mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 as shown below. As shown in Figure 17(c), the control unit 94 controls the imaging of the third image sensor 523, similar to when it is set to the first mode. Therefore, the third image sensor 523 captures white light and the third fluorescence in a time-division manner for each frame. Furthermore, as shown in Figure 17(e), the control unit 94 does not operate the fourth image sensor 524 (or even if it were operated, it would not utilize the captured third fluorescence observation image). 【0123】 The operation of the second imaging unit 52 and the light source device 3 described above generates a normal observation image for the left eye and a third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))). 【0124】 [Updated image of the captured image generated in the third mode] Figure 18 shows the updated image of the captured image generated in the third mode. Specifically, Figures 18(a) and 18(b) correspond to Figures 8(a) and 8(b), respectively. Figure 18(c) corresponds to Figure 11(c) and shows the updated image of the third fluorescence observation image. In Figure 18(c), for the sake of explanation, the words "Fluorescence 3" are written within the rectangular area representing the third fluorescence observation image. As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the third fluorescence observation image (fluorescence observation light for the right eye, fluorescence observation light for the left eye) are updated every two frames (1 / 30 [s] period) by the operation of the first and second imaging units 51 and 52 and the operation of the light source device 3, respectively, as shown in Figure 18. 【0125】 [Operation according to the fourth mode] The operation of the first imaging unit 51 and the light source device 3 in the fourth mode, the operation of the second imaging unit 52 and the light source device 3 in the fourth mode, and the updated image of the captured image generated in the fourth mode will be described in order below. 【0126】 [Operation of the first imaging unit and light source device in the fourth mode] Figure 19 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the fourth mode. Specifically, Figures 19(a) to 19(g) correspond to Figures 16(a) to 16(g), respectively. 【0127】 When set to the fourth mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 as shown below. As shown in Figure 19(c), the control unit 94 controls the imaging of the first image sensor 513, similar to when it is set to the third mode. Also, as shown in Figures 19(d) and 19(e), the control unit 94 controls the light sources of the first and third light sources 31 and 33, similar to when it is set to the third mode. As a result, the first image sensor 513 captures white light and the third fluorescence in a time-division manner for each frame, as shown in Figure 19(c). 【0128】 Furthermore, as shown in Figure 19(f), the control unit 94 performs imaging control of the second image sensor 514, similar to when it is set to the first mode. 【0129】 Furthermore, as shown in Figure 19(g), the control unit 94 controls the light source of the second light source 32, similar to when it is set to the first mode. 【0130】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye, a first fluorescence observation image (fluorescence observation light for the right eye), and a third fluorescence observation image (first fluorescence observation image for stereoscopic vision (fluorescence observation light for the right eye (first fluorescence observation light))) are generated. 【0131】 [Operation of the second imaging unit and light source device in the fourth mode] Figure 20 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the fourth mode. Specifically, Figures 20(a) to 20(f) correspond to Figures 17(a) to 17(f), respectively. 【0132】 When set to the fourth mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 in the same way as when set to the third mode, as shown in Figure 20. 【0133】 Based on the operation of the second imaging unit 52 and the light source device 3 described above, a normal observation image for the left eye and a third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) are generated. 【0134】 [Updated image of the captured image generated in the fourth mode] Figure 21 shows the updated image of the captured image generated in the fourth mode. Specifically, Figures 21(a), 21(b), and 21(d) correspond to Figures 18(a) to 18(c), respectively. Figure 21(c) corresponds to Figure 8(c). As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the third fluorescence observation image (fluorescence observation light for the right eye, fluorescence observation light for the left eye) are updated every two frames (1 / 30 [s] period), as shown in Figure 21. In addition, the first fluorescence observation image (fluorescence observation light for the right eye) is updated every one frame (1 / 60 [s] period). 【0135】 Even when configured as in the modified example 1 described above, the same effects as those of the embodiment described above are achieved. 【0136】 (Modification 2) Figure 22 is a diagram corresponding to Figure 3, illustrating the configuration of the first and second imaging units 51 and 52 in a modified example 2 of the above-described embodiment. In this modified example 2, the first to fourth optical members 511, 512, 521, and 522 are configured as shown below. 【0137】 As shown in Figure 22, the first to third optical members 511, 512, and 521 in this modified example 2 have the same functions as the first to third optical members 511, 512, and 521 described in the modified example 1 described above. Furthermore, the fourth optical member 514 in this modified example 2 has the same functions as the fourth optical member 514 described in the embodiment described above. 【0138】 In this modified example 2, the correspondence between the first to fourth image sensors 513, 514, 523, and 524, white light, and the first to third fluorescence is as shown in Table 3 below. 【0139】 [Table 3] 【0140】 In Table 3, "◎" indicates that 3D imaging is possible. That is, a 3D image can be generated from the normal observation image for the right eye generated by the first image sensor 513 and the normal observation image for the left eye generated by the third image sensor 523. Furthermore, a 3D image can be generated from the third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))) generated by the first image sensor 513 and the third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) generated by the fourth image sensor 524. Also, "〇" indicates that 2D (two-dimensional) imaging is possible. That is, a 2D first fluorescence observation image can be generated by the second image sensor 514. Furthermore, a 2D second fluorescence observation image can be generated by the fourth image sensor 524. Finally, "×" indicates that it is not supported. 【0141】 The operation corresponding to the first mode in this modified example 2 is the same as the operation corresponding to the first mode described in the embodiment described above. Also, the operation corresponding to the second mode in this modified example 2 is the same as the operation corresponding to the second and third modes described in the embodiment described above. For this reason, the operation corresponding to the third mode and the operation corresponding to the fourth mode in this modified example 2 will be described in order below. 【0142】 [Operation according to the third mode] The operation of the first imaging unit 51 and the light source device 3 in the third mode, the operation of the second imaging unit 52 and the light source device 3 in the third mode, and the updated image of the captured image generated in the third mode will be described in order below. 【0143】 [Operation of the first imaging unit and light source device in the third mode] Figure 23 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the third mode. Specifically, Figures 23(a) to 23(g) correspond to Figures 16(a) to 16(g), respectively. 【0144】 When set to the third mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 in the same way as when set to the third mode in the modified example 1 described above, as shown in Figure 23. 【0145】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye and a third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))) are generated. 【0146】 [Operation of the second imaging unit and light source device in the third mode] Figure 24 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the third mode. Specifically, Figures 24(a) to 24(f) correspond to Figures 17(a) to 17(f9), respectively. 【0147】 When set to the third mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 as shown below. As shown in Figure 24(c), the control unit 94 controls the imaging of the third image sensor 523, similar to when it is set to the first mode. For this reason, the third image sensor 523 captures white light in a time-division manner for each frame. However, the normal observation image for the left eye captured during the period when the third fluorescence was emitted is not used. 【0148】 Furthermore, as shown in Figure 24(e), the control unit 94 performs imaging control of the fourth image sensor 524, similar to when it is set to the second mode. 【0149】 The operation of the second imaging unit 52 and the light source device 3 described above generates a normal observation image for the left eye and a third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))). 【0150】 [Updated image of the captured image generated in the third mode] Figure 25 shows the updated image of the captured image generated in the third mode. Specifically, Figures 25(a) and 25(b) correspond to Figures 8(a) and 8(b), respectively. Figure 25(c) shows the updated image of the third fluorescence observation image (fluorescence observation light for the right eye). In Figure 25(c), for the sake of explanation, the words "fluorescence 3 strokes right" are written within the rectangular area representing the third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))). Figure 25(d) shows the updated image of the third fluorescence observation image (fluorescence observation light for the left eye). In Figure 25(d), for the sake of explanation, the words "Fluorescence 3rd Stroke Left," which signifies the third fluorescence observation image (second fluorescence observation image for stereoscopic viewing (fluorescence observation light for the left eye (second fluorescence observation light))) are written within the rectangular area showing the third fluorescence observation image (second fluorescence observation image for stereoscopic viewing (fluorescence observation light for the left eye)). As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the third fluorescence observation image (first stereoscopic fluorescence observation image (right eye fluorescence observation light (first fluorescence observation light))) are updated every two frames (1 / 30 [s] period), as shown in Figure 25. The generated third fluorescence observation image (second stereoscopic fluorescence observation image (left eye fluorescence observation light (second fluorescence observation light))) is updated every one frame (1 / 60 [s] period). 【0151】 [Operation according to the fourth mode] The operation of the first imaging unit 51 and the light source device 3 in the fourth mode, the operation of the second imaging unit 52 and the light source device 3 in the fourth mode, and the updated image of the captured image generated in the fourth mode will be described in order below. 【0152】 [Operation of the first imaging unit and light source device in the fourth mode] Figure 26 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the fourth mode. Specifically, Figures 26(a) to 26(g) correspond to Figures 23(a) to 23(f), respectively. 【0153】 When set to the fourth mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 in the same manner as when set to the fourth mode in the modified example 1 described above. 【0154】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye, a first fluorescence observation image (fluorescence observation light for the right eye), and a third fluorescence observation image (first fluorescence observation image for stereoscopic vision (fluorescence observation light for the right eye (first fluorescence observation light))) are generated. 【0155】 [Operation of the second imaging unit and light source device in the fourth mode] Figure 27 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the fourth mode. Specifically, Figures 27(a) to 27(f) correspond to Figures 24(a) to 24(f), respectively. 【0156】 When set to the fourth mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 in the same way as when set to the third mode. 【0157】 The operation of the second imaging unit 52 and the light source device 3 described above generates a normal observation image for the left eye and a third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))). 【0158】 [Updated image of the captured image generated in the fourth mode] Figure 28 shows the updated image of the captured image generated in the fourth mode. Specifically, Figures 28(a), 28(b), 28(d), and 28(e) correspond to Figures 25(a) to 25(d), respectively. Figure 28(c) corresponds to Figure 8(c). As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))) are updated every two frames (1 / 30 [s] period), as shown in Figure 28. In addition, the first fluorescence observation image (fluorescence observation light for the right eye) and the third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) are updated every one frame (1 / 60 [s] period). 【0159】 Even when configured as in the modified example 2 described above, the same effects as those of the embodiment described above are achieved. 【0160】 (Variation 3) Figure 29 is a diagram corresponding to Figure 3, illustrating the configuration of the first and second imaging units 51 and 52 in the modified example 3 of the above-described embodiment. In this modified example 3, the third light source 33 is not provided. Furthermore, the second light source 32 in this modified example 3 emits a fourth excitation light with a different wavelength band from the first to third excitation lights. When the fourth excitation light is irradiated onto the object of observation, the reflected light from the object of observation includes not only the fourth excitation light reflected by the object of observation, but also fluorescence emitted from a substance contained in the object of observation due to the excitation of that substance (hereinafter referred to as the fourth fluorescence). Here, the fourth fluorescence is light with a different wavelength band from the first to third fluorescence. Note that in Figure 29, the fourth excitation light is referred to as excitation light LE4 and the fourth fluorescence as fluorescence LF4. This fourth fluorescence corresponds to the first fluorescence in this disclosure. 【0161】 In the first imaging unit 51 of this modified example 3, the second image sensor 514 described in the above-described embodiment is not provided. Also, in the second imaging unit 52 of this modified example 3, the fourth image sensor 524 described in the above-described embodiment is not provided. Furthermore, in this modified example 3, the first to fourth optical members 511, 512, 521, and 522 are configured as shown below. 【0162】 As shown in Figure 29, the first optical member 511 in this modified example 3 has a light-cutting function that cuts out the excitation light LE2, LE4 and fluorescence LF4 contained in the light that is focused at the insertion part 2 and incident on the first optical member 511. The light that is focused at the insertion part 2 and incident on the first optical member 511 is the normal observation light LWR for the right eye, the excitation light LE2, LE4, and the fluorescence LF2, LF4. 【0163】 As shown in Figure 29, the second optical member 512 in this modified example 3 has the function of directing the normal observation light LWR for the right eye and the fluorescent LF2 that were not cut off by the first optical member 511 toward the first image sensor 513. 【0164】 As shown in Figure 29, the third optical member 521 in this modified example 3 has a light-cutting function that cuts out the excitation light LE2, LE4 and fluorescence LF2 contained in the light that is focused at the insertion part 2 and incident on the third optical member 521. The light that is focused at the insertion part 2 and incident on the third optical member 513 is the normal observation light LWL for the left eye, the excitation light LE2, LE4, and the fluorescence LF2, LF4. 【0165】 As shown in Figure 29, the fourth optical member 522 in this modified example 3 has the function of directing the left eye's normal observation light LWL and the fluorescent LF4, which were not cut off by the third optical member 521, toward the third image sensor 523. 【0166】 In this modified example 3, the correspondence between the first and third image sensors 513 and 523, white light, and the first to fourth fluorescence is as shown in Table 4 below. 【0167】 [Table 4] 【0168】 In Table 4, "◎" indicates that 3D imaging is possible. That is, a 3D image can be generated from the normal observation image for the right eye generated by the first image sensor 513 and the normal observation image for the left eye generated by the third image sensor 523. Also, "〇" indicates that 2D (two-dimensional) imaging is possible. That is, the first image sensor 513 can generate a 2D third fluorescence observation image. Furthermore, the third image sensor 523 can generate a 2D fourth fluorescence observation image. Note that this fourth fluorescence observation image refers to the pixel signal obtained from imaging the fourth fluorescence in the third image sensor 523. Finally, "×" indicates that it is not compatible. 【0169】 The operation corresponding to the third mode and the operation corresponding to the fifth mode in this modified example 3 will be described in order below. 【0170】 [Operation according to the third mode] The operation of the first imaging unit 51 and the light source device 3 in the third mode, the operation of the second imaging unit 52 and the light source device 3 in the third mode, and the updated image of the captured image generated in the third mode will be described in order below. 【0171】 [Operation of the first imaging unit and light source device in the third mode] Figure 30 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the third mode. Specifically, Figures 30(a) to 30(e) correspond to Figures 23(a) to 23(e), respectively. Figure 30(f) corresponds to Figure 6(f). 【0172】 When set to the third mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 in the same way as when set to the third mode in the modified example 2 described above, as shown in Figure 30. 【0173】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye and a third fluorescence observation image (fluorescence observation light for the right eye) are generated. 【0174】 [Operation of the second imaging unit and light source device in the third mode] Figure 31 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the third mode. Specifically, Figures 31(a) to 31(e) correspond to Figures 24(a) to 24(d) and Figure 24(f), respectively. Figure 31(f) corresponds to Figure 6(d). 【0175】 When set to the third mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3, as shown in Figure 31, in the same manner as when set to the third mode in the modified example 2 described above. 【0176】 Based on the operation of the second imaging unit 52 and the light source device 3 described above, a normal observation image for the left eye is generated. 【0177】 [Updated image of the captured image generated in the third mode] Figure 32 shows the updated image of the captured image generated in the third mode. Specifically, Figures 32(a) to 32(c) correspond to Figures 11(a) to 11(c), respectively. As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the third fluorescence observation image (fluorescence observation light for the right eye) are updated every two frames (1 / 30 [s] period) by the operation of the first and second imaging units 51 and 52 and the operation of the light source device 3, respectively. 【0178】 [Operation according to the fifth mode] The fifth mode generates a normal observation image for the right eye, a normal observation image for the left eye, and a fourth fluorescence observation image. The operation of the first imaging unit 51 and the light source device 3 in the fifth mode, the operation of the second imaging unit 52 and the light source device 3 in the fifth mode, and the updated image of the captured image generated in the fifth mode will be described in order below. 【0179】 [Operation of the first imaging unit and light source device in the fifth mode] Figure 33 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the fifth mode. Specifically, Figures 33(a) to 33(f) correspond to Figures 30(a) to 30(f), respectively. 【0180】 When set to the fifth mode, the control unit 94 performs imaging control of the first image sensor 513 in the same manner as when set to the third mode, as shown in Figure 33(c). 【0181】 Furthermore, as shown in Figures 33(d) and 33(f), the control unit 94 alternately emits white light from the first light source 31 and fourth fluorescence from the second light source 32 during the entire line exposure period TE1 for each frame (1 / 60 [s] period) of the first image sensor 513. Here, the power supply time to the first light source 31 is less than the entire line exposure period TE1 (1 / 120 [s]). As a result, the first light source 31 emits white light for a time less than the entire line exposure period TE1 (1 / 120 [s]). On the other hand, the power supply time to the second light source 32 is the entire line exposure period TE1. As a result, the second light source 32 emits fourth excitation light for a time equal to the entire line exposure period TE1 (1 / 120 [s]). Therefore, as shown in Figure 33(c), the first image sensor 513 captures white light and the fourth fluorescence in a time-division manner for each frame. However, the normal observation image for the right eye captured during the period when the fourth fluorescence was emitted is not used. In Figure 33(f), for the sake of explanation, the words "Fluorescence 4 Excitation Light," which signifies the emission of excitation light LE4 (the fourth excitation light), are written within the rectangular area indicating the power supply status. 【0182】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye is generated. 【0183】 [Operation of the second imaging unit and light source device in the fifth mode] Figure 34 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the fifth mode. Specifically, Figures 34(a) to 34(f) correspond to Figures 31(a) to 31(f), respectively. 【0184】 When set to the fifth mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 as shown below. As shown in Figure 34(c), the control unit 94 controls the imaging of the third image sensor 523, similar to when it is set to the third mode. For this reason, the third image sensor 523 captures white light and the fourth fluorescence in a time-division manner for each frame. In Figure 34(c), for the sake of explanation, the words "Fluorescence 4 Imaging" are written within the parallelogram region, indicating imaging of fluorescence LF4 (the fourth fluorescence). 【0185】 Based on the operation of the second imaging unit 52 and the light source device 3 described above, a normal observation image for the left eye and a fourth fluorescence observation image (fluorescence observation light for the left eye) are generated. 【0186】 [Updated image of the captured image generated in the fifth mode] Figure 35 shows the updated image of the captured image generated in the fifth mode. Specifically, Figures 35(a) and 35(b) correspond to Figures 8(a) and 8(b), respectively. Figure 35(c) shows the updated image of the fourth fluorescence observation image. In Figure 35(c), for the sake of explanation, the words "Fluorescence 4" are written within the rectangular area representing the fourth fluorescence observation image. As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the fourth fluorescence observation image (fluorescence observation light for the left eye) are updated every two frames (1 / 30 [s] period) by the operation of the first and second imaging units 51 and 52 and the operation of the light source device 3, respectively. 【0187】 Even when configured as in the modified example 3 described above, the same effects as those of the embodiment described above are achieved. Furthermore, since there are only two image sensors in total, further miniaturization can be achieved. 【0188】 (Modification 4) Figure 36 is a diagram corresponding to Figure 3, illustrating the configuration of the first and second imaging units 51 and 52 in the modified example 4 of the above-described embodiment. In the first imaging unit 51 of this modified example 4, the second image sensor 514 described in the above-described embodiment is not provided. Furthermore, in this modified example 4, the first to fourth optical members 511, 512, 521, and 522 are configured as shown below. 【0189】 The first and second optical members 511 and 512 in this modified example 4 have the same functions as the first and second optical members 511 and 512 described in the modified example 3 described above. 【0190】 As shown in Figure 36, the third optical member 521 in this modified example 4 has a light-cutting function that cuts out the excitation light LE1 and LE2 contained in the light that is focused at the insertion part 2 and incident on the third optical member 521. The light that is focused at the insertion part 2 and incident on the third optical member 521 is the normal observation light LWL for the left eye, the excitation light LE1 and LE2, and the fluorescence LF1 and LF2. 【0191】 As shown in Figure 36, the fourth optical member 522 in this modified example 4 has a light separation function that separates a portion of the fluorescent LF2 that was not cut off by the third optical member 521 and the normal observation light LWL for the left eye from the fluorescent LF1 and other fluorescent LF2. The fourth optical member 522 directs a portion of the fluorescent LF2 and the normal observation light LWL for the left eye toward the third image sensor 523, and directs the fluorescent LF1 and other fluorescent LF2 toward the fourth image sensor 524. 【0192】 In this modified example 4, the correspondence between the first, third, and fourth image sensors 513, 523, and 524, white light, and the first to third fluorescence is as shown in Table 5 below. 【0193】 [Table 5] 【0194】 In Table 5, "◎" and "(◎)" indicate that 3D imaging is possible. That is, a 3D image can be generated from the normal observation image for the right eye generated by the first image sensor 513 and the normal observation image for the left eye generated by the third image sensor 523. Furthermore, a 3D image can be generated from the third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))) generated by the first image sensor 513 and the third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) generated by the third image sensor 523. Furthermore, a 3D image can be generated from the third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))) generated by the first image sensor 513 and the third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) generated by the fourth image sensor 524. Also, "〇" means that it is possible to capture in 2D (two dimensions). That is, the fourth image sensor 524 can generate a 2D first fluorescence observation image. Also, the fourth image sensor 524 can generate a 2D second fluorescence observation image. Furthermore, "×" means that it is not supported. 【0195】 Hereinafter, the operations according to the first to fourth modes in this modification example 4 will be described in order. 【0196】 〔Operation according to the third mode〕 Hereinafter, the operations of the first imaging unit 51 and the light source device 3 in the third mode, the operations of the second imaging unit 52 and the light source device 3 in the third mode, and the updated image of the captured image generated in the third mode will be described in order. 【0197】 〔Operation of the first imaging unit and the light source device in the third mode〕 FIG. 37 is a diagram for explaining the operations of the first imaging unit 51 and the light source device 3 in the third mode. Specifically, (a) to (d) and (f) of FIG. 37 are diagrams corresponding to (a) to (e) of FIG. 16 respectively. (e) of FIG. 37 is a diagram corresponding to (f) of FIG. 6. 【0198】 When the third mode is set, as shown in FIG. 37, the control unit 94 controls the operations of the first imaging unit 51 and the light source device 3 in the same manner as when the third mode in the above-described modification example 1 is set. 【0199】 By the operations of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye and a third fluorescence observation image (the first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (the first fluorescence observation light))) are generated. 【0200】 〔Operation of the second imaging unit and the light source device in the third mode〕 FIG. 38 is a diagram for explaining the operations of the second imaging unit 51 and the light source device 3 in the third mode. Specifically, (a) to (e) and (g) of FIG. (g) are diagrams corresponding to (a) to (f) of FIG. 17 respectively. (f) of FIG. 38 is a diagram corresponding to (f) of FIG. 6. 【0201】 When set to the third mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 in the same way as when set to the third mode in the modified example 1 described above, as shown in Figure 38. 【0202】 Based on the operation of the second imaging unit 52 and the light source device 3 described above, a normal observation image for the left eye and a third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) are generated. 【0203】 [Updated image of the captured image generated in the third mode] Figure 39 shows the updated image of the captured image generated in the third mode. Specifically, Figures 39(a) to 39(c) correspond to Figures 18(a) to 18(c), respectively. As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the third fluorescence observation image (fluorescence observation light for the right eye, fluorescence observation light for the left eye) are updated every two frames (1 / 30 [s] period), as shown in Figure 39. 【0204】 [Operation according to the second mode] The operation of the first imaging unit 51 and the light source device 3 in the second mode, the operation of the second imaging unit 52 and the light source device 3 in the second mode, and the updated image of the captured image generated in the second mode will be described in order below. 【0205】 [Operation of the first imaging unit and light source device in the second mode] Figure 40 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the second mode. Specifically, Figures 40(a) to 40(f) correspond to Figures 37(a) to 37(f), respectively. When set to the second mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 as shown below. As shown in Figures 40(c) and 40(d), the control unit 94 controls the operation of the first imaging unit 51 and the first light source 31, similar to when set to the second and third modes in the embodiments described above. In addition, as shown in Figure 40(f), the control unit 94 constantly supplies power to the third light source 33. As a result, the third light source 33 remains lit and constantly emits the second excitation light. 【0206】 As described above, the operation of the first imaging unit 51 and the light source device 3 generates a normal observation image for the right eye. The normal observation image for the right eye contains a second fluorescence, but because the fluorescence intensity of this second fluorescence is weaker than that of the normal observation light for the right eye, it is obscured by the background (normal observation light for the right eye). 【0207】 [Operation of the second imaging unit and light source device in the second mode] Figure 41 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the second mode. Specifically, Figures 41(a) to 41(g) correspond to Figures 38(a) to 38(g), respectively. Figure 41(f) corresponds to Figure 9(f). When set to the second mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3, as shown in Figure 41, in the same manner as when set to the second and third modes in the embodiment described above. 【0208】 Based on the operation of the second imaging unit 52 and the light source device 3 described above, a normal observation image for the left eye and a second fluorescence observation image (fluorescence observation light for the left eye) are generated. 【0209】 [Updated image of the captured image generated in the second mode] Figure 42 shows the updated image of the captured image generated in the second mode. Specifically, Figures 42(a) to 42(c) correspond to Figures 11(a) to 11(c), respectively. As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the second fluorescence observation image (fluorescence observation light for the left eye) are updated every frame (1 / 60 [s] period) by the operation of the first and second imaging units 51 and 52 and the operation of the light source device 3, respectively. 【0210】 [Operation according to the first mode] The operation of the first imaging unit 51 and light source device 3 in the first mode, the operation of the second imaging unit 52 and light source device 3 in the first mode, and the updated image of the captured image generated in the first mode will be described in order below. 【0211】 [Operation of the first imaging unit and light source device in the first mode] Figure 43 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the first mode. Specifically, Figures 43(a) to 43(f) correspond to Figures 37(a) to 37(f), respectively. When set to the first mode, the control unit 94 controls the operation of the first image sensor 513 and the light source device 3 in the same way as when set to the first mode in the embodiment described above, as shown in Figure 43. 【0212】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye is generated. 【0213】 [Operation of the second imaging unit and light source device in the first mode] Figure 44 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the first mode. Specifically, Figures 44(a) to 44(g) correspond to Figures 38(a) to 38(g), respectively. 【0214】 When set to the first mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3 as shown below. As shown in (c) of FIG. 44, when set to the second mode, the control unit 94 performs imaging control of the third imaging device 523 in the same manner. Further, as shown in (e) of FIG. 44, the control unit 94 performs imaging control of the fourth imaging device 524 in the same manner as the imaging control of the third imaging control 523. At this time, the read timing of each field in the third and fourth imaging devices 523 and 524 is shifted by 1 / 120 [s] as shown in (c) of FIG. 44 and (e) of FIG. 44. Note that the read timing of each field may be shifted or may be the same. 【0215】 By the operations of the second imaging unit 52 and the light source device 3 described above, a left-eye normal observation image and a first fluorescence observation image (left-eye fluorescence observation light) are generated. 【0216】 [Update Image of the Captured Image Generated in the First Mode] FIG. 45 is a diagram showing an update image of the captured image generated in the first mode. Specifically, (a) to (c) of FIG. 45 are diagrams corresponding to (a) to (c) of FIG. 8, respectively. By the operations of the first and second imaging units 51 and 52 and the light source device 3 described above, the right-eye normal observation image, the left-eye normal observation image, and the first fluorescence observation image (left-eye fluorescence observation light) generated are updated every frame (at a period of 1 / 60 [s]) as shown in FIG. 45. 【0217】 [Operation Corresponding to the Fourth Mode] Hereinafter, the operations of the first imaging unit 51 and the light source device 3 in the fourth mode, the operations of the second imaging unit 52 and the light source device 3 in the fourth mode, and the update image of the captured image generated in the fourth mode will be described in order. 【0218】 [Operations of the First Imaging Unit and the Light Source Device in the Fourth Mode] Figure 46 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the fourth mode. Specifically, Figures 46(a) to 46(f) correspond to Figures 37(a) to 37(f), respectively. 【0219】 When set to the fourth mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3 as shown below. As shown in Figures 46(c) and 46(d), the control unit 94 controls the operation of the first image sensor 513 and the first light source 31, similar to when the system is set to the second mode. 【0220】 Furthermore, as shown in Figures 46(e) and 46(f), the control unit 94 alternately emits the first excitation light from the second light source 32 and the second or third excitation light from the third light source 33 or the fourth light source 34 during the entire line exposure period TE2 for each frame (1 / 60 [s] period) of the fourth image sensor 524. Here, the power supply time to the second to fourth light sources 32 to 34 is the entire line exposure period TE2 (1 / 120 [s]). As a result, the second light source 32 and the third light source 33 or the fourth light source 34 emit the second or third excitation light for the duration of the entire line exposure period TE2 (1 / 120 [s]). 【0221】 As described above, the operation of the first imaging unit 51 and the light source device 3 generates a normal observation image for the right eye. The normal observation image for the right eye contains a second or third fluorescence, but because the fluorescence intensity of the second or third fluorescence is weaker than that of the normal observation light for the right eye, it is obscured by the background (normal observation light for the right eye). 【0222】 [Operation of the second imaging unit and light source device in the fourth mode] Figure 47 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the fourth mode. Specifically, Figures 47(a) to 47(g) correspond to Figures 38(a) to 38(g), respectively. 【0223】 When set to the fourth mode, the control unit 94 controls the operation of the second imaging unit 51 and the light source device 3 as shown below. As shown in Figure 47(c), the control unit 94 performs imaging control of the third image sensor 523, similar to when it is set to the second mode. 【0224】 Furthermore, as shown in Figure 47(e), the control unit 94 controls the imaging of the fourth image sensor 524, similar to when it is set to the second mode. For this reason, the fourth image sensor 524 captures the first fluorescence and the second or third fluorescence in a time-division manner for each frame. 【0225】 Based on the operation of the second imaging unit 52 and the light source device 3 described above, a normal observation image for the left eye, a first fluorescence observation image (fluorescence observation light for the left eye), and a second fluorescence observation image (fluorescence observation light for the left eye) or a third fluorescence observation image (fluorescence observation light for the left eye) are generated. 【0226】 [Updated image of the captured image generated in the fourth mode] Figure 48 shows the updated image of the captured image generated in the fourth mode. Specifically, Figures 48(a) to 48(c) correspond to Figures 14(a) to 14(c), respectively. As described above, the normal observation image for the right eye and the normal observation image for the left eye are updated every frame (1 / 60 [s] period) by the operation of the first and second imaging units 51 and 52 and the operation of the light source device 3, respectively, as shown in Figure 48. In addition, the first fluorescence observation image (fluorescence observation light for the left eye) and the second fluorescence observation image (fluorescence observation light for the left eye) or the third fluorescence observation image (fluorescence observation light for the left eye) are updated every two frames (1 / 30 [s] period). 【0227】 Even when configured as in the modified example 4 described above, the same effects as those of the embodiment described above are achieved. Furthermore, since there are only three image sensors in total, further miniaturization can be achieved. 【0228】 (Variation 5) Figure 49 is a diagram corresponding to Figure 3, illustrating the configuration of the first and second imaging units 51 and 52 in the modified example 5 of the above-described embodiment. In the first imaging unit 51 of this modified example 5, the second image sensor 514 described in the above-described embodiment is not provided. Furthermore, in this modified example 5, the first to fourth optical members 511, 512, 521, and 522 are configured as shown below. 【0229】 The first to third optical members 511, 512, and 521 in this modified example 5 have the same functions as the first to third optical members 511, 512, and 521 described in the modified example 4 above. 【0230】 As shown in Figure 49, the fourth optical member 522 in this modified example 5 has a light separation function that separates the left eye normal observation light LWL and the fluorescent LF1 and LF2 that were not cut off by the third optical member 521. The fourth optical member 522 directs the left eye normal observation light LWL toward the third image sensor 523 and the fluorescent LF1 and LF2 toward the fourth image sensor 524. 【0231】 In this modified example 5, the correspondence between the first, third, and fourth image sensors 513, 523, and 524, white light, and the first to third fluorescence is as shown in Table 6 below. 【0232】 [Table 6] 【0233】 In Table 6, "◎" indicates that 3D imaging is possible. That is, a 3D image can be generated from the normal observation image for the right eye generated by the first image sensor 513 and the normal observation image for the left eye generated by the third image sensor 523. Furthermore, a 3D image can be generated from the third fluorescence observation image (first stereoscopic fluorescence observation image (fluorescence observation light for the right eye (first fluorescence observation light))) generated by the first image sensor 513 and the third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) generated by the fourth image sensor 524. In addition, "〇" indicates that 2D (two-dimensional) imaging is possible. That is, a 2D first fluorescence observation image can be generated by the fourth image sensor 524. Furthermore, a 2D second fluorescence observation image can be generated by the fourth image sensor 524. In addition, "×" indicates that it is not supported. 【0234】 The operation corresponding to the third mode in this modified example 5 will be described below. Note that the operation corresponding to the first, second, and fourth modes in this modified example 4 is the same as the operation corresponding to the first, second, and fourth modes in the modified example 4 described above. 【0235】 [Operation according to the third mode] The operation of the first imaging unit 51 and the light source device 3 in the third mode, the operation of the second imaging unit 52 and the light source device 3 in the third mode, and the updated image of the captured image generated in the third mode will be described in order below. 【0236】 [Operation of the first imaging unit and light source device in the third mode] Figure 50 is a diagram illustrating the operation of the first imaging unit 51 and the light source device 3 in the third mode. Specifically, Figures 50(a) to 50(f) correspond to Figures 37(a) to 37(f), respectively. When set to the third mode, the control unit 94 controls the operation of the first imaging unit 51 and the light source device 3, as shown in Figure 50, in the same manner as when set to the third mode in the modified example 4 described above. 【0237】 Based on the operation of the first imaging unit 51 and the light source device 3 described above, a normal observation image for the right eye and a third fluorescence observation image (first fluorescence observation image for stereoscopic vision (fluorescence observation light for the right eye (first fluorescence observation light))) are generated. 【0238】 [Operation of the second imaging unit and light source device in the third mode] Figure 51 is a diagram illustrating the operation of the second imaging unit 52 and the light source device 3 in the third mode. Specifically, Figures 51(a) to 51(g) correspond to Figure 38(g), respectively. 【0239】 When set to the third mode, the control unit 94 controls the operation of the second imaging unit 52 and the light source device 3, as shown in Figure 51, in the same manner as when set to the third mode in the modified example 4 described above. Here, as shown in Figures 51(c) and 51(g), the normal observation image for the left eye generated by the third image sensor 523 during the emission period of the third excitation light is not used. Also, as shown in Figure 51(e), the third fluorescence observation image generated by the fourth image sensor 524 is used. 【0240】 Based on the operation of the second imaging unit 52 and the light source device 3 described above, a normal observation image for the left eye and a third fluorescence observation image (second stereoscopic fluorescence observation image (fluorescence observation light for the left eye (second fluorescence observation light))) are generated. 【0241】 [Updated image of the captured image generated in the third mode] Figure 52 shows the updated image of the captured image generated in the third mode. Specifically, Figures 52(a) to 52(d) correspond to Figures 25(a) to 25(d), respectively. As described above, the normal observation image for the right eye, the normal observation image for the left eye, and the third fluorescence observation image (first stereoscopic fluorescence observation image (right eye fluorescence observation light (first fluorescence observation light))) are updated every two frames (1 / 30 [s] period), as shown in Figure 52. The third fluorescence observation image (second stereoscopic fluorescence observation image (left eye fluorescence observation light (second fluorescence observation light))) is updated every frame (1 / 60 [s] period). 【0242】 Even when configured as in the modified example 5 described above, the same effects as those of the embodiment described above are achieved. Furthermore, since there are only three image sensors in total, further miniaturization can be achieved. 【0243】 (Experimental variation 6) Figures 53 to 81 illustrate a modified example 6 of the embodiment. Specifically, Figures 53 and 54 illustrate images generated in the configurations of the embodiment and modified examples 1 to 5 described above. Figures 55 to 81 illustrate the left-eye video signal (Figure 55(a) to Figure 81(a)) and the right-eye video signal (Figure 55(b) to Figure 81(b)) displayed on the display device 7. In Figures 53 and 54, "OB1" represents the first observation target, indicating organs such as the liver. "OB2" represents the second observation target, indicating blood vessels. "Ar1" to "Ar3" indicate regions that emit fluorescence upon irradiation with excitation light, respectively. 【0244】 In the configurations of the above-described embodiment and the above-described modifications 1 to 5, for example, the captured images F1 to F14 shown in Figures 53 and 54 are generated. 【0245】 The captured image F1 shown in Figure 53(a) is a normal observation image for the left eye generated by the third image sensor 523. For the sake of explanation, the letters "WLI" indicating a normal observation image are written in the upper right corner of the captured image F1 in Figure 53(a). 【0246】 The captured image F2 shown in Figure 53(b) is a normal observation image for the right eye generated by the first image sensor 513. For the sake of explanation, the letters "WLI" indicating a normal observation image are written in the upper right corner of the captured image F2 in Figure 53(b). 【0247】 The image F3 shown in Figure 53(c) is a superimposed image obtained by superimposing a second fluorescence observation image, generated by the fourth image sensor 524, onto a normal observation image for the left eye generated by the third image sensor 523. Such superimposed images (and the superimposed images shown below are similar) are generated by known alpha blending or additive blending processes. For example, the region Ar2 showing the second fluorescence in the second fluorescence observation image is displayed in green or another color. In Figure 53(c), for the sake of explanation, the words "WLI+Fluorescence2" are written in the upper right corner of the image F3, indicating that it is a superimposed image obtained by superimposing a second fluorescence observation image onto a normal observation image. 【0248】 The image F4 shown in Figure 53(d) is a superimposed image obtained by superimposing the first fluorescence observation image generated by the second image sensor 514 onto the normal observation image for the right eye generated by the first image sensor. For example, the region Ar1 showing the first fluorescence in the first fluorescence observation image is shown in blue, etc. For the sake of explanation, in Figure 53(d), the words "WLI+Fluorescence1" are written in the upper right corner of the image F4, indicating that it is a superimposed image obtained by superimposing the first fluorescence observation image onto the normal observation image. 【0249】 The image F5 shown in Figure 53(e) is a superimposed image obtained by superimposing a third fluorescence observation image generated by the fourth image sensor 524 onto a normal observation image for the left eye generated by the third image sensor 523. For example, the third fluorescence region Ar3 in the third fluorescence observation image is shown in green. In Figure 53(e), for the sake of explanation, the words "WLI+fluorescence3" are added to the upper right of the image F5 to indicate that it is a superimposed image obtained by superimposing a third fluorescence observation image onto a normal observation image. 【0250】 The image F6 shown in Figure 53(f) is a superimposed image obtained by superimposing a third fluorescence observation image, generated by the second image sensor 514, onto a normal observation image for the right eye generated by the first image sensor 513. For example, the third fluorescence region Ar3 in the third fluorescence observation image is shown in green. In Figure 53(f), for the sake of explanation, the words "WLI+fluorescence3" are written in the upper right corner of the image F6, indicating that it is a superimposed image obtained by superimposing a third fluorescence observation image onto a normal observation image. 【0251】 The image F7 shown in Figure 53(g) is a superimposed image obtained by superimposing a third fluorescence observation image, also generated by the third image sensor 523, and a first fluorescence observation image, also generated by the fourth image sensor 524, onto a normal observation image for the left eye generated by the third image sensor 523. For example, the region Ar3 showing third fluorescence in the third fluorescence observation image is displayed in green, and the region Ar1 showing first fluorescence in the first fluorescence observation image is displayed in blue, etc. In Figure 53(g), for the sake of explanation, the words "WLI+fluorescence1+fluorescence3" are written in the upper right corner of the image F7, indicating a superimposed image obtained by superimposing the first and third fluorescence observation images onto a normal observation image. 【0252】 The image F8 shown in Figure 53(h) is a superimposed image obtained by superimposing a third fluorescence observation image, also generated by the first image sensor 513, and a first fluorescence observation image, also generated by the second image sensor 514, onto a normal observation image for the right eye generated by the first image sensor 513. For example, the region Ar3 showing third fluorescence in the third fluorescence observation image is displayed in green, and the region Ar1 showing first fluorescence in the first fluorescence observation image is displayed in blue, etc. In Figure 53(h), for the sake of explanation, the text "WLI+fluorescence1+fluorescence3" is written in the upper right corner of the image F8, indicating a superimposed image obtained by superimposing the first and third fluorescence observation images onto a normal observation image. 【0253】 The image F9 shown in Figure 54(a) is the second fluorescence observation image generated by the fourth image sensor 524. Since the second and fourth image sensors 524 are configured to capture images in monochrome, the first and second observation targets OB1 and OB2, which are not shown in Figure 54(a) (and similarly in Figures 54(b) through 54(f)), are represented by dashed lines. In addition, in Figure 54(a), the region Ar2, which has a strong fluorescence intensity in the second fluorescence, is represented by diagonal lines. Furthermore, for the sake of explanation, the words "Fluorescence 2," which indicates the second fluorescence observation image, are written in the upper right corner of the image F9 in Figure 54(a). 【0254】 The image F10 shown in Figure 54(b) is the first fluorescence observation image generated by the second image sensor 514. In Figure 54(b), the region Ar1, where the fluorescence intensity of the first fluorescence is strong, is represented by diagonal lines. Also, for the sake of explanation, the words "Fluorescence 1" are written in the upper right corner of the image F10 in Figure 54(b), indicating that it is the first fluorescence observation image. 【0255】 The image F11 shown in Figure 54(c) is the third fluorescence observation image generated by the fourth image sensor 524. In Figure 54(c), the region Ar3, where the fluorescence intensity of the third fluorescence is strong, is represented by diagonal lines. Also, for the sake of explanation, the words "Fluorescence 3" are written in the upper right corner of the image F11 in Figure 54(c) to indicate that it is the third fluorescence observation image. 【0256】 The image F12 shown in Figure 54(d) is the third fluorescence observation image generated by the first image sensor 513. In Figure 54(d), the region Ar3, where the fluorescence intensity of the third fluorescence is strong, is represented by diagonal lines. Also, for the sake of explanation, the words "Fluorescence 3" are written in the upper right corner of the image F12 in Figure 54(d), indicating that it is the third fluorescence observation image. 【0257】 The image F13 shown in Figure 54(e) is a superimposed image obtained by superimposing the third fluorescence observation image generated by the third image sensor 523 and the first fluorescence observation image generated by the fourth image sensor 524. For example, the region Ar1 showing the first fluorescence in the first fluorescence observation image is displayed in blue, and the region Ar3 showing the third fluorescence in the third fluorescence observation image is displayed in green, etc. For the sake of explanation, in Figure 54(e), the words "Fluorescence 1 + Fluorescence 3" are written in the upper right corner of the image F13 to indicate a superimposed image obtained by superimposing the first and third fluorescence observation images. 【0258】 The image F14 shown in Figure 54(f) is a superimposed image obtained by superimposing the third fluorescence observation image generated by the first image sensor 513 and the first fluorescence observation image generated by the second image sensor 514. For example, the region Ar1 showing the first fluorescence in the first fluorescence observation image is displayed in blue, and the region Ar3 showing the third fluorescence in the third fluorescence observation image is displayed in green, etc. In Figure 54(f), for the sake of explanation, the words "Fluorescence 1 + Fluorescence 3" are written in the upper right corner of the image F14 to indicate a superimposed image obtained by superimposing the first and third fluorescence observation images. 【0259】 The display control unit 933 then generates a display image that can be observed in stereoscopic view using the left-eye video signal and the right-eye video signal shown below. Examples of methods for stereoscopic observation include the top-and-bottom method, the side-by-side method, and the line-by-line method. 【0260】 In the example shown in Figure 55, the display control unit 933 uses the captured image F1 as the video signal for the left eye (Figure 55(a)) and the captured image F4 as the video signal for the right eye (Figure 55(b)). That is, the normal observation image corresponding to white light is displayed in 3D, and the region showing the first fluorescence is displayed in 2D. 【0261】 In the example shown in Figure 56, the display control unit 933 uses the captured image F3 as the video signal for the left eye (Figure 56(a)) and the captured image F2 as the video signal for the right eye (Figure 56(b)). That is, the normal observation image corresponding to white light is displayed in 3D, and the region showing the second fluorescence is displayed in 2D. 【0262】 In the example shown in Figure 57, the display control unit 933 uses the captured image F5 as the video signal for the left eye (Figure 57(a)) and the captured image F2 as the video signal for the right eye (Figure 57(b)). That is, the normal observation image corresponding to white light is displayed in 3D, and the region with strong fluorescence intensity of the third fluorescence is displayed in 2D. 【0263】 In the example shown in Figure 58, the display control unit 933 uses the captured image F5 as the video signal for the left eye (Figure 58(a)) and the captured image F4 as the video signal for the right eye (Figure 58(b)). That is, the normal observation image corresponding to white light is displayed in 3D, and the regions with strong fluorescence intensity of the first and third fluorescence are displayed in 2D, respectively. 【0264】 The display method described below in Figures 59 to 81 is a more natural and easier-to-view display method compared to the method described above, which displays the normal observation image corresponding to white light in 3D and the fluorescent area in 2D. 【0265】 In the example shown in Figure 59, the display control unit 933 uses an image where the first screen (parent screen) is the captured image F1 and the second screen (child screen) is the captured image F10 as the video signal for the left eye (Figure 59(a)), and an image where the first screen (parent screen) is the captured image F2 and the second screen (child screen) is the captured image F10 as the video signal for the right eye (Figure 59(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0266】 In the example shown in Figure 60, the display control unit 933 uses an image where the first screen (parent screen) is the captured image F1 and the second screen (child screen) is the captured image F9 as the video signal for the left eye (Figure 60(a)), and an image where the first screen (parent screen) is the captured image F2 and the second screen (child screen) is the captured image F9 as the video signal for the right eye (Figure 60(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0267】 In the example shown in Figure 61, the display control unit 933 uses an image where the first screen (parent screen) is the captured image F1 and the second screen (child screen) is the captured image F11 as the video signal for the left eye (Figure 61(a)), and an image where the first screen (parent screen) is the captured image F2 and the second screen (child screen) is the captured image F11 as the video signal for the right eye (Figure 61(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0268】 In the example shown in Figure 62, the display control unit 933 uses an image where the first screen (parent screen) is captured image F1 and the second screen (child screen) is captured image F11 as the video signal for the left eye (Figure 62(a)), and an image where the first screen (parent screen) is captured image F2 and the second screen (child screen) is captured image F10 as the video signal for the right eye (Figure 60(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0269】 In the example shown in Figure 63, the display control unit 933 uses an image where the first screen (parent screen) is the captured image F1 and the second screen (child screen) is the captured image F14 as the video signal for the left eye (Figure 63(a)), and an image where the first screen (parent screen) is the captured image F2 and the second screen (child screen) is the captured image F14 as the video signal for the right eye (Figure 63(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0270】 In the example shown in Figure 64, the display control unit 933 uses an image where the first screen (parent screen) is the captured image F1 and the second screen (child screen) is the captured image F4 as the video signal for the left eye (Figure 64(a)), and an image where the first screen (parent screen) is the captured image F2 and the second screen (child screen) is the captured image F4 as the video signal for the right eye (Figure 60(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0271】 In the example shown in Figure 65, the display control unit 933 uses an image where the first screen (parent screen) is the captured image F1 and the second screen (child screen) is the captured image F3 as the video signal for the left eye (Figure 65(a)), and an image where the first screen (parent screen) is the captured image F2 and the second screen (child screen) is the captured image F3 as the video signal for the right eye (Figure 65(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0272】 In the example shown in Figure 66, the display control unit 933 uses an image where the first screen (parent screen) is the captured image F1 and the second screen (child screen) is the captured image F5 as the video signal for the left eye (Figure 66(a)), and an image where the first screen (parent screen) is the captured image F2 and the second screen (child screen) is the captured image F5 as the video signal for the right eye (Figure 66(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0273】 In the example shown in Figure 67, the display control unit 933 uses an image where the first screen (parent screen) is captured image F1 and the second screen (child screen) is captured image F6 as the video signal for the left eye (Figure 67(a)), and an image where the first screen (parent screen) is captured image F2 and the second screen (child screen) is captured image F4 as the video signal for the right eye (Figure 67(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0274】 In the example shown in Figure 68, the display control unit 933 uses an image where the first screen (parent screen) is captured image F1 and the second screen (child screen) is captured image F6 as the video signal for the left eye (Figure 68(a)), and an image where the first screen (parent screen) is captured image F2 and the second screen (child screen) is captured image F8 as the video signal for the right eye (Figure 68(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0275】 In the example shown in Figure 69, the display control unit 933 uses an image where the first screen (parent screen) is the captured image F1 and the second screen (child screen) is the captured image F8 as the video signal for the left eye (Figure 69(a)), and an image where the first screen (parent screen) is the captured image F2 and the second screen (child screen) is the captured image F8 as the video signal for the right eye (Figure 69(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (Picture-in-Picture display). 【0276】 In the example shown in Figure 70, the display control unit 933 uses an image where the first screen is the captured image F1 and the second screen, displayed alongside the first screen, is the captured image F14, as the left-eye video signal (Figure 70(a)), and an image where the first screen is the captured image F2 and the second screen is the captured image F14, as the right-eye video signal (Figure 70(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (PoutP display). 【0277】 In the example shown in Figure 71, the display control unit 933 uses an image where the first screen is captured image F1 and the second screen is captured image F3 as the video signal for the left eye (Figure 71(a)), and an image where the first screen is captured image F2 and the second screen is captured image F3 as the video signal for the right eye (Figure 71(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (PoutP display). 【0278】 In the example shown in Figure 72, the display control unit 933 uses an image where the first screen is captured image F1 and the second screen is captured image F5 as the video signal for the left eye (Figure 72(a)), and an image where the first screen is captured image F2 and the second screen is captured image F5 as the video signal for the right eye (Figure 72(b)). In other words, the first screen is displayed in 3D and the second screen is displayed in 2D (PoutP display). 【0279】 In the example shown in Figure 73, the display control unit 933 uses an image where the first screen is the captured image F1 and the second screen is the captured image F5 as the video signal for the left eye (Figure 73(a)), and an image where the first screen is the captured image F2 and the second screen is the captured image F4 as the video signal for the right eye (Figure 73(b)). That is, the normal light images on the first and second screens are displayed in 3D, and the first and third fluorescence-showing regions on the second screen are displayed in 2D (PoutP display). 【0280】 In the example shown in Figure 74, the display control unit 933 uses an image where the first screen is the captured image F1 and the second screen is the captured image F5 as the video signal for the left eye (Figure 74(a)), and an image where the first screen is the captured image F2 and the second screen is the captured image F8 as the video signal for the right eye (Figure 74(b)). That is, the normal light image and the region showing the third fluorescence on the first and second screens are displayed in 3D, while the region showing the first fluorescence on the second screen is displayed in 2D (PoutP display). 【0281】 In the example shown in Figure 75, the display control unit 933 uses an image where the first screen is the captured image F1 and the second screen is the captured image F7 as the video signal for the left eye (Figure 75(a)), and an image where the first screen is the captured image F2 and the second screen is the captured image F6 as the video signal for the right eye (Figure 74(b)). That is, the normal light image and the region showing the third fluorescence on the first and second screens are displayed in 3D, while the region showing the first fluorescence on the second screen is displayed in 2D (PoutP display). 【0282】 In the example shown in Figure 76, the display control unit 933 uses the captured image F4 as the video signal for the right eye (Figure 76(b)), and the captured image F1', which has a simulated area showing the first fluorescence in the captured image F4 superimposed on the captured image F1, is used as the video signal for the left eye (Figure 76(a)). In Figure 76(a), for the sake of explanation, the words "WLI+Fluorescence 1 Simulated" are written in the upper right corner of the captured image F11 to indicate that a simulated area showing the first fluorescence has been superimposed on the captured image F1. In the example shown in Figure 76, the normal observation image corresponding to white light and the area Ar1 with strong fluorescence intensity of the first fluorescence are displayed in 3D. 【0283】 In the example shown in Figure 77, the display control unit 933 uses the captured image F3 as the left-eye video signal (Figure 77(a)) and the captured image F21, which has a simulated area showing the second fluorescence in the captured image F3 superimposed on the captured image F2, as the right-eye video signal (Figure 77(b)). In Figure 77(b), for the sake of explanation, the words "WLI+Fluorescence 2 Simulated" are written in the upper right corner of the captured image F21 to indicate that a simulated area showing the second fluorescence has been superimposed on the captured image F2. In the example shown in Figure 77, the normal observation image corresponding to white light and the area Ar2 with strong fluorescence intensity of the second fluorescence are displayed in 3D. 【0284】 In the example shown in Figure 78, the display control unit 933 uses the captured image F5 as the left-eye video signal (Figure 78(a)) and the captured image F22, which has a simulated third fluorescence region added to the captured image F5, as the right-eye video signal (Figure 78(b)). In Figure 78(b), for the sake of explanation, the words "WLI+Fluorescence 3 Simulated" are written in the upper right corner of the captured image F22 to indicate that a third fluorescence region has been simulated on the captured image F2. In the example shown in Figure 78, the normal observation image corresponding to white light and the region Ar3 with strong fluorescence intensity of the third fluorescence are displayed in 3D. 【0285】 In the example shown in Figure 79, the display control unit 933 uses the captured image F51, which has a simulated first fluorescence region from the captured image F4 added to the captured image F5, as the left-eye video signal (Figure 79(a)), and the captured image F41, which has a simulated third fluorescence region from the captured image F5 added to the captured image F4, as the right-eye video signal (Figure 79(b)). In Figure 79(a), for the sake of explanation, the text "WLI+Fluorescence 1 Simulated+Fluorescence 3" is written in the upper right corner of the captured image F51 to indicate that a simulated first fluorescence region from the captured image F5 has been added. In Figure 79(b), the text "WLI+Fluorescence 1+Fluorescence 3 Simulated" is written in the upper right corner of the captured image F41 to indicate that a simulated third fluorescence region from the captured image F4 has been added. In the example shown in Figure 79, the normal observation image corresponding to white light and the regions Ar1 and Ar3, where the fluorescence intensity of the first and third fluorescence is strong, are displayed in 3D, respectively. 【0286】 In the example shown in Figure 80, the display control unit 933 superimposes the third fluorescence observation image generated by the second imaging unit 52 onto the captured image F1 to create the captured image F1'', which is used as the video signal for the left eye (Figure 80(a)). It also superimposes the third fluorescence observation image generated by the first imaging unit 51 onto the captured image F23 to create the video signal for the right eye (Figure 80(b)). In other words, the normal observation image corresponding to white light and the region showing the third fluorescence are displayed in 3D. 【0287】 In the example shown in Figure 81, the display control unit 933 uses the captured image F1'' as the left-eye video signal (Figure 81(a)), and the captured image F44, which is obtained by superimposing the third fluorescence observation image generated by the first imaging unit 51 onto the captured image F4, as the right-eye video signal (Figure 81(b)). That is, the normal observation image corresponding to white light and the region showing the third fluorescence are displayed in 3D, while the region showing the first fluorescence is displayed in 2D. 【0288】 Even when displayed as in the modified example 6 described above, the same effects as those of the embodiment described above are achieved. Furthermore, different display methods may be used for each display mode. For example, when set to the first display mode, a display image that enables stereoscopic viewing is generated using normal observation images for the right and left eyes. When set to the second display mode, one of the normal observation images for the right or left eye is displayed in two dimensions, along with information indicating the fluorescent region contained in the first fluorescence observation image and information indicating the fluorescent region contained in the second fluorescence observation image. 【0289】 (Example 7) The medical observation system according to this modified example 7 is a medical observation system that uses a so-called videoscope (flexible endoscope) having an imaging unit on the tip side of the insertion part. For the sake of explanation, the medical observation system 1 according to this modified example 1 will be referred to as medical observation system 1B below. 【0290】 Figure 82 shows a modified example 7 of the embodiment. As shown in Figure 82, the medical observation system 1B includes an endoscope 300B that captures internal images of the observation site by inserting an insertion part 2B into the body and outputs the captured images, a light source device 3 that emits white light and excitation light from the tip of the endoscope 300B, a control device 9 that processes the captured images output from the endoscope 300B, and a display device 7 that is connected to the control device 9 via a second transmission cable 8 and displays an image based on the video signal processed by the control device 9. 【0291】 As shown in Figure 82, the endoscope 300B comprises a flexible, elongated insertion section 2B, an operating section 301 connected to the proximal end of the insertion section 2B for receiving various operations, and a universal cord 302 extending from the operating section 301 in a direction different from the direction in which the insertion section 2B extends, and containing various cables for connecting to the light source device 3 and the control device 9. As shown in Figure 82, the insertion portion 2B comprises a tip portion 24, a flexible curved portion 25 connected to the base end of the tip portion 24 and composed of a plurality of curved pieces, and a long, flexible pipe portion 26 connected to the base end of the curved portion 25. 【0292】 The tip section 24 incorporates a configuration substantially similar to that of the camera head 5 described in the above-described embodiment, although this is not shown in detail. The captured image captured by the tip section 24 is output to the control device 9 via the operation unit 301 and the universal code 302. 【0293】 Even when adopting the configuration of the modified example 7 described above, the same effects as those of the embodiment described above are achieved. 【0294】 (Variation 8) The medical observation system according to this modified example 8 is a medical observation system that uses a surgical microscope to magnify and image a predetermined field of view of the inside (in vivo) or surface (biological surface) of the subject being observed. For the sake of explanation, the medical observation system 1 according to this modified example 3 will be referred to as medical observation system 1C below. 【0295】 Figure 83 shows a modified example of the embodiment, part 8. As shown in Figure 83, the medical observation system 1C comprises a surgical microscope 12 that captures and outputs images for observing a subject, a control device 9 that processes the captured images output from the surgical microscope 12, and a display device 7 connected to the control device 9 via a second transmission cable 8 that displays images based on the video signals processed by the control device 9. 【0296】 As shown in Figure 83, the surgical microscope 12 comprises a microscope unit 121 that magnifies and images minute parts of a subject and outputs the captured image, a support unit 122 connected to the base end of the microscope unit 121 and including an arm that rotatably supports the microscope unit 121, and a base unit 123 that rotatably holds the base end of the support unit 122 and is movable on the floor surface. The control device 9 is installed on the base unit 123, as shown in Figure 83. Although not shown in detail, the base unit 123 also has a light source device 3 that emits white light and excitation light from the surgical microscope 12 to the object being observed. Furthermore, the base portion 123 may be fixed to the ceiling or wall, etc., to support the support portion 122, rather than being provided movably on the floor. 【0297】 Although not shown in detail in the illustration, the microscope unit 121 incorporates a configuration substantially similar to that of the camera head 5 described in the above-described embodiment. The image captured by the microscope unit 121 is output to the control device 9 via the first transmission cable 6, which is routed along the support unit 122. 【0298】 Even when adopting the configuration of the modified example 8 described above, the same effects as those of the embodiment described above are achieved. 【0299】 (Extreme variation 9) Figures 84 and 85 illustrate a modified example 9 of the embodiment. Specifically, Figure 84 is a side view of the ring light 15. Figure 85 is a front view of the ring light 15 (left side in Figure 84). In this modified example 9, in addition to the insertion part 2 described in the above-described embodiment, the ring light 15 shown in Figures 84 and 85 is detachably connected to the camera head 5. That is, depending on the user's usage, the camera head 5 may be connected to either the insertion part 2 or the ring light 15, as shown in Figure 84. 【0300】 The ring light 15 is not inserted into the object of observation like the insertion unit 2, but rather supplies first light and excitation light to the surgical unit and captures the white light and the reflected excitation light from the surgical unit. As shown in Figures 84 and 85, the ring light 15 comprises an illumination unit 151 and a subject image capture unit 152 that captures the subject image. 【0301】 As shown in Figures 84 and 85, the lighting unit 151 comprises a housing 1511 and a plurality of lighting lenses 1512. The housing 1511 has a ring shape centered on the optical axis Ax. The other end of the light guide 4 is detachably connected to the housing 1511. 【0302】 As shown in Figure 85, the multiple illumination lenses 1512 are arranged at predetermined intervals along the circumferential direction centered on the optical axis Ax on the front end face of the housing 1511. The multiple illumination lenses 1512 then irradiate the surgical area with white light and excitation light supplied from the light source device 3 and introduced into the housing 1511 via the light guide 4. 【0303】 The subject image acquisition section 152 extends along the optical axis Ax. Within the subject image acquisition section 152, there is an optical system composed of one or more lenses that collects the white light and the reflected excitation light (subject image) illuminated from multiple illumination lenses 1512 via the surgical section. In Figure 85, the subject image acquisition section 152 is depicted assuming a configuration where the subject side of the objective optical system is a single-lens system and then becomes a double-lens system midway; however, a configuration with a completely double-lens system is also acceptable. Furthermore, a connection section 1521 is provided at the base end (right side in Figure 84) of the subject image acquisition section 152. This connection section 1521 is designed (shaped) to be compatible with the eyepiece section 21 in the insertion section 2 and is detachably connected to the camera head 5. 【0304】 Even when adopting the configuration of the modified example 9 described above, the same effects as those of the embodiment described above are achieved. 【0305】 Furthermore, the following configurations also fall within the technical scope of this disclosure. (1) A medical stereoscopic observation imaging device comprising: a first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, and a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, wherein the first normal observation light and the second normal observation light are reflected light from an observation target that has been irradiated with normal light including at least a part of the wavelength band of visible light, and are observation lights having parallax with respect to each other, and the first fluorescence and the second fluorescence are fluorescence emitted from the observation target, and have different wavelength bands with respect to each other. (2) The medical stereoscopic observation imaging apparatus according to (1), wherein the first imaging unit comprises a first image sensor for imaging the first normal observation light and a second image sensor for imaging the first fluorescence, and the second imaging unit comprises a third image sensor for imaging the second normal observation light and a fourth image sensor for imaging the second fluorescence. (3) The medical stereoscopic imaging apparatus according to (2), wherein the fourth image sensor captures the second fluorescence and the third fluorescence, respectively, and the third fluorescence is emitted from the object being observed and has a stronger fluorescence intensity than the second fluorescence. (4) The medical stereoscopic observation imaging apparatus according to (2) or (3), wherein the first imaging unit captures the first normal observation light, the first fluorescence, and the first fluorescence observation light, respectively, and the second imaging unit captures the second normal observation light, the second fluorescence, and the second fluorescence observation light, respectively, and the first fluorescence observation light and the second fluorescence observation light are observation lights that are emitted from the object of observation, have a third fluorescence with a higher fluorescence intensity than the second fluorescence, and have parallax with respect to each other. (5) The medical stereoscopic observation imaging apparatus according to (4), wherein the first image sensor captures the first normal observation light and the first fluorescence observation light, and the third image sensor captures the second normal observation light and the second fluorescence observation light, respectively. (6) The medical stereoscopic observation imaging apparatus according to (4), wherein the first image sensor captures the first normal observation light and the first fluorescence observation light, and the fourth image sensor captures the second fluorescence and the second fluorescence observation light, respectively. (7) The medical stereoscopic observation imaging apparatus according to (1), wherein the first imaging unit comprises a first image sensor for imaging the first normal observation light and the first fluorescence, and the second imaging unit comprises a second image sensor for imaging the second normal observation light and the second fluorescence, respectively. (8) The medical stereoscopic observation imaging apparatus according to (1), wherein the first imaging unit comprises a first image sensor for imaging the first normal observation light and a second image sensor for imaging the first fluorescence and the second fluorescence, respectively, and the second imaging unit comprises a third image sensor for imaging the second normal observation light. (9) The medical stereoscopic observation imaging apparatus according to (8), wherein the first imaging unit captures the first normal observation light, the first fluorescence, the second fluorescence, and the first fluorescence observation light, respectively, and the second imaging unit captures the second normal observation light and the second fluorescence observation light, respectively, and the first fluorescence observation light and the second fluorescence observation light are observation lights that are emitted from the object of observation, have a third fluorescence with a higher fluorescence intensity than the second fluorescence, and have parallax with respect to each other. (10) The medical stereoscopic observation imaging apparatus according to (9), wherein the first image sensor captures the first normal observation light and the first fluorescence observation light, and the third image sensor captures the second normal observation light and the second fluorescence observation light, respectively. (11) The medical stereoscopic observation imaging apparatus according to (9), wherein the second image sensor captures the first fluorescence, the second fluorescence, and the first fluorescence observation light, and the third image sensor captures at least one of the second normal observation light, the second fluorescence, and the second fluorescence observation light. (12) A medical stereoscopic observation imaging device comprising: a first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, and a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, and a medical image processing device that processes an image obtained by imaging with the medical stereoscopic observation imaging device, wherein the first normal observation light and the second normal observation light are reflected light from an observation target irradiated with normal light including at least a part of the wavelength band of visible light, and are observation lights having parallax with respect to each other, and the first fluorescence and the second fluorescence are fluorescence emitted from the observation target, and are in different wavelength bands with respect to each other. (13) The medical stereoscopic observation system according to (12), wherein the medical image processing device generates a display image to be displayed on a display device based on at least one of a first normal observation image which is an image obtained by imaging with a first normal observation light and a second normal observation image which is an image obtained by imaging with a second normal observation light, and a first fluorescence observation image which is an image obtained by imaging with a first fluorescence and a second fluorescence observation image which is an image obtained by imaging with a second fluorescence. (14) The medical stereoscopic observation system according to (13), wherein the medical image processing device enables stereoscopic viewing using the first normal observation image and the second normal observation image, and generates a display image that displays in two dimensions at least one of the information indicating the fluorescent region included in the first fluorescence observation image and the information indicating the fluorescent region included in the second fluorescence observation image. (15) A medical stereoscopic observation system according to any one of (12) to (14), wherein the first imaging unit captures a first fluorescence observation light, the second imaging unit captures a second fluorescence observation light, the first fluorescence observation light and the second fluorescence observation light are observation lights that are emitted from the object of observation and have a third fluorescence with a higher fluorescence intensity than the second fluorescence and have parallax with respect to each other, and the medical image processing device generates a display image that enables stereoscopic viewing of information indicating the fluorescence regions contained in the first stereoscopic fluorescence observation image and the second stereoscopic fluorescence observation image, using the first stereoscopic fluorescence observation image which is the image obtained by capturing the first fluorescence observation light and the second stereoscopic fluorescence observation image which is the image obtained by capturing the second fluorescence observation light. (16) The medical stereoscopic observation system according to (13) or (14), wherein when the medical image processing device is set to a first display mode, it generates a display image that is stereoscopically viewable using the first normal observation image and the second normal observation image, and when it is set to a second display mode, it generates a display image that displays in two dimensions one of the first normal observation image and the second normal observation image, information indicating a fluorescent region included in the first fluorescence observation image, and information indicating a fluorescent region included in the second fluorescence observation image. (17) The medical stereoscopic observation system according to (13) or (14), wherein the display image includes a first display image displayed on a first screen and a second display image displayed on a second screen, the first display image being a display image that can be viewed stereoscopically by the first normal observation image and the second normal observation image, and the second display image being a display image that displays in two dimensions at least one of information indicating a fluorescent region included in the first fluorescent observation image and information indicating a fluorescent region included in the second fluorescent observation image. (18) The medical stereoscopic observation system according to (13) or (14), wherein the display image includes a first display image displayed on a first screen and a second display image displayed on a second screen, the first display image being a display image that can be viewed stereoscopically by the first normal observation image and the second normal observation image, and the second display image being a display image that displays in two dimensions at least one of the first normal observation image and the second normal observation image, information indicating a fluorescent region included in the first fluorescence observation image, and information indicating a fluorescent region included in the second fluorescence observation image. (19) The medical stereoscopic observation system according to (13) or (14), wherein the display image includes a first display image displayed on a first screen and a second display image displayed on a second screen, the first display image being a display image that can be viewed stereoscopically by the first normal observation image and the second normal observation image, and the second display image being a display image that can be viewed stereoscopically by the first normal observation image and the second normal observation image, and that displays in two dimensions at least one of the information indicating a fluorescent region included in the first fluorescent observation image and the information indicating a fluorescent region included in the second fluorescent observation image. (20) A medical image processing device for processing an image obtained by imaging with a medical stereoscopic observation imaging device, wherein the medical stereoscopic observation imaging device comprises a first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, and a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, wherein the first normal observation light and the second normal observation light are reflected light from an observation target irradiated with normal light including at least a part of the wavelength band of visible light, and are observation lights having parallax with respect to each other, and the first fluorescence and the second fluorescence are fluorescence emitted from the observation target when excitation light is irradiated, and the wavelength bands of each are different. [Explanation of symbols] 【0306】 1,1B,1C Medical Observation System 2,2B Insertion section 3 Light source device 4 Light Guide 5 Camera head 6. First transmission cable 7 Display device 8. Second transmission cable 9 Control device 10. Third transmission cable 12 Surgical microscope 15 Ring Lights 21 Eyepiece 24 Tip 25 Curved section 26 Flexible tube section 31 First light source 32 Second light source 33 The third light source 34 The fourth light source 51 First imaging unit 52 Second imaging unit 53 Communications Department 91 Communications Department 92 Image memory 93 Processing Modules 94 Control Unit 95 Input section 96 Output section 97 Memory section 121 Microscope Department 122 Support part 123 Base section 151 Lighting Section 152 Subject Image Capture Unit 300B Endoscope 301 Operation section 302 Universal Code 510,520 Optical components 511 First optical component 512 Second optical component 513 First image sensor 514 Second image sensor 521 Third optical component 522 Fourth optical component 523 Third image sensor 524 Fourth image sensor 931 Memory Controller 932 Image Processing Unit 933 Display Control Unit 1511 cabinet 1512 Illumination Lens 1521 Connection part Ar1~Ar3 area Ax optical axis CN1, CN2 connectors Images captured at F1~F14, F1', F1''', F21, F22, F31, F41~F44, F51~F53 OB1 First object of observation OB2 Second object of observation TE1, TE2 Full Line Exposure Period

Claims

[Claim 1] A first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, The system includes a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, respectively. The first normal observation light and the second normal observation light are, Reflected light from an object being observed, which is illuminated with normal light including at least a portion of the visible light wavelength band, and which is observation light having parallax with respect to each other. The first fluorescence and the second fluorescence are A medical stereoscopic imaging device that captures fluorescence emitted from the aforementioned observation target, each having a different wavelength band. [Claim 2] The first imaging unit is, The first image sensor captures the first normal observation light, The system comprises a second image sensor for imaging the first fluorescence, The second imaging unit described above is: A third image sensor that captures the second normal observation light, The medical stereoscopic imaging apparatus according to claim 1, further comprising a fourth image sensor for imaging the second fluorescence. [Claim 3] The fourth image sensor is, The second fluorescence and the third fluorescence are imaged, respectively. The third fluorescence is, The medical stereoscopic imaging device according to claim 2, wherein the fluorescence emitted from the observation target has a higher fluorescence intensity than the second fluorescence. [Claim 4] The first imaging unit is, The first normal observation light, the first fluorescence, and the first fluorescence observation light are each imaged. The second imaging unit described above is The second normal observation light, the second fluorescence, and the second fluorescence observation light are each imaged. The first fluorescence observation light and the second fluorescence observation light are, The medical stereoscopic observation and imaging apparatus according to claim 2, wherein the third fluorescence emitted from the observation target has a higher fluorescence intensity than the second fluorescence and is observation light having parallax with respect to each other. [Claim 5] The first image sensor is, The first normal observation light and the first fluorescence observation light are respectively imaged. The third image sensor described above is The medical stereoscopic observation imaging apparatus according to claim 4, which captures the second normal observation light and the second fluorescence observation light, respectively. [Claim 6] The first image sensor is, The first normal observation light and the first fluorescence observation light are respectively imaged. The fourth image sensor is, The medical stereoscopic observation imaging apparatus according to claim 4, which captures the second fluorescence and the second fluorescence observation light, respectively. [Claim 7] The first imaging unit is, The system includes a first image sensor that captures the first normal observation light and the first fluorescence, respectively. The second imaging unit described above is The medical stereoscopic observation and imaging apparatus according to claim 1, further comprising a second image sensor for imaging the second normal observation light and the second fluorescence, respectively. [Claim 8] The first imaging unit is, The first image sensor captures the first normal observation light, The system comprises a second image sensor that captures the first fluorescence and the second fluorescence, respectively. The second imaging unit described above is: The medical stereoscopic observation and imaging apparatus according to claim 1, further comprising a third image sensor for imaging the second normal observation light. [Claim 9] The first imaging unit is, The first normal observation light, the first fluorescence, the second fluorescence, and the first fluorescence observation light are each captured, The second imaging unit described above is: The second normal observation light and the second fluorescence observation light are respectively imaged. The first fluorescence observation light and the second fluorescence observation light are, The medical stereoscopic observation and imaging apparatus according to claim 8, wherein the third fluorescence emitted from the observation target has a higher fluorescence intensity than the second fluorescence and is observation light having parallax with respect to each other. [Claim 10] The first image sensor is, The first normal observation light and the first fluorescence observation light are respectively imaged. The third image sensor described above is The medical stereoscopic observation imaging apparatus according to claim 9, which captures the second normal observation light and the second fluorescence observation light, respectively. [Claim 11] The second image sensor described above is The first fluorescence, the second fluorescence, and the first fluorescence observation light are each captured, The third image sensor described above is The medical stereoscopic observation imaging apparatus according to claim 9, which images at least one of the second normal observation light, the second fluorescence, and the second fluorescence observation light. [Claim 12] A medical stereoscopic imaging device having a first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, and a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, The system includes a medical image processing device that processes images obtained by imaging using the aforementioned medical stereoscopic observation imaging device, The first normal observation light and the second normal observation light are, Reflected light from an object being observed, which is illuminated with normal light including at least a portion of the visible light wavelength band, and which is observation light having parallax with respect to each other. The first fluorescence and the second fluorescence are A medical observation system for fluorescence emitted from the aforementioned observation target, each having different wavelength bands. [Claim 13] The aforementioned medical image processing device is A medical stereoscopic observation system according to claim 12, which generates a display image to be displayed on a display device based on at least one of a first normal observation image obtained by imaging with a first normal observation light and a second normal observation image obtained by imaging with a second normal observation light, and a first fluorescence observation image obtained by imaging with a first fluorescence and a second fluorescence observation image obtained by imaging with a second fluorescence. [Claim 14] The aforementioned medical image processing device is A medical stereoscopic observation system according to claim 13, which enables stereoscopic viewing using the first normal observation image and the second normal observation image, and generates a display image that displays in two dimensions at least one of the information indicating the fluorescent region included in the first fluorescence observation image and the information indicating the fluorescent region included in the second fluorescence observation image. [Claim 15] The first imaging unit is, The first fluorescence observation light is captured, The second imaging unit described above is: A second fluorescence observation light is captured, The first fluorescence observation light and the second fluorescence observation light are, A third fluorescence emitted from the aforementioned object of observation, having a higher fluorescence intensity than the second fluorescence, and being an observation light having parallax between them, The aforementioned medical image processing device is A medical stereoscopic observation system according to claim 12, wherein a display image is generated that enables stereoscopic viewing of information indicating fluorescent regions included in the first stereoscopic fluorescence observation image and the second stereoscopic fluorescence observation image, using a first stereoscopic fluorescence observation image which is the image obtained by imaging with the first fluorescence observation light and a second stereoscopic fluorescence observation image which is the image obtained by imaging with the second fluorescence observation light. [Claim 16] The aforementioned medical image processing device is When set to the first display mode, the display image that enables stereoscopic viewing is generated using the first normal observation image and the second normal observation image. The medical stereoscopic observation system according to claim 13, which generates a display image that, when set to a second display mode, displays in two dimensions one of the first normal observation image and the second normal observation image, information indicating a fluorescent region included in the first fluorescence observation image, and at least one of the information indicating a fluorescent region included in the second fluorescence observation image. [Claim 17] The aforementioned display image is The first display image shown on the first screen, This includes a second display image shown on the second screen, The first display image mentioned above is A display image that enables stereoscopic viewing using the first normal observation image and the second normal observation image, The second display image is A medical stereoscopic observation system according to claim 13, wherein the display image is a two-dimensional display image of at least one of the information indicating a fluorescent region included in the first fluorescence observation image and the information indicating a fluorescent region included in the second fluorescence observation image. [Claim 18] The aforementioned display image is The first display image shown on the first screen, This includes a second display image shown on the second screen, The first display image mentioned above is A display image that enables stereoscopic viewing using the first normal observation image and the second normal observation image, The second display image is A medical stereoscopic observation system according to claim 13, wherein the display image is a two-dimensional display image of one of the first normal observation image and the second normal observation image, and at least one of the information indicating the fluorescent region included in the first fluorescence observation image and the information indicating the fluorescent region included in the second fluorescence observation image. [Claim 19] The aforementioned display image is The first display image shown on the first screen, This includes a second display image shown on the second screen, The first display image mentioned above is A display image that enables stereoscopic viewing using the first normal observation image and the second normal observation image, The second display image is A medical stereoscopic observation system according to claim 13, which enables stereoscopic viewing using the first normal observation image and the second normal observation image, and is a display image that displays in two dimensions at least one of the information indicating the fluorescent region included in the first fluorescence observation image and the information indicating the fluorescent region included in the second fluorescence observation image. [Claim 20] A medical image processing device for processing images obtained by imaging with a medical stereoscopic observation imaging device, The aforementioned medical stereoscopic imaging device is A first imaging unit that images a first normal observation light and at least one of a first fluorescence and a second fluorescence, The system includes a second imaging unit that images a second normal observation light and at least the other of the first fluorescence and the second fluorescence, respectively. The first normal observation light and the second normal observation light are, Reflected light from an object being observed, which is illuminated with normal light including at least a portion of the visible light wavelength band, and which is observation light having parallax with respect to each other. The first fluorescence and the second fluorescence are A medical image processing device comprising fluorescence emitted from the aforementioned object of observation, each having a different wavelength band.

Images