CN105807418A - Industrial endoscope optical system - Google Patents
Industrial endoscope optical system Download PDFInfo
- Publication number
- CN105807418A CN105807418A CN201610328569.XA CN201610328569A CN105807418A CN 105807418 A CN105807418 A CN 105807418A CN 201610328569 A CN201610328569 A CN 201610328569A CN 105807418 A CN105807418 A CN 105807418A
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- CN
- China
- Prior art keywords
- lens
- optical system
- industrial endoscope
- diaphragm
- endoscope optical
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/22—Telecentric objectives or lens systems
-
- 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
- G02B23/2438—Zoom objectives
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Lenses (AREA)
Abstract
The invention provides an industrial endoscope optical system.The industrial endoscope optical system comprises window glass, a reflector, a diaphragm, a lens set and an optical axis formed by the lens set jointly.Multiple lenses are composed of the lens L1, the lens L2, the lens L3, the lens L4 and the lens L5 which are sequentially arranged on the optical axis.The optical axis penetrates through the window glass after being reflected by the reflector, the window glass is parallel to the unreflected optical axis, the diaphragm is arranged at one position between the lens L1 and the lens L2 or the lens L3 or the lens L4 or the lens L5, the lens set between one side of the diaphragm and the reflector is the front lens set and is used for curvature correction of the spherical aberration and astigmatism, and the lens set on the other side of the diaphragm is the rear lens set and is used for generating negative astigmatism and correcting the field curvature and distortion.Curvature correction can be conducted on the spherical aberration and astigmatism, the field curvature and distortion can be corrected, the field depth is large, rear-end optical fiber focusing is convenient, sealing performance is good, and pollution is avoided.
Description
Technical field
The present invention relates to closely imaging system technology field, be specifically related to a kind of industrial endoscope optical system.
Background technology
Industrial endoscope can be used for inspection and the observation in the place that high temperature, poisonous, radioprotective and human eye cannot observe directly, it is mainly used in automobile, aero-engine, pipeline, machine components etc., when not needing dismounting or destruction assembling and equipment to realize Non-Destructive Testing out of service, each department of aviation, automobile, boats and ships, the modern core industry such as electric, chemistry, electric power, coal gas, atomic energy, civil construction can be widely used in.Industrial endoscope also can couple with photographing unit, video camera or electronic computer, and composition photograph, shooting and image processing system, thus carrying out the supervision of visual field target, record, storage and image analysis.
General endoscope depth of field under industrial operations environment is less, inadequate for sealing in the space of heavy contamination.
Summary of the invention
It is an object of the invention to overcome prior art Problems existing, it is provided that a kind of industrial endoscope optical system.
For realizing above-mentioned technical purpose, reaching above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of industrial endoscope optical system, including window glass, reflecting mirror, diaphragm, battery of lens, and the optical axis that battery of lens is collectively forming, described multiple lens are by the lens L1 being set in turn on optical axis, lens L2, lens L3, lens L4 and lens L5 composition, described optical axis reflects through window glass by reflecting mirror, described window glass and unreflected optical axis be arranged in parallel, at lens L1, lens L2, lens L3, a place between lens L4 or lens L5 is provided with diaphragm, battery of lens between described diaphragm side and reflecting mirror organizes lens before constituting, for curvature correction spherical aberration and astigmatism, the battery of lens of diaphragm opposite side organizes lens after constituting, dissipate and correct the curvature of field and distortion for producing reversed image.
Further, before described, group lens include lens L1, described lens L1 is positive light coke simple lens, after described, group lens include the lens L2, lens L3, lens L4 and the lens L5 that from the close-by examples to those far off set gradually from diaphragm side, described lens L2, lens L3, lens L4 and the latter half that lens L5 is double gauss mirror group.
Further, described lens L3, lens L4 and lens L5 are positive light coke normally glued mirror group, and lens L3, lens L4, lens L5 diaphragm all dorsad is arranged so that it is be in not dizzy position, are used for producing reversed image and dissipate.
Further, described lens L5 near the side of image planes to curvature of the image, in order to correct the curvature of field and distortion.
Further, described window glass and chief ray angle on thing square shaft: lower GPI is 56.6 °；Its clear aperture is ellipse: lower GPI is 74*54mm；Material: melt quartz.
Further, described reflecting mirror and chief ray angle on thing square shaft: lower GPI is 28.3 °；Its clear aperture is ellipse: lower GPI is 120*52mm；Material: melt quartz.
Further, the material of described lens L1 is H-LAK7, and its clear aperture is 49mm.
Further, the material of described lens L2 is H-ZF7LA, and its clear aperture is 34mm.
Further, the material of described lens L3 and lens L4 is H-ZK7, and the clear aperture of lens L3 is 42mm, and the clear aperture of lens L4 is 38mm.
Further, the material of described lens L5 is H-ZLAF50B, and its clear aperture is 33mm.
The invention has the beneficial effects as follows:
Present system energy curvature correction spherical aberration and astigmatism and the correction curvature of field and distortion, the depth of field is big, it is simple to rear end optical fiber is focused, and good airproof performance is anti-pollution.
Accompanying drawing explanation
Fig. 1 is optical system light path structure chart of the present invention；
Fig. 2 is the window glass structural representation of the present invention；
Fig. 3 is the lens L1 structural representation of the present invention；
Fig. 4 is the lens L2 structural representation of the present invention；
Fig. 5 is the lens L3 structural representation of the present invention；
Fig. 6 is the lens L4 structural representation of the present invention；
Fig. 7 is the lens L5 structural representation of the present invention.
Number in the figure illustrates: 1, window glass, 2, reflecting mirror, 3, diaphragm, and L1-L5 is lens.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, the present invention is described in detail.
As shown in Figure 1, a kind of industrial endoscope optical system, including window glass 1, reflecting mirror 2, diaphragm 3, battery of lens, and the optical axis that battery of lens is collectively forming, described multiple lens are by the lens L1 being set in turn on optical axis, lens L2, lens L3, lens L4 and lens L5 composition, described optical axis reflects through window glass 1 by reflecting mirror 2, described window glass 1 be arranged in parallel with unreflected optical axis, at lens L1, lens L2, lens L3, a place between lens L4 or lens L5 is provided with diaphragm 3, battery of lens between described diaphragm 3 side and reflecting mirror 2 organizes lens before constituting, for curvature correction spherical aberration and astigmatism, the battery of lens of diaphragm 3 opposite side organizes lens after constituting, dissipate and correct the curvature of field and distortion for producing reversed image.
Before described, group lens include lens L1, described lens L1 is positive light coke simple lens, after described, group lens include the lens L2, lens L3, lens L4 and the lens L5 that from the close-by examples to those far off set gradually from diaphragm 3 side, described lens L2, lens L3, lens L4 and the latter half that lens L5 is double gauss mirror group, and complicate.
Described lens L3, lens L4 and lens L5 are positive light coke normally glued mirror group, and lens L3, lens L4, lens L5 diaphragm 3 all dorsad is arranged so that it is be in not dizzy position, are used for producing reversed image and dissipate.
Described lens L5 near the side of image planes to curvature of the image, in order to correct the curvature of field and distortion.
As in figure 2 it is shown, described window glass 1 and chief ray angle on thing square shaft: lower GPI is 56.6 °；Its clear aperture is ellipse: lower GPI is 74*54mm；Material: melt quartz.
Described reflecting mirror 2 and chief ray angle on thing square shaft: lower GPI is 28.3 °；Its clear aperture is ellipse: lower GPI is 120*52mm；Material: melt quartz.
As it is shown on figure 3, the material of described lens L1 is H-LAK7, its clear aperture is 49mm.
As shown in Figure 4, the material of described lens L2 is H-ZF7LA, and its clear aperture is 34mm.
As shown in Figure 5 and Figure 6, the material of described lens L3 and lens L4 is H-ZK7, and the clear aperture of lens L3 is 42mm, and the clear aperture of lens L4 is 38mm.
As it is shown in fig. 7, the material of described lens L5 is H-ZLAF50B, its clear aperture is 33mm.
Maximum caliber 47mm in battery of lens, object plane to plane mirror center respectively 1470 (on) and 1450 (under), plane mirror center is to lens 55mm.
Thing height 92mm, lower GPI image height 2.68mm, corresponding fiber end face size 3.79*3.79mm.
The principle of the invention
In the present invention, light channel structure meets approximate telecentric beam path in image space, to ensure that each visual-field beam is completely in fibre bundle, wherein:
1) system focal: 45mm；
2) enlargement ratio: 0.02892 (under), single optical fiber bore correspondence object plane 0.3458mm (under)；
3) thing side NA=0.014, image space NA=0.4358 (under), less than fiber numerical aperture 0.63, it is ensured that light is completely into optical fiber.
With above-mentioned parameter, the optical system index that employing present configuration reaches is: object plane is sized to 130 × 130mm, and object plane resolution, less than 2mm, fiber facet size 4 × 4mm, has 400 × 400 optical fiber；True field is image height ± 92mm；Single fibre diameter is 4mm/400=0.01mm；Wave band is 550nm-700nm；Object distance be from object plane to mirror center 1470mm ()；Bundle resolving power fN=57.7lp/mm。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
- null1. an industrial endoscope optical system，Including window glass (1)、Reflecting mirror (2)、Diaphragm (3)、Battery of lens、And the optical axis that battery of lens is collectively forming，It is characterized in that，Described multiple lens are by the lens L1 being set in turn on optical axis、Lens L2、Lens L3、Lens L4 and lens L5 composition，Described optical axis is reflected through window glass (1) by reflecting mirror (2)，Described window glass (1) and unreflected optical axis be arranged in parallel，At lens L1、Lens L2、Lens L3、A place between lens L4 or lens L5 is provided with diaphragm (3)，Battery of lens between described diaphragm (3) side and reflecting mirror (2) organizes lens before constituting，For curvature correction spherical aberration and astigmatism，The battery of lens of diaphragm (3) opposite side organizes lens after constituting，Dissipate and correct the curvature of field and distortion for producing reversed image.
- 2. industrial endoscope optical system according to claim 1, it is characterized in that, before described, group lens include lens L1, described lens L1 is positive light coke simple lens, after described, group lens include the lens L2, lens L3, lens L4 and the lens L5 that from the close-by examples to those far off set gradually from diaphragm (3) side, described lens L2, lens L3, lens L4 and the latter half that lens L5 is double gauss mirror group.
- 3. industrial endoscope optical system according to claim 2, it is characterized in that, described lens L3, lens L4 and lens L5 are positive light coke normally glued mirror group, and lens L3, lens L4, lens L5 diaphragm (3) all dorsad is arranged, it is at not dizzy position, is used for producing reversed image and dissipates.
- 4. industrial endoscope optical system according to claim 3, it is characterised in that described lens L5 near the side of image planes to curvature of the image, in order to correct the curvature of field and distortion.
- 5. industrial endoscope optical system according to claim 1, it is characterised in that described window glass (1) and chief ray angle on thing square shaft: lower GPI is 56.6 °；Its clear aperture is ellipse: lower GPI is 74*54mm；Material: melt quartz.
- 6. industrial endoscope optical system according to claim 1, it is characterised in that described reflecting mirror (2) and chief ray angle on thing square shaft: lower GPI is 28.3 °；Its clear aperture is ellipse: lower GPI is 120*52mm；Material: melt quartz.
- 7. industrial endoscope optical system according to claim 2, it is characterised in that the material of described lens L1 is H-LAK7, its clear aperture is 49mm.
- 8. industrial endoscope optical system according to claim 2, it is characterised in that the material of described lens L2 is H-ZF7LA, its clear aperture is 34mm.
- 9. industrial endoscope optical system according to claim 2, it is characterised in that the material of described lens L3 and lens L4 is H-ZK7, the clear aperture of lens L3 is 42mm, and the clear aperture of lens L4 is 38mm.
- 10. industrial endoscope optical system according to claim 2, it is characterised in that the material of described lens L5 is H-ZLAF50B, its clear aperture is 33mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610328569.XA CN105807418B (en) | 2016-05-18 | 2016-05-18 | A kind of industrial endoscope optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610328569.XA CN105807418B (en) | 2016-05-18 | 2016-05-18 | A kind of industrial endoscope optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105807418A true CN105807418A (en) | 2016-07-27 |
| CN105807418B CN105807418B (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610328569.XA Active CN105807418B (en) | 2016-05-18 | 2016-05-18 | A kind of industrial endoscope optical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116360091A (en) * | 2023-05-31 | 2023-06-30 | 佛山光微科技有限公司 | Optical imaging system of large-view-field high-resolution OCT endoscope |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179226A (en) * | 1994-12-22 | 1996-07-12 | Asahi Optical Co Ltd | Objective optical system for endoscope |
| CN1932573A (en) * | 1996-06-18 | 2007-03-21 | 索尼株式会社 | Optical image recording system, and associated processing system |
| CN103229087A (en) * | 2010-12-15 | 2013-07-31 | 奥林巴斯医疗株式会社 | Endoscope optical system |
| CN103226235A (en) * | 2013-04-22 | 2013-07-31 | 北京首量科技有限公司 | Dual-waveband optical fiber transmission optical system of endoscope lens |
-
2016
- 2016-05-18 CN CN201610328569.XA patent/CN105807418B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179226A (en) * | 1994-12-22 | 1996-07-12 | Asahi Optical Co Ltd | Objective optical system for endoscope |
| CN1932573A (en) * | 1996-06-18 | 2007-03-21 | 索尼株式会社 | Optical image recording system, and associated processing system |
| CN103229087A (en) * | 2010-12-15 | 2013-07-31 | 奥林巴斯医疗株式会社 | Endoscope optical system |
| CN103226235A (en) * | 2013-04-22 | 2013-07-31 | 北京首量科技有限公司 | Dual-waveband optical fiber transmission optical system of endoscope lens |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116360091A (en) * | 2023-05-31 | 2023-06-30 | 佛山光微科技有限公司 | Optical imaging system of large-view-field high-resolution OCT endoscope |
| CN116360091B (en) * | 2023-05-31 | 2023-08-22 | 佛山光微科技有限公司 | Optical imaging system of large-view-field high-resolution OCT endoscope |
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| Publication number | Publication date |
|---|---|
| CN105807418B (en) | 2019-07-09 |
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