CN105278094A - Hard-tube endoscope optical system - Google Patents
Hard-tube endoscope optical system Download PDFInfo
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- CN105278094A CN105278094A CN201410285816.3A CN201410285816A CN105278094A CN 105278094 A CN105278094 A CN 105278094A CN 201410285816 A CN201410285816 A CN 201410285816A CN 105278094 A CN105278094 A CN 105278094A
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Abstract
The invention belongs to the technical field of a hard-tube endoscope and specifically relates to a hard-tube endoscope optical system. The hard-tube endoscope optical system comprises an objective lens, an optical inversion system, a video system and a CCD target surface along the light path direction in sequence. The objective lens enables an object to form an inverted image; the optical inversion system carries out image inversion on the inverted image, and forms a positive real image on an object side focal plane of the video system; and the video system enables the positive real image to be imaged to the CCD target surface. The hard-tube endoscope optical system solves the technical problems that an existing hard-tube endoscope optical system uses too many lenses and is over high in production cost; the video system is adopted to compensate for imaging distortion; the number of the lenses and cemented surfaces are greatly reduced; and processing cost of the optical system is greatly saved.
Description
Technical field
The invention belongs to rigid pipe endoscope technical field, be specifically related to a kind of low cost rigid pipe endoscope optical system.
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 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. 4 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 and Fig. 4, 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 sum, in order to correct rigid pipe endoscope aberration, in prior art, each group image rotation lenses group configures all separately thin negative lens correcting chromatic aberration, and the optical element increasing number of whole rigid pipe endoscope relay system, processing charges significantly increases.For urethrocystoscope, need 5 groups of image rotation lenses groups, when using cemented doublet, number of lenses is 20; When using three balsaming lenss, lens numbers reaches 30.
Rigid pipe endoscope is mainly used in medical diagnosis or Minimally Invasive Surgery, high-temperature sterilization is needed after using, high-temperature sterilization can make endoscopic images Quality Down, shorten endoscope serviceable life, and high-temperature sterilization or sterilization thoroughly will not cause cross-infection, therefore optimal solution uses disposable operation instrument and disposable endoscope, and rear horse back of having performed the operation is destroyed.
For disposable rigid pipe endoscope, optical system cost is crucial, and existing rigid pipe endoscope relates to lens numbers and reaches more than 30 sheets, causes endoscope high cost, cannot low cost produce in a large number.
Summary of the invention
The technical issues that need to address of the present invention are: existing rigid pipe endoscope optical system uses lens numbers too much, and production cost is too high.
Technical scheme of the present invention is as described below:
A kind of rigid pipe endoscope optical system, comprise object lens and optical inversion system successively along optical path direction, object lens become inverted image to object, and optical inversion system carries out image rotation to described inverted image; Described rigid pipe endoscope optical system also comprises video system and CCD target surface, and inverted image becomes upright real image after optical inversion system image rotation on the object space focal plane of video system, and described upright real image is imaged onto on CCD target surface by video system.
Preferably: described optical inversion system comprises odd number image rotation lenses group and several diaphragms: each image rotation lenses group comprises two the Hopkins rod-shaped lens arranged before and after optical path direction; In the middle of each image rotation lenses group two Hopkins rod-shaped lens, a diaphragm is set, forms two telecentric system.
Preferably: in described image rotation lenses group, each Hopkins rod-shaped lens rear and front end spherical radius is identical.
Preferably: in described image rotation lenses group, Hopkins rod-shaped lens adopts monolithic positive lens.
Preferably: described video system comprises the front balsaming lens and rear balsaming lens group that arrange before and after optical path direction, the rear focus of front balsaming lens overlaps with the focus in object space of rear balsaming lens group, form two telecentric optical system, enlargement ratio is the ratio of rear balsaming lens group and front balsaming lens focal length.
Preferably: described front balsaming lens is two glue and lens; The structure of described rear balsaming lens group is along the tactic cemented doublet of optical path direction, monolithic negative lens and monolithic positive lens.
Preferably: described object lens adopt direct-view object lens or stravismus object lens.
Beneficial effect of the present invention is:
(1) rigid pipe endoscope optical system of the present invention, adopts the distortion of video system compensating image, uses lens numbers and cemented surface significantly to reduce, significantly saves optical system processing cost;
(2) rigid pipe endoscope optical system of the present invention, optical energy loss reduces, and light-transmissive rate, contrast and sharpness will significantly improve, and effectively prevent the image quality decrease that mismachining tolerance causes.
Accompanying drawing explanation
Fig. 1 is prior art rigid pipe endoscope optical system schematic diagram;
Fig. 2 to Fig. 4 is optical inversion system structural representation multi-form in prior art;
Fig. 5 is an image rotation lenses group and a diaphragm in optical inversion system of the present invention;
Fig. 6 is optical inversion system structural representation of the present invention;
Fig. 7 is rigid pipe endoscope optical system structure schematic diagram of the present invention.
In figure, 1-object lens, 2-Hopkins rod-shaped lens, 3-optical inversion system, 4-video system, 5-CCD target surface, 6-diaphragm.
Embodiment
Below in conjunction with drawings and Examples, a kind of rigid pipe endoscope optical system of the present invention is described in detail.
As shown in Figure 7, rigid pipe endoscope optical system of the present invention comprises object lens 1, optical inversion system 3, video system 4 and CCD target surface 5 successively along optical path direction: object lens 1 pair of object becomes inverted image; Optical inversion system 3 carries out image rotation to described inverted image, and the object space focal plane of video system 4 becomes upright real image; Described upright real image is imaged onto on CCD target surface 5 by video system 4.
Described object lens 1 adopt object lens 1 of the prior art, can adopt direct-view object lens 1 or stravismus object lens 1.
As shown in Figure 5, Figure 6, described optical inversion system 3 comprises odd number image rotation lenses group and several diaphragms 6: each image rotation lenses group comprises two the Hopkins rod-shaped lens 2 arranged before and after optical path direction, and each Hopkins rod-shaped lens 2 rear and front end spherical radius is identical; In the middle of each image rotation lenses group two Hopkins rod-shaped lens 2, a diaphragm 6 is set, forms two telecentric system.
In the present embodiment, described Hopkins rod-shaped lens 2 adopts monolithic positive lens.
Described Hopkins rod-shaped lens 2 and diaphragm 6 parameter as shown in the table:
Described video system 4 comprises the front balsaming lens and rear balsaming lens group that arrange before and after optical path direction, the rear focus of front balsaming lens is overlapped with the focus in object space of rear balsaming lens group, form two telecentric optical system, enlargement ratio is the ratio of rear balsaming lens group and front balsaming lens focal length.Described front balsaming lens is two glue and lens; The structure of described rear balsaming lens group is along the tactic cemented doublet of optical path direction, monolithic negative lens and monolithic positive lens.
The each lens parameter of described video system 4 is as shown in the table:
Optical inversion system 3 shown in Fig. 5 only comprises two Hopkins rod-shaped lens 2, and system architecture is simple, does not have cemented surface, light-transmissive rate is high, but this structure cannot correct axial chromatic aberration, system picture element is undesirable, and the aberration of optical inversion system 3, the curvature of field and distortion can not by object lens 1 full remunerations.This patent system architecture is added by video system 4, and what achieve object lens 1, optical inversion system 3 and video system 4 three aberration combines correction, fully compensate for the aberration of system, the curvature of field and distortion, improves the image quality of system.
During Machine Design, both object lens 1, optical inversion system 3 can be designed to an entirety, use as disposable endoscope; Also object lens 1, optical inversion system 3, video system 4 can be designed to an entirety, use as hard tube fujinon electronic video endoscope.
Claims (7)
1. a rigid pipe endoscope optical system, comprise object lens (1) and optical inversion system (3) successively along optical path direction, object lens (1) become inverted image to object, and optical inversion system (3) carries out image rotation to described inverted image; It is characterized in that: rigid pipe endoscope optical system also comprises video system (4) and CCD target surface (5), inverted image becomes upright real image after optical inversion system (3) image rotation on the object space focal plane of video system (4), and described upright real image is imaged onto on CCD target surface (5) by video system (4).
2. rigid pipe endoscope optical system according to claim 1, is characterized in that: described optical inversion system (3) comprises odd number image rotation lenses group and several diaphragms (6): each image rotation lenses group comprises two the Hopkins rod-shaped lens (2) arranged before and after optical path direction; In the middle of each image rotation lenses group two Hopkins rod-shaped lens (2), a diaphragm (6) is set, forms two telecentric system.
3. rigid pipe endoscope optical system according to claim 2, is characterized in that: in described image rotation lenses group, and each Hopkins rod-shaped lens (2) rear and front end spherical radius is identical.
4. the rigid pipe endoscope optical system according to Claims 2 or 3, is characterized in that: in described image rotation lenses group, and Hopkins rod-shaped lens (2) adopts monolithic positive lens.
5. rigid pipe endoscope optical system according to claim 1 and 2, it is characterized in that: described video system (4) comprises the front balsaming lens and rear balsaming lens group that arrange before and after optical path direction, the rear focus of front balsaming lens overlaps with the focus in object space of rear balsaming lens group, form two telecentric optical system, enlargement ratio is the ratio of rear balsaming lens group and front balsaming lens focal length.
6. rigid pipe endoscope optical system according to claim 5, is characterized in that: described front balsaming lens is two glue and lens; The structure of described rear balsaming lens group is along the tactic cemented doublet of optical path direction, monolithic negative lens and monolithic positive lens.
7. rigid pipe endoscope optical system according to claim 1 and 2, is characterized in that: described object lens (1) adopt direct-view object lens (1) or stravismus object lens (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410285816.3A CN105278094A (en) | 2014-06-24 | 2014-06-24 | Hard-tube endoscope optical system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410285816.3A CN105278094A (en) | 2014-06-24 | 2014-06-24 | Hard-tube endoscope optical system |
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| CN105278094A true CN105278094A (en) | 2016-01-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597645A (en) * | 2017-02-20 | 2017-04-26 | 江苏鹰利视医疗器械有限公司 | Optical system of hard-tube type laparoscope |
| CN107085295A (en) * | 2017-06-30 | 2017-08-22 | 江苏鹰利视医疗器械有限公司 | The optical imaging system of endoscope |
| CN107744382A (en) * | 2017-11-20 | 2018-03-02 | 北京数字精准医疗科技有限公司 | Optical molecular image navigation system |
| CN108051913A (en) * | 2017-12-28 | 2018-05-18 | 北京凡星光电医疗设备股份有限公司 | A kind of endoscopic system and endoscopic camera optical system integrated design method |
| CN114027767A (en) * | 2021-12-02 | 2022-02-11 | 深圳英术生命科技有限公司 | Optical system and hard tube endoscope |
| CN114129118A (en) * | 2021-11-16 | 2022-03-04 | 深圳迈瑞生物医疗电子股份有限公司 | Rigid tube endoscope and optical assembly |
| CN114355604A (en) * | 2022-01-21 | 2022-04-15 | 天津恩泽生医疗科技有限公司 | Disposable hard tube endoscope optical system |
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| US5852511A (en) * | 1993-10-20 | 1998-12-22 | Olympus Optical Co. Ltd | Optical system for non-flexible endoscopes |
| JP3290824B2 (en) * | 1994-08-23 | 2002-06-10 | オリンパス光学工業株式会社 | Stereoscopic rigid endoscope |
| WO2008137324A2 (en) * | 2007-05-04 | 2008-11-13 | Smith & Nephew, Inc. | Color-corrected optical system, in particular a color-corrected endoscope |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597645A (en) * | 2017-02-20 | 2017-04-26 | 江苏鹰利视医疗器械有限公司 | Optical system of hard-tube type laparoscope |
| CN107085295A (en) * | 2017-06-30 | 2017-08-22 | 江苏鹰利视医疗器械有限公司 | The optical imaging system of endoscope |
| CN107744382A (en) * | 2017-11-20 | 2018-03-02 | 北京数字精准医疗科技有限公司 | Optical molecular image navigation system |
| CN108051913A (en) * | 2017-12-28 | 2018-05-18 | 北京凡星光电医疗设备股份有限公司 | A kind of endoscopic system and endoscopic camera optical system integrated design method |
| CN114129118A (en) * | 2021-11-16 | 2022-03-04 | 深圳迈瑞生物医疗电子股份有限公司 | Rigid tube endoscope and optical assembly |
| CN114027767A (en) * | 2021-12-02 | 2022-02-11 | 深圳英术生命科技有限公司 | Optical system and hard tube endoscope |
| CN114355604A (en) * | 2022-01-21 | 2022-04-15 | 天津恩泽生医疗科技有限公司 | Disposable hard tube endoscope optical system |
| CN114355604B (en) * | 2022-01-21 | 2024-03-01 | 天津恩泽生医疗科技有限公司 | Disposable hard tube endoscope optical system |
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Application publication date: 20160127 |