Handheld optical device used in sterile condition

Abstract

The present invention relates to a small optical device that can be used in a sterile state. A small optical device used in an operating room while held by hand may include a main body housing having a surface having an opening through which detection light passes, a detection optical system housed in the main body housing and into which detection light passing through the opening is incident, a display disposed on the other surface of the main body housing and displaying fluorescence incident on the detection optical system, and a detachable drape for wrapping the main body housing.

Description

Technology Field

[0001] The present invention relates to a small optical device that can be used in a sterile state. Background Technology

[0002] To prevent damage caused by bacterial infections, operating rooms must be maintained in a sterile or aseptic state. Unlike surgical instruments that can be sterilized, large medical devices used in operating rooms, such as microscopes, are covered with sterile drape sheets to prevent contamination. While medical devices and surgical tools used in operating rooms can be kept sterile in the manner described above, there is currently no method applicable to small medical devices. Prior art literature

[0003] Korean Published Patent Application No. 10-2021-0099600 The problem to be solved

[0004] The present invention aims to provide a structure capable of maintaining a small optical device used in surgery in a sterile state. means of solving the problem

[0005] According to one aspect of the present invention, a small optical device used in an operating room while held by hand is provided. The small optical device may include a main body housing having a surface having an opening through which detection light passes, a detection optical system received in the main body housing and into which detection light passing through the opening is incident, a display disposed on the other surface of the main body housing and displaying fluorescence incident on the detection optical system, a sterile drape for wrapping the main body housing, and a detachable drape comprising a drape bracket attached to the sterile drape to keep a first area of ​​the sterile drape corresponding to the opening flat, and detachably fastened to the main body housing to wrap the main body housing with a second area of ​​the sterile drape.

[0006] In one embodiment, the sterile drape may be in the form of a sheet or an envelope.

[0007] In one embodiment, a small optical device is housed in the main body housing so as to be partially exposed around the opening, and may further include a heat dissipation housing that dissipates heat generated inside the main body housing to the outside of the main body housing.

[0008] In one embodiment, the heat dissipation housing may include a bracket fastening plate disposed on one side of the main body housing to correspond to the drape bracket, a side wall extending downward with one end connected to the lower surface of the bracket fastening plate, and a bottom plate fixed to the other end of the side wall and having a through hole formed in the center.

[0009] In one embodiment, the small optical device is disposed in an internal space defined by the side wall and the bottom plate, and further includes an illumination system that irradiates fluorescent excitation light to excite a fluorescent material to irradiate the detection light, wherein the side wall and the bottom plate can transfer heat generated by the illumination system to the bracket fastening plate.

[0010] In one embodiment, the drape bracket is a magnet and can be magnetically fastened to the bracket fastening plate.

[0011] In one embodiment, the small optical device further comprises a socket and a stud detachably fixed to the socket, wherein one of the socket and the stud is placed on the drape bracket and the other may be placed on the bracket fastening plate.

[0012] In one embodiment, the small optical device further comprises a hook and a loop to which the hook is detachably fixed, wherein one of the hook and the loop is disposed on the drape bracket and the other may be disposed on the bracket fastening plate.

[0013] In one embodiment, the small optical device may further include a transparent protective plate placed at the entrance of the heat dissipation housing to prevent foreign matter from entering the main body housing.

[0014] In one embodiment, the transparent protective plate may be positioned at the entrance of the bracket fastening plate so as to protrude outward.

[0015] In one embodiment, the drape bracket comprises a lower bracket that is fastened to the bracket fastening plate and has a coupling projection disposed on its upper surface, and an upper bracket having a coupling groove formed concavely from its lower surface toward the inside at a position corresponding to the coupling projection, wherein the sterilization drape may be interposed between the lower bracket and the upper bracket.

[0016] In one embodiment, the bracket comprises a lower bracket having a through hole formed extending from the upper surface to the lower surface and fastened to the bracket fastening plate, and an upper bracket having a coupling projection extending by the thickness of the lower bracket at a position corresponding to the through hole, wherein the sterilization drape may be interposed between the lower bracket and the upper bracket.

[0017] In one embodiment, the detection optical system may include a light receiving lens that receives detection light incident through the aperture, an autofocus that adjusts the focus of the detection light passing through the light receiving lens, an optical filter that passes the focused detection light and blocks light having a wavelength other than the detection light, and an image sensor that detects the detection light passing through the optical filter.

[0018] In one embodiment, the drape bracket is ring-shaped, and the sterile drape is divided into a first region surrounded by the drape bracket and a second region outside the bracket, and the first region can be kept flat by the drape bracket.

[0019] In one embodiment, the detachable drape is fastened to the main body housing held by the second user by a first user who is in a sterile state, so that the sterile drape can be wrapped around the main body housing while interposed between the first user's hand and the main body housing. Effects of the invention

[0020] According to an embodiment of the present invention, a small optical device used in surgery can be maintained in a sterile state. Brief explanation of the drawing

[0021] Hereinafter, the present invention is described with reference to embodiments illustrated in the accompanying drawings. For the sake of understanding, the same reference numerals are assigned to identical components throughout the entire accompanying drawings. The configurations illustrated in the accompanying drawings are merely exemplary embodiments implemented to explain the present invention and are not intended to limit the scope of the invention. In particular, the accompanying drawings depict some components in a somewhat exaggerated manner to aid in understanding the invention. Since the drawings are a means for understanding the invention, it should be understood that the width or thickness of components depicted in the drawings may differ in actual implementation. Meanwhile, throughout the entire detailed description of the invention, the same components are described with reference to the same reference numerals. Figure 1 is a drawing illustrating an exemplary small optical device used in surgery. FIG. 2 is a diagram illustrating, exemplarily, the process of attaching a detachable drape to a small optical device. FIG. 3 is an exploded perspective view illustrating the structure of a small optical device in an exemplary manner. FIG. 4 is a diagram illustrating an exemplary fastening structure of a detachable drape and a heat dissipation housing to improve the heat dissipation performance of a small optical device. Figure 5 is a diagram functionally illustrating the configuration of a small optical device used in surgery. Figure 6 is a diagram illustrating an exemplary optical system of a small optical device used in surgery. FIG. 7 is a drawing illustrating, in an exemplary manner, the fastening structure of a detachable drape and a main body housing. Specific details for implementing the invention

[0022] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0023] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0024] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0025] When an element, such as a layer, region, or substrate, is described as existing "on" or extending "onto" another element, that element may be directly on or extending directly onto the other element, or there may be an intermediate intervening element. On the other hand, when an element is described as being "directly on" or extending "directly onto" another element, no other intermediate elements exist. Furthermore, when an element is described as being "connected" or "coupled" to another element, that element may be directly connected or directly coupled to the other element, or there may be an intermediate intervening element. On the other hand, when an element is described as being "directly connected" or "directly coupled" to another element, no other intermediate elements exist.

[0026] Relative terms such as "below," "above," "upper," "lower," "horizontal," "lateral," or "vertical" may be used herein to describe the relationship of one element, layer, or region to another element, layer, or region as illustrated in the drawings. These terms should be understood as intended to encompass other orientations of the device in addition to the orientation depicted in the drawings.

[0027] Hereinafter, embodiments of the present invention will be described in detail with reference to the relevant drawings. The technical features illustrated in each drawing may be implemented not only alone but also in combination with one or more technical features illustrated in other drawings.

[0028] Figure 1 is a drawing illustrating an exemplary small optical device used in surgery.

[0029] Fluorescent substances administered into the body can be used to identify lesions. Fluorescence makes it easier to distinguish lesions from surrounding normal tissue. When irradiated with fluorescent excitation light of a specific wavelength, the fluorescent substance emits light of a different wavelength from the excitation light—namely, fluorescence. Depending on the type of fluorescent substance, long-wavelength light, such as red or near-infrared light, is used as the fluorescent excitation light.

[0030] A fluorescence camera (10) is an example of a small optical device used in surgery. The fluorescence camera (10) is used during surgery to identify tissue injected with a fluorescent substance. The display (11) of the fluorescence camera (10) visually displays fluorescence, allowing the user to identify tissue injected with a fluorescent substance during surgery.

[0031] In the case of a fluorescence camera (10) used while held by hand, it can easily become contaminated by blood or tissue on the user's hand. Unlike surgical instruments that can be restored to a sterile state by high-temperature treatment or chemical treatment, or large medical devices wrapped in sterile drapes to prevent contamination, it is not easy to restore a contaminated fluorescence camera (10) to a sterile state. Even in the case of large medical devices, if the sterile drapes covering the outside become contaminated, significant effort and time are required to remove and reinstall them.

[0032] FIG. 2 is a diagram illustrating, exemplarily, the process of attaching a detachable drape to a small optical device.

[0033] The detachable drape (200) is intended to prevent contamination of the small optical device (100) so that it can be used in a sterile state and does not affect the operation of the small optical device (100). Since the detachable drape (200) must be attached to maintain the sterile state of the small optical device (100), the detachable drape (200) is treated as a component of the small optical device (100), except in cases where it is necessary to explain separately.

[0034] The detachable drape (200) includes a sterile drape (210) and a bracket (220) attached to the sterile drape (210). The bracket (220) is detachably fastened to the main body housing (110) to secure the sterile drape (210) to the main body housing (110), thereby allowing at least a portion of the sterile drape (210) to come into contact with the main body housing (110). In one embodiment, the sterile drape (210) may be secured to the main body housing (110) by the bracket (220) in a sheet state as illustrated. In another embodiment, the sterile drape (210) may be processed into an envelope shape and secured to the main body housing (110) after a small optical device (100) is inserted through the opening of the envelope. The fastening structure between the bracket (220) and the main body housing (110) will be explained in detail below with reference to FIGS. 4 and FIGS. 7.

[0035] The process of maintaining the sterile state of the small optical device (100) described in a general overview is explained.

[0036] In (a), the first user U1 must operate the removable drape (200) in a sterile state, but the second user U2 and the small optical device (100) do not necessarily need to be in a sterile state. The first user U1 unfolds the folded sterile drape (210) and then grasps the bracket (220) with his hand to fasten it to the small optical device (100). The second user U2 grasps the small optical device (100) so that the fastening groove faces the bracket (220).

[0037] In (b), when the bracket (220) is attached to the small optical device (100), the first user U1 can grasp the small optical device (100) wrapped in part of the sterile drape (210) with the hand that was holding the bracket (220). When the second user U2 releases the hand while the first user U1 is firmly grasping the small optical device (100), the first user U1 can wrap the rest of the sterile drape (210) around the entire small optical device (100). After wrapping the handle (120) with the sterile drape (210) and sealing it using a band or clip, the small optical device (100) can be used in a sterile state.

[0038] By applying the method described above, the disinfection or cleaning process to make the small optical device (100) sterile can be omitted. Therefore, it is possible to prevent malfunctions that may occur during the disinfection or cleaning process.

[0039] FIG. 3 is an exploded perspective view illustrating the structure of a small optical device in an exemplary manner.

[0040] A small optical device (100) includes a main body housing (110) that accommodates an illumination system (300) that emits light toward a subject to generate detection light directly or indirectly, and a detection optical system (400) that receives the detection light. A handle (120) may be attached to the main body housing (110) to make it easy for a user to grip. The main body housing (110) may have two or more surfaces, and an opening (111) through which detection light passes is formed on one surface (110a). Meanwhile, a display may be placed on the other surface of the main body housing (110).

[0041] When in operation, the small optical device (100) generates a significant amount of heat. Since the small optical device (100) is used wrapped by a removable drape (200), heat dissipation by the surrounding air is not easy. Therefore, a structure is required that can forcibly dissipate the heat generated inside to the outside.

[0042] The lighting system (300) includes a heat dissipation housing (310) that transfers heat generated inside a small optical device (100) to the outside of the main body housing (110) and / or to a drape bracket (220) of a detachable drape (200), and a lighting unit (320) that is housed inside the heat dissipation housing (310) and generates fluorescent excitation light. Meanwhile, the lighting system (300) may further include a transparent protective plate (33) that is fixed to the heat dissipation housing (310) to prevent foreign matter from entering the interior.

[0043] The heat dissipation housing (310) may include a bracket fastening plate (311) placed on one side (110a) of a small optical device (100), a side wall (312) that is connected to one end of the lower surface of the bracket fastening plate (311) and extends downward, and a bottom plate (313) that is fixed to the other end of the side wall (312) and has a through hole (314) formed in the center. When the drape bracket (220) and the bracket fastening plate (311) are fastened by magnetic force as shown in FIG. 4 (see FIG. 4), the heat dissipation housing (310) is formed of a ferromagnetic material, for example, iron, nickel, cobalt, or an alloy thereof. Meanwhile, when the drape bracket (220) and the bracket fastening plate (311) are fastened by a snap button or Velcro (see FIG. 7), the heat dissipation housing is formed of a metal with high thermal conductivity, for example, copper, aluminum, or an alloy thereof. Additionally or optionally, the heat dissipation housing (310) may be plated at least partially or entirely with a metal having high thermal conductivity, for example, copper, aluminum, or an alloy thereof.

[0044] The bracket fastening plate (311) extends horizontally from one end of the side wall (312) and can either directly dissipate some of the heat generated inside the small optical device (100) into the air or transfer it to the drape bracket (220) to dissipate the remaining heat into the air through the drape bracket (220). As illustrated, the bracket fastening plate (311) may extend horizontally over the entire circumference of the side wall (312) to have a ring shape, or it may extend horizontally only over a part of the circumference of the side wall (312). For fastening with the drape bracket (220) of the heat dissipation and / or detachable drape (200), the bracket fastening plate (311) is positioned so as to be at least partially exposed on one side (110a).

[0045] The side wall (312) extends between the bracket fastening plate (311) and the bottom plate (313) and can transfer heat from the bottom plate (313) to the bracket fastening plate (311). The internal space of the heat dissipation housing (310) in which the lighting unit (320) is accommodated can be defined by the side wall (312) and the bottom plate (313). In one embodiment, the side wall (312) may be a cylinder surrounding the internal space. In another embodiment, the side wall (312) includes a plurality of plate-shaped members connecting the bracket fastening plate (311) and the bottom plate (313), and the plurality of plate-shaped members may be spaced apart from each other.

[0046] The bottom plate (313) is coupled to the other end of the side wall (312) to define an internal space and may include a through hole (314) formed in the center. The optical system (400) can receive detection light passing through the through hole (314) to generate an image.

[0047] The lighting unit (320) may include a substrate (321) and a plurality of LEDs (Light emitting diodes) (323) disposed on the substrate (321). The plurality of LEDs (323) may irradiate fluorescent excitation light. The substrate (321) may include a through hole (322) formed in the center. The through hole (314) of the bottom plate (313) and the through hole (322) of the substrate (321) may be formed coaxially. In the substrate (321), the remaining parts excluding the wiring electrically connecting the plurality of LEDs (323) may be electrically insulated.

[0048] A transparent protective plate (330) can be placed on the upper part of the lighting unit (320) and can prevent foreign matter from entering through the through holes (314, 322). The upper surface of the transparent protective plate (330) facing outward can be flat or curved.

[0049] The detachable drape (200) may include a sterile drape (210) and a drape bracket (220) attached to the sterile drape (210). Fastening plate

[0050] FIG. 4 is a diagram illustrating an exemplary fastening structure of a detachable drape and a heat dissipation housing to improve the heat dissipation performance of a small optical device.

[0051] In FIG. 4 (a) to (e), the drape bracket (220) is a magnet made in a shape that can be magnetically fastened to the bracket fastening plate (311) and is attached to the sterile drape (200) by an adhesive member. The detachable drape (200) is used with the drape bracket (220, 220a) magnetically fastened to the main body housing (110). The drape bracket (220, 220a) is attached while the sterile drape (210) is substantially flat, so that the first region (211) can be kept flat. As a result, the refraction and reflection of detection light incident on the first region (211) can be minimized. On the other hand, the second region (212) does not need to be kept flat since it is intended to keep the small optical device (100) in a sterile state. Accordingly, the drape bracket (220, 220a) maintains a state in which the first region (211) is positioned on the optical path of the detection light. Referring to FIG. 4(a), the drape bracket (220) may be a ring with a cross-sectional width of W1, and the bracket fastening plate (311) may be a ring with a cross-sectional width of W2. Here, the width W1 and the width W2 may be substantially the same. Meanwhile, the inner diameter of the drape bracket (220) and the inner diameter of the bracket fastening plate (311) may be the same or different. The lower surface of the drape bracket (220) is attached to the sterile drape (210) by an adhesive member, for example, liquid adhesive, double-sided tape, etc. The sterile drape (210) can be divided into a first region (211) surrounded by a drape bracket (220) and a second region (212) outside the drape bracket (220).

[0052] In the illustrated fastening structure, a sterile drape (210) is interposed between a drape bracket (220) and a bracket fastening plate (311). However, if the sterile drape (210) is a sheet, the drape bracket (220) and the bracket fastening plate (311) may come into direct contact with each other, and the sterile drape (210) may be positioned on top of the drape bracket (220), depending on the user's choice. Meanwhile, even if the sterile drape (210) is an envelope, the drape bracket (220) may be attached to the inner surface of the envelope, so in that case, the drape bracket (220) and the bracket fastening plate (311) may come into direct contact with each other, and the sterile drape (210) may be positioned on top of the drape bracket (220).

[0053] A substrate (321) on which a plurality of LEDs (323) that generate a lot of heat during operation are arranged can come into contact with a bottom plate (313). As a result, the heat generated by the plurality of LEDs (323) can be efficiently transferred to the bracket fastening plate (311). The heat transferred to the bracket fastening plate (311) can be directly dissipated into the air or dissipated into the air by the drape bracket (220). Meanwhile, some of the heat generated by the plurality of LEDs (323) may be dissipated into the air by passing directly through the first region (211) without passing through the heat dissipation housing (310).

[0054] Referring to FIG. 4(b), the drape bracket (220a) may be a ring with a width W1, and the bracket fastening plate (311) may be a ring with a width W2. Here, the width W1 may be larger than the width W2. Thus, the surface area of ​​the drape bracket (220a) exposed to air is increased, and the heat dissipation effect may be enhanced.

[0055] Meanwhile, the transparent protective plate (330) may be placed at the entrance of the heat dissipation housing (310) defined by the bracket fastening plate (311). In one embodiment, the transparent protective plate (330) is placed at the entrance of the bracket fastening plate (311) so as to protrude outward, so that when the detachable drape (200) is fastened, the first region (211) can be in close contact with the upper surface of the transparent protective plate (330). Uneven parts, such as wrinkles that may occur in the first region (211), may obstruct the incidence of detection light, causing the image to become blurry or wavy. The step difference between the outer surface of the bracket fastening plate (311) and the transparent protective plate (330) may serve to pull the first region (211) radially toward the bracket fastening plate (311) or the drape bracket (220a), thereby removing the wrinkles that have occurred in the first region (211). Although not illustrated, in another embodiment, the upper surface of the transparent protective plate (330) is a convex curved surface, and the outer surface of the transparent protective plate (330) can be positioned at the entrance of the bracket fastening plate (311) without a step. In this case as well, the first region (211) can be in close contact with the upper surface of the transparent protective plate (330), so that wrinkles formed in the first region (2110) can be removed.

[0056] Referring to FIG. 4 (c), the drape bracket (220) may be a ring with a width W1, and the bracket fastening plate (311a) may be a ring with a width W2. Here, the width W2 may be larger than the width W1. The area of ​​the bracket fastening plate (311a) may be larger than the area of ​​the bracket fastening plate (311) exemplified in (a) and (b), thereby relatively improving heat dissipation performance.

[0057] Referring to FIG. 4(d), the drape bracket (220) may include a lower bracket (221) and an upper bracket (223). A sterile drape (210) is interposed between the lower bracket (221) and the upper bracket (223), and thus the first region (211) is defined by the lower bracket (221) and the upper bracket (223). The lower bracket (221) is a magnet that magnetically fastens to the bracket fastening plate (311), and a coupling projection (222) may be disposed on its upper surface. The upper bracket (223) may include a coupling groove (224) formed concavely from its lower surface toward the inside at a position corresponding to the coupling projection (222). The coupling projection (222) may penetrate the sterile drape (210) and be received in the coupling groove (224). Heat from the bracket fastening plate (311) can be transferred from the lower bracket (221) to the upper bracket (223) through the coupling projection (222). The upper bracket (223) may be formed of a metal (or metal alloy) with high thermal conductivity. Meanwhile, the coupling projection (222) is positioned on the upper bracket (223), and the coupling groove (224) may be formed on the lower bracket (221).

[0058] Referring to FIG. 4(e), the drape bracket (220) may include a lower bracket (225) and an upper bracket (227). A sterile drape (210) is interposed between the lower bracket (221) and the upper bracket (223). The sterile drape (210) is interposed between the lower bracket (225) and the upper bracket (227), and thus the first region (211) is defined by the lower bracket (225) and the upper bracket (227). The lower bracket (225) is a magnet that magnetically fastens to the bracket fastening plate (311) and includes a through hole (226) extending from the upper surface to the lower surface. A coupling projection (228) extending by the thickness of the lower bracket (225) may be disposed at a position corresponding to the through hole (226) of the upper bracket (227). The connecting projection (228) penetrates the sterile drape (210) and is received in the through hole (226), and can come into contact with the bracket fastening plate (311). The upper bracket (227) and the connecting projection (228) may be formed of a metal (or metal alloy) with high thermal conductivity. Through the connecting projection (228) in contact with the bracket fastening plate (311), heat can be efficiently transferred from the bracket fastening plate (311) to the upper bracket (228).

[0059] Figure 5 is a diagram functionally illustrating the configuration of a small optical device used in surgery.

[0060] Referring to FIG. 5, the small optical device (100) may include a lighting system (300), an autofocus (420), an image sensor (430), an image processing module (500), a display (510), a switch (520), and a battery (530).

[0061] The illumination system (300) irradiates light toward a subject to generate detection light directly or indirectly. Taking a fluorescent camera as an example, the illumination system (300) can irradiate fluorescent excitation light that excites a fluorescent substance to emit fluorescence. Fluorescent substances that can be injected into the body before surgery may be, for example, 5-ALA (5-Aminolevulinic Acid) which emits fluorescence with a peak value at about 635 nm when excited by fluorescent excitation light of about 400 nm, or ICG (indocyanine green) which emits fluorescence with a peak value at about 830 nm to about 850 nm when excited by fluorescent excitation light of about 740 nm to about 800 nm, but are not limited thereto. The brightness (or intensity), output time, output cycle, etc. of the fluorescent excitation light of the illumination system (300) can be controlled by a light source driver.

[0062] The auto focus (420) adjusts the focus of the detection light. The auto focus (420) can automatically adjust the focus of the detection light incident on the image sensor (430) according to the distance from the subject. Additionally, or optionally, the auto focus (420) has zoom-in and zoom-out functions and can be operated by user operation.

[0063] The image sensor (430) receives detection light to generate an image. Taking a fluorescence camera as an example, the detection light is fluorescence in the range of approximately 830 nm to approximately 850 nm, and the image sensor (430) includes a pixel array that detects fluorescence and outputs an electrical signal. The image sensor (430) may include a Readout IC (ROIC) that scans pixels and outputs an electrical signal externally. The image sensor driver controls the image sensor (430) to generate an electrical signal by resetting and selecting the pixel array according to preset operation parameters.

[0064] The image processing module (500) processes the image output by the image sensor (430) and outputs it to the display (510).

[0065] The switch (520) controls the operation of the small optical device (100). The switch (520) may be provided in multiple numbers and may include a power switch for supplying or cutting off power, a zoom-in / zoom-out switch, etc.

[0066] The battery (530) supplies the power required to operate the small optical device (100).

[0067] Figure 6 is a diagram illustrating an exemplary optical system of a small optical device used in surgery.

[0068] The detection optical system (400) generates an image using detection light incident through the aperture (111). The detection optical system may include a light receiving lens (410) that receives detection light incident through the aperture (111), an autofocus (420) that adjusts the focus of the detection light passing through the light receiving lens, an optical filter (423) that blocks light other than the detection light among the light passing through the autofocus (420), and an image sensor (430) that detects the detection light passing through the optical filter (423) to generate an image. Here, the detection optical system (400) may further include a relay lens (421) that extends the optical path of the detection light in the autofocus (420) and the optical filter (423). The light receiving lens (410), the autofocus (420), the relay lens (421), and the optical filter (423) may be arranged on the same optical axis. Additionally or optionally, the detection optical system may further include a mirror (425) positioned between the optical filter (423) and the image sensor (430) to reflect the detection light that has passed through the optical filter (423) toward the image sensor (430).

[0069] FIG. 7 is a drawing illustrating, in an exemplary manner, the fastening structure of a detachable drape and a main body housing.

[0070] The reason the drape bracket (220) must be used in a state where it is fastened in close contact with the main body housing (110) is, as described above, to maintain the first region (211), which is in a flat state, on the optical path of the detection light by the drape bracket (220). There are various fastening structures that maintain the state of being fastened to the bracket fastening plate (311), and below, snap button structures and Velcro structures are described as examples.

[0071] FIG. 7(a) illustrates a fastening structure by means of a snap button (600). The snap button (600) includes a socket (601) and a stud (602) having a projection shape that is inserted into the socket (601). In the illustrated structure, the socket (601) is positioned at the bottom of the drape bracket (220), and the sterile drape (210) is interposed between the drape bracket (220) and the socket (601). The stud (602) is positioned on the upper surface of the bracket fastening plate (311) exposed to the main body housing (110), so that when the drape bracket (220) is pressed toward the bracket fastening plate (311), the stud (602) can be inserted and fixed into the socket (601). Thus, the drape bracket (220) is detachably fastened to the bracket fastening plate (311). Although not illustrated, the placement positions of the socket (601) and the stud (602) are interchangeable. Additionally, in the illustrated fastening structure, a sterile drape (210) is interposed between the drape bracket (220) and the socket (601), but the sterile drape (210) may be attached to the upper surface of the drape bracket (220) and the socket (601) may be placed on the lower surface of the drape bracket (220).

[0072] FIG. 7(b) illustrates a fastening structure using Velcro (610). Velcro (610) includes a hook (611) and a loop (612). In the illustrated structure, the hook (611) is positioned on the lower part of the drape bracket (220), and the sterile drape (210) is interposed between the drape bracket (220) and the hook (611). The loop (612) is positioned on the upper surface of the bracket fastening plate (311) exposed to the main body housing (110), so that when the drape bracket (220) is pressed toward the bracket fastening plate (311), the hook (611) can be attached to the loop (612). Thus, the drape bracket (220) is detachably fastened to the bracket fastening plate (311). Similar to (a), the placement positions of the hook (611) and the loop (612) are interchangeable, and the hook (611) may be placed on the lower surface of the drape bracket (220).

[0073] Meanwhile, a snap button (600) or Velcro (610) may be placed on the main body housing (110). Referring to FIG. 7 (c), a stud (602) is placed on the main body housing (110) around the bracket fastening plate (311). After placing the drape bracket (220) to correspond to the bracket fastening plate (311), the socket (601) is pressed to secure it to the stud (602), thereby allowing the first region (211) to be maintained in the optical path of the detection light.

[0074] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

[0075] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention.

Claims

Claim 1 A main body housing having a surface having an opening through which detection light passes; a detection optical system accommodated in the main body housing and receiving detection light that has passed through the opening; a display disposed on the other surface of the main body housing and displaying a fluorescent image acquired by the detection optical system; a sterile drape wrapping the main body housing; a drape bracket attached to one surface of the sterile drape, maintaining a first region of the sterile drape corresponding to the opening flat, and detachably fastened to the main body housing to wrap the main body housing with a second region of the sterile drape; and a heat dissipation housing to which the drape bracket is detachably fastened, which is accommodated in the main body housing so as to be partially exposed around the opening, and which dissipates heat generated inside the main body housing to the outside of the main body housing, wherein the heat dissipation housing comprises a bracket fastening plate disposed on one surface of the main body housing to correspond to the drape bracket; and a side wall extending downward with one end connected to the lower surface of the bracket fastening plate. A small optical device comprising a bottom plate fixed to the other end of the side wall and having a through hole formed in the center. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A small optical device according to claim 1, further comprising an illumination system disposed in an internal space defined by the side wall and the bottom plate, which irradiates fluorescent excitation light that excites a fluorescent material to irradiate the detection light, wherein the side wall and the bottom plate transfer heat generated by the illumination system to the bracket fastening plate. Claim 6 A small optical device according to claim 1, wherein the drape bracket is a magnet and is magnetically fastened to the bracket fastening plate. Claim 7 A small optical device according to claim 1, further comprising a socket and a stud detachably fixed to the socket, wherein one of the socket and the stud is disposed on the drape bracket and the other is disposed on the bracket fastening plate. Claim 8 A small optical device according to claim 1, further comprising a hook and a loop to which the hook is detachably fixed, wherein one of the hook and the loop is disposed on the drape bracket and the other is disposed on the bracket fastening plate. Claim 9 A small optical device according to claim 1, further comprising a transparent protective plate disposed at the inlet of the heat dissipation housing to prevent foreign matter from entering the main body housing. Claim 10 A small optical device according to claim 9, wherein the transparent protective plate is positioned at the entrance of the bracket fastening plate so as to protrude outward. Claim 11 A small optical device according to claim 1, wherein the drape bracket comprises: a lower bracket fastened to the bracket fastening plate and having a coupling projection disposed on its upper surface; and an upper bracket having a coupling groove formed concavely from its lower surface toward the interior at a position corresponding to the coupling projection, wherein the sterilization drape is interposed between the lower bracket and the upper bracket. Claim 12 A small optical device according to claim 1, wherein the drape bracket comprises: a lower bracket having a through hole formed therein that is fastened to the bracket fastening plate and extends from the upper surface to the lower surface; and an upper bracket having a coupling projection extending by the thickness of the lower bracket at a position corresponding to the through hole, wherein the sterilization drape is interposed between the lower bracket and the upper bracket. Claim 13 A small optical device according to claim 1, wherein the detection optical system comprises: a light-receiving lens for receiving detection light incident through the aperture; an autofocus for adjusting the focus of the detection light passing through the light-receiving lens; an optical filter for passing the focused detection light and blocking light having a wavelength other than the detection light; and an image sensor for detecting the detection light passing through the optical filter. Claim 14 A small optical device according to claim 1, wherein the drape bracket is ring-shaped, and the sterile drape is divided into a first region surrounded by the drape bracket and a second region outside the drape bracket, and the first region is kept flat by the drape bracket. Claim 15 delete

Images