CN105093515A - Small-distortion large-view-field stereoscopic endoscope objective structure - Google Patents
Small-distortion large-view-field stereoscopic endoscope objective structure Download PDFInfo
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- CN105093515A CN105093515A CN201510581745.6A CN201510581745A CN105093515A CN 105093515 A CN105093515 A CN 105093515A CN 201510581745 A CN201510581745 A CN 201510581745A CN 105093515 A CN105093515 A CN 105093515A
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Abstract
The invention discloses a small-distortion large-view-field three-dimensional endoscope objective structure, which comprises a direct-viewing endoscope and an oblique-viewing endoscope, wherein the direct-viewing endoscope sequentially comprises protective glass, a first negative lens, a second negative lens, a parallel flat plate, a plano-convex lens and a subsequent cemented lens group along the light propagation direction; the squint endoscope sequentially comprises protective glass, a first negative lens, a second negative lens, a parallel flat plate, a steering prism, a plano-convex lens and a subsequent cemented lens group along the light propagation direction. The invention has smart structure, two negative lenses are arranged in front of the diaphragm, wherein the first negative lens is a plano-concave negative lens, the second negative lens is a convex-concave negative lens, the two negative lenses are organically combined, the system distortion can be corrected through optimized design, and the endoscope optical system with large field of view and small distortion is designed.
Description
Technical field
The present invention relates to a kind of endoscope lens structure, be specifically related to a kind of little distortion Large visual angle stereo endoscope objective lens arrangement, belong to rigid pipe endoscope Optical System Design technical field.
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; OCU is rigid pipe endoscope eyepiece, and endoscopic images is imaged on infinite distance, and observer observes aforementioned upright real image by it.
Conventional optical inversion system of rigid tube endoscope contains the identical image rotation lenses group of many group structures, adopt two gummed or three balsaming lenss, wherein a slice is Hopkins rod-shaped lens, these image rotation lenses groups are by the repeatedly imaging of object lens imaging, increase optical system overall length, to meet the requirement of rigid pipe endoscope active length.
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 a pair pair of gummed compound lens, 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.
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, 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.
In optical inversion system of rigid tube endoscope shown in Fig. 3, 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 can not correct the curvature of field.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, Hopkins rod-shaped lens two ends spherical radius is identical, and structure is simple.
Above-mentioned Fig. 2 to Fig. 5 represents the conventional optical inversion system of rigid tube endoscope structure of different optical version in prior art respectively, because optical system structure parameter is few, and adopts symmetrical structure, cannot correcting optical system distortion.
Fig. 6 and Fig. 7 is existing laparoscope or stereo endoscope objective lens arrangement figure, only has a slice plano-concave negative lens before the diaphragm of objective lens arrangement shown in Fig. 6, has two panels plano-convex negative lens before the diaphragm of objective lens arrangement shown in Fig. 7.
Existing rigid pipe endoscope optical system, does not use aspheric surface, cannot correct large visual field optical system distortion, causes laparoscope and the pattern distortion of stereo endoscope optical system greatly, and the tissue of observation and operating theater instruments distortion greatly, easily cause mistaken diagnosis or maloperation.General Requirements optical system field angle is greater than 80 °, and relative distortion is less than 5%.
For the structure of endoscope lens shown in Fig. 6, before diaphragm, only have a slice plano-concave lens, when field angle is less than 70 °, various aberration can be corrected very well; The structure of endoscope lens shown in Fig. 7, only has two panels plano-concave lens before diaphragm, also can correct various aberration very well when optical system field angle is greater than 80 °.
The shortcoming of the structure of endoscope lens shown in Fig. 7 is the second plano-concave lens first surface is plane, from the viewpoint of aberration correction, has lacked a variable, can not correcting image distortion very well; On the other hand, when the first plano-concave lens and the second plano-concave lens gummed, due to the effect of siphonage, ultraviolet glue rubber alloy can be drawn onto the concave surface clear aperture part of the first plano-concave lens, causes peripheral field image quality decrease or cannot imaging.
Summary of the invention
In view of this, the invention provides a kind of little distortion Large visual angle stereo endoscope objective lens arrangement, do not use aspheric surface, design little distortion Large visual angle endoscope lens, first negative lens is plano-concave negative lens, second negative lens is convex-concave negative lens, both organically combine, can corrective system be distorted by optimal design, design the little distortion endoscope optical system of Large visual angle, and the present invention first negative lens and the second negative lens glue together with parallel flat respectively, good manufacturability, positioning precision is high, sealing technology can be improved, reduce and debug cost, effectively can solve the problem in background technology.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of little distortion Large visual angle stereo endoscope objective lens arrangement, comprise direct-view endoscope and stravismus endoscope, described direct-view endoscope is followed successively by cover glass, the first negative lens, the second negative lens, parallel flat, plano-convex lens, follow-up balsaming lens group along light transmition direction; Described stravismus endoscope is followed successively by cover glass, the first negative lens, the second negative lens, parallel flat, turns to prism, plano-convex lens along light transmition direction, follow-up balsaming lens group composition.
As a preferred technical solution of the present invention, described first negative lens is plano-concave lens, and described second negative lens is meniscus.
As a preferred technical solution of the present invention, the cover glass that described direct-view endoscope is provided with, the first negative lens, the second negative lens, parallel flat, plano-convex lens are glued together; Described stravismus endoscope, the cover glass be provided with, the first negative lens, the second negative lens, parallel flat, turns to prism, plano-convex lens glued together.
As a preferred technical solution of the present invention, described first negative lens and the photosensitive glue glued adhesion of parallel flat ultraviolet.
As a preferred technical solution of the present invention, described second negative lens is glue glued adhesion photosensitive with parallel flat ultraviolet also.
As a preferred technical solution of the present invention, can be air between described cover glass and the first negative lens, described first negative lens can adopt meniscus.
The beneficial effect that the present invention reaches is: a kind of little distortion Large visual angle stereo endoscope objective lens arrangement, first negative lens and the second negative lens all glue together with parallel flat, make can relax the concave of the first negative lens and two spherical radius constraints of the second negative lens during Optical System Design, correcting optical system distortion to greatest extent, reduce adjustment difficulty during assembling, assembly cost can be reduced, add the contact length of first group, object lens and mirror pipe during object lens sealing simultaneously, improve the reliability of sealing, and the present invention first negative lens and the second negative lens glue together with parallel flat respectively, good manufacturability, positioning precision is high, sealing technology can be improved, reduce and debug cost.
Accompanying drawing explanation
Fig. 1 ~ Fig. 4 is rigid pipe endoscope optical system structure and relay system structural representation;
Fig. 5 ~ Fig. 6 is existing laparoscope or stereo endoscope objective lens arrangement figure;
Fig. 7 is the accurate debugging device structural representation of a kind of endoscopic images of the present invention, and Fig. 7 a is direct-view objective system structure, and Fig. 7 b is stravismus objective system structure;
Wherein, Reference numeral is: cover glass-1, the first negative lens-2, the second negative lens-3, parallel flat-4, plano-convex lens-5, follow-up balsaming lens group-6,7, turn to prism-8, plano-convex lens-9, direct-view endoscope-10, stravismus endoscope-11.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, describe the present invention.
Embodiment: refer to Fig. 1-7, a kind of little distortion Large visual angle stereo endoscope objective lens arrangement of the present invention, comprise direct-view endoscope 10 and stravismus endoscope 11, described direct-view endoscope 10 is followed successively by cover glass 1, first negative lens 2, second negative lens 3, parallel flat 4, plano-convex lens 5, follow-up balsaming lens group 6 and 7 along light transmition direction; Described stravismus endoscope 11 is followed successively by cover glass 1, first negative lens 2, second negative lens 3, parallel flat 4, turns to prism 8, plano-convex lens 9 along light transmition direction, follow-up balsaming lens group 6 and 7 forms.
Described first negative lens 2 is plano-concave lens, described second negative lens 3 is meniscus, both organically combine, can corrective system be distorted by optimal design, design the little distortion endoscope optical system of Large visual angle, cover glass 1, first negative lens 2, second negative lens 3 that described direct-view endoscope 10 is provided with, parallel flat 4, plano-convex lens 5 five are glued together, described stravismus endoscope 11, the cover glass 1 be provided with, first negative lens 2, second negative lens 3, parallel flat 4, turn to prism 8, plano-convex lens 9 six is glued together, make can relax the concave of the first negative lens 2 and two spherical radius constraints of the second negative lens 3 during Optical System Design, correcting optical system distortion to greatest extent, described first negative lens 2 and the parallel flat 4 photosensitive glue glued adhesion of ultraviolet, described second negative lens 3 also with parallel flat 4 ultraviolet photosensitive glue glued adhesion, can be air between described cover glass 1 and the first negative lens 2, now described first negative lens 2 can adopt meniscus, reduce adjustment difficulty during assembling, assembly cost can be reduced, add the contact length of first group, object lens and mirror pipe during object lens sealing simultaneously, improve the reliability of sealing.
It should be noted that, the present invention is a kind of little distortion Large visual angle stereo endoscope objective lens arrangement, add man-hour, first, second negative lens 3 and the parallel flat 4 photosensitive glue glued adhesion of ultraviolet, after solidification the first negative lens 2 all with parallel flat 4 ultraviolet photosensitive glue glued adhesion, secondly, above-mentioned three glue together parts for looking at object lens straight and plano-convex lens 5 glues together; Glue together with plano-convex lens 9 again after stravismus object lens and prism 8 are glued together.
Table 1 optical system structure parameter
| Sequence number | Spherical radius | Thickness | Optical material |
| 1 | 1e+018 | 20 | Air |
| 2 | 1e+018 | 0.8 | SAPHIR_SPECIAL |
| 3 | 1e+018 | 0.4 | K9_CHINA |
| 4 | 2.5 | 0.3 | Air |
| 5 | 6.557 | 0.3 | K9_CHINA |
| 6 | 1.5 | 0.36 | Air |
| 7 | 1e+018 | 2 | K9_CHINA |
| 8 | 1e+018 | 1 | SLAH64_OHARA |
| STO | 1e+018 | 4 | SLAH64_OHARA |
| 10 | 1e+018 | 5 | SLAH64_OHARA |
| 11 | -6.6 | 1.5 | Air |
| 12 | 5.13 | 4.2 | SLAH64_OHARA |
| 13 | -7.8 | 1.3 | |
| 14 | 2.28 | 0.6 | Air |
| 15 | 6.86 | 1.4 | SLAH64_OHARA |
| 16 | 2.5 | 4.2 | |
| 17 | -12.9 | 3.9 | Air |
Table 1 is object lens initial structure parameter, and wherein: first surface is object plane, r2, r3 are sapphire cover glass, and r3, r4 are the first plano-concave lens, and r5, r6 are the second meniscus, and r7, r8 are parallel flat, and r9 optics is diaphragm face.During system, optimum structural parameter, guarantee the clear aperture of the radius r 4 of the second meniscus, r5 and this eyeglass, its first plano-concave negative lens and second convex-concave negative lens when gluing together are not interfered.
Also the structure of sapphire cover glass and the soldering of mirror pipe can be adopted during design, now, optical system structure parameter and just in table 2.
Table 2 optical system structure parameter
| Sequence number | Spherical radius | Thickness | Optical material |
| 1 | 1e+018 | 20 | Air |
| 2 | 1e+018 | 0.8 | SAPHIR_SPECIAL |
| 3 | 1e+018 | 0.1 | Air |
| 4 | 5 | 0.4 | K9_CHINA |
| 5 | 2.5 | 0.3 | Air |
| 6 | 6.557 | 0.3 | K9_CHINA |
| 7 | 1.5 | 0.36 | Air |
| 8 | 1e+018 | 2 | K9_CHINA |
| 9 | 1e+018 | 1 | SLAH64_OHARA |
| STO | 1e+018 | 4 | SLAH64_OHARA |
| 11 | 1e+018 | 5 | SLAH64_OHARA |
| 12 | -6.6 | 1.5 | Air |
| 13 | 5.13 | 4.2 | SLAH64_OHARA |
| 14 | -7.8 | 1.3 | |
| 15 | 2.28 | 0.6 | Air |
| 16 | 6.86 | 1.4 | SLAH64_OHARA |
| 17 | 2.5 | 4.2 | |
| 18 | -12.9 | 3.9 | Air |
Adopt the structural parameters of table 2, the first plano-concave lens can be convex-concave structure, and such picture quality can be better.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.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 (6)
1. one kind little distortion Large visual angle stereo endoscope objective lens arrangement, comprise direct-view endoscope (10) and stravismus endoscope (11), it is characterized in that: described direct-view endoscope (10) is followed successively by cover glass (1), the first negative lens (2), the second negative lens (3), parallel flat (4), plano-convex lens (5), follow-up balsaming lens group (6) and (7) along light transmition direction; Described stravismus endoscope (11) is followed successively by cover glass (1), the first negative lens (2), the second negative lens (3), parallel flat (4), turns to prism (8) along light transmition direction, plano-convex lens (9), follow-up balsaming lens group (6) and (7) composition.
2. one according to claim 1 little distortion Large visual angle stereo endoscope objective lens arrangement, is characterized in that, described first negative lens (2) is plano-concave lens, and described second negative lens (3) is meniscus.
3. one according to claim 1 little distortion Large visual angle stereo endoscope objective lens arrangement, it is characterized in that, the cover glass (1) that described direct-view endoscope (10) is provided with, the first negative lens (2), the second negative lens (3), parallel flat (4), plano-convex lens (5) five are glued together; Described stravismus endoscope (11), the cover glass be provided with (1), the first negative lens (2), the second negative lens (3), parallel flat (4), turns to prism (8), plano-convex lens (9) six glued together.
4. one according to claim 1 little distortion Large visual angle stereo endoscope objective lens arrangement, is characterized in that, described first negative lens (2) and parallel flat (4) the photosensitive glue glued adhesion of ultraviolet.
5. one according to claim 1 little distortion Large visual angle stereo endoscope objective lens arrangement, is characterized in that, described second negative lens (3) also with parallel flat (4) ultraviolet photosensitive glue glued adhesion.
6. one according to claim 1 little distortion Large visual angle stereo endoscope objective lens arrangement; it is characterized in that; can be air between described cover glass (1) and the first negative lens (2), described first negative lens (2) can also adopt meniscus.
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| CN105403992A (en) * | 2015-12-28 | 2016-03-16 | 天津市融和机电科技有限公司 | Hard tube endoscope object lens and manufacturing method thereof |
| CN105511070A (en) * | 2015-12-31 | 2016-04-20 | 天津市融和机电科技有限公司 | Optical system for endoscope |
| CN105662315A (en) * | 2015-12-31 | 2016-06-15 | 天津市融和机电科技有限公司 | High-resolution breast duct endoscope optical system |
| CN106405781A (en) * | 2016-11-25 | 2017-02-15 | 中国科学院长春光学精密机械与物理研究所 | Glued lens structure and manufacturing method thereof |
| DE102017113273A1 (en) | 2017-06-16 | 2018-12-20 | avateramedical GmBH | Lens for an endoscope and endoscope |
| WO2019001275A1 (en) * | 2017-06-30 | 2019-01-03 | 鹰利视医疗科技有限公司 | Optical imaging system for endoscope |
| CN109324359A (en) * | 2017-07-31 | 2019-02-12 | 北京威斯顿亚太光电仪器有限公司 | A kind of aspherical glass stick mirror for rigid pipe endoscope |
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- 2015-09-13 CN CN201510581745.6A patent/CN105093515A/en active Pending
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| CN105403992A (en) * | 2015-12-28 | 2016-03-16 | 天津市融和机电科技有限公司 | Hard tube endoscope object lens and manufacturing method thereof |
| CN105511070A (en) * | 2015-12-31 | 2016-04-20 | 天津市融和机电科技有限公司 | Optical system for endoscope |
| CN105662315A (en) * | 2015-12-31 | 2016-06-15 | 天津市融和机电科技有限公司 | High-resolution breast duct endoscope optical system |
| CN106405781A (en) * | 2016-11-25 | 2017-02-15 | 中国科学院长春光学精密机械与物理研究所 | Glued lens structure and manufacturing method thereof |
| DE102017113273A1 (en) | 2017-06-16 | 2018-12-20 | avateramedical GmBH | Lens for an endoscope and endoscope |
| CN109143538A (en) * | 2017-06-16 | 2019-01-04 | 阿瓦特拉医药有限公司 | For objective of endoscope and endoscope |
| US11089948B2 (en) | 2017-06-16 | 2021-08-17 | avateramedical GmBH | Objective lens for an endoscope |
| CN109143538B (en) * | 2017-06-16 | 2022-03-04 | 阿瓦特拉医药有限公司 | Objective lens for endoscope and endoscope |
| WO2019001275A1 (en) * | 2017-06-30 | 2019-01-03 | 鹰利视医疗科技有限公司 | Optical imaging system for endoscope |
| CN109324359A (en) * | 2017-07-31 | 2019-02-12 | 北京威斯顿亚太光电仪器有限公司 | A kind of aspherical glass stick mirror for rigid pipe endoscope |
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