WO2021072931A1

WO2021072931A1 - Endoscopic camera and endoscopic camera system

Info

Publication number: WO2021072931A1
Application number: PCT/CN2019/122443
Authority: WO
Inventors: 曾强
Original assignee: 深圳迈瑞生物医疗电子股份有限公司
Priority date: 2019-10-16
Filing date: 2019-12-02
Publication date: 2021-04-22
Also published as: CN112656355A

Abstract

An endoscopic camera (50) and an endoscopic camera system (1000). The endoscopic camera (50) comprises a handle (1), a chip module (2), an optical module (3), and handwheel (4). The optical module (3) comprises a lens barrel (31), a fixed optical assembly (32), and an adjustable optical assembly (33). The adjustable optical assembly (33) comprises an adjustable lens base (331) and an adjustable lens group (332). The adjustable lens group (332) comprises a plurality of optical lenses (3321, 3322, 3323). The plurality of optical lenses (3321, 3322, 3323) are sequentially mounted in mounting holes of the adjustable lens base (331). At least one space ring (3324, 3325) is mounted between adjacent optical lenses (3321, 3322, 3323). A through hole (3324a) is formed on the space ring (3324, 3325). The shape of the through hole (3324a) on the space ring (3324, 3325) matches the shape of a light beam passing through the through hole (3324a). Since the space ring (3324, 3325) is provided between adjacent optical lenses (3321, 3322, 3323), and the shape of the through hole (3324a) on the space ring (3324, 3325) matches the shape of a light beam passing through the through hole (3324a), the space ring (3324, 3325) can avoid effective imaging light, and an axial end face of the space ring (3324, 3325) is blocked on an exit surface of the optical lens (3321, 3322, 3323), so as to prevent stray light from mixing in the imaging beam, avoiding influence of the stray light on imaging, thereby improving the quality of imaging.

Description

Endoscope camera and endoscope camera system

Technical field

This application relates to in-vivo diagnostic equipment, and in particular to an endoscopic camera and an endoscopic camera system.

Background technique

Rigid tube endoscope, mainly used for the diagnosis and/or treatment of lesions in the superficial and superficial parts of the human body and the oral cavity through puncture, such as cystoscope and hysteroscope. Rigid tube endoscope cannot be bent during operation .

The rigid tube endoscope mainly includes a camera, a light source, a light guide, a rigid tube endoscope, an optical bayonet, a camera host and a display. The endoscope camera includes optical components, which include several optical lenses. Part of the light exit surface of the optical lens is the effective exit area for emitting effective imaging light. The light emitted from the area outside the effective exit area and the outside mixed in The light is stray light, and the stray light is easily mixed into the effective imaging light, which affects the imaging quality.

Summary of the invention

technical problem

The solution to the problem

Technical solutions

An embodiment provides an endoscopic camera, which includes:

A handle, the handle has an accommodating cavity, and one end of the handle has an opening communicating with the accommodating cavity;

A chip module, the chip module being installed in the accommodating cavity of the handle;

The optical module includes a lens barrel, a fixed optical component, and an adjustable optical component. One end of the lens barrel is installed on the opening of the handle and connected with the chip module. The fixed optical The component is installed at the end of the lens barrel away from the chip module, and the adjustable optical component is mounted in the lens barrel to be axially movable; the adjustable optical component includes an adjustable lens seat and an adjustable lens The adjustable lens holder has a mounting hole, the adjustable lens group includes a plurality of optical lenses, and the plurality of optical lenses are sequentially installed in the mounting holes of the adjustable lens holder, and the adjacent optical lenses At least one spacer ring is installed between the lenses, the spacer ring has a through hole, and the shape of the through hole of the spacer ring matches the shape of the imaging beam emitted by the optical lens in front of it;

And a hand wheel, the hand wheel is rotatably sleeved on the lens barrel, and is connected with the adjustable optical assembly through a connecting piece.

In an embodiment, the inner wall of the through hole of the spacer is parallel to the boundary of the light beam passing through the through hole.

In an embodiment, the spacer is configured to allow the imaging beam to pass through.

In an embodiment, the spacer ring has a cylindrical structure, and the through hole is provided on the spacer ring along the axial direction.

In an embodiment, the exit surface of the optical lens has an effective exit area, and the axial end surface of the spacer covers an area other than the effective exit area of the optical lens.

In an embodiment, the axial end surface of the spacer ring covers all areas except the effective exit area of the optical lens.

In an embodiment, at least one of the plurality of optical lenses is used to emit diffused light, the diffused light forms a cone-shaped beam, and the through hole of the spacer through which the cone-shaped beam passes is a cone-shaped through hole , The expanding direction of the tapered through hole is consistent with the expanding direction of the cone beam.

In an embodiment, at least one of the plurality of optical lenses is used to emit parallel light, the parallel light forms a cylindrical light beam, and the through hole of the spacer through which the cylindrical light beam passes is a cylindrical through hole.

In an embodiment, the adjustable lens group includes a first adjustable lens, a second adjustable lens, and a third adjustable lens, and the first adjustable lens, the second adjustable lens, and the third adjustable lens Are arranged in the mounting hole of the adjustable lens holder sequentially away from the fixed optical components, the spacer includes a first spacer and a second spacer, and the first spacer is mounted on the first adjustable Between the lens and the second adjustable lens, the second spacer is installed between the second adjustable lens and the third adjustable lens.

In an embodiment, the first adjustable lens is used to emit diffused light, and the through hole of the first spacer is a tapered through hole.

In an embodiment, the second adjustable lens is used to emit parallel light, and the through hole of the second spacer is a cylindrical through hole.

In an embodiment, the end surface of the first adjustable lens facing the fixed optical component is flush with the end surface of the adjustable lens holder, and the third adjustable lens protrudes away from the end surface of the fixed optical component On the end face of the adjustable lens seat.

In an embodiment, the spacer ring is subjected to a surface matting and blackening treatment.

In an embodiment, the material of the spacer ring is aluminum alloy or copper alloy.

In an embodiment, the material of the spacer ring is aluminum alloy, and the surface matting and blackening treatment is black anodization; or, the material of the spacer ring is copper alloy, and the surface matting and blackening treatment is vacuum sputtering. Shoot.

In an embodiment, the inner surface of the spacer is a non-smooth diffuse reflection surface.

In an embodiment, fine sand particles, threads or grooves are provided on the inner surface of the spacer ring.

In an embodiment, the optical module further includes an anti-collision terminal, the anti-collision terminal is installed at an end of the adjustable lens holder away from the fixed optical component, and the anti-collision terminal protrudes axially The axial end face of the adjustable lens group.

In an embodiment, the end of the adjustable lens group away from the fixed optical component protrudes or is flush with the end surface of the adjustable lens seat.

In an embodiment, the anti-collision terminal is an elastic member.

In an embodiment, the anti-collision terminal is a sleeve.

In an embodiment, the end of the anti-collision terminal away from the fixed optical assembly is provided with a baffle ring, and the inner diameter of the baffle ring is greater than or equal to the beam diameter of the emitted light of the adjustable lens group.

In an embodiment, the end of the adjustable lens holder away from the fixed optical component has an axial annular protrusion or annular groove, and one end of the anti-collision terminal is sleeved on the annular protrusion of the adjustable lens holder. Up, or clamped in the annular groove of the adjustable lens seat.

In an embodiment, the anti-collision terminal and the adjustable lens holder are an integral structure.

In an embodiment, the anti-collision terminal includes a plurality of bumps, and the plurality of bumps are evenly installed on the end surface of the adjustable lens seat away from the fixed optical component.

An endoscope camera including:

The optical module includes a lens barrel, a fixed optical component, and an adjustable optical component. One end of the lens barrel is installed on the opening of the handle and connected with the chip module. The fixed optical The component is installed at the end of the lens barrel away from the chip module, and the adjustable optical component is mounted in the lens barrel to be axially movable; the adjustable optical component includes an adjustable lens seat and an adjustable lens The adjustable lens holder has a mounting hole, the adjustable lens group includes a plurality of optical lenses, and the plurality of optical lenses are sequentially installed in the mounting holes of the adjustable lens holder, and the adjacent optical lenses At least one spacer ring is installed between the lenses, the spacer ring has a through hole, the spacer ring is configured to allow the imaging light beam to pass through, and the inner surface of the spacer ring is a non-smooth diffuse reflection surface;

In one embodiment, an endoscopic camera is provided, which includes a lens barrel, a fixed optical component, and an adjustable optical component. One end of the lens barrel is mounted on the opening of the handle and is connected to the chip module. Connected, the fixed optical component is installed on the end of the lens barrel far away from the chip module, the adjustable optical component can be axially movably installed in the lens barrel; the adjustable optical component includes an adjustable A lens holder and an adjustable lens group, the adjustable lens holder has a mounting hole, the adjustable lens group includes a plurality of optical lenses, and the plurality of optical lenses are sequentially installed in the mounting holes of the adjustable lens seat, At least one spacer ring is installed between the adjacent optical lenses, the spacer ring has a through hole, and the shape of the through hole of the spacer ring matches the shape of the light beam passing through the through hole.

In one embodiment, an endoscopic camera is provided, including a lens barrel and an optical assembly, the optical assembly includes a plurality of optical lenses, and the plurality of optical lenses are sequentially installed in the mounting hole of the adjustable lens holder Inside, at least one spacer ring is installed between the adjacent optical lenses, the spacer ring has a through hole, and the shape of the through hole of the spacer ring matches the shape of the imaging beam emitted by the optical lens in front of it.

In one embodiment, an endoscopic camera system is provided, which includes a light source, a light guide, an endoscope, an optical bayonet, a communication cable, a camera host, a display, a video cable, and the aforementioned endoscopic camera, The light source is connected to the endoscope through the light guide, one end of the endoscope camera is connected to the endoscope through the optical bayonet, and the other end of the endoscope camera passes through the endoscope. A communication cable is connected to the camera host, and the camera host is connected to the display through the video connection cable.

The beneficial effects of the invention

Beneficial effect

According to the endoscopic camera and the endoscopic camera system of the above-mentioned embodiment, since a spacer is provided between adjacent optical lenses, and the shape of the through hole of the spacer matches the shape of the light beam passing through the through hole, In addition to the effective imaging beam, the optical lens also emits stray light. The stray light is composed of the light that enters the optical lens from the outside and the invalid light formed by multiple refraction. The spacer can be used to avoid the effective imaging beam. The axis of the spacer The end surface is blocked on the exit surface of the optical lens, which can prevent stray light from being mixed into the imaging beam, thereby improving the imaging quality.

Brief description of the drawings

Description of the drawings

Fig. 1 is a schematic structural diagram of an endoscopic camera system in an embodiment;

Figure 2 is a schematic diagram of the structure of an endoscope camera in an embodiment;

Fig. 3 is a schematic structural diagram of an adjustable optical component in an embodiment;

4 is a schematic diagram of the optical path of the adjustable optical component in an embodiment;

Fig. 5 is a schematic structural diagram of an adjustable optical component in an embodiment;

Fig. 6 is a schematic structural diagram of an adjustable optical component in an embodiment;

Fig. 7 is a schematic structural diagram of an adjustable optical component in an embodiment;

Fig. 8 is a schematic diagram of the structure of the endoscope camera in an embodiment.

Invention embodiment

Embodiments of the present invention

Among them, similar elements in different embodiments use related similar element numbers. In the following embodiments, many detailed descriptions are used to make this application better understood. However, those skilled in the art can easily realize that some of the features can be omitted under different circumstances, or can be replaced by other elements, materials, and methods. In some cases, some operations related to this application are not shown or described in the specification. This is to avoid the core part of this application being overwhelmed by excessive descriptions. For those skilled in the art, these are described in detail. Related operations are not necessary, they can fully understand the related operations based on the description in the manual and the general technical knowledge in the field.

In addition, the features, operations, or features described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be sequentially exchanged or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment, and are not meant to be a necessary sequence, unless it is specified that a certain sequence must be followed.

The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application include direct and indirect connection (connection) unless otherwise specified.

Hereinafter, the present invention will be further described in detail through specific embodiments in combination with the drawings, and it should be noted that.

As shown in FIG. 1, an embodiment provides an endoscopic camera system 1000. The endoscopic camera system 1000 includes a light source 10, a light guide 20, a rigid tube endoscope 30, an optical bayonet 40, and an endoscope The camera 50, the communication cable 81, the camera host 60, the display 70, and the video connection line 82. The camera host 60 is connected to the endoscope camera 50 through a communication cable 81, and the image signal obtained by the endoscope camera 50 is transmitted to the camera host 60 through the communication cable 81 for processing. In some embodiments, the communication cable 81 may be an optical communication cable, such as an optical fiber; the endoscope camera 50 converts the image signal (electric signal) into an optical signal, which is transmitted by the communication cable 81 to the camera host 60, and the camera The host 60 then converts the optical signal into an electrical signal. The camera host 60 is connected to the display 70 through a video connection line 82, and is used to send a video signal to the display 70 for display. Those skilled in the art should understand that FIG. 1 is only an example of the endoscopic camera system 1000, and does not constitute a limitation on the endoscopic camera system 1000. The endoscopic camera system 1000 may include more or Fewer components, or a combination of certain components, or different components, for example, the endoscopic camera system 1000 may also include a dilator, a smoke control device, an input/output device, a network access device, and the like.

The light source 10 is used to provide an illuminating light source for the part to be observed 100. The illuminating light source includes a visible light illuminating light source and a laser illuminating light source corresponding to a fluorescent reagent (for example, near-infrared light). The light source 10 includes, but is not limited to, a laser light source, an LED light source or a laser diode.

In this embodiment, the light source 10 includes a visible light source and a laser light source corresponding to a fluorescent reagent. The visible light source is an LED light source. In an embodiment, the visible light source can respectively provide multiple monochromatic lights in different wavelength ranges, such as blue light, green light, red light, and so on. In other embodiments, the visible light source may also provide a combined light of the plurality of monochromatic lights, or a wide-spectrum white light source. The wavelength range of the monochromatic light is approximately 400 nm to 700 nm. The laser light source is used to generate laser light. The laser is, for example, near infrared (Near Infrared; NIR). The peak wavelength of the laser light takes at least one value in the range of 780 nm or 808 nm.

Since the light source 10 can provide continuous visible light and laser light corresponding to the fluorescent reagent to the site to be observed at the same time, the collection efficiency of the visible light image signal and the fluorescent image signal reflected by the site to be observed 100 by the camera 50 is improved.

Among them, before the endoscopic camera system 1000 is used for imaging, a contrast agent, such as indocyanine green (ICG), is introduced into the area to be observed 100 by intravenous or subcutaneous injection, so that it is not easy to use standard visible light imaging technology. Imaging of the tissue structure and function (eg blood/lymph/bile in the vessel) seen. The site to be observed 100 includes, but is not limited to, blood circulatory system, lymphatic system, and tumor tissue. ICG is commonly known as indigocyanine green, diagnostic green needles, and indocyanine green. It is a contrast agent commonly used in clinical diagnosis of cardiovascular diseases and is widely used in choroidal and retinal vascular imaging. When the contrast agent in the area to be observed 100 absorbs the laser light generated by the laser light source and corresponds to the fluorescent agent, fluorescence can be generated.

An embodiment provides an endoscopic camera 50, and this application takes a rigid tube endoscopic camera as an example for description.

As shown in FIG. 2, the endoscopic camera 50 of this embodiment includes a handle 1, a chip module 2, an optical module 3 and a hand wheel 4.

The handle 1 has the functions of accommodating components and holding. The handle 1 has an accommodating cavity 11, both ends of the handle 1 have openings communicating with the accommodating cavity 11, and the openings at both ends of the handle 1 are used to connect communication cables 81 and Optical module 3. The handle 1 is equipped with a chip module 2 and a button assembly 12 is also installed on the handle 1. The button assembly 12 is connected to the chip module 2 through a cable. The doctor can hold the handle 1 and control the imaging detection of the endoscopic camera through the button assembly 12.

In other embodiments, the handle 1 is a wireless communication handle 1, the chip module 2 communicates with the camera host 60 wirelessly, the handle 1 is only provided with an opening at one end, and the opening of the handle is connected to the optical module 3.

In this embodiment, the chip module 2 includes components such as a sensor and a processor. The chip module 2 is used to convert optical signals into electrical signals, process the electrical signals and transmit them to the camera host 60 through the communication cable 81 for imaging.

One end of the optical module 3 is directly inserted into the accommodating cavity 11 of the handle 1 and connected to the chip module 2. One end of the optical module 3 can also be connected to the chip module 2 through the front cover, and the whole of the optical module 3 is located outside the accommodating cavity 11 of the handle 1.

The optical module 3 includes a lens barrel 31, a fixed optical assembly 32, an adjustable optical assembly 33, and an anti-collision terminal 34. One end of the lens barrel 31 is directly installed on the opening of the handle 1 away from the end of the communication cable 81 through the front cover or directly. The other end of the barrel 31 is connected to the optical bayonet 40. The fixed optical component 32 is fixedly installed on the end of the lens barrel 31 away from the chip module 2, and the adjustable optical component 33 can be axially movably installed in the lens barrel 31. The adjustable optical component 33 can move relative to the fixed optical component 32 to adjust Imaging focal length.

The hand wheel 4 is rotatably fitted on the lens barrel 31. The lens barrel 31 is provided with a spiral groove. The hand wheel 4 is connected to the adjustable optical component 33 in the lens barrel 31 through a connecting member such as a pin 41. In the spiral groove of the barrel 31, after the hand wheel 4 rotates, under the restriction of the spiral groove of the lens barrel 31, the hand wheel 4 and the adjustable optical assembly 33 will simultaneously rotate and move axially, so that the hand wheel 4 can be used for Adjust the axial movement of the adjustable optical assembly 33.

In this embodiment, the fixed optical component 32 includes a fixed lens seat 321 and a fixed lens component 322. The fixed lens seat 321 is fixed in the lens barrel 31 by a threaded connection. The fixed lens seat 321 has a ring structure, and the fixed lens seat 321 is a tube. The fixed lens assembly 322 includes two optical lenses. The two optical lenses are fixedly installed in the mounting holes in the two optical lenses, and the two axial mirrors of the fixed lens assembly 322 are connected to the fixed lenses. The two end surfaces of the seat 321 are flush.

As shown in FIG. 3, the adjustable optical assembly 33 includes an adjustable lens seat 331 and an adjustable lens assembly 332. The adjustable lens seat 331 is slidably installed in the lens barrel 31. The adjustable lens seat 331 is a cylindrical structure with A mounting hole coaxial with the fixed lens holder 321 and the lens barrel 31. The adjustable lens assembly 332 includes a first adjustable lens 3321, a second adjustable lens 3322 and a third adjustable lens 3323, a first spacer 3324 and a second spacer 3325, the first adjustable lens 3321, the second adjustable lens The lens 3322 and the third adjustable lens 3323 are installed in the lens barrel 31 away from the fixed optical assembly 32 in turn. The first spacer 3324 is installed between the first adjustable lens 3321 and the second adjustable lens 3322. The second spacer 3325 is installed between the second adjustable lens 3322 and the third adjustable lens 3323.

The materials of the first spacer 3324 and the second spacer 3325 are alloy materials such as aluminum alloy or copper alloy. The first spacer 3324 and the second spacer 3325 have good structural stability and are not easily deformed. After the camera is used for a long time, the first adjustable lens 3321, the second adjustable lens 3322, and the third adjustable lens 3323 always maintain the original distance.

The first spacer 3324 and the second spacer 3325 are subjected to surface matting and blackening treatment, and the matting and blackening treatment has the effect of eliminating the absorption of stray light. If the spacer is made of aluminum alloy material, the matting and blackening treatment on the surface of the spacer is black anodization; if the spacer is made of copper alloy material, the matting and blackening treatment on the surface of the spacer is vacuum sputtering. Different materials use different matting and blackening treatments, which can play a better matting effect.

In this embodiment, the inner surfaces of the first spacer 3324 and the second spacer 3325 are also configured as non-smooth diffuse reflection surfaces. For example, fine sand particles are provided on the inner surfaces of the first spacer 3324 and the second spacer 3325. , Threads or grooves, etc., so that the inner surfaces of the first spacer 3324 and the second spacer 3325 are non-smooth surfaces, and the non-smooth diffuse reflection surface can diffuse the light irradiated on the inner surface of the spacer. Can effectively eliminate stray light.

As shown in FIG. 4, the first adjustable lens 3321 has a concave surface in the middle of the incident surface facing the fixed optical component 32, the exit surface of the first adjustable lens 3321 is convex, and the first adjustable lens 3321 is used to parallel the incident surface. The light turns into diffused light and exits. The incident surface of the second adjustable lens 3322 facing the first adjustable lens 3321 is a flat surface, the exit surface of the second adjustable lens 3322 is a convex surface, and the second adjustable lens 3322 is used to convert diffused light into parallel light. The third adjustable lens 3323 is a cemented lens used to eliminate chromatic aberration. The cemented lens is also called an achromatic lens, which is formed by cementing two single lenses, and the performance of imaging in polychromatic (white light) is much higher than that of a single lens. The achromatic lens consists of two lenses of different materials glued together to correct the dispersion of the glass. The cemented lens is an achromatic lens made by bonding a low-dispersion crown glass positive lens and a high-dispersion flint glass negative lens. During the design, the three wavelengths of blue (486.1nm), green (546.1nm) and red (656.3nm) were optimized for different values of dispersion and lens shape to achieve the smallest chromatic aberration.

The first spacer 3324 has a tapered through hole 3324a. The tapered through hole 3324a matches the diffused light emitted by the first adjustable lens 3321. Along the exit direction of the first adjustable lens 3321, the cone of the first spacer 3324 The diameter of the through hole 3324a gradually expands, the entrance port at the front end of the first spacer 3324 is smaller than the exit port at the rear end, and the entrance port of the first spacer 3324 abuts on the exit surface of the first adjustable lens 3321. The entrance port of the tapered through hole 3324a of the first spacer 3324 is equal to the effective exit area of the exit surface of the first adjustable lens 3321, and the tapered through hole 3324a of the first spacer 3324 expands the angle and the first adjustable lens 3321 The expanded angle of the emitted diffused light is the same, and the inner wall of the tapered through hole 3324a is parallel to the boundary of the diffused light emitted by the first adjustable lens 3321. It should be noted that the “parallel” referred to here should be understood as allowing a slight deviation, and the inner wall of the tapered through hole 3324a and the boundary of the diffused light emitted by the first adjustable lens 3321 are substantially parallel to meet the requirements of use. The cone-shaped through hole 3324a is cone-shaped. The imaging beam emitted by the first adjustable lens 3321 is diffused light. The imaging beam is a cone-shaped beam. The cone-shaped through hole 3324a has the same shape as the imaging beam, so that the first spacer 3324 has a cone shape. The through hole 3324a can only allow effective diffused light to pass through. The effective exit area on the exit surface of the first adjustable lens 3321 is a circular area in the middle, and the annular area outside the circular area is an ineffective exit area. The annular area outside the circular area is defined by the axis of the first spacer 3324. To cover the annular end surface, preferably the annular area outside the circular area is all covered by the axial annular end surface of the first spacer 3324, so that the first spacer 3324 can block the output from the annular area of the first adjustable lens 3321 Stray light prevents stray light from being mixed into diffused light and ensures image quality.

The entrance port of the first spacer 3324 can also be slightly larger than the effective exit area of the exit surface of the first adjustable lens 3321, so that the volume of the tapered through hole 3324a is slightly larger than the volume of the cone beam formed by the diffused light, which can reduce the The machining accuracy of the inner wall of a spacer 3324 can also play a role in blocking stray light.

The emitted light of the second adjustable lens 3322 is parallel light, and the parallel light forms a cylindrical beam. The through hole of the second spacer 3325 is a cylindrical through hole that matches the second adjustable lens 3322. The second spacer 3325 is used for To avoid the parallel light emitted by the second adjustable lens 3322, the diameter of the through hole of the second spacer 3325 is slightly larger than the beam diameter of the parallel light emitted by the second adjustable lens 3322. The axial end of the second spacer 3325 also blocks the area outside the effective exit area of the second adjustable lens 3322. The second spacer 3325 can also block the stray light emitted by the second adjustable lens 3322. .

In this embodiment, in addition to the effective imaging beam, the optical lens also emits stray light. The stray light is composed of the light that enters the optical lens from outside and the invalid light formed by multiple refraction. The stray light is emitted from the first adjustable lens 3321. The ring-shaped area is injected and emitted from the area outside the effective emission area of the first adjustable lens 3321. Similarly, stray light enters from an area other than the effective incident area on the incident surface of the second tunable lens 3322, and is emitted from an area other than the effective exit area on the exit surface. The shape of the through holes of the first spacer 3324 and the second spacer 3325 are consistent with the shape of the light beam passing through it. The spacer is set to allow the imaging beam emitted by the front optical lens to pass through, that is, it does not block the imaging beam emitted from the front optical lens. , To ensure that the effective imaging light path is unobstructed, and the axial end surface of the spacer is blocked on the exit surface of the optical lens, which can prevent stray light from mixing into the imaging beam.

The first spacer 3324 and the second spacer 3325 respectively have a preset thickness. The first spacer 3324 and the second spacer 3325 are used to connect the first adjustable lens 3321, the second adjustable lens 3322, and the third adjustable lens. The lenses 3323 are separated by a predetermined distance, so that the first adjustable lens 3321, the second adjustable lens 3322, and the third adjustable lens 3323 form a beam expander with a certain magnification ratio.

In other embodiments, the adjustable lens assembly 332 may include two, four, or other numbers of optical lenses, with spacers installed between adjacent optical lenses, or directly bonded together. For example, the adjustable lens assembly 332 includes two optical lenses, a first adjustable lens 3321 and a second adjustable lens 3322. A first spacer 3324 is installed between the first adjustable lens 3321 and the second adjustable lens 3322. The first tunable lens 3321 has a concave surface in the middle of the incident surface facing the fixed optical component 32. The exit surface of the first tunable lens 3321 is convex. The first tunable lens 3321 is used to convert the incident parallel light into diffused light and emit it. . The incident surface of the second adjustable lens 3322 facing the first adjustable lens 3321 is a flat surface, the exit surface of the second adjustable lens 3322 is a convex surface, and the second adjustable lens 3322 is used to convert diffused light into parallel light. The first spacer 3324 has a tapered through hole 3324a. The tapered through hole 3324a matches the diffused light emitted by the first adjustable lens 3321. The first adjustable lens 3321 is used to prevent the diffused light emitted by the first adjustable lens 3321 from and Block the stray light from the first adjustable lens 3321.

In other embodiments, the adjustable lens assembly 332 includes two or more optical lenses for emitting diffused light, and a corresponding belt is connected to the exit surface of each optical lens for emitting diffused light. The spacer ring of the tapered through hole makes all the stray light emitted by the optical lens used for emitting diffused light to be blocked by the spacer ring to improve the image quality.

In one embodiment, an endoscopic camera 50 is provided. The difference from the above-mentioned embodiment is that an anti-collision terminal is added.

As shown in Figure 5, in this embodiment, the first adjustable lens 3321 and the second adjustable lens 3322 are convex lenses, the third adjustable lens 3323 is a cemented lens, and the first adjustable lens 3321 faces the fixed optical component 32. The mirror surface includes a concave surface located in the middle and an annular plane located around the concave surface. The annular plane is flush with the end surface of the adjustable lens holder 331 so that the first adjustable lens 3321 can abut against the lens of the fixed lens assembly 322. The end of the third adjustable lens 3323 away from the fixed optical component 32 protrudes from the end surface of the lens barrel 31.

The adjustable lens seat 331 has an annular protrusion at one end away from the fixed optical component 32, and an external thread is provided on the annular protrusion. The anti-collision terminal 34 is a sleeve structure with elasticity, such as a rubber ring. The anti-collision terminal 34 has an internal thread. The anti-collision terminal 34 is fixed on the annular protrusion of the adjustable lens seat 331 through a screw connection, and the anti-collision terminal 34 The end away from the adjustable lens seat 331 protrudes from the mirror surface of the third adjustable lens 3323, and the part of the third adjustable lens 3323 protruding from the adjustable lens seat 331 is located in the anti-collision terminal 34, so that during the installation process, the entire When the adjustable optical component 33 is installed in the lens barrel 31 and collides with the chip module 2, the anti-collision terminal 34 collides with the chip module 2 directly, avoiding the movement of the lens caused by the collision of the third adjustable lens 3323 with the chip module 2 And breakage.

In other embodiments, the end of the third adjustable lens 3323 can also be set to be flush with the end of the adjustable lens seat 33.

In other embodiments, the anti-collision terminal 34 can be fixed on the adjustable lens holder 331 by means of clamping or bonding; the anti-collision terminal 34 can also be an integral structure with the adjustable lens holder 331; the adjustable lens holder 331 The end surface away from the fixed optical component 32 can also be provided with an annular groove, and the anti-collision terminal 34 is clamped in the annular groove of the adjustable lens seat 331.

As shown in FIG. 6, in other embodiments, the anti-collision terminal 34 includes a plurality of elastic bumps 36, and the plurality of bumps 36 are uniformly adhered to the annular end surface of the adjustable lens holder 331 away from the fixed optical component 32, The bump 36 has a sufficient axial thickness. The bump 36 protrudes from the third adjustable lens 3323, and the bump 36 can also function as an anti-collision.

As shown in FIG. 7, in other embodiments, the anti-collision terminal 34 can also be installed on the inner wall of the end of the lens barrel 31 far away from the anti-collision terminal 34. The anti-collision terminal 34 is located outside the adjustment stroke of the adjustable optical assembly 33, and the anti-collision terminal 34 Under the condition that the bumping terminal 34 does not affect the adjustment of the adjustable optical assembly 33, the adjustable optical assembly 33 is blocked, and the collision of the adjustable optical assembly 33 and the chip module 2 is prevented.

As shown in FIG. 8, in an embodiment, an endoscopic camera is provided. On the basis of the above-mentioned embodiment, the anti-collision terminal 34 is improved. The anti-collision terminal 34 is provided with a stopper at one end away from the fixed optical component 32. The ring 34a and the stop ring 34a have a certain inner circle. The inner edge of the stop ring 34a is equal to or slightly larger than the edge of the light path emitted by the third adjustable lens 3323. The inner diameter of the stop ring 34a is slightly larger than that of the third adjustable lens 3323. The beam diameter of the emitted light does not affect the imaging of the camera, and blocks the area outside the optical path of the third adjustable lens 3323, prevents stray light from entering the chip module 2, and improves the imaging quality.

In one embodiment, an endoscopic camera 50 is provided. The difference from the above-mentioned embodiment is that the inner surface of the anti-collision terminal 34 is configured as a diffuse reflection surface.

In this embodiment, the inner surface of the anti-collision terminal 34 is set as a non-smooth diffuse reflection surface, for example, fine sand particles are sprayed on the inner surface of the anti-collision terminal 34 to form a frosted surface, or the inner surface is provided with threads or recesses. The inner surface of the anti-collision terminal 34 is processed into a rough surface with diffuse reflection effect. The rough surface can diffusely reflect the stray light entering into the anti-collision terminal 34, avoiding the stray light from again coming from the anti-collision terminal 34. Projected.

In this embodiment, the through hole of the anti-collision terminal 34 does not block the imaging light path, which can prevent the entry of stray light and the emission of stray light, which further improves the imaging quality.

In one embodiment, an endoscopic camera 50 is provided. The difference from the foregoing embodiment is that the optical module of the endoscopic camera in this embodiment cannot adjust the focal length, and all optical lenses are fixedly installed. It is specifically embodied as: the adjustable lens holder 331 is fixedly connected to the lens barrel 31.

In this embodiment, the handle 1 has the functions of accommodating components and holding. The handle 1 has an accommodating cavity 11, both ends of the handle 1 have openings communicating with the accommodating cavity 11, and the openings at both ends of the handle 1 are respectively used for connection Communication cable 81 and optical module 3. The handle 1 is equipped with a chip module 2 and a button assembly 12 is also installed on the handle 1. The button assembly 12 is connected to the chip module 2 through a cable. The doctor can hold the handle 1 and control the imaging detection of the endoscopic camera through the button assembly 12.

The chip module 2 includes components such as a sensor and a processor. The chip module 2 is used to convert optical signals into electrical signals, process the electrical signals, and transmit them to the camera host 60 through the communication cable 81 for imaging.

The optical module 3 includes a lens barrel 31, a fixed optical assembly 32, an adjustable optical assembly 33, and an anti-collision terminal 34. One end of the lens barrel 31 is directly installed on the opening of the handle 1 away from the end of the communication cable 81 through the front cover or directly. The other end of the barrel 31 is connected to the optical bayonet 40. The fixed optical assembly 32 and the adjustable optical assembly 33 are installed in the lens barrel 31. The adjustable optical assembly 33 is fixed in the lens barrel 31 by screws or pins. The adjustable optical assembly 33 is an adjustable installation. After installation, the adjustable optics The assembly 33 is not movable. If the installation position needs to be adjusted, the screw or pin needs to be unlocked, the movable adjustable optical assembly 33 is unlocked and then fixed and locked to achieve adjustable installation.

In one embodiment, an endoscopic camera 50 is provided. The difference from the above-mentioned embodiment is that the optical lens is directly installed and fixed in the lens barrel.

In this embodiment, the endoscopic camera 50 is a camera with a fixed focal length. The endoscopic camera includes a lens barrel and an optical component. The optical component includes a number of optical lenses and spacers. The optical lenses include diffused light and parallel light. The exit surface of the optical lens is connected with at least one spacer with a through hole. The through hole of the spacer avoids effective imaging beams. The shape of the through hole of the spacer is consistent with the shape of the light beam passing through it. The axial end surface barrier is on the exit surface of the optical lens, which can prevent stray light from being mixed into the imaging beam to improve the imaging quality.

The above uses specific examples to illustrate the present invention, which are only used to help understand the present invention, and are not used to limit the present invention. For those of ordinary skill in the art, according to the idea of the present invention, the above-mentioned specific embodiments can be changed.

Claims

An endoscope camera, which is characterized in that it comprises:

A handle, the handle has an accommodating cavity, and one end of the handle has an opening communicating with the accommodating cavity;

A chip module, the chip module being installed in the accommodating cavity of the handle;

The optical module includes a lens barrel, a fixed optical component, and an adjustable optical component. One end of the lens barrel is installed on the opening of the handle and connected with the chip module. The fixed optical The component is installed at the end of the lens barrel away from the chip module, and the adjustable optical component is mounted in the lens barrel to be axially movable; the adjustable optical component includes an adjustable lens seat and an adjustable lens The adjustable lens holder has a mounting hole, the adjustable lens group includes a plurality of optical lenses, and the plurality of optical lenses are sequentially installed in the mounting holes of the adjustable lens holder, and the adjacent optical lenses At least one spacer ring is installed between the lenses, the spacer ring has a through hole, and the shape of the through hole of the spacer ring matches the shape of the imaging beam emitted by the optical lens in front of it;

And a hand wheel, the hand wheel is rotatably sleeved on the lens barrel, and is connected with the adjustable optical assembly through a connecting piece.
5. The endoscopic camera head of claim 1, wherein the inner wall of the through hole of the spacer is parallel to the boundary of the light beam passing through the through hole.
8. The endoscopic camera according to claim 1, wherein the spacer is configured to allow the imaging beam to pass through.
5. The endoscopic camera head according to claim 1, wherein the spacer ring has a cylindrical structure, and the through hole is provided on the spacer ring along the axial direction.
The endoscopic camera according to claim 1, wherein the exit surface of the optical lens has an effective exit area, and the axial end surface of the spacer covers an area other than the effective exit area of the optical lens .
5. The endoscopic camera head of claim 5, wherein the axial end surface of the spacer covers all areas other than the effective exit area of the optical lens.
The endoscopic camera according to claim 6, wherein at least one of the plurality of optical lenses is used to emit diffused light, the diffused light forms a cone beam, and the cone beam passes through the The through hole of the spacer is a tapered through hole, and the expanding direction of the tapered through hole is consistent with the expanding direction of the cone beam.
The endoscopic camera according to claim 6, wherein at least one of the plurality of optical lenses is used to emit parallel light, the parallel light forms a cylindrical light beam, and the cylindrical light beam passes through the The through hole of the spacer is a cylindrical through hole.
The endoscopic camera according to any one of claims 1 to 8, wherein the adjustable lens group includes a first adjustable lens, a second adjustable lens, and a third adjustable lens, and the first adjustable lens An adjustable lens, a second adjustable lens, and a third adjustable lens are arranged in the mounting hole of the adjustable lens holder that are sequentially away from the fixed optical assembly, and the spacer includes a first spacer and a second spacer. The first spacer ring is installed between the first adjustable lens and the second adjustable lens, and the second spacer ring is installed between the second adjustable lens and the third adjustable lens.
9. The endoscopic camera head of claim 9, wherein the first adjustable lens is used to emit diffused light, and the through hole of the first spacer is a tapered through hole.
The endoscope camera according to claim 8 or 10, wherein the second adjustable lens is used to emit parallel light, and the through hole of the second spacer is a cylindrical through hole.
8. The endoscopic camera according to claim 8, wherein the end surface of the first adjustable lens facing the fixed optical component is flush with the end surface of the adjustable lens holder, and the third adjustable lens The end surface away from the fixed optical component protrudes from the end surface of the adjustable lens seat.
The endoscopic camera head according to any one of claims 1 to 12, wherein the spacer ring has undergone a surface matting and blackening treatment.
The endoscopic camera head according to claim 13, wherein the material of the spacer ring is aluminum alloy or copper alloy.
The endoscopic camera according to claim 14, wherein the material of the spacer is aluminum alloy, and the surface matting and blackening treatment is black anodization; or, the material of the spacer is a copper alloy, The surface matting and blackening treatment is vacuum sputtering.
The endoscopic camera according to any one of claims 1 to 15, wherein the inner surface of the spacer is a non-smooth diffuse reflection surface.
The endoscopic camera head of claim 16, wherein the inner surface of the spacer ring is provided with fine sand particles, threads or grooves.
The endoscopic camera according to any one of claims 1 to 17, wherein the optical module further comprises an anti-collision terminal, and the anti-collision terminal is installed on the adjustable lens seat away from the fixed At one end of the optical component, the anti-collision terminal axially protrudes from the axial end surface of the adjustable lens group.
18. The endoscopic camera head of claim 18, wherein an end of the adjustable lens group away from the fixed optical component protrudes from or is flush with the end surface of the adjustable lens seat.
The endoscopic camera head of claim 19, wherein the anti-collision terminal is an elastic member.
The endoscopic camera according to any one of claims 18 to 20, wherein the anti-collision terminal is a sleeve.
The endoscopic camera according to claim 21, wherein the end of the anti-collision terminal away from the fixed optical assembly is provided with a stop ring, and the inner circle diameter of the stop ring is greater than or equal to the adjustable lens group The beam diameter of the emitted light.
The endoscopic camera head according to claim 21, wherein the end of the adjustable lens holder away from the fixed optical component has an axial annular protrusion or annular groove, and one end of the anti-collision terminal is sleeved On the annular protrusion of the adjustable lens seat, or clamped in the annular groove of the adjustable lens seat.
22. The endoscopic camera head of claim 21, wherein the anti-collision terminal and the adjustable lens holder are an integral structure.
The endoscopic camera according to claim 18, wherein the anti-collision terminal includes a plurality of bumps, and the plurality of bumps are evenly installed on the end surface of the adjustable lens seat away from the fixed optical component on.
An endoscope camera, which is characterized in that it comprises:

A handle, the handle has an accommodating cavity, and one end of the handle has an opening communicating with the accommodating cavity;

A chip module, the chip module being installed in the accommodating cavity of the handle;

The optical module includes a lens barrel, a fixed optical component, and an adjustable optical component. One end of the lens barrel is installed on the opening of the handle and connected with the chip module. The fixed optical The component is installed at the end of the lens barrel away from the chip module, and the adjustable optical component is mounted in the lens barrel to be axially movable; the adjustable optical component includes an adjustable lens seat and an adjustable lens The adjustable lens holder has a mounting hole, the adjustable lens group includes a plurality of optical lenses, and the plurality of optical lenses are sequentially installed in the mounting holes of the adjustable lens holder, and the adjacent optical lenses At least one spacer ring is installed between the lenses, the spacer ring has a through hole, the spacer ring is configured to allow the imaging light beam to pass through, and the inner surface of the spacer ring is a non-smooth diffuse reflection surface;

And a hand wheel, the hand wheel is rotatably sleeved on the lens barrel, and is connected with the adjustable optical assembly through a connecting piece.
The endoscopic camera head of claim 26, wherein the inner surface of the spacer ring is provided with fine sand particles, threads or grooves.
The endoscopic camera head of claim 26, wherein the inner wall of the through hole of the spacer is parallel to the boundary of the light beam passing through the through hole.
The endoscopic camera according to claim 26, wherein the spacer is configured to allow the imaging beam to pass through.
The endoscopic camera according to claim 26, wherein the exit surface of the optical lens has an effective exit area, and the axial end surface of the spacer covers an area other than the effective exit area of the optical lens .
The endoscopic camera of claim 30, wherein at least one of the plurality of optical lenses is used to emit diffused light, the diffused light forms a cone beam, and the cone beam passes through the The through hole of the spacer is a tapered through hole, and the expanding direction of the tapered through hole is consistent with the expanding direction of the cone beam.
An endoscope camera head, which is characterized in that it comprises a lens barrel, a fixed optical component and an adjustable optical component. One end of the lens barrel is installed on the opening of the handle and connected with the chip module. The fixed optical component is installed at the end of the lens barrel far away from the chip module, and the adjustable optical component is installed in the lens barrel to be axially movable; the adjustable lens group includes a plurality of optical lenses, so The plurality of optical lenses are sequentially installed in the mounting holes of the adjustable lens holder, at least one spacer ring is installed between the adjacent optical lenses, the spacer ring has a through hole, and the through hole of the spacer ring Its shape matches the shape of the imaging beam emitted by the optical lens in front of it.
The endoscopic camera according to claim 32, wherein the inner wall of the through hole of the spacer is parallel to the boundary of the light beam passing through the through hole.
The endoscopic camera according to claim 32, wherein the spacer is configured to allow the imaging light beam to pass through.
The endoscopic camera according to claim 32, wherein the exit surface of the optical lens has an effective exit area, and the axial end surface of the spacer covers an area other than the effective exit area of the optical lens .
The endoscopic camera according to claim 35, wherein at least one of the plurality of optical lenses is used to emit diffused light, the diffused light forms a cone beam, and the cone beam passes through the The through hole of the spacer is a tapered through hole, and the expanding direction of the tapered through hole is consistent with the expanding direction of the cone beam.
The endoscopic camera according to claim 36, wherein the inner surface of the spacer is a non-smooth diffuse reflection surface.
An endoscope camera head, which is characterized by comprising a lens barrel and an optical assembly. The optical assembly includes a plurality of optical lenses. The plurality of optical lenses are sequentially installed in the mounting hole of the adjustable lens holder, adjacent to each other. At least one spacer ring is installed between the optical lenses, the spacer ring has a through hole, and the shape of the through hole of the spacer ring matches the shape of the imaging beam emitted by the optical lens in front of it.
The endoscope camera according to claim 38, wherein the inner wall of the through hole of the spacer is parallel to the boundary of the light beam passing through the through hole.
The endoscope camera according to claim 38, wherein the spacer is configured to allow the imaging light beam to pass through.
The endoscopic camera according to claim 38, wherein the exit surface of the optical lens has an effective exit area, and the axial end surface of the spacer covers an area other than the effective exit area of the optical lens .
The endoscopic camera according to claim 41, wherein at least one of the plurality of optical lenses is used to emit diffused light, the diffused light forms a cone beam, and the cone beam passes through the The through hole of the spacer is a tapered through hole, and the expanding direction of the tapered through hole is consistent with the expanding direction of the cone beam.
The endoscopic camera according to claim 38, wherein the inner surface of the spacer is a non-smooth diffuse reflection surface.
An endoscope camera system, which is characterized by comprising a light source, a light guide, an endoscope, an optical bayonet, a communication cable, a camera host, a display, a video connection line and any one of claims 1 to 43 In the endoscope camera, the light source is connected to the endoscope through the light guide, one end of the endoscope camera is connected to the endoscope through the optical bayonet, and the endoscope The other end of the camera is connected to the camera host through the communication cable, and the camera host is connected to the display through the video cable.