Examination device and endoscopic examination equipment

Abstract

The utility model provides an examination device and endoscopic examination equipment, and relates to the technical field of medical instruments. The inspection device comprises a shell, an image acquisition assembly and at least one light-emitting device, a containing cavity is formed in the shell, and the image acquisition assembly and the at least one light-emitting device are arranged in the containing cavity; the shell is provided with a light-transmitting window communicated with the accommodating cavity, and the at least one light-emitting device and a light inlet of the image acquisition assembly face the light-transmitting window; the inspection device further comprises a first optical filter, and the first optical filter is located on the light-emitting side of at least one light-emitting device. The embodiment of the utility model provides an inspection device and endoscopic inspection equipment, and aims to improve the imaging quality of an image acquisition assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an inspection device and an endoscopic inspection equipment. Background Art

[0002] In the field of medical technology, an inspection device is commonly used to inspect the human body. The inspection device is usually provided with a camera component for receiving light to form an image.

[0003] Existing image acquisition components often have cameras and various optical components inside. These optical components can be used to transmit light, and the light can be used to form an image after being received by the camera.

[0004] However, the imaging quality of the image acquisition component needs to be improved. Utility Model Content

[0005] The embodiments of the present invention provide an inspection device and an endoscopic inspection equipment to improve the imaging quality of an image acquisition component.

[0006] In a first aspect, an embodiment of the present invention provides an inspection device, comprising a housing, an image acquisition assembly, and at least one light-emitting device, wherein the housing has an interior having a housing cavity, and the image acquisition assembly and the at least one light-emitting device are disposed in the housing cavity; a light-transmitting window is formed on the housing and communicates with the housing cavity, and light entrances of the at least one light-emitting device and the image acquisition assembly face the light-transmitting window;

[0007] The inspection device further includes a first filter, which is located on a light-emitting side of at least one of the light-emitting devices.

[0008] Optionally, the light-transmitting window is provided with a light-transmitting protective plate, and the first filter is fixed on the light-transmitting protective plate.

[0009] Optionally, the first filter is coated on the surface of the light-transmitting protective sheet facing the accommodating cavity;

[0010] Alternatively, the first filter is coated on the surface of the light-transmitting protective plate away from the accommodating cavity.

[0011] Optionally, the light emitting device comprises a narrow-band lamp, which emits narrow-spectrum light, wherein the wavelength range of the narrow-spectrum light is smaller than the wavelength range of white light;

[0012] Perpendicular to the direction of the first filter, the first filter covers the narrowband lamp.

[0013] Optionally, the light emitting device further comprises a white light lamp, and the white light lamp emits white light;

[0014] The first filter covers the white light lamp perpendicular to the direction of the first filter.

[0015] Optionally, the plurality of light-emitting devices include two white light lamps and two narrow-band lamps, the two white light lamps are located on opposite sides of the light entrance, and the two narrow-band lamps are located on opposite sides of the light entrance.

[0016] Optionally, perpendicular to the direction of the first filter, the first filter covers the light entrance.

[0017] Optionally, the narrow-band lamp emits at least one of green light, red light, blue light, infrared light and ultraviolet light.

[0018] Optionally, the first filter has a first filtering wavelength range and a second filtering wavelength range, the first filtering wavelength range is 400-680 nm, and the second filtering wavelength range is 810-830 nm.

[0019] In a second aspect, an embodiment of the present invention provides an endoscopic inspection device, comprising the inspection device as described in the first aspect.

[0020] In an embodiment of the present invention, the inspection device further includes a first optical filter located on the light-emitting side of at least one light-emitting device. Light emitted by the light-emitting device passes through the light-transmitting window and the first optical filter before being directed toward the object to be inspected. The first optical filter filters light before it enters the image acquisition component, thereby improving the spectral accuracy of the light entering the image acquisition component and, consequently, the quality of the image produced by the image acquisition component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of an inspection device provided in an embodiment of the present utility model;

[0022] Figure 2 For a Figure 1 Schematic diagram of part of the structure of the inspection device;

[0023] Figure 3 For a Figure 1 A top view of part of the structure of the inspection device;

[0024] Figure 4 For a Figure 1 A top view of part of the structure of the inspection device;

[0025] Figure 5 For another Figure 1 A top view of part of the structure of the inspection device;

[0026] Figure 6 For another Figure 1A top view of part of the structure of the inspection device;

[0027] Figure 7 For another Figure 1 A top view of part of the structure of the inspection device;

[0028] Figure 8 is a transmittance curve of the first filter;

[0029] Figure 9 For another Figure 1 Schematic diagram of part of the structure of the inspection device;

[0030] Figure 10 A schematic structural diagram of an image acquisition component provided by an embodiment of the present utility model;

[0031] Figure 11 A schematic structural diagram of an endoscopic inspection device provided in an embodiment of the present utility model;

[0032] Figure 12 A schematic structural diagram of another endoscopic inspection device provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] Figure 1 This is a schematic diagram of the structure of an inspection device provided by an embodiment of the present utility model. Figure 2 For a Figure 1 Partial structural diagram of the inspection device, Figure 3 For a Figure 1 Partial structural top view of the inspection device, see Figure 1-Figure 3 The inspection device 10 includes a housing 200, an image acquisition assembly 100, and at least one light-emitting device 300. The housing 200 has a receiving cavity 920 therein, and the image acquisition assembly 100 and the at least one light-emitting device 300 are disposed in the receiving cavity 920. The housing 200 is provided with a light-transmitting window 220 that communicates with the receiving cavity 920. The light inlet 101 of the at least one light-emitting device 300 and the image acquisition assembly 100 faces the light-transmitting window 220. The light-emitting side of the light-emitting device 300 faces the light-transmitting window 220. The light emitted by the light-emitting device 300 can pass through the light-transmitting window 220 and be emitted toward the object to be inspected, so that the image acquisition assembly 100 can capture an image of the object to be inspected.

[0035] The inspection device 10 also includes a first optical filter 400, located on the light-emitting side of at least one light-emitting device 300. Light emitted by the light-emitting device 300 passes through the light-transmitting window 220 and the first optical filter 400 before being directed toward the object to be inspected. The filtering effect of the first optical filter 400 filters the light before it enters the image acquisition component 100, thereby improving the spectral accuracy of the light entering the image acquisition component 100 and, consequently, the quality of the image produced by the image acquisition component 100.

[0036] Optionally, refer to Figure 1-Figure 3 The light-transmitting window 220 is provided with a light-transmitting protective sheet 230, and the first optical filter 400 is fixed on the light-transmitting protective sheet 230. The light-transmitting protective sheet 230 can protect the image acquisition component 100 to prevent the image acquisition component 100 from being contaminated by liquids, particles and other impurities. In the embodiment of the present utility model, the first optical filter 400 is fixed on the light-transmitting protective sheet 230. The relative positions of the light-transmitting protective sheet 230 and the light-emitting device 300 are fixed, so that the relative positions of the first optical filter 400 and the light-emitting device 300 are fixed, thereby avoiding relative movement between the first optical filter 400 and the light-emitting device 300, and avoiding the situation where the first optical filter 400 moves out of the propagation path of the light beam emitted by the light-emitting device 300 due to the movement of the first optical filter 400. The filtering effect of the first optical filter 400 is guaranteed.

[0037] In one embodiment, the first optical filter 400 may be a coating. It is fixed to the light-transmitting protective sheet 230 by coating. For example, the first optical filter 400 is coated on the surface of the light-transmitting protective sheet 230 away from the accommodating cavity 920. The first optical filter 400 is coated on the outer side of the light-transmitting protective sheet 230.

[0038] In another embodiment, the first optical filter 400 is applied to the surface of the light-transmitting protective sheet 230 facing the accommodating cavity 920. The first optical filter 400 is applied to the inner side of the light-transmitting protective sheet 230. The light-transmitting protective sheet 230 can protect the first optical filter 400 to prevent it from being contaminated by impurities such as liquids and particles.

[0039] Optionally, refer to Figure 1-Figure 3 The light-emitting device 300 includes a narrowband lamp 310, which emits narrow-spectrum light with a wavelength range smaller than that of white light. The first filter 400 covers the narrowband lamp 310 perpendicular to the direction of the first filter 400. The first filter 400 is located in the propagation path of the light beam emitted by the narrowband lamp 310. When the light beam from the narrowband lamp 310 passes through the first filter 400, it is filtered by the first filter 400. This improves the spectral accuracy of the light entering the image acquisition component 100, thereby improving the quality of the image captured by the image acquisition component 100.

[0040] For example, refer to Figure 1-Figure 3 The light-emitting device 300 further includes a white light lamp 320, which emits white light. The plurality of first filters 400 include a first sub-filter 410 and a second sub-filter 420. The first sub-filter 410 and the second sub-filter 420 are spaced apart. The plurality of narrowband lamps 310 include a first narrowband lamp 311 and a second narrowband lamp 312. The first narrowband lamp 311 and the second narrowband lamp 312 are spaced apart. The first sub-filter 410 covers the first narrowband lamp 311 and filters the light beam emitted by the first narrowband lamp 311. The second sub-filter 420 covers the second narrowband lamp 312 and filters the light beam emitted by the second narrowband lamp 312.

[0041] For example, refer to Figure 1-Figure 3 , the first filter 400 does not cover the white light lamp 320. The light beam emitted by the white light lamp 320 does not pass through the first filter 400, but is directly projected out. Therefore, the bandpass band of the first filter 400 does not need to include the visible light band. The requirements for the first filter 400 are reduced. For example, the first filter 400 can be a single bandpass filter. The first filter 400 can pass the light beam of the band emitted by the narrowband lamp 310. When multiple narrowband lamps 310 emit multiple light beams of different bands, each first filter 400 can be set based on the bandpass range of the narrowband lamp 310 covered by the first filter 400. Alternatively, each first filter 400 is set to have at least two bandpass bands.

[0042] Figure 4 For a Figure 1 Partial structural top view of the inspection device, see Figure 1 、 Figure 2 and Figure 4 , perpendicular to the direction of the first filter 400, the first filter 400 covers the white light lamp 320 and the narrowband lamp 310. The first filter 400 is in the propagation path of the light beams emitted by the narrowband lamp 310 and the white light lamp 320. When the light beam emitted by the narrowband lamp 310 passes through the first filter 400, it is filtered by the first filter 400. When the light beam emitted by the narrowband lamp 310 passes through the first filter 400, it is filtered by the first filter 400. The first filter 400 can be, for example, a dual-bandpass filter.

[0043] Optionally, refer to Figure 4 The plurality of light emitting devices 300 include two white light lamps 320 and two narrow band lamps 310 . The two white light lamps 320 are located on opposite sides of the light entrance 101 , and the two narrow band lamps 310 are located on opposite sides of the light entrance 101 .

[0044] For example, refer to Figure 4, the two narrow-band lamps 310 include a first narrow-band lamp 311 and a second narrow-band lamp 312. The first narrow-band lamp 311 and the second narrow-band lamp 312 are located on opposite sides of the light entrance 101. The first narrow-band lamp 311 and the second narrow-band lamp 312 can be located at two diagonal positions of the light entrance 101, for example. The two white light lamps 320 include a first white light lamp 321 and a second white light lamp 322, and the first white light lamp 321 and the second white light lamp 322 are located on opposite sides of the light entrance 101. The first white light lamp 321 and the second white light lamp 322 can be located at two diagonal positions of the light entrance 101, for example. The first narrow-band lamp 311, the second narrow-band lamp 312, the first white light lamp 321 and the second white light lamp 322 are respectively located at the four corner positions of the light entrance 101. In other embodiments, the narrow-band lamps 310 and the white light lamps 320 can also have other arrangement positions and arrangements.

[0045] For example, refer to Figure 4 The first optical filter 400 does not cover the light entrance 101 of the image acquisition component 100 . The light reflected by the object to be inspected does not pass through the first optical filter 400 when projected onto the light entrance 101 of the image acquisition component 100 .

[0046] Figure 5 For another Figure 1 Partial structural top view of the inspection device, see Figure 5 , perpendicular to the direction of the first filter 400, which covers the light inlet 101. When light reflected by the object to be inspected is projected into the light inlet 101 of the image acquisition component 100, it must pass through the first filter 400 and be filtered by the first filter 400. In this embodiment of the utility model, not only is light projected toward the object to be inspected filtered, but light reflected by the object is also filtered. This further improves the spectral accuracy of the light entering the image acquisition component 100, thereby improving the quality of the image produced by the image acquisition component 100.

[0047] For example, refer to Figure 5 The first filter 400 covers the light entrance 101 and the narrowband lamp 310, but does not cover the white light lamp. The light beam emitted by the white light lamp 320 does not pass through the first filter 400 but is directly projected out.

[0048] Figure 6 For another Figure 1 Partial structural top view of the inspection device, see Figure 6 , perpendicular to the direction of the first optical filter 400, the first optical filter 400 covers the light inlet 101, the narrowband lamp 310, and the white light lamp 320. By coating, a whole layer of the first optical filter 400 is formed directly on the transparent protective sheet 230. The coating accuracy and process requirements for the first optical filter 400 are relatively low. There is no need to perform patterning on the applied coating.

[0049] Figure 7 For another Figure 1 Partial structural top view of the inspection device, see Figure 7 The light-emitting device 300 includes only the narrowband lamp 310. The light-emitting device 300 does not include the white light lamp 320. The first optical filter 400 covers the light inlet 101 and the narrowband lamp 310. Furthermore, the first optical filter 400 is a single film layer, which requires lower coating accuracy and process requirements. There is no need to perform patterning on the applied coating.

[0050] Optionally, the narrowband lamp 310 emits at least one of green light, red light, blue light, infrared light, and ultraviolet light, thereby providing multiple illumination spectra for the inspected portion of the object to be inspected, thereby enabling the inspection device 10 to perform different inspections on the inspected portion of the object to be inspected.

[0051] For example, the light emitted by the white light lamp 320 may be white light, and the spectrum of the white light may be 420-680 nm. The white light lamp 320 may provide white light illumination for the inspected portion of the object to be inspected, thereby enabling the inspection device 10 to perform conventional white light inspection on the inspected portion of the object to be inspected.

[0052] Exemplarily, the light emitted by the narrowband lamp 310 may include at least one of green, red, and blue light. Specifically, the wavelength of the green light is in the range of 500 to 580 nm, with a central wavelength of 540 nm. Specifically, the wavelength of the red light is in the range of 580 to 680 nm, with a central wavelength of 650 nm. Specifically, the wavelength of the blue light is in the range of 400 to 500 nm, with a central wavelength of 415 nm. Multiple narrowband lamps 310 can provide green, red, and blue light illumination for the inspected portion of the object to be inspected, thereby enabling the inspection device 10 to perform narrowband imaging (NBI) on the subepidermal and supraepidermal blood vessels of the inspected portion of the object to be inspected.

[0053] For example, the light emitted by the narrowband lamp 310 may be infrared light, with a wavelength range of ≥700 nm and a central wavelength of 780 nm. The narrowband lamp 310 may provide infrared light to the inspected portion of the object to be inspected, thereby stimulating the targeted agent in the inspected portion to emit fluorescence, thereby enabling the inspection device 10 to perform targeted agent fluorescence detection on the inspected portion of the object to be inspected.

[0054] For example, the light emitted by the narrowband lamp 310 can be ultraviolet light, with a wavelength range of ≤400 nm and a central wavelength of 340 nm. The narrowband lamp 310 can provide ultraviolet light to the inspected portion of the object to be inspected, thereby stimulating the inspected portion to emit fluorescence, thereby enabling the inspection device 10 to perform autofluorescence detection on the inspected portion of the object to be inspected.

[0055] Figure 8 is the transmittance curve of the first filter, refer to Figure 8 The first filter 400 has a first filtering wavelength range and a second filtering wavelength range. The first filtering wavelength range is 400 to 680 nm, and the second filtering wavelength range is 810 to 830 nm. The first filter 400 has high transmittance in the first and second filtering wavelength ranges, allowing light within the first and second filtering wavelength ranges to pass through while filtering light outside the first and second filtering wavelength ranges. In other embodiments, the first filter 400 may also have other filtering wavelength ranges to allow light within other wavelength ranges to pass through.

[0056] Figure 9 For another Figure 1 Partial structural diagram of the inspection device, Figure 10 This is a schematic diagram of the structure of an image acquisition component provided by an embodiment of the present invention, with reference to Figure 9 and Figure 10 The image acquisition component 100 is electrically connected to the second mainboard 620 and has a light inlet 101 opposite the light-transmitting window 220 for receiving external light. The image acquisition component 100 can capture light from a predetermined position through the light-transmitting window 220 to form an image of the predetermined position.

[0057] Image acquisition assembly 100 may include a beam splitter prism 110, a first camera 140, and a second camera 130. Beam splitter prism 110 has a light inlet 101. External light enters beam splitter prism 110 through light inlet 101 and is split into a first light path and a second light path that are perpendicular to each other. Beam splitter prism 110 may include two right-angle prisms with inclined surfaces aligned with each other. One of the right-angle surfaces of one of the right-angle prisms serves as light inlet 101.

[0058] The image acquisition assembly 100 may further include a turning prism 120, which is located on the second optical path and between the beam splitter prism 110 and the second camera 130. The turning prism 120 can change the direction of the second optical path and fold the second optical path to shorten the distance between the beam splitter prism 110 and the second camera 130, thereby reducing the space occupied by the image acquisition assembly 100 and facilitating the miniaturization of the inspection device 10.

[0059] For example, the first camera 140 may include a first optical lens group 141 and a first image sensor 142 in sequence. The second camera 130 may include a second optical lens group 131 and a second image sensor 132 in sequence.

[0060] Illustratively, the image acquisition assembly 100 further includes a second filter 500. The second filter 500 is located on the side of the light inlet 101 of the image acquisition assembly 100. The second filter 500 is located on the side of the beam splitter prism 110 away from the first camera 140. Before light reflected by the object to be inspected enters the beam splitter prism 110, it passes through the second filter 500 and is filtered by the second filter 500. The filtered light enters the first image sensor 142 and the second image sensor 132 for imaging. This improves the spectral accuracy of the light entering the first camera 140 and the second camera 130, thereby enhancing the quality of the resulting images.

[0061] For example, the first image sensor can be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor. The image acquisition assembly 100 also includes a voice coil motor 170, to which the second camera 130 is connected. The voice coil motor 170 is used to drive the second camera 130 to move relative to the steering prism 120. The voice coil motor 170 has the advantages of a simple structure, easy control, and high movement precision, making it easy to adjust the position of the second camera 130 relative to the steering prism 120 to obtain higher-quality images.

[0062] For example, refer to Figure 2 and Figure 9 , the inspection device 10 also includes a light source circuit board 331. The light source circuit board 331 is connected to the housing 200. For example, the light source circuit board 331 can be indirectly connected to the housing 200 through a mounting bracket. The light source circuit board 331 is electrically connected to the first main board 610 so as to be controlled by the first main board 610. The light source circuit board 331 can be electrically connected to the first main board 610 through an FFC or a harness. In some possible implementations of the embodiments of the present application, the light source circuit board 331 can be a flexible printed circuit (FPC) that can be directly soldered to the first main board 610.

[0063] Figure 11 This is a structural diagram of an endoscopic inspection device provided by an embodiment of the present utility model. Figure 12 This is a schematic diagram of another endoscopic inspection device provided by an embodiment of the present invention, referring to Figure 11 and Figure 12 The endoscopic inspection equipment includes the inspection device 10 in the above embodiment.

[0064] refer to Figure 11 The endoscopic examination device may further include an endoscope 20. The inspection device 10 may be installed in the endoscope 20. For example, the inspection device 10 may be plugged into the endoscope 20 or screwed into the endoscope 20. The inspection device 10 and the endoscope 20 are electrically connected to inspect and / or treat a first preset location. The first preset location may be a human body cavity such as a uterine cavity, a nasal cavity, or an abdominal cavity.

[0065] The endoscope 20 is a visual medical device used to inspect and / or treat a human body cavity. For example, the endoscope 20 can be a hysteroscope, a nasal cavity mirror or a laparoscope. Figure 11 The endoscope 20 may include a first operating handle 600, a mirror tube 611, and an endoscope circuit board (not shown in the drawings). The first operating handle 600 has a first accommodating cavity with an open bottom end, and the endoscope circuit board is installed in the first accommodating cavity. The mirror tube 611 is connected to the first operating handle 600. The inspection device 10 can be installed in the first accommodating cavity via the bottom end of the first operating handle 600. For example, the inspection device 10 can be inserted into the first accommodating cavity or screwed into the first accommodating cavity. The inspection device 10 is electrically connected to the endoscope circuit board.

[0066] When inspecting and / or treating the first preset position, the mirror tube 611 can be inserted into the first preset position. The mirror tube 611 can obtain an image of the first preset position and transmit the image to the inspection device 10 through the endoscope circuit board, thereby inspecting and / or treating the first preset position.

[0067] The endoscopic examination device can also inspect and / or treat a second preset location. This second preset location can be an open human cavity, such as the mouth, or an exposed human surface, such as the skin. For example, when inspecting and / or treating the oral cavity, the inspection device 10 can be inserted into the open mouth. The inspection device 10 can capture and process images of the oral cavity, thereby performing an oral examination. When inspecting the skin, the inspection device 10 can be placed against the skin to perform skin inspection and / or treatment.

[0068] The second preset position can also be a human cavity with a closed opening, such as the vagina. Figure 12 In some possible implementations of the embodiments of the present application, the endoscopic inspection device may also include an expander 30, and the inspection device 10 may be installed in the expander 30. For example, the inspection device 10 may be inserted into the expander 30 or screwed into the expander 30.

[0069] The expander 30 is a device that can be inserted into a human cavity with a closed opening, such as the vagina, to expand the space of the human cavity, thereby facilitating the inspection of the human cavity. Figure 12 The expander 30 may include a second operating handle 700, a lower leaf 710 and an upper leaf 720. The second operating handle 700 has a second accommodating chamber with an open bottom end, and the top of the second operating handle 700 also has a visual window. The lower leaf 710 is located below the visual window and is connected to the second operating handle 700. The upper leaf 720 is located above the visual window and is rotatably connected to the second operating handle 700. The upper leaf 720 can be rotated relative to the second operating handle 700 to open or close with the lower leaf 710. When the upper leaf 720 and the lower leaf 710 are opened, the visual window is exposed. When the upper leaf 720 and the lower leaf 710 are closed, the visual window is blocked. The inspection device 10 can be installed in the second accommodating chamber via the bottom end of the second operating handle 700. For example, the inspection device 10 can be inserted into the second accommodating chamber or can be screwed into the second accommodating chamber.

[0070] When inspecting and / or treating a second predetermined location, such as a human body cavity such as the vagina, the upper leaf 720 can be controlled to rotate relative to the second operating handle 700, thereby closing with the lower leaf 710. The closed upper leaf 720 and lower leaf 710 are inserted into the second predetermined location. The upper leaf 720 is then controlled to rotate in the opposite direction relative to the second operating handle 700, thereby opening with the lower leaf 710, exposing a viewing window and expanding the space at the second predetermined location. The inspection device 10 can capture an image of the second predetermined location through the exposed viewing window, thereby enabling inspection and / or treatment of the second predetermined location.

[0071] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. An inspection device, characterized in that: The device comprises a housing, an image acquisition assembly, and at least one light-emitting device, wherein the housing has an interior containing a cavity, the image acquisition assembly and the at least one light-emitting device being disposed in the cavity; a light-transmitting window communicating with the cavity is formed on the housing, and light entrances of the at least one light-emitting device and the image acquisition assembly face the light-transmitting window; The inspection device further includes a first filter, which is located on a light-emitting side of at least one of the light-emitting devices.

2. The inspection device according to claim 1, characterized in that The light-transmitting window is provided with a light-transmitting protective plate, and the first filter is fixed on the light-transmitting protective plate.

3. The inspection device according to claim 2, characterized in that The first filter is coated on the surface of the light-transmitting protective sheet facing the accommodating cavity; Alternatively, the first filter is coated on the surface of the light-transmitting protective plate away from the accommodating cavity.

4. The inspection device according to claim 1, wherein: The light emitting device comprises a narrow-band lamp, the narrow-band lamp emitting narrow-spectrum light, the wavelength range of the narrow-spectrum light being smaller than the wavelength range of white light; Perpendicular to the direction of the first filter, the first filter covers the narrowband lamp.

5. The inspection device according to claim 4, characterized in that The light emitting device further includes a white light lamp, which emits white light; The first filter covers the white light lamp perpendicular to the direction of the first filter.

6. The inspection device according to claim 5, characterized in that The plurality of light emitting devices include two white light lamps and two narrow-band lamps, the two white light lamps are located on opposite sides of the light entrance, and the two narrow-band lamps are located on opposite sides of the light entrance.

7. The inspection device according to claim 4, characterized in that The first filter covers the light entrance in a direction perpendicular to the first filter.

8. The inspection device according to claim 4, characterized in that The narrowband lamp emits at least one of green light, red light, blue light, infrared light and ultraviolet light.

9. The inspection device according to claim 1, wherein: The first filter has a first filtering wavelength range and a second filtering wavelength range, the first filtering wavelength range is 400-680 nm, and the second filtering wavelength range is 810-830 nm.

10. An endoscopic inspection device, characterized in that: The apparatus comprises the inspection device according to any one of claims 1 to 9.

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