CN104931239B - A kind of MTF test device and method for small-sized off-axis optical system - Google Patents
A kind of MTF test device and method for small-sized off-axis optical system Download PDFInfo
- Publication number
- CN104931239B CN104931239B CN201510320716.4A CN201510320716A CN104931239B CN 104931239 B CN104931239 B CN 104931239B CN 201510320716 A CN201510320716 A CN 201510320716A CN 104931239 B CN104931239 B CN 104931239B
- Authority
- CN
- China
- Prior art keywords
- mtf
- plane mirror
- optical
- rotating mechanism
- detection system
- Prior art date
- 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.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 238000012545 processing Methods 0.000 claims description 5
- 238000011079 streamline operation Methods 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The present invention proposes a kind of MTF test device and method for small-sized off-axis optical system, which is mainly made of parallel light tube, MTF detection system, plane mirror and Two Dimensional Rotating mechanism；Wherein Two Dimensional Rotating mechanism and plane mirror are rigidly connected；Parallel light tube and MTF detection system are located in same optical axis, and plane mirror is positioned there between.Testing and debugging mechanism can be made greatly simplified using the present invention, convenient for operation, and plane mirror and optical system to be measured be formed into a test module, be particularly easy to carry out a series of optical property modular testings, streamline operation improves testing efficiency.
Description
Technical field
The invention belongs to field of optical measuring technologies, in particular to a kind of MTF for small-sized off-axis optical system is tested
Device and method.
Background technique
As the processing technologys such as injection molding, turning are constantly progressive, complex free curved surface prism structure is answered by more and more extensive
In Optical System Design, this structure is often off-axis asymmetric.And the machinery adjustment of common MTF test equipment
Structure both for coaxial-symmetrical optical system, parallel light tube, camera lens to be measured and detection system in same optical axis, be used into
The adjustment device of row visual field angular measurement low-angle can only also adjust in one-dimensional direction, can not directly carry out incident light axis and outgoing
Optical axis has the off-axis optical system of wide-angle angle to measure；And difference field angle MTF is measured also primarily directed to one-dimensional square
Visual field can represent the rotational symmetry optical system of entire image planes, can not adopt to each visual field point of asymmetric system
Sample.To complete off-axis asymmetric free curved surface prism measurement using existing MTF test equipment, two can be carried out by needing to construct
The mechanical adjusting mechanism that rotates of dimension direction, the adjustment mechanism is due to while completing two-dimensional directional rotation, it is also necessary to carrying to
The machinery adjustment frame of photometry system and MTF detection system and MTF detection system itself, so volume is big, structure is complicated,
Expense is also relatively high.
Summary of the invention
In view of this, the present invention aiming at the problems existing in the prior art, proposes one kind for small-sized off-axis optical system
MTF test device and method, testing and debugging mechanism can be made greatly simplified using the present invention, convenient for operation, and will put down
Face reflecting mirror and optical system to be measured form a test module, are particularly easy to carry out a series of optical property modular testings,
Streamline operation improves testing efficiency.
Realize that technical scheme is as follows:
A kind of MTF test device for small-sized off-axis optical system, mainly by parallel light tube, MTF detection system, plane
Reflecting mirror and Two Dimensional Rotating mechanism are constituted；Wherein Two Dimensional Rotating mechanism and plane mirror are rigidly connected；Parallel light tube and MTF are visited
Examining system is located in same optical axis, and plane mirror is positioned there between.
The diameter of plane mirror of the present invention should meet the optical path for not blocking optical system to be measured when rotated.Plane reflection
The processing face shape error of mirror should meetWherein θ is plane mirror normal and incident light axis angle, W
(x, y) is under the premise of meeting certain measuring accuracy, and systematic error distributes to the wavefront error of plane mirror.
A kind of MTF test method for small-sized off-axis optical system, specific steps are as follows:
MTF test device is arranged in step 1；
The test device is mainly made of parallel light tube, MTF detection system, plane mirror and Two Dimensional Rotating mechanism；
Wherein Two Dimensional Rotating mechanism and plane mirror are rigidly connected；Parallel light tube and detection system are located in same optical axis, and plane is anti-
It penetrates mirror, Two Dimensional Rotating mechanism and optical system to be measured and constitutes light of the test module between parallel light tube and MTF detection system
Lu Zhong；
Step 2, module post-concentration utilizes Two Dimensional Rotating mechanism into MTF detection system to parallel light tube emergent light after tested
The placed angle of plane mirror in the optical path is adjusted, realizes that the different field angles of light are incident in optical system to be measured, and protect
The incident light axis for demonstrate,proving test module is parallel with emergent light axis；
Step 3, optical signal tests out the MTF of optical system to be measured to MTF detection system based on the received.
Beneficial effect
The present invention utilizes Two Dimensional Rotating institutional adjustment plane mirror, and adjustment reaches the incidence angle of the light of examining system, real
The incident light axis of existing test module is parallel with emergent light axis, carries out MTF amount, the dress to examining system difference field angle to realize
It is simple to set structure, it is small in size and at low cost, it is easily formed a module, is applied in other optical parameter measurements.
Detailed description of the invention
Fig. 1 is schematic diagram of the present invention for the MTF test device of small-sized off-axis optical system；
Fig. 2 is the schematic diagram that MTF test device proposed by the present invention is used for free curved surface prism MTF test；Wherein: 1 is flat
Row light pipe, 2 optical systems to be measured, 3MTF detection system, 4 plane mirrors, 5 Two Dimensional Rotating mechanisms, 6 test modules, 7 be to be measured
Off-axis asymmetric free curved surface prism.
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of MTF test device for small-sized off-axis optical system, is mainly visited by parallel light tube 1, MTF
Examining system 3, plane mirror 4 and Two Dimensional Rotating mechanism 5 are constituted；Wherein Two Dimensional Rotating mechanism 5 connects with 4 rigidity of plane mirror
It connects；Parallel light tube 1 and MTF detection system 3 are located in same optical axis, and plane mirror 5 is positioned there between.
The working principle of the method for the present invention are as follows: optical system 2 to be measured is placed into the MTF test device 3 and parallel light tube 1
In the optical system for testing of composition, and test module 6 is constituted with plane mirror 4, plane mirror 4 is turned back optical system 2 to be measured
Optical path, so that test module 6 forms a common optical axis optical system；Parallel light tube 1 issues directional light, by test module 6, meeting
Gather in MTF detection system 3, for the resolving of focused light spot, it can be deduced that the MTF of optical system to be measured；Two Dimensional Rotating mechanism 5
Rotation of the plane mirror 4 on the two-dimensional direction of space can be driven, the sampling of different visual field points is carried out, to complete different views
Optical system MTF test under rink corner.
Two Dimensional Rotating mechanism 5 of the present invention is that by the adjustment mechanism for tilting, rotating on the two-dimensional direction of space, can
To be to manually adjust to be also possible to adjust automatically, this method implementation is not influenced.
Test module 6 of the present invention is not only used in MTF test, is also used as an entirety, applies at it
In its optical performance test equipment.
The diameter of plane mirror of the present invention should meet the optical path for not blocking optical system to be measured when rotated.Plane reflection
The processing face shape error of mirror should meetWherein θ is plane mirror normal and incident light axis angle, W
(x, y) is under the premise of meeting certain measuring accuracy, and systematic error distributes to the wavefront error of plane mirror.
A kind of MTF test method for small-sized off-axis optical system of the present invention, specific steps are as follows:
MTF test device is arranged in step 1；
The test device is mainly by parallel light tube 1,5 structure of MTF detection system 3, plane mirror 4 and Two Dimensional Rotating mechanism
At；Wherein Two Dimensional Rotating mechanism 5 and plane mirror 4 are rigidly connected；Parallel light tube 1 and MTF detection system 3 are located at same optical axis
On, plane mirror 4, Two Dimensional Rotating mechanism 5 and optical system 2 to be measured constitute test module 6 and are located at parallel light tube 1 and MTF spy
In optical path between examining system 3；
Step 2,6 post-concentration of module utilizes Two Dimensional Rotating into MTF detection system 3 to 1 emergent light of parallel light tube after tested
Mechanism 5 adjusts the placed angle of plane mirror 4 in the optical path, realizes that the different field angles of light are incident on optical system 2 to be measured
In, and guarantee that the incident light axis of test module 6 is parallel with emergent light axis；
Step 3, optical signal tests out the MTF of optical system 2 to be measured to MTF detection system 3 based on the received.
Example: examining system is asymmetric free curved surface prism,
As shown in Fig. 2, parallel light tube 1 and MTF detection system 3, in same optical axis, test module 6 is placed between
Optical path in；Test module 6 is by off-axis asymmetric free curved surface prism 7, plane mirror 4 and Two Dimensional Rotating mechanism to be measured
5 are constituted；Two Dimensional Rotating mechanism 5 and plane mirror 4 are rigidly connected.
The off-axis emergent light axis of asymmetric free curved surface prism 7 and the angle of incident light axis to be measured are 2 θ, then need to put down
The placed angle of face reflecting mirror 4 is normal direction and horizontal direction angle is θ, so that off-axis asymmetric free form surface rib to be measured
The incident light axis of mirror 7 is parallel with emergent light axis；The bore of plane mirror 4 is sufficiently large simultaneously, not to off-axis asymmetric freedom
The optical path of curved surface prism 7 causes to block.The processing face shape error of plane mirror 4 should meetW(x,y)
Under the premise of meeting certain measuring accuracy, systematic error distributes to the wavefront error of plane mirror.
Parallel light tube 1 issues directional light and is focused in MTF detection system 3, by test module 6 for focused light spot
It resolves, it can be deduced that the MTF of off-axis asymmetric free curved surface prism 7；Two Dimensional Rotating mechanism 5 can drive plane mirror 4 to exist
Rotation on the two-dimensional direction of space, carries out the sampling of different visual field points, to complete off-axis asymmetric freedom under different field angles
The MTF of curved surface prism 7 is tested.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510320716.4A CN104931239B (en) | 2015-06-12 | 2015-06-12 | A kind of MTF test device and method for small-sized off-axis optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510320716.4A CN104931239B (en) | 2015-06-12 | 2015-06-12 | A kind of MTF test device and method for small-sized off-axis optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104931239A CN104931239A (en) | 2015-09-23 |
| CN104931239B true CN104931239B (en) | 2018-12-21 |
Family
ID=54118512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510320716.4A Active CN104931239B (en) | 2015-06-12 | 2015-06-12 | A kind of MTF test device and method for small-sized off-axis optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104931239B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192536B (en) * | 2017-04-19 | 2019-06-07 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | It is a kind of without burnt conjugated optical channels MTF test device and test method |
| CN110411716B (en) * | 2019-08-05 | 2021-03-16 | 昆明北方红外技术股份有限公司 | Method for measuring optical transfer function of U-shaped deflection thermal imager |
| CN111812605B (en) * | 2020-08-18 | 2025-07-08 | 珠海市华亚智能科技有限公司 | Automatic coupling equipment for vehicle-mounted laser radar |
| CN112179629B (en) * | 2020-09-29 | 2021-07-09 | 北京理工大学 | Method for measuring virtual scene field angle of virtual display equipment |
| CN112880975B (en) * | 2021-01-14 | 2023-01-24 | 歌尔股份有限公司 | Modulation transfer function testing device |
| CN113340424B (en) * | 2021-06-18 | 2022-09-27 | 上海国科航星量子科技有限公司 | Device and method for detecting performance of polarized light |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203364837U (en) * | 2013-07-11 | 2013-12-25 | 中国科学院西安光学精密机械研究所 | Multi-target scenery simulation system with super-large field of view |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0618448A (en) * | 1992-07-02 | 1994-01-25 | Fujitsu Ltd | MTF measuring device for X-ray optical system |
| JP2004037410A (en) * | 2002-07-08 | 2004-02-05 | Yucaly Optical Laboratory Inc | Modulation transfer function measuring apparatus and modulation transfer function measuring method |
| CN201043930Y (en) * | 2006-12-08 | 2008-04-02 | 中国科学院上海光学精密机械研究所 | Optical system modulation transfer function measuring instrument |
| CN102735429B (en) * | 2012-06-13 | 2014-08-20 | 中国科学院长春光学精密机械与物理研究所 | Equipment for CCD (Charge Coupled Device) modulation transfer function test and testing method of equipment |
| CN104122072A (en) * | 2013-04-29 | 2014-10-29 | 鸿富锦精密工业（深圳）有限公司 | Lens module detection apparatus |
-
2015
- 2015-06-12 CN CN201510320716.4A patent/CN104931239B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203364837U (en) * | 2013-07-11 | 2013-12-25 | 中国科学院西安光学精密机械研究所 | Multi-target scenery simulation system with super-large field of view |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104931239A (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104931239B (en) | A kind of MTF test device and method for small-sized off-axis optical system | |
| CN105091792B (en) | A kind of device and its scaling method for demarcating many optical axis system optical axis depth of parallelisms | |
| CN105424322B (en) | Self calibration plain shaft parallelism detector and detection method | |
| CN100451540C (en) | Device for detecting three-axle parallel of large photoelectric monitoring equipment using thermal target technology | |
| CN204831226U (en) | A optics light path for detection lens center is inclined to one side and optical detection device thereof | |
| TW202210807A (en) | Optical Sample Characterization | |
| CN109870294B (en) | A large-scale diameter expansion optical axis parallelism detection device | |
| CN102607472B (en) | Measuring device and measuring method for large-range flatness | |
| CN102564343A (en) | Detection device for surface-shape errors of solar trench type curved surface reflector | |
| CN107941477A (en) | Spectroscope measuring method and device capable of accurately controlling incident angle | |
| CN106918309B (en) | Measuring device and method for measuring the deviation angle between the normal line of the light-transmitting surface of an electro-optic crystal and the Z-axis | |
| CN204854657U (en) | Mark many optical axises optical system parallelism of optical axes's device | |
| CN104567752A (en) | Stray light elimination dual-optical-path optical centering instrument | |
| CN106918310B (en) | Non-contact electro-optic crystal light-transmitting surface normal and Z-axis deviation angle measuring device and its measuring method | |
| CN203688919U (en) | Infrared/visible dual-waveband photoelectric auto-collimation system | |
| CN111811782A (en) | A detection device and method for a space debris ranging imaging composite optical system | |
| CN105783788A (en) | Multi-axis parallelism detection device with large-range expanding and self-checking functions | |
| CN103196552B (en) | Measuring device for light intensity of narrow-light-beam light-emitting diode (LED) lamp | |
| CN108132142A (en) | Detection device and method for large-caliber reflection optical system | |
| CN103941415B (en) | The method of debuging fast of reflective concentric optical system | |
| CN105092212B (en) | Array corner reflector pointing accuracy measurement system and method | |
| CN209198785U (en) | An adjustment device for lens group adjustment | |
| CN104280218A (en) | Large field of view full band target simulation test system | |
| CN103698897B (en) | Infrared/visible dual-waveband photoelectric auto-collimation system | |
| CN109991712A (en) | Device and method for adjusting U-shaped turning optical path |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |