CN219089213U

CN219089213U - Polarized light endoscope imaging assembly and endoscope camera

Info

Publication number: CN219089213U
Application number: CN202222581637.7U
Authority: CN
Inventors: 郭毅军; 田鹏; 刘中航
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-05-30
Anticipated expiration: 2032-09-28

Abstract

The utility model discloses a polarized light endoscope imaging assembly and an endoscope camera, wherein the polarized light endoscope imaging assembly comprises a supporting seat assembly, a beam splitting prism, an RGB image sensor module and a polarized light image sensor module, the supporting seat assembly comprises a supporting seat and a prism pressing plate, the supporting seat comprises a supporting seat main body, and the supporting seat main body is provided with a mirror mounting groove, a light beam inlet, a first light beam outlet, a second light beam outlet and an inlet; the prism pressing plate cover is arranged at the position of the putting-in opening. According to the polarized light endoscope imaging assembly, the RGB image sensor module and the polarized light image sensor module are used for collecting image information, so that the underwater turbid environment identification capacity is improved, and the problem that an output image of an endoscope device is not clear is solved; in addition, the positioning accuracy is more accurate, and the assembly difficulty is lower.

Description

Polarized light endoscope imaging assembly and endoscope camera

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a polarized light endoscope imaging assembly and an endoscope camera.

Background

The endoscope is a medical electronic optical instrument which can be inserted into the cavity of human body and the internal cavity of viscera to directly observe, diagnose and treat, and adopts an optical lens with very small size to optically image the object in the cavity to be observed through a tiny objective imaging system, then the optical imaging is sent to an image processing host, and finally the observed image after the image processing is output on a display screen for observation and diagnosis by doctors.

During the use, the endoscope can not output clear imaging under the operation environment that has blood water, turbid water, tissue bits and dust, fog, and unclear imaging can make the doctor receive the interference when the operation, only can carry out the operation after the interference environment (blood water, turbid water, tissue bits and dust, fog) is cleared up sometimes, leads to the operation inefficiency. At present, some researches propose to solve the problem that imaging cannot be clearly performed in an interference environment by using a polarized light imaging technology, and the technology needs to divide a light beam into two light beams by a beam splitting prism, and respectively receive the two light beams by using an RGB image sensor and a polarized light image sensor. However, due to the small size of the endoscope camera, how to arrange the beam splitting prism, the RGB image sensor, the polarized light image sensor and the circuit board in a limited space is a technical difficulty. Based on this, there is a need to solve the problem of how to apply the polarized light imaging technology to an endoscope, so as to realize clear imaging of the endoscope in an interference environment.

Disclosure of Invention

The present utility model has been made in view of the above-mentioned prior art, and an object of the present utility model is to provide a polarized light endoscope imaging module capable of obtaining clear imaging in an interference environment (blood, turbid water, tissue dust, mist). Another technical problem to be solved by the present utility model is to provide an endoscopic camera with the above polarized light endoscopic imaging assembly.

In order to solve the above technical problems, the present utility model provides a polarized light endoscope imaging assembly, comprising: the light source comprises a support seat assembly, a beam splitting prism, an RGB image sensor module and a polarized light image sensor module, wherein the beam splitting prism is arranged on the support seat assembly and used for splitting a light beam into a first light beam and a second light beam, the RGB image sensor module is used for receiving the first light beam, and the polarized light image sensor module is used for receiving the second light beam; the support seat assembly comprises a support seat and a prism pressing plate, wherein the support seat comprises a support seat main body, and the support seat main body is provided with a prism installation groove for accommodating the beam splitting prism, a beam inlet positioned at the front side of the prism installation groove and used for injecting a beam into the beam splitting prism, a first beam outlet positioned at the rear side of the prism installation groove and used for injecting the first beam or the second beam, a second beam outlet positioned at the periphery side of the prism installation groove and used for injecting the second beam or the first beam, and an inlet used for loading the beam splitting prism into the prism installation groove; the prism pressing plate cover is arranged at the position of the placing opening.

In the polarized light endoscope imaging assembly in the embodiment, one beam output by the optical lens is divided into two beams by the beam splitting prism, one beam is output to the RGB image sensor module, and the other beam is output to the polarized light image sensor module; the RGB image sensor module collects RGB light signals output by the optical lens and converts the RGB light signals into RGB pixel data; the polarized light image sensor 241 collects the polarized light signals output by the optical lens and converts the polarized light signals into polarized information pixel data, the RGB pixel data and the polarized information pixel data are transmitted to the rear-end camera host (not shown in the figure), and the rear-end camera host processes the graphic information into a required real-time image through software, so that when the situations of blood water, tissue dust, fog and the like occur in the operation environment, the problem that the output image of the endoscope device is not clear is solved through processing and utilizing the polarized information pixel data. And during assembly, the beam splitter prism is installed in the prism mounting groove through the placing port, the degree of freedom of the beam splitter prism is limited through the prism mounting groove, then the prism pressing plate is installed on the supporting seat main body, the last degree of freedom of the beam splitter prism is limited through the prism pressing plate, and the positioning accuracy is more accurate and the assembly difficulty is lower through the positioning mode and the degree of freedom limiting mode.

In one embodiment, the inner wall surface of the first light beam outlet is matched with the outer peripheral side surface of the RGB image sensor module or the polarized light image sensor of the polarized light image sensor module.

In one embodiment, the inner wall surface of the second light beam outlet is matched with the outer peripheral side surface of the polarized light image sensor module or the RGB image sensor of the RGB image sensor module.

In one embodiment, the prism pressing plate is provided with a positioning boss protruding inwards, and the peripheral side surface of the positioning boss is matched with the inner wall surface of the placing port.

In one embodiment, the second beam outlet is arranged opposite the entrance opening.

In one embodiment, the supporting seat further comprises an outer cylinder sleeved outside the supporting seat main body, and the front end of the outer cylinder is connected with the front end of the supporting seat main body.

In one embodiment, the outer barrel includes a mounting platform portion for mounting a key circuit board, the mounting platform portion and the second beam outlet being located on the same side of the prism mounting slot.

In one embodiment, the polarized light endoscope imaging assembly further comprises a shielding cover sleeved in the outer cylinder, wherein a positioning plane is arranged on the outer peripheral surface of the shielding cover, and the positioning plane is matched with the inner surface of the mounting platform part.

In one embodiment, the outer cylinder is provided with a notch for avoiding the prism pressing plate.

The utility model provides an endoscope camera, which comprises a shell component and also comprises a polarized light endoscope imaging component, wherein the polarized light endoscope imaging component is positioned in the shell component.

The advantageous effects of the additional technical features of the present utility model will be described in the detailed description section of the present specification.

Drawings

FIG. 1 is a cross-sectional view of an endoscopic camera in an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of an imaging assembly of the endoscopic camera shown in FIG. 1;

FIG. 3 is an exploded view of the imaging assembly shown in FIG. 2;

FIGS. 4 and 5 are perspective views of the support base of the imaging assembly shown in FIG. 2 in two different orientations, respectively;

fig. 6 is a perspective view of a prismatic platen of the imaging assembly shown in fig. 2.

Reference numerals illustrate:

100. a housing assembly; 200. an imaging assembly; 210. a beam-splitting prism; 220. a support base; 221. a support base main body; 222. an outer cylinder; 222a, a mounting platform portion; 222b, avoidance holes; 223. a prism mounting groove; 224. a beam inlet; 225. an inlet; 226. a first beam outlet; 226a, small diameter holes; 226b, large diameter holes; 227. a second beam outlet; 228. a first screw hole; 229. a mounting groove; 230. a prism pressing plate; 231. positioning the boss; 232. a first fixing hole; 240. a circuit board assembly; 241. a polarized light image sensor; 242. a first circuit board; 243. a second circuit board; 243a, a third fixing hole; 244. a third circuit board; 245. a fourth circuit board; 247. an RGB image sensor; 250. a light filter; 262. a first locking screw; 263. a second locking screw; 264. a third locking screw; 265. a fourth locking screw; 266. a stud; 270. a key circuit board; 280. a shield; 281. positioning a plane; 300. a cable.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily apparent, a more particular description of the utility model briefly described above will be rendered by reference to the appended drawings. It is apparent that the specific details described below are only some of the embodiments of the present utility model and that the present utility model may be practiced in many other embodiments that depart from those described herein. Based on the embodiments of the present utility model, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.

In this document, when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms front, rear, upper, lower, etc. are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only used for the clarity and convenience of the expression technical scheme. It should be understood that the use of such orientation terms should not limit the scope of the protection sought herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Fig. 1 is a sectional view showing a configuration of an endoscope camera head in one embodiment of the present utility model. As shown in fig. 1, the endoscopic camera includes a housing assembly 100 and an imaging assembly 200 disposed within the housing assembly 100.

Fig. 2 is a cross-sectional view of an imaging assembly 200 according to an embodiment of the present utility model, and fig. 3 is an exploded view of the imaging assembly 200 according to an embodiment of the present utility model. As shown in fig. 2-3, the imaging assembly 200 includes a support base 220 assembly, a beam splitting prism 210, and a circuit board assembly 240, wherein the support base 220 assembly includes a support base 220 and a prism pressing plate 230, the beam splitting prism 210 is installed in a receiving cavity formed by the support base 220 and the prism pressing plate 230, and the beam splitting prism 210 is used for splitting a light beam into a first light beam and a second light beam. The circuit board assembly 240 includes a polarized light image sensor module for collecting polarized light signals of the second light beam and converting the polarized light signals into electrical signals, and an RGB image sensor module for receiving RGB light signals of the first light beam and converting the RGB light signals into electrical signals.

The beam splitter prism 210 may be a polarization beam splitter prism, the beam splitter prism 210 splitting a light beam into an RGB light beam (first light beam in the present embodiment) and a polarized light beam (second light beam in the present embodiment), the RGB image sensor module collecting RGB light signals of the RGB light beam and converting the RGB light signals into electrical signals, and the polarized light image sensor module collecting polarized light signals of the polarized light beam and converting the polarized light signals into electrical signals. The beam splitter prism 210 may be a common prism, where the beam splitter prism 210 splits one beam into two beams with the same characteristics, the RGB image sensor module collects RGB optical signals in one beam and converts the RGB optical signals into electrical signals, and the polarized light image sensor module collects polarized optical signals in the other beam and converts the polarized optical signals into electrical signals.

In the imaging assembly 200 in this embodiment, the beam splitting prism 210 splits one beam output by the optical lens into two beams, one beam is output to the RGB image sensor module, and the other beam is output to the polarized light image sensor module; the RGB image sensor module collects RGB light signals output by the optical lens and converts the RGB light signals into RGB pixel data; the polarized light image sensor 241 collects the polarized light signals output by the optical lens and converts the polarized light signals into polarized information pixel data, the RGB pixel data and the polarized information pixel data are transmitted to the rear-end camera host (not shown in the figure), and the rear-end camera host processes the graphic information into a required real-time image through software, so that when the situations of blood water, tissue dust, fog and the like occur in the operation environment, the problem that the output image of the endoscope device is not clear is solved through processing and utilizing the polarized information pixel data.

As shown in fig. 2 to 5, the support base 220 as an example includes a support base body 221, a prism mounting groove 223 for accommodating the prism 210, a beam inlet 224 for the beam to enter the prism 210 at the front side of the prism mounting groove 223, a first beam outlet 226 for the second beam to exit at the rear side of the prism mounting groove 223, a second beam outlet 227 for the first beam to exit at the peripheral side of the prism mounting groove 223, and an entrance 225 for the prism 210 to be installed in the prism mounting groove 223 are provided on the support base body 221, and a prism pressing plate 230 is provided at the entrance 225 in a covering manner. During assembly, the beam splitter prism 210 is installed in the prism installation groove 223 through the placement opening 225, the freedom degrees of the beam splitter prism 210 in five directions are limited through the prism installation groove 223, then the prism pressing plate 230 is installed on the supporting seat main body 221, the last freedom degree of the beam splitter prism 210 is limited through the prism pressing plate 230, and the positioning accuracy is more accurate and the assembly difficulty is lower through the positioning mode and the freedom degree limiting mode. Preferably, the second beam outlet 227 is disposed opposite the inlet 225. In this embodiment, the second beam outlet 227 and the placement port 225 are located above and below the prism mounting groove 223, respectively, so that the assembly space of the dichroic prism is sufficient, and the assembly difficulty of the dichroic prism is reduced.

As shown in fig. 6, the exemplary prism pressing plate 230 has an inwardly protruding positioning boss 231, and the outer circumferential side of the positioning boss 231 is fitted to the inner wall surface of the insertion port 225. The prism pressing plate 230 and the supporting seat main body 221 adopt a peripheral plane positioning mode, so that the positioning accuracy is more accurate, and the assembly difficulty is lower. The prism pressing plate 230 is provided with a first fixing hole 232, the supporting seat main body 221 is provided with a first screw hole 228 corresponding to the first fixing hole 232, and the first locking screw 262 penetrates through the first fixing hole 232 and is screwed into the first screw hole 228 to fix the prism pressing plate 230 on the supporting seat main body 221. The prism pressing plate 230 and the supporting base main body 221 may also be fixed by glue.

As shown in fig. 2 and 3, the polarized light image sensor module as an example includes a first circuit board 242 and a polarized light image sensor 241 provided on the first circuit board 242, and an outer circumferential side surface of the polarized light image sensor 241 is mated with an inner wall surface of the first light beam outlet 226 to position the polarized light image sensor 241. The polarized light image sensor 241 and the supporting seat main body 221 adopt a peripheral plane positioning mode, so that the positioning accuracy is more accurate, and the assembly difficulty is lower. The first light beam outlet 226 as an example is a stepped hole including a small diameter hole 226a and a large diameter hole 226b connected in this order from front to back, and an inner wall surface of the large diameter hole 226b is fitted to an outer peripheral side surface of the polarized light image sensor 241. The first circuit board 242 is provided with a second fixing hole (not shown), the rear end surface of the supporting seat main body 221 is provided with a second screw hole (not shown) corresponding to the second fixing hole, and the second locking screw 263 is screwed into the second screw hole through the second fixing hole so as to fix the first circuit board 242 on the supporting seat main body. The first circuit board 242 and the supporting seat main body can also be fixed by glue.

The exemplary RGB image sensor module includes a second circuit board 243 and an RGB image sensor 247 provided on the second circuit board 243, and an outer circumferential side surface of the RGB image sensor 247 is mated with an inner wall surface of the second light beam outlet 227 to position the RGB image sensor 247. The RGB image sensor 247 and the supporting seat main body 221 adopt a peripheral plane positioning mode, so that the positioning accuracy is more accurate, and the assembly difficulty is lower. The second circuit board 243 is provided with a third fixing hole 243a, the supporting seat main body 221 is provided with a third screw hole (not shown in the figure) corresponding to the third fixing hole 243a, and the third locking screw 264 is screwed into the third screw hole through the third fixing hole 243a so as to fix the second circuit board 243 on the supporting seat main body. The second circuit board 243 and the supporting seat main body may also be fixed by glue.

The exemplary circuit board assembly 240 further includes a third circuit board 244 and a fourth circuit board 245, and the first circuit board 242, the third circuit board 244, and the fourth circuit board 245 are sequentially spaced from front to back along the axial direction of the support base 220 and are coupled together by a stud 266 and a fourth locking screw 265. The first circuit board 242, the third circuit board 244 and the fourth circuit board 245 are connected by wires, the first circuit board 242 is connected with the second circuit board 243 by wires, and the fourth circuit board 245 is connected with the cable 300.

In one embodiment, the supporting seat 220 further includes an outer cylinder 222 sleeved outside the supporting seat main body 221, and a front end of the outer cylinder 222 is connected to a front end of the supporting seat main body 221. Preferably, a mounting platform part 222a for mounting the key circuit board 270 is provided on the outer circumferential side surface of the outer cylinder 222, and the mounting platform part 222a and the second light beam outlet 227 are located on the same side of the prism mounting groove 223. An avoidance hole 222b opposite to the third screw hole is formed in the outer cylinder 222, and when the screw driver is assembled, the screw driver penetrates through the avoidance hole 222b to screw the third locking screw 264 into the third screw hole. Preferably, the outer cylinder 222 is provided with a notch for avoiding the prism pressing plate 230, so as to facilitate assembling the prism pressing plate 230.

In one embodiment, the imaging assembly further includes a shield 280 that is nested within the outer barrel, and the third circuit board 244 and the fourth circuit board 245 are housed within the shield 280. The outer peripheral surface of the shielding case 280 is provided with a positioning plane 281, and the positioning plane 281 is matched with the inner surface of the mounting platform 222 a. The shielding cover 280 and the outer cylinder are positioned in a semicircular mode, positioning is more accurate, and assembly is easier.

Alternatively, the positions of the RGB image sensor module and the polarized light image sensor module may be reversed, i.e. the RGB image sensor module is mounted at the first beam outlet 226 and the polarized light image sensor module is mounted at the second beam outlet 227.

As shown in fig. 2, the exemplary imaging assembly 200 also includes a filter 250 disposed at the beam inlet 224. As shown in fig. 5, the front end surface of the support base 220 is provided with a mounting groove 229, and the filter 250 is engaged in the mounting groove 229. The optical filter 250 and the supporting seat 220 adopt a peripheral plane positioning mode, so that the positioning accuracy is more accurate, and the assembly difficulty is lower.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. A polarized endoscopic imaging assembly comprising: the light source comprises a support seat assembly, a beam splitting prism, an RGB image sensor module and a polarized light image sensor module, wherein the beam splitting prism is arranged on the support seat assembly and used for splitting a light beam into a first light beam and a second light beam, the RGB image sensor module is used for receiving the first light beam, and the polarized light image sensor module is used for receiving the second light beam;

the support seat assembly is characterized by comprising a support seat and a prism pressing plate, wherein the support seat comprises a support seat main body, and the support seat main body is provided with a prism installation groove for accommodating the beam splitting prism, a beam inlet which is positioned at the front side of the prism installation groove and used for injecting a beam into the beam splitting prism, a first beam outlet which is positioned at the rear side of the prism installation groove and used for injecting the first beam or the second beam, a second beam outlet which is positioned at the periphery side of the prism installation groove and used for injecting the second beam or the first beam, and an inlet which is used for loading the beam splitting prism into the prism installation groove; the prism pressing plate cover is arranged at the position of the placing opening.

2. The polarized light endoscopic imaging assembly of claim 1, wherein an inner wall surface of the first beam outlet mates with an RGB image sensor of the RGB image sensor module or an outer peripheral side of a polarized light image sensor of the polarized light image sensor module.

3. The polarized light endoscopic imaging assembly of claim 1, wherein an inner wall surface of the second beam outlet mates with a polarized light image sensor of the polarized light image sensor module or an outer peripheral side surface of an RGB image sensor of the RGB image sensor module.

4. The polarized light endoscopic imaging assembly of claim 1, wherein the prismatic platen has an inwardly protruding positioning boss with a peripheral side surface that mates with an inner wall surface of the insertion port.

5. The polarized light endoscopic imaging assembly of claim 1, wherein the second beam outlet is disposed opposite the insertion port.

6. The polarized light endoscopic imaging assembly of any one of claims 1 to 5, wherein the support base further comprises an outer barrel sleeved outside the support base body, a front end of the outer barrel being connected to a front end of the support base body.

7. The polarized light endoscopic imaging assembly of claim 6, wherein the outer barrel comprises a mounting platform portion for mounting a key circuit board, the mounting platform portion and the second beam outlet being located on the same side of the prism mounting slot.

8. The polarized light endoscopic imaging assembly of claim 7, further comprising a shield nested within the outer barrel, an outer peripheral surface of the shield defining a locating plane, the locating plane mating with an inner surface of the mounting platform portion.

9. The polarized light endoscopic imaging assembly of claim 6, wherein the outer barrel is provided with a notch for avoiding the prismatic platen.

10. An endoscopic camera head comprising a housing assembly, further comprising a polarized endoscopic imaging assembly according to any one of claims 1 to 9, said polarized endoscopic imaging assembly being located within said housing assembly.