Light source module and endoscope

Abstract

The utility model discloses a light source module and an endoscope, and relates to the technical field of endoscopes. The light source module comprises a collimation module and a reflecting mirror which are sequentially located in the transmission direction of light beams emitted by the light source. A single LED is adopted as a light source, LED chips with multiple wavelengths are integrated on the single LED, and the LED chips with the multiple wavelengths comprise white light LED chips and / or LED chips with multiple single wavelengths. The collimation module is a fly-eye lens; each LED chip corresponds to one lens unit in the fly-eye lens; the reflector is an aspheric lens. A plurality of LED chips are integrated in a single LED, and the fly's-eye lens is adapted, so that the LED is convenient to install, devices are reduced, and errors are reduced; a single reflector is used for reflecting and condensing light, the light path can be folded, the size is reduced, and a compact system is adapted.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a light source module and an endoscope. Background Art

[0002] The light emitted by the light source in the endoscope is output through the optical fiber to provide illumination during endoscopic examination.

[0003] In the relevant endoscope light source module, multiple single-wavelength light emitting diodes (LEDs) are usually used as light sources. The light is collimated by the corresponding collimating lenses, and then multiple collimated light source groups cooperate with multiple dichroic mirrors to combine the colors. The combined light is focused on the end face of the optical fiber through the coupling lens, and the light is output through the optical fiber. The light source module is large in size, has many parts, and is heavy. In addition, due to the long optical path, the reflection and transmission loss of the dichroic mirror, surface contamination, etc., it causes serious energy loss and the efficiency of the entire system is not high.

[0004] It can be seen that providing a light source module with a small volume and low energy loss is a technical problem that people in this field need to solve urgently. Utility Model Content

[0005] The utility model aims to provide a light source module and an endoscope to solve the problems of large volume, long optical path and high energy loss in the existing light source module composed of multiple single-wavelength LEDs, multiple collimating lenses and multiple dichroic mirrors.

[0006] In order to solve the above technical problems, the utility model provides a light source module, comprising: a collimating module and a reflector sequentially located in the transmission direction of the light beam emitted by the light source;

[0007] The light source is a single LED, and the single LED is integrated with LED chips of multiple wavelengths, wherein the LED chips of multiple wavelengths include white light LED chips and / or multiple single wavelength LED chips;

[0008] The collimation module is a fly-eye lens; each LED chip corresponds to a lens unit in the fly-eye lens;

[0009] The reflecting mirror is an aspherical lens.

[0010] Exemplarily, the LED chips with multiple wavelengths include white light LED chips and multiple single wavelength LED chips;

[0011] The white light LED chip is located at the center of a single LED.

[0012] Exemplarily, all LED chips in a single LED are evenly distributed.

[0013] Exemplarily, the same single-wavelength LED chips in a single LED are evenly distributed on the single LED.

[0014] Exemplarily, the light source module further includes: a controller; the controller is connected to each LED chip.

[0015] Exemplarily, the number of LED chips is equal to the number of lens units in the fly-eye lens.

[0016] Exemplarily, the light source module further includes: a base, and the single LED is located on the base.

[0017] Exemplarily, the light source module further includes: a lens frame, and the fly-eye lens is located in the lens frame.

[0018] Exemplarily, the light source module further includes: a housing, the base, the single LED, the lens frame, the fly-eye lens, and the reflector are all located inside the housing, and the reflector is connected to the interior of the housing via a connector.

[0019] In order to solve the above technical problems, the utility model also provides an endoscope, including the above light source module.

[0020] The light source module provided by the utility model includes a collimator module and a reflector which are sequentially located in the transmission direction of the light beam emitted by the light source. The light source used is a single LED, and the single LED integrates LED chips with multiple wavelengths, wherein the LED chips with multiple wavelengths include white light LED chips and / or multiple single wavelength LED chips; the collimator module is a compound eye lens; each LED chip corresponds to a lens unit in the compound eye lens; and the reflector is an aspherical lens.

[0021] The beneficial effects of the present invention are as follows: firstly, from the perspective of the structure of the entire light source module, the previous light source module includes multiple single-wavelength LEDs, multiple collimating lenses, and multiple dichroic mirrors; while the light source module provided by the present invention only includes a single LED integrating multiple-wavelength LED chips, a collimating module composed of a compound eye lens, and a reflector, thereby reducing the number of optical devices used and the size of the light source module; secondly, from the perspective of the structure of the light source, since the present invention integrates multiple-wavelength LED chips on a single LED, the entire system is smaller in size, and compared to using multiple single-wavelength LEDs, the LED chips used in the light source module provided by the present invention include white light LED chips, and since the white light LED chips have high luminous efficiency, the light source module is improved. light effect; thirdly, from the perspective of the structure of the collimating module, compared with the previous use of multiple collimating lenses, the light source module provided by the utility model directly uses a compound eye lens as the collimating module, which is easy to install, and uses the compound eye lens as the entire collimating module, which further reduces the volume of the light source module, and each LED chip corresponds to a lens unit of the compound eye lens, which ensures as much as possible that the light beam emitted by each LED chip can be collimated by the corresponding lens unit, thereby improving the light effect; in addition, from the perspective of the structure of the light combining element, compared with the previous use of multiple dichroic mirrors for color combination, in the light source module provided by the utility model, a reflector of an aspherical lens is used as the light combining element, and a single reflector is used to reflect and focus light, with low energy loss, the ability to fold the light path, and reduce the size, making the structure of the light source module more compact.

[0022] In addition, the utility model also provides an endoscope, including the above-mentioned light source module, which has the same or corresponding technical features as the above-mentioned light source module and has the same effects as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a light source module provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of a single LED provided in an embodiment of the utility model;

[0026] Figure 3 A top view of a compound eye lens and a single LED arranged in a matrix provided by an embodiment of the utility model;

[0027] Figure 4 for Figure 3 An exploded view of a compound eye lens and a single LED arranged in a matrix is ​​shown;

[0028] Figure 5 A top view of a compound eye lens and a single LED arranged in a circle provided by an embodiment of the utility model;

[0029] Figure 6 for Figure 5 An exploded view of the compound eye lens and a single LED arranged in a circle is shown;

[0030] Figure 7 A top view of a hexagonal arrangement of a fly-eye lens and a single LED provided in an embodiment of the utility model;

[0031] Figure 8 for Figure 7 An exploded view of the hexagonal arrangement of the fly-eye lens and the single LED is shown;

[0032] Fig. 9 A schematic diagram of a light beam emitted from an LED chip and transmitted to an optical fiber end face after passing through a fly-eye lens provided by an embodiment of the utility model;

[0033] Fig.10 An exploded view of a miniaturized multi-spectral endoscope light source module provided by an embodiment of the utility model;

[0034] Fig.11 for Fig.10 The exploded view and combined cross-sectional view of the multi-spectral endoscope light source module are shown.

[0035] The figure numbers are as follows: 1 is the light source, 2 is the collimation module, 3 is the reflector, 4 is the compound eye lens, 5 is the optical fiber end face, 6 is the base, 7 is the lens frame, 8 is the housing, 9 is the optical fiber interface, 10 is the LED, 11 is the LED chip, 12 is the light source module, and 41 is the lens unit. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0037] The core of the utility model is to provide a light source module and an endoscope to solve the problems of large volume, long optical path and high energy loss in the existing light source module composed of multiple single-wavelength LEDs, multiple collimating lenses and multiple dichroic mirrors.

[0038] In the relevant endoscope light source module, multiple single-wavelength LEDs are usually used as light sources. The light is collimated by the corresponding collimating lenses, and then multiple collimated light source groups cooperate with multiple dichroic mirrors to combine the colors. The combined light is focused on the end face of the optical fiber through the coupling lens, and the light is output through the optical fiber. The system requires a large size, many parts, and heavy weight; and due to the long optical path, the reflection and transmission loss of the dichroic mirror, surface contamination and other reasons, the energy loss is serious, and the efficiency of the entire system is not high; in addition, the surface shape of the collimating lens is required to be high, otherwise it will directly affect the focusing effect of the coupling lens and affect the coupling efficiency with the optical fiber. Therefore, the embodiment of the utility model provides a light source module with a small size and low energy loss.

[0039] In order to facilitate those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Figure 1 A schematic diagram of a light source module provided by an embodiment of the utility model, such as Figure 1 As shown, the light source module comprises: a collimating module 2 and a reflector 3 which are sequentially located in the transmission direction of the light beam emitted by the light source 1;

[0040] The light source 1 is a single LED, and the single LED integrates LED chips with multiple wavelengths, wherein the LED chips with multiple wavelengths include white light LED chips and / or multiple single wavelength LED chips;

[0041] The collimation module 2 is a fly-eye lens; each LED chip corresponds to a lens unit in the fly-eye lens;

[0042] The reflecting mirror 3 is an aspherical lens.

[0043] There is no limitation on the number of LED chips integrated on a single LED, the wavelength corresponding to the LED chip, the position of the LED chip layout, etc., which are determined according to the actual situation. For example, the peak wavelengths of multiple single-wavelength chips are 415nm, 540nm, 595nm and 605nm respectively. The arrangement of the LED chip layout can be a matrix arrangement, a circular arrangement, a hexagonal distribution, etc.

[0044] The multiple wavelength LED chips used may all be composed of white light LED chips, or may all be composed of multiple single wavelength LED chips, or may be composed of white light LED chips and multiple single wavelength LED chips. In implementation, in order to meet multi-spectrum lighting, in the light source module, the multiple wavelength LED chips include white light LED chips and multiple single wavelength LED chips. For a single LED composed of white light LED chips and multiple single wavelength LED chips, the number and layout position of the white light LED chips are not limited. Since the white light LED has high luminous efficiency, in implementation, the white light LED chip is located at the center of the single LED. In order to reduce the difference in brightness of the light beam emitted by a single LED, all LED chips in the single LED can be evenly distributed; in addition, the same single wavelength LED chip in the single LED can also be evenly distributed on the single LED.

[0045] Here, taking a single LED in which the LED chip layout is arranged in a matrix as an example, the light source provided by the embodiment of the utility model is described. Figure 2 A schematic diagram of a single LED provided in an embodiment of the utility model. Figure 2 As shown, a single LED 10 is integrated with an LED chip 11. The LED chip 11 includes a white light LED chip and a variety of single wavelength LED chips. Figure 2 The small square in the center represents a white light LED chip, and the remaining filled small squares represent different single-wavelength LED chips. The squares filled with the same pattern represent the same single-wavelength LED chip, and the squares filled with different patterns represent single-wavelength LED chips with different wavelengths. Figure 2 In the figure, the LED chips 11 are evenly distributed, and the same single-wavelength LED chips are evenly distributed, such as the patterns filled in the small squares at the four corners of the outermost small square are the same.

[0046] In addition, in order to independently control the power of each chip, a controller is also provided in the light source module; the controller is connected to each LED chip. There is an interface for each LED chip on a single LED, and the controller is connected to the corresponding LED chip through the interface on the single LED, thereby controlling the power of various LED chips respectively.

[0047] After a single LED emits a light beam, the light beam will be deflected during the transmission process, increasing the loss of the light source module. Therefore, in order to reduce the loss of the light source module, a collimation module is set in the light source module. The light beam emitted by a single LED is collimated by the collimation module. If an independent collimation module is set for each light beam emitted by each LED chip, such as respectively configuring a corresponding independent collimating lens (all collimating lenses are not a whole), the structure of the entire light source will be complicated, and the surface shape of the collimating lens will be high, otherwise it will directly affect the focusing effect of the coupling lens and affect the coupling efficiency with the optical fiber. Therefore, in the light source module provided in the embodiment of the utility model, a compound eye lens is used as a collimating module.

[0048] The compound eye lens is transparent polycarbonate (PC). The compound eye lens contains multiple lens units. Each LED chip corresponds to a lens unit. After passing through the lens unit, the corresponding LED chip is light-controlled and collimated. If the number of lens units is greater than the number of LED chips, there will be redundant lens units, that is, there will be invalid lens units (that is, the light beam emitted by the LED chip is not collimated) in the compound eye lens, resulting in a large size of the compound eye lens. Therefore, in order to make the compound eye lens meet the needs and not make the compound eye lens large, in the light source module provided by the embodiment of the utility model, the number of LED chips is equal to the number of lens units in the compound eye lens.

[0049] In order to achieve that each LED chip corresponds to a lens unit, the arrangement of the lens units in the fly-eye lens can be determined according to the arrangement of the LED chips in a single LED. Figure 3 A top view of a compound eye lens and a single LED arranged in a matrix according to an embodiment of the utility model. Figure 4 for Figure 3 An exploded view of a compound eye lens and a single LED arranged in a matrix is ​​shown. Figure 3 and Figure 4 In the figure, the LED chips 11 (the small boxes represented by the dotted lines) in the single LED 10 (represented by the outermost large boxes) are arranged in a matrix, and the lens units 41 (represented by the solid boxes in the innermost large box) in the compound eye lens 4 (represented by the second outer large boxes) are also arranged in a matrix. Figure 5 A top view of a compound eye lens and a single LED arranged in a circle provided in an embodiment of the utility model. Figure 6 for Figure 5 An exploded view of a circular arrangement of a fly-eye lens and a single LED is shown. Figure 5 and Figure 6 In the embodiment, the LED chips 11 in the single LED 10 are arranged in a circular shape, and the lens units 41 in the fly-eye lens 4 are also arranged in a circular shape. Figure 7A top view of a hexagonal arrangement of a fly-eye lens and a single LED provided in an embodiment of the utility model. Figure 8 for Figure 7 An exploded view of a hexagonal arrangement of a fly-eye lens and a single LED is shown. Figure 7 and Figure 8 In the embodiment, the LED chips 11 in the single LED 10 are arranged in a hexagonal shape, and the lens units 41 in the fly-eye lens 4 are also arranged in a hexagonal shape.

[0050] The light beams emitted by each LED chip are collimated by the corresponding lens unit in the compound eye lens and then incident on the light combining element. In the embodiment of the utility model, a reflector is used as the light combining element. In order to ensure that the reflector used can achieve the light combining effect, the reflector is set to be a special off-axis curved surface, that is, an aspherical lens. The reflector can be made of metal or plastic, and the surface is treated with mirror reflection, and the treatment method can be electroplating, coating or polishing.

[0051] Fig. 9 A schematic diagram of a light beam emitted from an LED chip and transmitted to an optical fiber end face after passing through a fly-eye lens is provided in an embodiment of the utility model, as shown in FIG. Fig. 9 As shown, the light beam emitted from the LED chip 11 is controlled by the fly-eye lens 4, and then collimated and incident on the reflector 3 for focusing. The reflector 3 converges the light at the fiber end face 5 of the fiber interface, and then the light is guided out by the optical fiber. This solution uses a reflector to converge, which can compress the light path. The size of the overall system is only 40*40*34mm, which can be used in a small-volume light source host.

[0052] In practice, in order to make the structure of the light source module more stable, the light source module further includes: a base, and the single LED is located on the base. By fixing the single LED on the base, the light beam emitted by the LED is more stable.

[0053] During use, the compound eye lens is prone to scratches, which affect the collimation effect of the compound eye lens. Therefore, a lens frame is also provided in the light source module, and the compound eye lens is located in the lens frame. The size of the lens frame needs to match the size of the compound eye lens to better protect the compound eye lens.

[0054] In addition, the light source module is also provided with a shell. The base, the single LED, the lens frame, the compound eye lens, and the reflector are all located in the shell, and the reflector is connected to the inside of the shell through a connector.

[0055] Fig.10 An exploded diagram of a miniaturized multi-spectral endoscope light source module provided by an embodiment of the utility model, such as Fig.10 As shown, the light source module includes a base, an LED, a lens frame, a compound eye lens, a reflector, an optical fiber interface, and a housing. Fig.11 for Fig.10 The exploded view of the multi-spectral endoscope light source module is shown as a combined cross-sectional view. In the light source module 12, the LED, lens frame, fly-eye lens, reflector, and optical fiber interface are packaged in a structure composed of a base and a housing.

[0056] In the light source module provided by the embodiment of the present invention, firstly, from the perspective of the structure of the entire light source module, the previous light source module includes multiple single-wavelength LEDs, multiple collimating lenses, and multiple dichroic mirrors; while the light source module provided by the present invention only includes a single LED integrating multiple-wavelength LED chips, a collimating module composed of a compound eye lens, and a reflector, thereby reducing the number of optical devices used and the size of the light source module; secondly, from the perspective of the structure of the light source, since the LED chips of multiple wavelengths are integrated into a single LED in the present invention, the volume of the entire system is smaller, and compared with the use of multiple single-wavelength LEDs, the LED chips used in the light source module provided by the present invention include white light LED chips, and since the white light LED chips have high luminous efficiency, the light source is improved. The light effect of the module; again, from the perspective of the structure of the collimating module, compared with the previous use of multiple collimating lenses, the light source module provided by the utility model directly uses a compound eye lens as the collimating module, which is easy to install, and the compound eye lens is used as the entire collimating module, which further reduces the volume of the light source module, and each LED chip corresponds to a lens unit of the compound eye lens, which ensures as much as possible that the light beam emitted by each LED chip can be collimated by the corresponding lens unit, thereby improving the light effect; in addition, from the perspective of the structure of the light combining element, compared with the previous use of multiple dichroic mirrors for color combination, the light source module provided by the utility model uses a reflector of an aspherical lens as a light combining element, and uses a single reflector to reflect and focus light, which has low energy loss, can fold the light path, and reduce the size, making the structure of the light source module more compact. It can be seen that the use of multiple single-wavelength LED chips and compound eye lenses for collimation provided by the embodiment of the utility model, combined with a reflector as a coupling system, can achieve collimation and color combination in a very small space. Compared with existing light source modules, its advantages are: it only includes two optical components (a compound eye lens and a reflector), with a compact structure, fewer parts and light weight; the optical path is compressed, there are no components such as dichroic mirrors, and the energy loss is low; each unit of the compound eye lens is smaller in size and the light control is more precise.

[0057] A light source module is described above, and this embodiment also provides an endoscope. The endoscope provided in this embodiment includes the light source module described above. The embodiment of the light source module has been described in detail above, and the embodiment of the endoscope will not be repeated here.

[0058] The endoscope provided in this embodiment includes a light source module including a collimator module and a reflector which are sequentially located in the transmission direction of the light beam emitted by the light source. The light source used is a single LED, and the single LED integrates LED chips with multiple wavelengths, wherein the LED chips with multiple wavelengths include white light LED chips and / or multiple single-wavelength LED chips; the collimator module is a compound eye lens; each LED chip corresponds to a lens unit in the compound eye lens; and the reflector is an aspherical lens. First, from the perspective of the structure of the entire light source module, the previous light source module included multiple single-wavelength LEDs, multiple collimating lenses, and multiple dichroic mirrors; while the light source module provided by the utility model only includes a single LED that integrates multiple wavelength LED chips, a collimating module composed of a compound eye lens, and a reflector, which reduces the number of optical devices used and reduces the size of the light source module; secondly, from the perspective of the structure of the light source, since the utility model integrates multiple wavelength LED chips on a single LED, the entire system is smaller in size, and compared to using multiple single-wavelength LEDs, the LED chips used in the light source module provided by the utility model include white light LED chips, and since the white light LED chips have high luminous efficiency, the luminous efficiency of the light source module is improved; thirdly, From the perspective of the structure of the collimating module, compared with the previous use of multiple collimating lenses, the light source module provided by the utility model directly uses a compound eye lens as the collimating module, which is easy to install, and the compound eye lens is used as the entire collimating module, which further reduces the volume of the light source module, and each LED chip corresponds to a lens unit of the compound eye lens, which ensures as much as possible that the light beam emitted by each LED chip can be collimated by the corresponding lens unit, thereby improving the light efficiency; in addition, from the perspective of the structure of the light combining element, compared with the previous use of multiple dichroic mirrors for color combination, the light source module provided by the utility model uses a reflector of an aspherical lens as a light combining element, and uses a single reflector to reflect and focus light, which has low energy loss, can fold the light path, and reduce the size, making the structure of the light source module more compact. Based on the miniaturization of the light source module used in the endoscope, the entire endoscope structure is also reduced, thereby improving the user's comfort when using the endoscope.

[0059] The above is a detailed introduction to a light source module and an endoscope provided by the utility model. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the utility model.

[0060] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A light source module, characterized in that: include: A collimating module (2) and a reflector (3) are sequentially located in the transmission direction of the light beam emitted by the light source (1); The light source (1) is a single LED (10), and LED chips (11) with multiple wavelengths are integrated on the single LED (10), wherein the LED chips (11) with multiple wavelengths include white light LED chips and / or multiple single-wavelength LED chips; The collimating module (2) is a fly-eye lens (4); each LED chip (11) corresponds to a lens unit in the fly-eye lens (4); The reflecting mirror (3) is an aspherical lens.

2. The light source module according to claim 1, characterized in that: The LED chips (11) with multiple wavelengths include white light LED chips and multiple single wavelength LED chips; The white light LED chip is located at the center of a single LED (10).

3. The light source module according to claim 1 or 2, characterized in that: All LED chips (11) in a single LED (10) are evenly distributed.

4. The light source module according to claim 3, characterized in that: The same single-wavelength LED chips (11) in a single LED (10) are evenly distributed on the single LED (10).

5. The light source module according to claim 1, characterized in that: Also includes: Controller; The controller is connected to each LED chip (11).

6. The light source module according to claim 1, characterized in that: The number of LED chips (11) is equal to the number of lens units in the fly-eye lens (4).

7. The light source module according to claim 1, characterized in that: Also includes: A base (6), with a single LED (10) located on the base (6).

8. The light source module according to claim 7, characterized in that: Also includes: A lens frame (7), wherein the compound eye lens (4) is located in the lens frame (7).

9. The light source module according to claim 8, characterized in that: Also includes: The housing (8), the base (6), the single LED (10), the lens frame (7), the compound eye lens (4), and the reflector (3) are all located inside the housing (8), and the reflector (3) is connected to the inside of the housing (8) via a connecting piece.

10. An endoscope, characterized in that: A light source module comprising any one of claims 1 to 9.

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