CN105445926A - Image rotation lens group and hard tube endoscope image rotation system employing same - Google Patents
Image rotation lens group and hard tube endoscope image rotation system employing same Download PDFInfo
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- CN105445926A CN105445926A CN201511033740.6A CN201511033740A CN105445926A CN 105445926 A CN105445926 A CN 105445926A CN 201511033740 A CN201511033740 A CN 201511033740A CN 105445926 A CN105445926 A CN 105445926A
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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
- G02B23/2423—Optical details of the distal end
- G02B23/243—Objectives for endoscopes
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- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
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Abstract
The invention provides an image rotation lens group, and the lens group comprises a convex flat Hopkins rod-shaped lens, a meniscus lens, double bonding lenses, and a flat convex Hopkins rod-shaped lens. A diaphragm is disposed between the meniscus lens and the double bonding lenses, and the meniscus lens is disposed in front of the diaphragm. The lens group can effectively correct the field curvature of a system through the meniscus lens, and can improve the quality of an image. A hard tube endoscope image rotation system composed of the lens group solves problems that an image rotation system which is composed of only an odd number of Hopkins rod-shaped lenses cannot correct any aberration, is large in spherical radius and is difficult in machining. The image rotation system composed of the lens group and an even number of Hopkins rod-shaped lens reduces the number of lenses, thereby reducing the number of bonding surfaces, reducing the impact on image quality of the system from a machining error, and reducing the impact on image quality of the system from the bonding surfaces.
Description
Technical field
The invention belongs to endoscopic arts, especially relate to a kind of image transferring lens group and use the rigid pipe endoscope relay system of this image transferring lens group.
Background technology
As shown in Figure 1, rigid pipe endoscope optical system comprises three parts: OBJ is rigid pipe endoscope object lens, and it becomes inverted image to object; REL is optical inversion system of rigid tube endoscope, and it is to the 1:1 imaging again of object lens imaging, after repeatedly image rotation, finally become upright real image at rigid pipe endoscope eyepiece object space focal plane place, and its effect is the active length increasing rigid pipe endoscope; OCU is rigid pipe endoscope eyepiece, and endoscopic images is imaged on infinite distance, and observer observes aforementioned upright real image by it.
Fig. 2 to Fig. 5 represents the conventional optical inversion system of rigid tube endoscope structural representation of different optical version in prior art respectively.
Fig. 2 is early stage optical inversion system of rigid tube endoscope structural drawing, and this kind of structure is made up of two gummed compound lens that a pair structural parameters are identical, and diaphragm is positioned at centre, and vertical axial aberration obtains well-corrected.But owing to adopting compound lens, system light-transmissive rate is lower, and eyeglass easily tilts when assembling, thus influential system picture element, do not have now enterprise to use.
Optical inversion system of rigid tube endoscope shown in Fig. 3, Fig. 4 and Fig. 5, after being Hopkins proposition rod-like mirror relay system theory, the different structure form that each enterprise uses.These image rotation structures are compared with structure shown in Fig. 2, and light-transmissive rate is high, and for ultra-fine rigid pipe endoscopes such as urethrocystoscopes, image planes brightness significantly improves.
Optical inversion system of rigid tube endoscope shown in Fig. 3, it is symmetrical structure, and wherein Hopkins rod-shaped lens one end and focal length are that negative thin negative lens glues together mutually, and thin negative mirror uses the optical glass of high index of refraction, high dispersion, for correcting axial chromatic aberration, but the curvature of field can not be corrected.This optical inversion system of rigid tube endoscope advantage is that structure is simple, and shortcoming is that the non-cemented surface radius of Hopkins rod-shaped lens is large, more difficult with the processing of traditional optical process.
In optical inversion system of rigid tube endoscope shown in Fig. 4, Hopkins rod-shaped lens two ends and focal length are that negative thin negative lens glues together mutually, and thin negative lens uses the optical glass of high index of refraction, high dispersion, for correcting axial chromatic aberration, but can not correct the curvature of field.This optical inversion system of rigid tube endoscope advantage adopts symmetrical structure, and the thin lens structural parameters at Hopkins rod-shaped lens two ends are identical, and Hopkins rod-shaped lens spherical radius is little, and processing is comparatively speaking than being easier to; Shortcoming is that cemented surface is many, easily eccentric during gummed, and cemented surface is large on picture quality impact.
In optical inversion system of rigid tube endoscope shown in Fig. 5, only use two Hopkins rod-shaped lens of structural symmetry, lens number is minimum, any aberration can not be corrected, spherical radius is large, and difficulty of processing is all very large, is the Hopkins rod-shaped lens group described in the application.
Summary of the invention
In view of this, the present invention is intended to the rigid pipe endoscope relay system proposing a kind of image transferring lens group and use this image transferring lens group, to reduce the lens number of rigid pipe endoscope relay system, reduces cemented surface, improves system image quality and light-transmissive rate.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of endoscope image transferring lens group, comprise the convex flat Hopkins rod-shaped lens, meniscus lens, cemented doublet and the plano-convex Hopkins rod-shaped lens that are arranged in order along systematic optical axis, be provided with diaphragm between described meniscus lens and cemented doublet, and meniscus lens is located at diaphragm front.
Further, described convex flat Hopkins rod-shaped lens is identical with the Optic structure parameter of plano-convex Hopkins rod-shaped lens.
Further, described meniscus lens is bent moon simple lens or bent moon cemented doublet.
Further, the concave surface of described meniscus lens is towards diaphragm.
Further, the concave surface of described meniscus lens diaphragm dorsad.
Relative to prior art, endoscope image transferring lens group of the present invention can the corrective system curvature of field effectively by meniscus lens, improves picture quality.
Based on the rigid pipe endoscope relay system of endoscope image transferring lens group, also comprise even number Hopkins rod-shaped lens group, described in image transferring lens group described in a group and even number, Hopkins rod-shaped lens group arranges along systematic optical axis with random order; The Hopkins rod-shaped lens that each described Hopkins rod-shaped lens group comprises two structural symmetry and the diaphragm be located between two Hopkins rod-shaped lens, form the two telecentric system of 1:1 of structural symmetry.
Further, described in one group, described in image transferring lens group and two, Hopkins rod-shaped lens group arranges along systematic optical axis with random order, and active length is 175mm, meets Arthroscopic length requirement.
Further, described in image transferring lens group described in a group and four groups, Hopkins rod-shaped lens group arranges along systematic optical axis successively with random order, and active length is 300mm, meets urethrocystoscope, hysteroscope, laparoscopically length requirement.
Relative to prior art, the endoscope relay system based on rigid pipe endoscope image transferring lens group of the present invention has following advantage:
1) what the rigid pipe endoscope relay system formed based on image transferring lens group of the present invention overcame that the relay system that is only made up of odd number Hopkins rod-shaped lens group exists can not correct any aberration, the problem that spherical radius is large and difficulty of processing is large;
2) relative to being only for the relay system that forms of image rotation assembly that negative thin negative lens glues together mutually by Hopkins rod-shaped lens both ends or one end and focal length, decrease the sheet number of lens, and then decrease cemented surface number, reduce the impact of lens mismachining tolerance on system image quality, reduce the impact of cemented surface on system image quality.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the rigid pipe endoscope optical system described in background technology of the present invention;
Fig. 2 is the structural representation of the early stage optical inversion system of rigid tube endoscope described in background technology of the present invention;
The opposite face that Fig. 3 is two Hopkins rod-shaped lens described in background technology of the present invention is all that negative thin negative lens glues together and the structural representation of the image transferring lens group formed mutually with focal length;
The two ends that Fig. 4 is two Hopkins rod-shaped lens described in background technology of the present invention are all that negative thin negative lens glues together and the structural representation of the image transferring lens group formed mutually with focal length;
Fig. 5 is the structural representation of the image transferring lens group only using the Hopkins rod-shaped lens of two structural symmetry to form described in background technology of the present invention;
The structural representation of the image transferring lens group that Fig. 6 is formed for the employing bent moon simple lens described in the embodiment of the present invention;
The structural representation of the image transferring lens group that Fig. 7 is formed for the employing bent moon cemented doublet described in the embodiment of the present invention;
Fig. 8 is the structural representation of the relay system that the image transferring lens group that forms of employing bent moon simple lens described in the embodiment of the present invention and two groups of Hopkins rod-shaped lens groups are formed;
Fig. 9 is the structural representation of the relay system that the image transferring lens group that forms of employing bent moon simple lens described in the embodiment of the present invention and four groups of Hopkins rod-shaped lens groups are formed.
Figure 10 is the structural representation of the relay system that the image transferring lens group that forms of employing bent moon cemented doublet described in the embodiment of the present invention and two groups of Hopkins rod-shaped lens groups are formed;
Figure 11 is the structural representation of the relay system that the image transferring lens group that forms of employing bent moon cemented doublet described in the embodiment of the present invention and four groups of Hopkins rod-shaped lens groups are formed.
Description of reference numerals:
1-plano-convex Hopkins rod-shaped lens; 21-bent moon simple lens; 22-bent moon cemented doublet; 3-diaphragm; 4-cemented doublet; 5-Hopkins rod-shaped lens group; 6-image rotation assembly A; 7-image rotation assembly B.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " etc. only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, one or more these features can be expressed or impliedly be comprised to the feature being limited with " first ", " second " etc.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood by concrete condition.
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
A kind of endoscope image transferring lens group, this mirror group comprises the convex flat Hopkins rod-shaped lens 1, meniscus lens, cemented doublet 4 and the plano-convex Hopkins rod-shaped lens 1 that are arranged in order along systematic optical axis, be provided with diaphragm 3 between described meniscus lens and cemented doublet 4, and meniscus lens is located at diaphragm 3 front.
Described convex flat Hopkins rod-shaped lens 1 is identical with the Optic structure parameter of plano-convex Hopkins rod-shaped lens 1, and image height is 1mm, and angle of half field-of view is 35 degree, and focal length is 1.7mm, and relative aperture is 1/6, and object distance is-15mm, wavelength band 380-760 μm.
Described meniscus lens is bent moon simple lens 21 or bent moon cemented doublet 22, can the effective corrective system curvature of field, improves picture quality.
The concave surface of described meniscus lens is towards diaphragm 3.
The concave surface diaphragm 3 dorsad of described meniscus lens.
Based on the rigid pipe endoscope relay system of endoscope image transferring lens group, also comprise Hopkins rod-shaped lens group 5 described in image transferring lens group described in even number Hopkins rod-shaped lens group 5, a group and even number set and arrange along systematic optical axis with random order; The Hopkins rod-shaped lens 1 that each described Hopkins rod-shaped lens group 5 comprises two structural symmetry and the diaphragm 3 be located between two Hopkins rod-shaped lens 1, form the two telecentric system of 1:1 of structural symmetry.
Embodiment 1:
As shown in Figure 8, the relay system that one group of image transferring lens group be made up of bent moon simple lens 21 and two groups of Hopkins rod-shaped lens groups 5 are as shown in Figure 5 formed, Fig. 8 a) is positioned at the last of rigid pipe endoscope relay system for described image transferring lens group, rear eye lens;
Fig. 8 b) be positioned at the centre of rigid pipe endoscope relay system for image transferring lens group;
Fig. 8 c) be positioned at the foremost of rigid pipe endoscope relay system, after being located at object lens for image transferring lens group; The diverse location that image transferring lens group is positioned at rigid pipe endoscope relay system all can meet the requirement that arthroscope active length is 175mm, and the number of lenses of this system is 9;
In like manner, as shown in Figure 10, the relay system that one group of image transferring lens group be made up of bent moon cemented doublet 22 and two groups of Hopkins rod-shaped lens groups 5 are as shown in Figure 5 formed, the diverse location that image transferring lens group is positioned at rigid pipe endoscope relay system all can meet the requirement that arthroscope active length is 175mm, and the number of lenses of this system is 10;
As shown in Figure 3, one end that symmetrically arranged two panels Hopkins rod-shaped lens 1 is relative is all that negative thin negative lens glues together mutually with focal length, be provided with diaphragm 3 between two thin negative lenses, form image rotation assembly A6, the number of lenses of the relay system be made up of three groups of image rotation assembly A6 is 12;
As shown in Figure 4, the two ends of symmetrically arranged two panels Hopkins rod-shaped lens 1 are all that negative thin negative lens glues together mutually with focal length, be provided with diaphragm 3 between be wherein oppositely arranged two thin negative lenses, form image rotation assembly B7, the number of lenses of the endoscope relay system be made up of three groups of image rotation assembly B7 is 18; Show that the number of lenses of the rigid pipe endoscope of the application is minimum thus.
Embodiment 2:
As shown in Figure 9, the relay system that one group of image transferring lens group be made up of bent moon simple lens 21 and four groups of Hopkins rod-shaped lens groups 5 are as shown in Figure 5 formed, image transferring lens group the position of rigid pipe endoscope relay system by backmost to foremost respectively as a)-e) shown in, and the diverse location that image transferring lens group is positioned at rigid pipe endoscope relay system all can meet urethrocystoscope, hysteroscope, laparoscopic length are the requirement of 300mm, the number of lenses of this system is 13;
In like manner, as shown in figure 11, the relay system that one group of image transferring lens group be made up of bent moon cemented doublet 22 and four groups of Hopkins rod-shaped lens groups 5 are as shown in Figure 5 formed, image transferring lens group the position of rigid pipe endoscope relay system by backmost to foremost respectively as a)-e) shown in, and the diverse location that image transferring lens group is positioned at rigid pipe endoscope relay system all can meet urethrocystoscope, hysteroscope, laparoscopic length are the requirement of 300mm, the number of lenses of this system is 14;
As shown in Figure 3, the number of lenses of the relay system be made up of five groups of image rotation assembly A6 is 20,
As shown in Figure 4, the number of lenses of the endoscope relay system be made up of five groups of image rotation assembly B7 is 30.
Draw thus, the number of lenses of the rigid pipe endoscope relay system of the image transferring lens group be made up of bent moon simple lens 21 or bent moon cemented doublet 22 and even number set Hopkins rod-shaped lens group 5 is minimum, corresponding cemented surface is also minimum, and the minimizing of active length longer number of lenses is more, reduce the impact of lens mismachining tolerance on system image quality, reduce the impact of cemented surface on system image quality.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an endoscope image transferring lens group, it is characterized in that: this mirror group comprises the convex flat Hopkins rod-shaped lens, meniscus lens, cemented doublet and the plano-convex Hopkins rod-shaped lens that are arranged in order along systematic optical axis, be provided with diaphragm between described meniscus lens and cemented doublet, and meniscus lens is located at diaphragm front.
2. a kind of endoscope image transferring lens group according to claim 1, is characterized in that: described convex flat Hopkins rod-shaped lens is identical with the Optic structure parameter of plano-convex Hopkins rod-shaped lens.
3. a kind of endoscope image transferring lens group according to claim 1, is characterized in that: described meniscus lens is bent moon simple lens or bent moon cemented doublet.
4., according to the arbitrary described a kind of endoscope image transferring lens group of claim 1-3, it is characterized in that: the concave surface of described meniscus lens is towards diaphragm.
5., according to the arbitrary described a kind of endoscope image transferring lens group of claim 1-3, it is characterized in that: the concave surface diaphragm dorsad of described meniscus lens.
6. based on the rigid pipe endoscope relay system of endoscope image transferring lens group as claimed in claim 1, it is characterized in that: also comprise even number Hopkins rod-shaped lens group, described in image transferring lens group described in a group and even number, Hopkins rod-shaped lens group arranges along systematic optical axis with random order; The Hopkins rod-shaped lens that each described Hopkins rod-shaped lens group comprises two structural symmetry and the diaphragm be located between two Hopkins rod-shaped lens, form the two telecentric system of 1:1 of structural symmetry.
7. rigid pipe endoscope relay system according to claim 6, is characterized in that: described in one group, described in image transferring lens group and two, Hopkins rod-shaped lens group arranges along systematic optical axis with random order, and active length is 175mm.
8. rigid pipe endoscope relay system according to claim 6, is characterized in that: image transferring lens group described in a group and four described Hopkins rod-shaped lens groups arrange along systematic optical axis with random order, and active length is 300mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511033740.6A CN105445926A (en) | 2015-12-31 | 2015-12-31 | Image rotation lens group and hard tube endoscope image rotation system employing same |
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| CN201511033740.6A CN105445926A (en) | 2015-12-31 | 2015-12-31 | Image rotation lens group and hard tube endoscope image rotation system employing same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563010A (en) * | 2018-03-15 | 2018-09-21 | 安徽长庚光学科技有限公司 | Rigid endoscope |
| CN111358419A (en) * | 2020-04-18 | 2020-07-03 | 鹰利视医疗科技有限公司 | Rotating image mirror structure of laparoscope |
| CN112603246A (en) * | 2020-12-23 | 2021-04-06 | 杭州桐庐医疗光学仪器有限公司 | Bronchus endoscope |
| WO2021072656A1 (en) * | 2019-10-15 | 2021-04-22 | 深圳迈瑞生物医疗电子股份有限公司 | Endoscope and rod lens system thereof |
| CN115453740A (en) * | 2021-06-08 | 2022-12-09 | 深圳开立生物医疗科技股份有限公司 | Image rotating lens group and endoscope |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108563010A (en) * | 2018-03-15 | 2018-09-21 | 安徽长庚光学科技有限公司 | Rigid endoscope |
| CN108563010B (en) * | 2018-03-15 | 2023-09-08 | 安徽长庚光学科技有限公司 | Hard endoscope |
| WO2021072656A1 (en) * | 2019-10-15 | 2021-04-22 | 深圳迈瑞生物医疗电子股份有限公司 | Endoscope and rod lens system thereof |
| CN111358419A (en) * | 2020-04-18 | 2020-07-03 | 鹰利视医疗科技有限公司 | Rotating image mirror structure of laparoscope |
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| CN112603246A (en) * | 2020-12-23 | 2021-04-06 | 杭州桐庐医疗光学仪器有限公司 | Bronchus endoscope |
| CN115453740A (en) * | 2021-06-08 | 2022-12-09 | 深圳开立生物医疗科技股份有限公司 | Image rotating lens group and endoscope |
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Application publication date: 20160330 |