CN107765418B - Medical electronic endoscope with built-in light source - Google Patents
Medical electronic endoscope with built-in light source Download PDFInfo
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- CN107765418B CN107765418B CN201710906832.3A CN201710906832A CN107765418B CN 107765418 B CN107765418 B CN 107765418B CN 201710906832 A CN201710906832 A CN 201710906832A CN 107765418 B CN107765418 B CN 107765418B
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- electronic endoscope
- imaging lens
- medical electronic
- imaging
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2407—Optical details
- G02B23/2461—Illumination
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2476—Non-optical details, e.g. housings, mountings, supports
- G02B23/2484—Arrangements in relation to a camera or imaging device
Abstract
A medical electronic endoscope with a built-in light source, the endoscope is tubular, and the front end of the endoscope is provided with a photoelectric conversion unit and an illumination unit, wherein: the photoelectric conversion unit is used for converting optical signals collected through the imaging window and the imaging lens into electric signals of static images and/or videos; the light emitted by the lighting unit uniformly illuminates a target area pointed by the endoscope through a lighting window arranged at the front end of the medical electronic endoscope and the imaging window in parallel; the rear end of an imaging lens barrel of the imaging lens is designed to be a full round angle, and the photoelectric conversion unit and the imaging lens are physically isolated by combining the optical filter, so that the electrical safety of the endoscope in use is improved. The endoscope system has the advantages of small volume, convenient operation, clear imaging, good electrical safety, support for high-temperature and high-pressure disinfection and reduction of use cost.
Description
Technical Field
The invention belongs to the technical field of hard tube endoscopes, and particularly relates to a medical electronic endoscope with a built-in light source.
Background
The medical endoscope enters a closed environment in a human body through a natural channel or a minimally invasive incision, a light source is required to illuminate and image tissues in the human body, and a surgeon performs corresponding operation through a display screen. The endoscope illumination quality, the imaging quality, the convenience degree of operation and the stable performance of the system have important influence on the success rate of the operation, particularly the complex operation.
First, the quality of the illumination of the light source is an important factor affecting the performance of the speculum. Most of the existing endoscopes adopt an external medical cold light source, usually a halogen lamp, which filters most of infrared spectrum through an infrared filter and then transmits the infrared spectrum to the endoscope head end through a long section of optical fiber bundle. Such external light sources have several significant disadvantages: (1) the external light source has high power and low photoelectric conversion efficiency, most of input electric power is converted into heat energy, and the noise of a light source host is high due to heat dissipation; (2) the external light source needs to occupy a certain space of an operating room, and is a burden for the operating room with a smaller space; (3) because an optical fiber bundle is needed to transmit at the back of the endoscope held by a doctor, the inconvenience of operation is increased, the optical fiber bundle is easy to damage due to a slightly larger bending angle, illumination attenuation and even failure are caused, and the burden of the doctor on operation is increased.
Secondly, the transmission mode of the endoscope image is another important factor affecting the imaging quality. The conventional optical lens performs optical signal transmission through a plurality of relay lenses (generally rod lenses), and the transmission mode has obvious defects: (1) the difficulty and the cost of manufacturing the endoscope are obviously improved due to the high-precision assembly of dozens of relay lenses; (2) the light signal is refracted and reflected for many times in the relay lens, so that the attenuation of the signal light intensity is inevitable, the stray light is obviously increased, the signal to noise ratio of the system is reduced, and the imaging quality is reduced.
Moreover, in order to ensure the assembly precision of the imaging lens, the imaging lens needs to be strictly limited through the front end of the lens tube, and charges conducted between the lens tube and the imaging lens are conducted. The medical endoscope requires that the lens has the characteristics of large field angle and large depth of field, and the back intercept of the lens can be very short according to geometric optics, which means that the back end of the lens barrel is very close to the image sensor and the PCB thereof. When the electrotome works, current leakage exists, static electricity exists on the lens cone, and if the charges break down and flow onto a circuit board of the image sensor, the PCB of the image sensor is abnormal in function and even damaged, and the design of electrostatic isolation has important influence on the performance stability of the endoscope.
Finally, existing endoscopes are not widely available in hospitals, a significant reason for which is the high cost of use of the endoscope. If the endoscope tube supports high-temperature and high-pressure disinfection, the endoscope tube can be repeatedly used for a plurality of times, so that the use cost of the endoscope can be greatly reduced. The adhesive fixes part of optical elements and mechanical modules in the lens cone, and seals the endoscope tube to form a closed space, wherein the thermal stability and the bonding strength of the selected adhesive directly determine the service life of the endoscope.
Disclosure of Invention
In view of the above technical problems, it is a primary object of the present invention to provide a medical electronic endoscope with a built-in light source, which is intended to at least partially solve the above technical problems.
In order to achieve the above object, the present invention provides a medical electronic endoscope having a built-in light source, the medical electronic endoscope being tubular, wherein a photoelectric conversion unit and an illumination unit are provided at a distal end of the medical electronic endoscope:
the photoelectric conversion unit is positioned in the medical electronic endoscope and used for converting optical signals collected through the imaging window and the imaging lens into electric signals of static images and/or videos;
an illumination unit which is positioned inside the medical electronic endoscope and is arranged in parallel with the photoelectric conversion unit relative to the central axis of the medical electronic endoscope; and the light emitted by the lighting unit uniformly illuminates a target area pointed by the medical electronic endoscope through a lighting window arranged at the front end of the medical electronic endoscope and an imaging window in parallel.
The lighting unit comprises a miniature patch type LED light source.
The substrate of the miniature patch type LED light source is made of aluminum nitride, beryllium oxide or copper-carbon fiber materials, and the heat conductivity coefficient is greater than 260W/(m.K).
Wherein a spacer for blocking light is disposed between the illumination unit and the photoelectric conversion unit.
The lighting window and the imaging window both adopt glass with the light transmittance of more than or equal to 98 percent, the hardness of more than or equal to 7 and no aluminum as a substrate;
preferably, the illumination window is a half-moon shaped structure.
Preferably, the micro patch type LED light source is arranged at a position 0.5-2mm away from the rear side of the lighting window.
Wherein, the imaging lens is arranged in an imaging lens barrel, and the imaging lens barrel adopts a thermal expansion coefficient less than or equal to 18 multiplied by 106A metal material with the tensile strength of more than or equal to 230 MPa;
preferably, an inner wall of the imaging lens barrel is black.
The imaging lens barrel is fixed in a lens tube of the medical electronic endoscope through a lens base, and the lens base is made of polyether-ether-ketone materials;
the photoelectric conversion unit is arranged on a blue glass sheet, a non-photosensitive area of the blue glass sheet is adhered to the lens base through an adhesive, and a semi-enclosed structure is formed through the low conductivity of the blue glass sheet and the lens base to isolate the photoelectric conversion unit from the imaging lens cone;
preferably, the rear end edge of the imaging lens barrel is formed as a full round angle, and the front end edge is formed as a right angle.
The front end of the photosensitive element of the photoelectric conversion unit is provided with an infrared cut-off filter for filtering light.
The imaging lens comprises a plurality of optical lenses, and the optical lenses are made of optical glass.
Wherein, part of elements in the medical electronic endoscope are fixed by an adhesive, and the adhesive is medical epoxy resin which can resist the high temperature of 134 ℃, has the shrinkage rate of less than or equal to 0.1 percent and has the shearing strength of the bonding surface of more than or equal to 12 MPa;
preferably, the epoxy resin is a biphenyl type epoxy resin, and silica nanoparticles are added into an epoxy resin system.
Based on the technical scheme, compared with the prior art, the medical electronic endoscope has the following beneficial effects:
(1) the LED light source appropriately heats the window sheet at the front end of the lens tube to prevent the window sheet from being atomized, and the LED light source is internally provided with a light guide plate without a fragile optical fiber, so that the LED light source has the advantages of small volume, low power, convenience in operation, uniform illumination light distribution and low power consumption;
(2) the built-in image sensor chip does not need dozens of relay lenses for image transmission, so that the attenuation of signal light intensity and the generation of stray light are inhibited, the installation and the adjustment are simple, and the imaging is clear;
(3) the image sensor and the PCB thereof are subjected to electrostatic shielding design, so that the electrical safety of the endoscope is improved;
(4) the endoscope tube is sealed by medical-grade high-temperature-resistant and high-adhesion-strength epoxy resin, so that the stability of the endoscope system during high-temperature and high-pressure sterilization is ensured, and the endoscope system is reused;
(5) is convenient to use.
Drawings
Fig. 1 is a schematic longitudinal sectional configuration diagram of a medical electronic endoscope with a built-in light source according to the present invention.
FIG. 2 is a schematic view showing the arrangement of components at the front end of a medical electronic endoscope tube with a built-in light source according to the present invention;
fig. 3 is a schematic view of the structure of the imaging lens barrel and the lens holder of the medical electronic endoscope with the built-in light source according to the present invention.
In the above figures, the reference numerals have the following meanings:
1 Lighting Unit
2 mirror tube
3 imaging lens
4 imaging window
5 imaging lens base
6 Heat sink
7 Cable
8 miniature SMD LED light source
9 Lighting Window
10 Barrier
11 substrate
12 PCB board
13 photosensitive element
14 blue glass sheet/infrared cut-off filter
15 imaging lens barrel
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.
The invention discloses a medical electronic endoscope with a built-in light source, which is in a thin-wall thin tube shape, and the front end of the endoscope is provided with a photoelectric conversion unit and an illumination unit: the illumination unit is arranged in the tube wall of the endoscope tube and is parallel to the photoelectric conversion unit relative to the central axis of the endoscope tube, and light emitted by the illumination unit uniformly illuminates a target area through an illumination window arranged at the front end of the endoscope and the imaging window side by side; the front end of the imaging lens is close to the imaging window, and the rear end of the imaging lens is fixed on the inner wall of the lens tube; and the photoelectric conversion unit is positioned behind the imaging lens and used for converting the optical signals collected through the imaging window and the imaging lens into electric signals of static images and/or videos.
The lighting unit comprises a miniature patch type LED light source. The number of the micro patch type LED light sources is not limited to 1, and may be set according to the spatial position and the specific requirement, for example, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, and 24. The substrate of the miniature patch type LED light source is made of aluminum nitride, beryllium oxide or copper-carbon fiber materials, and the heat conductivity coefficient is greater than 260W/(m.K). Preferably, the substrate of the miniature patch type LED light source is directly fixed on the heat sink and/or the heat pipe so as to enhance heat dissipation. The heat sink and the heat pipe are both made of high heat conduction metal.
The front end of the lighting unit is provided with a lighting window, the window is of a half-moon-shaped structure for example, and glass with the light transmittance of more than or equal to 98 percent, the hardness of more than or equal to 7 and containing no aluminum can be used as a substrate.
A spacer for blocking light rays is arranged between the illumination window of the illumination unit and the imaging lens, so that light of the LED light source is prevented from directly entering the imaging lens to become stray light and reduce the imaging quality of the lens.
Wherein, the distance between the lighting unit and the lighting window is 0.2-3mm, preferably 0.5-2mm, and the LED light source properly heats the window glass slide to play a role in preventing atomization.
In one embodiment, the imaging lens of the present invention is disposed in an imaging lens barrel, for example, the imaging lens barrel has a thermal expansion coefficient less than or equal to 18 × 10-6The lens barrel is made of metal materials with tensile strength of more than or equal to 230MPa, so that the assembly precision and stability of the precision optical lens are guaranteed, and the inner wall of the lens barrel is required to be blackened to prevent light rays from reflecting on the inner wall of the barrel for multiple times to influence the imaging effect.
Wherein, the imaging lens cone is fixed in the lens tube of the endoscope through a lens base, and the lens base adopts the volume resistance of 1015The plastic material with the order of magnitude of omega cm, good biocompatibility and 134 ℃ cyclic autoclaving resistance can be prepared by adopting materials such as Polyetheretherketone (PEEK), Polyformaldehyde (POM) and the like, so that the leakage current generated when the electrotome works can be prevented from directly flowing onto a PCB of the photoelectric conversion unit, and the function of the PCB is abnormal or even the PCB is damaged.
The photoelectric conversion unit can be arranged on or behind a blue glass sheet, the non-photosensitive area of the blue glass sheet is adhered on the lens base through an adhesive, and a semi-surrounding structure is formed by utilizing the low conductivity of the blue glass sheet to increase the electrostatic creepage distance, namely the blue glass sheet and the lens base form the semi-surrounding structure, so that the photoelectric conversion unit is further isolated from the rear end of the imaging lens cone which is possibly charged with static electricity.
Preferably, the rear end of the imaging lens barrel is set to be a full round angle with small charge density, and the front end of the imaging lens barrel is set to be a right angle with high charge density and easy static electricity discharge, so that the distribution situation of charges is improved, and the abnormal function of a PCB (printed circuit board) of the photoelectric conversion unit caused by air breakdown possibly occurring between the rear end of the lens barrel and an image sensor is avoided.
Wherein, the front end of the photosensitive element of the photoelectric conversion unit is provided with an infrared cut-off filter for filtering. The photosensitive element is, for example, an image sensor chip.
The optical lenses in the imaging lens are all made of optical glass, and optical plastics are not used for high-temperature sterilization.
In one embodiment, the matching of the optical and mechanical structures in the imaging lens and the fixing of the window closing the endoscope tube are all made by using an adhesive which is an epoxy resin with small medical grade contractibility and high temperature resistance.
Wherein the adhesive is medical-grade epoxy resin which can resist the high temperature of 134 ℃, has the shrinkage rate of less than or equal to 0.1 percent and the shear strength of the bonding surface of more than or equal to 12 MPa. Preferably, the epoxy resin is a biphenyl type epoxy resin, and silica nanoparticles are added to the epoxy resin system to improve the thermal stability of the epoxy resin adhesive.
The technical solutions of the medical electronic endoscope with built-in light source according to the present invention will be further explained with reference to fig. 1-3 by some specific embodiments.
Example 1: lighting unit
As shown in fig. 1, the present embodiment describes in detail an illumination unit 1 of the present invention, the medical electronic endoscope of the present invention is tubular, the illumination unit 1 is disposed in a tube 2 of the medical electronic endoscope and is disposed parallel to a central axis of an imaging lens 3 with respect to the tube 2, and light emitted from a light source illuminates a target region targeted by the medical electronic endoscope uniformly through an illumination window 9.
As shown in FIG. 2, the illumination window 9 is a half-moon structure, and the illumination unit 1 is located at one side of the imaging window 4, so that the imaging window 4 is in an eccentric design, and the tube inner space with the inner diameter less than or equal to 10mm is fully utilized.
The lighting window 9 adopts glass with the light transmittance of more than or equal to 98 percent and without aluminum as a substrate, such as fused quartz, so as to ensure that the film layer has high adhesive force on the glass substrate, and the film layer can be subjected to a circulating high-pressure sterilization and disinfection process. The outer surface of the lens facing the illumination area is plated with an anti-reflection film, the surface of the anti-reflection film is plated with a superhard anti-fouling film, and the other surface of the illumination window 9 is plated with an anti-reflection film, so that the light energy utilization rate of the LED light source is improved, and the possible scratches on the outer surface of the illumination window in the cleaning and disinfection process are avoided.
A barrier 10 for blocking light is arranged between the illumination unit 1 and the imaging unit, so that light emitted by the illumination unit 1 is prevented from entering the imaging lens 3 of the imaging unit without passing through the imaging window 4, and the stray light is prevented from reducing the imaging quality of the lens.
The substrate 11 of the miniature patch type LED light source 8 is made of high heat conduction material, such as aluminum nitride, and the heat conduction coefficient of the miniature patch type LED light source is greater than 260W/(m.K). The miniature patch type LED light source 8 is cooled by adopting a heat sink 6 and the like, and the heat sink 6 is made of high-heat-conductivity metal.
The distance between the miniature patch type LED light source 8 and the lighting window 9 is 1mm, and the miniature patch type LED light source 8 can moderately heat the lighting window 9. When the temperature and humidity of the external air are different from the temperature and humidity of the human body, the phenomenon that the surface gas is liquefied in an illumination window or an optical lens in the operation process can be avoided, and the imaging of the endoscope is influenced.
Example 2: photoelectric conversion unit
In the present embodiment, the imaging unit of the present invention is described in detail, as shown in fig. 1, the photoelectric conversion unit is located at the front end of the endoscope tube 2, and sequentially includes an imaging window 4, an imaging lens 3, an infrared cut-off filter 14, a photosensitive element 13, a PCB 12, and a cable 7 from an object to be detected along the optical axis direction, an optical signal collected by the imaging lens 3 is converted into an electrical signal of a still image or a video, and the electrical signal is output to the rear end of the endoscope tube 2 through the cable;
the imaging window 4 adopts glass with the light transmittance of more than or equal to 98% and without aluminum as a substrate, such as fused quartz, so as to ensure that the film layer has high adhesive force on the glass substrate, and the film layer can be subjected to a circulating high-pressure sterilization and disinfection process.
The outer surface of the imaging window 4 facing the illumination area is plated with an antireflection film, the surface of the antireflection film is plated with a superhard antifouling film, and the other end face of the imaging window 4 facing the handle is plated with an antireflection film, so that the limited luminous flux of the miniature surface-mounted LED light source 8 is fully utilized, and the possible scratches on the outer surface of the imaging window 4 in the cleaning and disinfection process are avoided, and the scratches can be disastrous to a small-aperture optical system.
Wherein, the front end of the photosensitive element 13 of the imaging unit is provided with an infrared cut filter 14 for filtering.
Wherein, the imaging lens 3 is arranged in the imaging lens barrel 15, and the imaging lens barrel 15 adopts the material with the thermal expansion coefficient less than or equal to 18 multiplied by 106The temperature per DEG C and the tensile strength are more than or equal to 230MPa, so that the assembly precision and stability of the precision optical lens are ensured; the inner wall of the imaging lens cone 15 is blackened, so that the imaging effect is prevented from being influenced by multiple reflections of light rays on the inner wall of the imaging lens cone 15.
The imaging lens 3 is made of a plurality of optical lenses, and is made of optical glass without using optical plastic for high-temperature sterilization.
The matching of partial optical and mechanical structures in the imaging lens 3 and the fixation of a window sheet for sealing the endoscope tube of the endoscope both use adhesive which is medical-grade epoxy resin with 134 ℃ high temperature resistance, shrinkage rate less than or equal to 0.1 percent and bonding surface shear strength more than or equal to 12MPa, the epoxy resin is biphenyl epoxy resin, SiO is added in an epoxy resin system2Nanoparticles to improve the thermal stability of the epoxy adhesive.
Example 3: electrostatic shielding structure
This embodiment is described in detail with reference to fig. 3 on the basis of embodiment 2, regarding the electrostatic shielding design of the endoscopic imaging system of embodiment 2.
The imaging lens 3 is fixed on the imaging lens base 5 in the lens tube 2, the imaging lens base 5 adopts 134 ℃ resistant circulating high-pressure sterilization, has good biocompatibility, and the volume resistance at normal temperature is more than or equal to 1015Ω·The plastic material with the magnitude of cm, namely the PEEK material, prevents the leakage current of the electronic endoscope during operation from directly flowing to the PCB 12 of the photosensitive element 13 through the imaging lens base 5, which causes the abnormal function of the imaging unit PCB 12 and even damages the PCB 12.
The non-photosensitive area of the blue glass sheet 14 in the imaging unit is fully adhered to the lens base 5 through an adhesive, a relatively closed semi-enclosed structure is formed by utilizing the low conductivity of the blue glass sheet 14 and the imaging lens base 5, the creepage distance of static electricity is increased, air breakdown is avoided, and the photoelectric conversion unit and the rear end of the imaging lens cone 15 which possibly carries the static electricity are isolated.
The rear end of an imaging lens barrel 15 of the imaging lens is designed to be a full round angle with small charge density, and the front end of the imaging lens barrel is designed to be a right angle with high charge density, so that the distribution condition of charges is improved, and the abnormal function of an imaging unit PCB 12 caused by air breakdown possibly occurring at the rear end of the imaging lens barrel 15 and a photosensitive element 13 is further avoided.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A medical electronic endoscope with a built-in light source is tubular, and is characterized in that a photoelectric conversion unit and an illumination unit are arranged at the front end of the medical electronic endoscope:
the photoelectric conversion unit is positioned in the medical electronic endoscope and used for converting optical signals collected through the imaging window and the imaging lens into electric signals of static images and/or videos;
an illumination unit which is positioned inside the medical electronic endoscope and is arranged in parallel with the photoelectric conversion unit relative to the central axis of the medical electronic endoscope; the light emitted by the lighting unit is aligned to the medical electronic endoscope through a lighting window arranged at the front end of the medical electronic endoscope and an imaging window in parallelUniformly illuminating a target area pointed by the electronic endoscope; a spacer for blocking light rays is arranged between the illumination unit and the imaging lens; the illumination window is of a half-moon-shaped structure; the imaging lens is arranged in an imaging lens barrel, and the thermal expansion coefficient of the imaging lens barrel is less than or equal to 18 multiplied by 10-6The imaging lens barrel is made of metal materials with tensile strength of more than or equal to 230MPa, the inner wall of the imaging lens barrel is black, the edge of the rear end of the imaging lens barrel is a full-round angle, and the edge of the front end of the imaging lens barrel is a right angle;
the imaging lens barrel is fixed in a lens tube of the medical electronic endoscope through a lens base, and the lens base is made of polyether-ether-ketone materials;
the photoelectric conversion unit is arranged on a blue glass sheet, a non-photosensitive area of the blue glass sheet is adhered to the lens base through an adhesive, and a semi-enclosed structure is formed through the low conductivity of the blue glass sheet and the lens base to isolate the photoelectric conversion unit from the imaging lens cone.
2. The medical electronic endoscope of claim 1, wherein the illumination unit comprises a miniature patch LED light source.
3. The medical electronic endoscope according to claim 2, wherein the substrate of the miniature patch type LED light source is made of aluminum nitride, beryllium oxide or copper-carbon fiber material, and the thermal conductivity is greater than 260W/(m-K).
4. The medical electronic endoscope with the built-in light source as set forth in claim 2, wherein the illumination window and the imaging window both use glass with a light transmittance of 98% or more, a hardness of 7 or more, and no aluminum as a substrate.
5. The medical electronic endoscope with built-in light source as set forth in claim 4, wherein the micro patch type LED light source is disposed at a position 0.2-3mm from the rear side of the illumination window.
6. The medical electronic endoscope according to claim 1, wherein an infrared cut filter is provided at a front end of the photosensitive element of the photoelectric conversion unit to filter light.
7. The medical electronic endoscope according to claim 1, wherein the imaging lens comprises a plurality of optical lenses, and the optical lenses are made of optical glass.
8. The medical electronic endoscope according to any one of claims 1 to 7, wherein the fixing of part of the components in the medical electronic endoscope is by an adhesive, and the adhesive is a medical grade epoxy resin which can resist a high temperature of 134 ℃, has a shrinkage rate of less than or equal to 0.1% and has a bonding surface shear strength of more than or equal to 12 MPa.
9. The medical electronic endoscope with built-in light source according to claim 8, wherein the epoxy resin is a biphenyl type epoxy resin, and silica nanoparticles are added to the epoxy resin system.
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| CN108836239A (en) * | 2018-07-09 | 2018-11-20 | 卓外（上海）医疗电子科技有限公司 | With the fujinon electronic video endoscope for being imaged and illuminating apex |
| CN109752837B (en) * | 2019-02-02 | 2024-03-29 | 深圳市艾丽尔特科技有限公司 | Cold light source for endoscope and endoscope using same |
| CN112099183B (en) * | 2020-09-30 | 2023-05-05 | 湖北华中长江光电科技有限公司 | PEEK-based ultra-light continuous zoom lens |
| CN112738467A (en) * | 2020-12-25 | 2021-04-30 | 湖南瑞邦医疗科技发展有限公司 | Video conversion device with shielding function |
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| CN103491845A (en) * | 2011-12-07 | 2014-01-01 | 奥林巴斯医疗株式会社 | Electronic endoscope |
| CN104873164A (en) * | 2014-02-27 | 2015-09-02 | 北京思迪医疗设备有限公司 | Separable optical hard-tube lens based on LED illumination |
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| US20070225556A1 (en) * | 2006-03-23 | 2007-09-27 | Ethicon Endo-Surgery, Inc. | Disposable endoscope devices |
| DE102013201808A1 (en) * | 2013-02-05 | 2014-08-07 | Richard Wolf Gmbh | LED lighting module |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103491845A (en) * | 2011-12-07 | 2014-01-01 | 奥林巴斯医疗株式会社 | Electronic endoscope |
| CN104873164A (en) * | 2014-02-27 | 2015-09-02 | 北京思迪医疗设备有限公司 | Separable optical hard-tube lens based on LED illumination |
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