CN109407335A - A kind of adjustment device and method of adjustment for lens group adjustment - Google Patents

A kind of adjustment device and method of adjustment for lens group adjustment Download PDF

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Publication number
CN109407335A
CN109407335A CN201811530316.6A CN201811530316A CN109407335A CN 109407335 A CN109407335 A CN 109407335A CN 201811530316 A CN201811530316 A CN 201811530316A CN 109407335 A CN109407335 A CN 109407335A
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China
Prior art keywords
mirror assembly
lens group
light
adjustment
spectroscope
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Granted
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CN201811530316.6A
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Chinese (zh)
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CN109407335B (en
Inventor
何贵明
赵春艳
姚平
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Zhuhai Bright Vision Technology Co Ltd
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Zhuhai Bright Vision Technology Co Ltd
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Priority to CN201811530316.6A priority Critical patent/CN109407335B/en
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/62Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10Beam splitting or combining systems
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/32Fiducial marks and measuring scales within the optical system
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/04Prisms

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)

Abstract

It is a kind of for lens group adjustment adjustment device and method of adjustment, the adjustment device include point light source, cross-graduation plate, the first mirror assembly, the second mirror assembly, third mirror assembly, the first spectroscope, object lens and camera;First mirror assembly, the first spectroscope, object lens and camera are sequentially arranged, and camera is located at the focus of object lens;Point light source, cross-graduation plate and the second mirror assembly are sequentially arranged, lens group to be adjusted is arranged between cross-graduation plate and the second mirror assembly, cross-graduation plate is located in the focus of lens group to be adjusted, the light of second mirror assembly reflectance-transmittance lens group, the light emission through the reflection of the second mirror assembly is to the first spectroscope;A part light splitting directive object lens for the light that first spectroscope reflects the second mirror assembly, another part light form transmitted light path through the first spectroscope.The adjustment mode that the present invention adjusts lens group is simple, quickly and is more convenient for making evaluation to adjustment result.

Description

A kind of adjustment device and method of adjustment for lens group adjustment
Technical field
The present invention relates to vision-based detection and radiographic measurement technical field, especially a kind of adjustment dress for lens group adjustment It sets and method of adjustment.
Background technique
In technical field of vision detection, particularly with high resolution detection, it is desirable that in detection device each detecting instrument it Between must strictly meet a certain known geometrical relationship, while to the aligned relationship requirement between lens group each in detecting instrument Very strict, only precision positioning between lens group has good light axis consistency, just can guarantee the detection essence of detecting instrument Degree, to improve vision-based detection precision.
In the prior art, the adjustment method of adjustment of lens group is needed by accurate mechanical fastening system auxiliary, then by Technical staff with certain lens group adjustment experience manually adjusts, and lens group adjusted is evaluated by final testing result and filled It adjusts and whether meets the requirements.Such mode is time-consuming, and very high to the adjustment skill requirement of adjustment personnel, is difficult to do to adjustment result Unified evaluation out.
Summary of the invention
The present invention provides a kind of adjustment device and method of adjustment for lens group adjustment, adjustment mode is simple, quickly and It is more convenient for making evaluation to adjustment result.
According to the first aspect of the invention, the present invention provides a kind of adjustment device for lens group adjustment, including light Source, cross-graduation plate, the first mirror assembly, the second mirror assembly, third mirror assembly, the first spectroscope, object lens with And camera;First mirror assembly, the first spectroscope, object lens and camera are located in main shaft optical path and are sequentially arranged, described Camera is located at the focus of object lens;The point light source, cross-graduation plate and the second mirror assembly are sequentially set along light incident direction Set, lens group to be adjusted for be arranged between cross-graduation plate and the second mirror assembly, and cross-graduation plate be located to In the focus for adjusting lens group, the second mirror assembly is used for the light of reflectance-transmittance lens group, reflects through the second mirror assembly Light along perpendicular to main shaft optical path the first spectroscope of direction directive;First spectroscope is used for the second mirror assembly is anti- A part light splitting directive object lens for the light penetrated, the light that another part is reflected through the second mirror assembly penetrate first spectroscope To form transmitted light path;The third mirror assembly is located on the transmitted light path and for will transmit through first spectroscope Light reflex to the first spectroscope along the direction for being parallel to transmitted light path, the third mirror assembly includes for placing wait adjust The datum level of whole lens group.
Preferably, first mirror assembly is prism of corner cube or plane mirror.
Preferably, second mirror assembly is pentaprism, right-angle prism or plane mirror.
Preferably, the third mirror assembly further includes the second spectroscope and prism of corner cube, second spectroscope and Datum level is sequentially arranged along transmitted light path, and the prism of corner cube is located on second spectroscopical light splitting optical path.
Preferably, the lens group to be detected forms either single object lens, and lens to be detected by multiple lens Group has unlimited-finite conjugate or finite-infinite conjugate property.
According to the second aspect of the invention, the present invention provides a kind of method of adjustment for lens group adjustment, including as follows Step:
(1) above-mentioned adjustment device is used, the light that the second mirror assembly is arranged in lens group to be adjusted is incident Mouthful, it is sequentially arranged point light source, cross-graduation plate, lens group and the second mirror assembly along optical path;
(2) magazine imaging is observed, when there are when two hot spots not being overlapped, adjust lens group with respect to optical path in imaging Angle and/or longitudinal separation along optical path direction until two hot spots in imaging are overlapped complete the self-correcting of adjustment device It is quasi-;
(3) self-alignment adjustment device will be completed and lens group to be adjusted is placed on datum level by original optical path direction, Observe magazine imaging, when in imaging there are when two hot spots not being overlapped, adjustment lens group with respect to optical path angle, up to Two hot spots in imaging are overlapped, and complete lens group adjustment.
The present invention is based on optical autocollimating principles, it is only necessary to adjust front and back and deflection clip of the lens group to be adjusted along optical path Angle is overlapped the hot spot observed in camera, and the requirement to operator reduces, and keeps adjustment mode simpler.Meanwhile passing through It observes two hot spots whether to be overlapped to determine whether complete the adjustment to lens, more to the evaluation of lens group result adjusted Intuitively.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the adjustment device for lens group adjustment of an embodiment of the present invention;
Fig. 2 is the self calibration light path schematic diagram of the adjustment device for lens group adjustment of an embodiment of the present invention;
Fig. 3 is the adjustment light path schematic diagram of the adjustment device for lens group adjustment of an embodiment of the present invention;
Fig. 4 is the structural schematic diagram of the adjustment device for lens group adjustment of another embodiment of the present invention;
Fig. 5 is the structural schematic diagram of the adjustment device for lens group adjustment of another embodiment of the invention;
Fig. 6 is optical autocollimating schematic diagram.
Specific embodiment
Of the invention so-called " equal " or " identical " refer to it is equal or identical in view of reasonable error, and It is equal or identical in non-absolute sense.Light irradiating angle, reflection angle or refraction angle determined by the present invention are It is centainly lost and there are made when reasonable error in the case that in view of light exists in the medium.Below by specific reality Applying mode combination attached drawing, invention is further described in detail.
The embodiment of the present invention provides a kind of adjustment device for lens group adjustment, as shown in Figure 1 comprising point light source 100, cross-graduation plate 101, the first mirror assembly 5, the second mirror assembly 1, third mirror assembly, the first spectroscope 2, Object lens 3 and camera 7.First spectroscope 2 can be Amici prism, can have opposite light incident direction in point at 45 degree of angles Some light is turn 90 degrees light splitting partially and projected by smooth surface, and another part light then penetrates the first spectroscope 2.First reflection microscope group Part 5, the first spectroscope 2, object lens 3 and camera 7 are sequentially arranged in main shaft optical path, and are coaxially disposed.First mirror assembly 5 Light is reflexed into the first spectroscope 2, the camera 7 is then located at the focal position of object lens 3, will assemble by the light of object lens 3 Onto the camera lens of camera 7, camera 7 shoots the imaging of light.Second mirror assembly 1 is located at the incident light of light On the road, cross-graduation plate 101 is close to the placement of point light source 100, and lens group 102 to be detected is for being placed on the second mirror assembly 1 entrance port adjusts the coke that cross-graduation plate 101 and point light source 100 make cross-graduation plate be located exactly at lens group 102 to be detected At point, the light for being emitted point light source 100 forms directional light after lens group 102 to be detected.Second mirror assembly 1 is used In reflected parallel light, the light through the reflection of the second mirror assembly 1 is along the first spectroscope of direction directive 2 perpendicular to main shaft optical path. A part light splitting directive object lens 3 for the light that first spectroscope 2 is used to reflect the second mirror assembly 1, another part warp The light of second mirror assembly 1 reflection is through first spectroscope 2 to form transmitted light path.Third mirror assembly position In reflexing to the along the direction for being parallel to transmitted light path on the transmitted light path and for will transmit through the light of first spectroscope 2 One spectroscope 2.
Its working principles are as follows: point light source is flat through being formed after lens group 102 to be detected after cross-graduation plate Light is reflected towards the first spectroscope 2 to the second mirror assembly 1, the second mirror assembly 1 by row light emission, and the first spectroscope 2 will Light is divided into two bundles light, and wherein light beam forms first hot spot by object lens 3 in the shooting picture of camera 7.Another part Light passes through 2 directive third mirror assembly of the first spectroscope, and third mirror assembly then includes the second spectroscope 4 and pyramid Prism 6, second spectroscope 4 are located on the transmitted light path of the first spectroscope 2, and the prism of corner cube 6 is located at the second spectroscope 4 Reflected light path on, a part of the light by the reflection of the second mirror assembly 1 is through the first spectroscope 2 and directive second divides Light microscopic 4, the second spectroscope 4 by light spectral transmission to lens group datum clamp face 8 to be adjusted, the light reflected through datum level 8 It is again passed through the second spectroscope 4,2 rear portion light of the first spectroscope reflexes to the first mirror assembly 5, the first reflection microscope group Light is reflexed to the first spectroscope 2 by part 5, and some light penetrates the first spectroscope 2, by directive camera 7 after object lens 3, Second hot spot is formed in the shooting picture of camera 7.Based on optical autocollimating principle, if lens group optical axis and datum clamp face Level, the first hot spot and the second hot spot are necessarily overlapped, can judge in this way lens group and datum clamp face whether water It is flat.
The embodiment of the adjustment device of said lens group adjustment is that the structure of default adjustment device has been assembled rationally, is actually made With in the process, the problem of reduction in order to prevent because of the measurement accuracy caused by the error of device itself, it should exchange engagement positions into Row self calibration.
On the basis of a upper embodiment, the adjustment device of above-described embodiment is acted on into self-calibrating device.As shown in Fig. 2, The light that point light source 100 issues passes through cross-graduation plate 101, then through formation directional light after lens group 102 to be detected and penetrates To the second mirror assembly 1, the second mirror assembly 1 is for directional light to be turn 90 degrees partially, along the direction perpendicular to main shaft optical path Light is divided into two bundles light by the first spectroscope of directive 2, the first spectroscope 2, and wherein light beam is by object lens 3, in the shooting of camera 7 First hot spot is formed on picture.Another part light passes through 2 directive third mirror assembly of the first spectroscope, third reflection Mirror assembly then includes the second spectroscope 4 and prism of corner cube 6, and second spectroscope 4 is located at the transmitted light path of the first spectroscope 2 On, the prism of corner cube 6 is located on the reflected light path of the second spectroscope 4, and one of the light by the reflection of the second mirror assembly 1 Part is through the first spectroscope 2 and the second spectroscope of directive 4, and the second spectroscope 4 is by light dichroic reflection to prism of corner cube 6, angle Light is reflexed to the second spectroscope 4 by cone prism 6, and light is reflexed to the first spectroscope 2, the first spectroscope 2 by the second spectroscope 4 Reflection light reach the reflective light after the first mirror assembly 5 and again pass by the first spectroscope 2, some light penetrates First spectroscope 2 forms second hot spot by directive camera 7 after object lens 3 in the shooting picture of camera 7.
Based on optical autocollimating principle, if each structure member assembles rationally, the first hot spot and the second hot spot are inevitable It is overlapped, can judge whether self-calibrating device assembles rationally in this way.If the first hot spot and the second hot spot are not overlapped, It then needs to be adjusted each structure member.For before being adjusted lens group, carrying out exchanging engagement positions progress Self calibration, while air agitation is excluded, to promote Adjustment precision.
On the basis of the above embodiments, first mirror assembly 5 can be prism of corner cube or plane mirror.Institute Stating the second mirror assembly 1 can be pentaprism, right-angle prism or plane mirror, as shown in figure 3, the second mirror assembly 1 For pentaprism, the light that point light source 100 issues passes through cross-graduation plate 101, then flat through being formed after lens group 102 to be detected Row light and the second mirror assembly of directive 1, the second mirror assembly 1 is for directional light to be turn 90 degrees partially.As shown in figure 4, second Mirror assembly 1 is plane mirror 11, and plane mirror 11 and main shaft optical path are in 45 degree of angles, and the incident angle of directional light is 45 degree.As shown in figure 5, the second mirror assembly 1 is right-angle prism 12, light is injected from the right-angle surface of right-angle prism 12, then from Another right-angle surface projects, and incident angle of the directional light on inclined-plane is 45 degree.
Object lens 3 are the lens group of single object lens or multiple lens composition, and have unlimited-finite conjugate characteristic.
Lens group 102 to be detected can be the lens group or single object lens that multiple lens form, and with unlimited-limited Conjugation or finite-infinite conjugate property.
Fig. 6 illustrates optical autocollimating principle and is formed through object lens flat after light is by being located at the graticle of focal plane of lens Row light.Directional light is reflected by the reflecting mirror perpendicular to optical axis, then by forming graticle graticule after object lens on focal plane As being overlapped with graticule.As soon as reflected light beam tilts 2 angles α when the mirror tilt minute angle angle α.
The embodiment of the present invention also provides a kind of method of adjustment for lens group adjustment, includes the following steps:
(1) using the adjustment device in any one of the above embodiment, by lens group setting to be adjusted in the second reflection The light entrance port of mirror assembly is sequentially arranged point light source, cross-graduation plate, lens group and the second mirror assembly along optical path;
(2) magazine imaging is observed, when there are when two hot spots not being overlapped, adjust lens group with respect to optical path in imaging Angle and longitudinal separation along optical path direction complete the self calibration of adjustment device until two hot spots in imaging are overlapped, say Bright equipment at this time has excluded air agitation influence, can be used normally;
(3) self-alignment device and lens group to be adjusted will be completed and is placed on lens group base to be installed by original optical path order On quasi- face, magazine imaging is observed, when there are when two hot spots not being overlapped, adjust angle of the lens group with respect to optical path in imaging Degree completes lens group adjustment until two hot spots in imaging are overlapped.
The above content is specific embodiment is combined, further detailed description of the invention, and it cannot be said that this hair Bright specific implementation is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, it is not taking off Under the premise of from present inventive concept, a number of simple deductions or replacements can also be made.

Claims (7)

1. a kind of adjustment device for lens group adjustment, it is characterised in that:
Including point light source, cross-graduation plate, the first mirror assembly, the second mirror assembly, third mirror assembly, first point Light microscopic, object lens and camera;First mirror assembly, the first spectroscope, object lens and camera are located in main shaft optical path and suitable Secondary setting, the camera are located at the focus of object lens;The point light source, cross-graduation plate and the second mirror assembly are along light incidence Direction is sequentially arranged, and lens group to be adjusted is for being arranged between cross-graduation plate and the second mirror assembly, and cross point For reticle plate in the focus of lens group to be adjusted, the second mirror assembly is used for the light of reflectance-transmittance lens group, through the second reflection The light of mirror assembly reflection is along the first spectroscope of direction directive perpendicular to main shaft optical path;First spectroscope is used for anti-by second The a part for penetrating the light of mirror assembly reflection is divided directive object lens, described in the light transmission that another part is reflected through the second mirror assembly First spectroscope is to form transmitted light path;The third mirror assembly is located on the transmitted light path and is used to will transmit through described First spectroscopical light reflexes to the first spectroscope along the direction for being parallel to transmitted light path, and the third mirror assembly includes using In the datum level for placing lens group to be adjusted.
2. adjustment device according to claim 1, it is characterised in that:
First mirror assembly is prism of corner cube or plane mirror.
3. adjustment device according to claim 1, it is characterised in that:
Second mirror assembly is pentaprism, right-angle prism or plane mirror.
4. adjustment device according to claim 1, it is characterised in that:
The third mirror assembly further includes the second spectroscope and prism of corner cube, and second spectroscope and datum level are along transmission Optical path is sequentially arranged, and the prism of corner cube is located on second spectroscopical light splitting optical path.
5. adjustment device according to claim 1-4, it is characterised in that:
The object lens 3 are the lens group of single object lens or multiple lens composition, and have unlimited-finite conjugate characteristic.
6. adjustment device according to claim 1-4, it is characterised in that:
The lens group to be detected forms either single object lens by multiple lens, and lens group to be detected have it is unlimited- Finite conjugate or finite-infinite conjugate property.
7. a kind of method of adjustment for lens group adjustment, which comprises the steps of:
(1) adjustment device described in any one of claims 1-6 is used, lens group setting to be adjusted is reflected into microscope group second The light entrance port of part is sequentially arranged point light source, cross-graduation plate, lens group and the second mirror assembly along optical path;
(2) magazine imaging is observed, when there are when two hot spots not being overlapped, adjust angle of the lens group with respect to optical path in imaging It spends and/or completes the self calibration for adjusting device until two hot spots in imaging are overlapped along the longitudinal separation of optical path direction;
(3) self-alignment adjustment device will be completed and lens group to be adjusted is placed sequentially on datum level by original optical path direction, Observe magazine imaging, when in imaging there are when two hot spots not being overlapped, adjustment lens group with respect to optical path angle, up to Two hot spots in imaging are overlapped, and complete lens group adjustment.
CN201811530316.6A 2018-12-14 2018-12-14 Adjusting device and adjusting method for adjusting lens group Active CN109407335B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109975990A (en) * 2019-05-09 2019-07-05 珠海博明视觉科技有限公司 A kind of 4f system device for precision regulating and adjusting method
CN111230857A (en) * 2019-03-05 2020-06-05 南昌工程学院 Target positioning and grabbing based on machine vision and deep learning
CN113064286A (en) * 2021-03-25 2021-07-02 中国科学院上海天文台 K mirror detection device with help of pentagonal prism and installation and adjustment method thereof
CN114296251A (en) * 2021-11-11 2022-04-08 中航洛阳光电技术有限公司 Method for adjusting consistency of optical axes of multi-light-path lens
CN114326138A (en) * 2022-01-05 2022-04-12 中国工程物理研究院激光聚变研究中心 High-precision rotating table optical axis assembling and adjusting method

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US20160119612A1 (en) * 2014-10-27 2016-04-28 Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V. Method of and apparatus for optically determining positions and orientations of mirrors
CN205679898U (en) * 2016-08-12 2016-11-09 深圳市佶达德科技有限公司 The optical axis adjustable device of a kind of video camera and optical axis adjusting system
CN209198785U (en) * 2018-12-14 2019-08-02 珠海博明视觉科技有限公司 A kind of adjustment device for lens group adjustment

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Publication number Priority date Publication date Assignee Title
JP2000193415A (en) * 1998-12-28 2000-07-14 Nikon Corp Optical path length adjusting device and eccentricity measuring instrument using it
US20160119612A1 (en) * 2014-10-27 2016-04-28 Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V. Method of and apparatus for optically determining positions and orientations of mirrors
CN205679898U (en) * 2016-08-12 2016-11-09 深圳市佶达德科技有限公司 The optical axis adjustable device of a kind of video camera and optical axis adjusting system
CN209198785U (en) * 2018-12-14 2019-08-02 珠海博明视觉科技有限公司 A kind of adjustment device for lens group adjustment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111230857A (en) * 2019-03-05 2020-06-05 南昌工程学院 Target positioning and grabbing based on machine vision and deep learning
CN109975990A (en) * 2019-05-09 2019-07-05 珠海博明视觉科技有限公司 A kind of 4f system device for precision regulating and adjusting method
CN113064286A (en) * 2021-03-25 2021-07-02 中国科学院上海天文台 K mirror detection device with help of pentagonal prism and installation and adjustment method thereof
CN114296251A (en) * 2021-11-11 2022-04-08 中航洛阳光电技术有限公司 Method for adjusting consistency of optical axes of multi-light-path lens
CN114326138A (en) * 2022-01-05 2022-04-12 中国工程物理研究院激光聚变研究中心 High-precision rotating table optical axis assembling and adjusting method
CN114326138B (en) * 2022-01-05 2023-06-13 中国工程物理研究院激光聚变研究中心 Optical axis adjustment method for high-precision rotary table

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