CN106370397A - Method and device for measuring modulation transfer function of telephoto lens through concave mirror imaging - Google Patents
Method and device for measuring modulation transfer function of telephoto lens through concave mirror imaging Download PDFInfo
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- CN106370397A CN106370397A CN201610754385.XA CN201610754385A CN106370397A CN 106370397 A CN106370397 A CN 106370397A CN 201610754385 A CN201610754385 A CN 201610754385A CN 106370397 A CN106370397 A CN 106370397A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0292—Testing optical properties of objectives by measuring the optical modulation transfer function
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Abstract
The invention relates to a method for measuring a modulation transfer function of a telephoto lens through concave mirror imaging, and a device for realizing the method. The method comprises the following steps: 1) arranging a light source, a light uniform plate and a reticle at an image side of a detected lens; 2) arranging a concave reflection mirror at an object side of the detected lens; 3) distributing a plurality of image sensors on a focal plane of the concave reflection mirror; 4) adjusting the position of the reticle and the position of the detected lens until the reticle is arranged in the focal plane of the detected lens; 5) calculating MTF values corresponding to different line pair densities through corresponding digital image processing units; and 6) generating a modulation transfer function curve of the detected lens through an MTF data analyzer. The method and device adopt a mode that a plurality of image sensors share one concave reflection mirror as the optical imaging lens, can be used for small-field-angle telephoto lens multi-point modulation transfer function measurement, not only are fast in measurement speed, but also solve the problem that the small-field-angle telephoto lens cannot be measured due to structure interference of a plurality of optical lenses.
Description
Technical field
The present invention relates to field of photoelectric integration, modulate transmission letter particularly to a kind of concave mirror imaging measurement telephoto lens
The method of number and device for implementing the method.
Background technology
The modulation transfer function (MTF) measurement of telephoto lens, current method is in difference using same collimation camera
Angle position, is located at the pattern in measured lens head portrait face with amplifying method measurement, is passed by the image that data analysiss obtain tested camera lens
The modulation transfer function (MTF) of each position of sensor face.Using the method typical products be German trioptics imagemaster
universal.During using this product measurement optical lens, need the angle of the mobile collimation relatively tested camera lens of camera extremely
Start behind precalculated position to measure.When position to be measured is more, mobile and adjustment time is longer, leads to time of measuring to be up to
Several tens minutes are it is impossible to adapt to the requirement of batch production.
Separately there is the target surface that Chinese patent cn104122077a is with multiple digital cameras tested camera lens of survey calculation simultaneously
The modulation transfer function (MTF) of diverse location.And because each digital camera has independent optical lens and sensor, two numerals
The minimum angle being formed between video camera is restricted by optical lens mechanical dimension.Rui Jingda Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017 profit at present
The product researched and developed with this patent, the minimum angle of visual field can only measure 28 ° it is impossible to meet the telephoto lens of measurement such as focal length 500mm
The requirement of as little as 1 ° of the required minimum angle of visual field.
Content of the invention
It is an object of the invention to overcoming disadvantage mentioned above, provide a kind of concave mirror imaging measurement telephoto lens modulation transmission letter
The method of number and device for implementing the method, the method and device adopt multiple images sensor to share a concave reflection
Mirror, as optical imaging lens, can be used for the measurement of the modulation transfer function (MTF) of small field of view angular length zoom lens multi-point, not only measures
Speed is fast, and solves and lead to what small field of view angular length zoom lens cannot measure to ask due to the constructive interference of multiple optical lens
Topic.
The technical scheme is that be achieved in that:
(1) scheme one:
A kind of method of concave mirror imaging measurement telephoto lens modulation transfer function (MTF) it is characterised in that: the method include with
Lower step:
1. light source, even tabula rasa and graticle are placed on image space side the incident light axis along tested camera lens of tested camera lens
Direction draws near and lays successively, described graticle is carved with multigroup meridian from not collinear pair to and black and white from the sagitta of arc to arrangement
The detectability unit pattern of fine rule composition；
2. by a focal length be more than tested lens focus concave mirror be placed on tested camera lens object space side so that
Concave mirror and tested camera lens cooperatively form amplification light path, and the reflecting surface of described concave mirror is towards tested camera lens and concave surface
The optical axis of reflecting mirror is in will not be by the knot of tested camera lens after the angle of inclination setting makes light line reflection with the optical axis of tested camera lens
Structure is blocked；
3. multiple images sensor is distributed on the focal plane of concave mirror according to the measurement requirement of tested camera lens, will be each
Individual imageing sensor is connected one to one with each digital image processing unit on mtf data analyzer respectively；
4. adjustment graticle and the relative position of tested camera lens, are located at the focal plane of tested camera lens, to protect up to graticle
Demonstrate,prove the image that the directional light producing by tested camera lens forms clearly detectability unit pattern on the image sensor；
5. each digital image processing unit is chosen respectively and is located at the one of center on coupled imageing sensor
The image of individual detectability unit pattern, calculates not collinear mtf value corresponding to density according to this image；
6. mtf data analyzer is according to each imageing sensor place view position and each digital image processing unit
The mtf value calculating, generate meridian on different visual angles position for the tested camera lens to the sagitta of arc to modulation transfer function (MTF) curve.
In order to reduce volume, the present invention has done and has improved further: sets between described concave mirror and imageing sensor
Put plane mirror and bending is carried out to light path.
As a kind of preferred scheme, the optical axis of described concave mirror after plane mirror bending with tested camera lens
Optical axis is parallel.
As a kind of preferred scheme, the focal length of described concave mirror is 4～10 times of tested lens focus.
In order to be able to the impact to measurement for the aberration such as effective curvature of field reducing concave mirror, each described image sensor phase
Position Independent adjustable to concave mirror.
(2) scheme two:
A kind of device of the method for realizing concave mirror imaging measurement telephoto lens modulation transfer function (MTF), this device includes
Tested camera lens and be arranged at measured lens head portrait side side and the incident light axis direction along tested camera lens and draw near and lay successively
Light source, even tabula rasa and graticle, described graticle is carved with multigroup meridian from not collinear pair to and the sagitta of arc black to arrangement
The detectability unit pattern of white fine rule composition, this device also includes adjusting for the position adjusting the relatively tested lens location of graticle
Engagement positions, be arranged at tested camera lens object space side for cooperatively forming, with tested camera lens, the concave mirror, many amplifying light path
The individual measurement requirement according to tested camera lens be distributed in imageing sensor on the focal plane of concave mirror and respectively with each figure
The mtf data analyzer being connected as sensor, the focal length of described concave mirror is more than the focal length of tested camera lens, described concave surface
Towards tested camera lens and the optical axis of concave mirror is in the angle of inclination setting with the optical axis of tested camera lens to the reflecting surface of reflecting mirror,
Described mtf data analyzer is provided with the digital image processing unit that quantity is matched with imageing sensor, each image sensing
Device is connected one to one with each digital image processing unit on mtf data analyzer respectively.
In order to reduce volume, the present invention has done and has improved further: this device also includes being arranged at concave mirror and image
The plane mirror for light path is carried out with bending between sensor.
As a kind of preferred scheme, the optical axis of described concave mirror after plane mirror bending with tested camera lens
Optical axis is parallel.
As a kind of preferred scheme, the focal length of described concave mirror is 4～10 times of tested lens focus.
In order to be able to the impact to measurement for the aberration such as effective curvature of field reducing concave mirror, each described image sensor phase
Position Independent adjustable to concave mirror.
For prior art, the invention has the advantages that
(1) present invention provide the method for concave mirror imaging measurement telephoto lens modulation transfer function (MTF) and be used for realizing the party
The device of method, shares a concave mirror as optical imaging lens using multiple images sensor, can be used for neglecting rink corner
The measurement of the modulation transfer function (MTF) of telephoto lens multi-point, not only measuring speed is fast, and solves due to multiple optical lens
Constructive interference lead to the problem that small field of view angular length zoom lens cannot measure；
(2) present invention provide the method for concave mirror imaging measurement telephoto lens modulation transfer function (MTF) and be used for realizing the party
The device of method, compared with the product such as imagemaster universal of existing measurement telephoto lens modulation transfer function (MTF), by
In the scheme using multiple images sensor and digital image processing unit, can measure simultaneously tested telephoto lens target surface many
The modulation transfer function (MTF) of point position it is not necessary to the action of position movement so that the one-shot measurement time be reduced to from dozens of minutes several
Second, can be applicable to batch production batch production；
(3) present invention provide the method for concave mirror imaging measurement telephoto lens modulation transfer function (MTF) and be used for realizing the party
The device of method, compared with the technology described by with patent cn104122077a, the present invention shares one due to multiway images sensor
Concave mirror as optical imaging lens, need not multiple optical lens, be not only simple in structure, low cost of manufacture, and do not have
The constructive interference of multiple optical lens, can be used for measuring the modulation transfer function (MTF) neglecting rink corner, telephoto lens；
(4) present invention provide the method for concave mirror imaging measurement telephoto lens modulation transfer function (MTF) and be used for realizing the party
The device of method, carries out bending due to employing plane mirror to light path, reduces the volume of whole measurement apparatus, do not only take up
Space is little, and low cost of manufacture；
(5) present invention provide the method for concave mirror imaging measurement telephoto lens modulation transfer function (MTF) and be used for realizing the party
The device of method, due to the position Independent adjustable of each imageing sensor opposed concave reflecting mirror, can make imageing sensor as far as possible
Ground, close to the focal plane of concave mirror, effectively reduces the impact to measurement for the aberrations such as the curvature of field of concave mirror, makes measurement result
More accurate.
Brief description
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings:
Fig. 1 is the index path of the method for concave mirror imaging measurement telephoto lens modulation transfer function (MTF) of the present invention；
Fig. 2 is that the present invention is used for realizing the structure of the device of concave mirror imaging measurement telephoto lens modulation transfer function (MTF) method
Schematic diagram；
Fig. 3 is the schematic diagram of several distribution mode of imageing sensor；
Fig. 4 is the schematic diagram of one of which detectability unit pattern of the present invention.
In figure symbol description: 1, light source, 2, even tabula rasa, 3, graticle, 4, tested camera lens, 5, concave mirror, 6, image
Sensor, 7, mtf data analyzer, 71, digital image processing unit, 8, plane mirror.
Specific embodiment
With reference to Figure of description and specific embodiment, present invention is described in detail:
(1) specific embodiment one:
As Figure 1-4, a kind of side of the concave mirror imaging measurement telephoto lens modulation transfer function (MTF) providing for the present invention
Method, the method comprises the following steps:
1. light source 1, even tabula rasa 2 and graticle 3 are placed on image space side the entering along tested camera lens 4 of tested camera lens 4
Penetrate optical axis direction and draw near and lay successively, described graticle 3 is carved with multigroup meridian from not collinear pair to and the sagitta of arc to row
The detectability unit pattern of the black and white fine rule composition of row；
2. the concave mirror 5 focal length being more than tested camera lens 4 focal length is placed on the object space side of tested camera lens 4,
Concave mirror 5 and tested camera lens 4 is made to cooperatively form amplification light path, the reflecting surface of described concave mirror 5 is towards measured lens
4 and the optical axis of concave mirror 5 is in the angle of inclination setting with the optical axis of tested camera lens 4；" the inclination of setting mentioned here
Angle " refers to that light can enter all angles that concave mirror 5 and reflection light will not be blocked by the structure of tested camera lens 4 again
Degree.
3. multiple images sensor 6 is distributed on the focal plane of concave mirror 5 according to the measurement requirement of tested camera lens 4,
Each imageing sensor 6 is connected one to one with each digital image processing unit 71 on mtf data analyzer 7 respectively；
4. adjustment graticle 3 and the relative position of tested camera lens 4, are located at the focal plane of tested camera lens 4 up to graticle 3,
The image of clearly detectability unit pattern is formed with the directional light ensureing to produce by tested camera lens 4 on imageing sensor 6；
5. each digital image processing unit 71 is chosen respectively and is located at center on coupled imageing sensor 6
The image of one detectability unit pattern, calculates not collinear mtf value corresponding to density according to this image；
6. mtf data analyzer 7 is according to each imageing sensor 6 place view position and each Digital Image Processing list
The mtf values that calculate of unit 71, generation meridian on different visual angles position for the tested camera lens 4 to the sagitta of arc to modulation transfer function (MTF)
Curve.
In order to reduce volume, the present invention has done and has improved further: between described concave mirror 5 and imageing sensor 6
Setting plane mirror 8 carries out bending to light path.
As a kind of preferred scheme, the optical axis of described concave mirror 5 after plane mirror 8 bending with tested camera lens
4 optical axis is parallel.Certainly the optical axis of concave mirror 5 and the optical axis of tested camera lens 4 can also be not parallel or other
Angle, simply the volume of whole device can ratio larger, do not interfere with measurement result.
The focal length of described concave mirror 5 must be more than several times of tested camera lens 4 focal length, to ensure the picture of concave mirror 5
Difference is on measurement impact less；The focal length of concave mirror 5 must be less than tens times of tested camera lens 4 focal length so that imageing sensor 6
The pattern enough mtf measurement obtaining is required.As a kind of preferred scheme, the focal length of described concave mirror 5 is tested camera lens 4
4～10 times of focal length.
In order to be able to the impact to measurement for the aberration such as effective curvature of field reducing concave mirror, each described image sensor 6
The position Independent adjustable of opposed concave reflecting mirror 5.When the focal plane of concave mirror 5 is curved surface, can adjust each image sensing
Device 6, makes imageing sensor 6 close to the focal plane of concave mirror 5.
(2) specific embodiment two:
As Figure 1-4, the one kind providing for the present invention is used for realizing the modulation transmission of concave mirror imaging measurement telephoto lens
The device of the method for function, this device includes tested camera lens 4 and is arranged at tested camera lens 4 image space side and along tested camera lens 4
Incident light axis direction draw near the light source 1 laid successively, even tabula rasa 2 and graticle 3, described graticle 3 is carved with multigroup
From the meridian of not collinear pair to and the detectability unit pattern that forms of black and white fine rule from the sagitta of arc to arrangement, this device also include for
Adjustment relatively tested camera lens 4 position of graticle 3 position regulator, be arranged at tested camera lens object space side for tested
Camera lens 4 cooperatively forms the concave mirror 5 of amplification light path, multiple measurement requirement according to tested camera lens 4 is distributed in concave reflection
Imageing sensor 6 on the focal plane of mirror 5 and the mtf data analyzer 7 being connected with each imageing sensor 6 respectively, described
The focal length of concave mirror 5 is more than the focal length of tested camera lens 4, and the reflecting surface of described concave mirror 5 is towards tested camera lens 4 and recessed
The optical axis of face reflecting mirror 5 is in the angle of inclination setting with the optical axis of tested camera lens 4, and described mtf data analyzer 7 is provided with quantity
The digital image processing unit 71 matching with imageing sensor 6, each imageing sensor 6 respectively with mtf data analyzer 7 on
Each digital image processing unit 71 connect one to one.Described position regulator can be manual or automatic, can
To be machinery or electronic etc.." angle of inclination of setting " mentioned here refer to light can enter concave mirror 5 and
The institute that reflection light will not be blocked by the structure of tested camera lens 4 again is angled.As shown in figure 3, being several points of imageing sensor 6
The schematic diagram of mode for cloth.As shown in figure 4, the schematic diagram for one of which detectability unit pattern of the present invention.
In order to reduce volume, the present invention has done and has improved further: this device also includes being arranged at concave mirror 5 and image
The plane mirror 8 for light path is carried out with bending between sensor 6.
As a kind of preferred scheme, the optical axis of described concave mirror 5 after plane mirror 8 bending with tested camera lens
4 optical axis is parallel.Certainly the optical axis of concave mirror 5 and the optical axis of tested camera lens 4 can also be not parallel or other
Angle, simply the volume of whole device can ratio larger, do not interfere with measurement result.
The focal length of described concave mirror 5 must be more than several times of tested camera lens 4 focal length, to ensure the picture of concave mirror 5
Difference is on measurement impact less；The focal length of concave mirror 5 must be less than tens times of tested camera lens 4 focal length so that imageing sensor 6
The pattern enough mtf measurement obtaining is required.As a kind of preferred scheme, the focal length of described concave mirror 5 is tested camera lens 4
4～10 times of focal length.
In order to be able to the impact to measurement for the aberration such as effective curvature of field reducing concave mirror, each described image sensor 6
The position Independent adjustable of opposed concave reflecting mirror 5.Concave reflection can be realized by the adjusting apparatus increasing manually or automatically
The Independent adjustable of mirror 5 position.When the focal plane of concave mirror 5 is curved surface, can adjust each imageing sensor 6, so that image is passed
Sensor 6 is close to the focal plane of concave mirror 5.
Above-mentioned specific embodiment is simply explained in detail to technical scheme, the present invention not only only office
It is limited to above-described embodiment, every any improvement according to the principle of the invention or replacement, all should be within protection scope of the present invention.
Claims (10)
1. a kind of method of concave mirror imaging measurement telephoto lens modulation transfer function (MTF) it is characterised in that: the method includes following
Step:
1. light source (1), even tabula rasa (2) and graticle (3) are placed on the image space side of tested camera lens (4) and along tested camera lens
(4) incident light axis direction draws near and lays successively, described graticle (3) is carved with multigroup meridian from not collinear pair to
The detectability unit pattern of the black and white fine rule composition to arrangement for the sagitta of arc；
2. the concave mirror (5) focal length being more than tested camera lens (4) focal length is placed on the object space one of tested camera lens (4)
Side is so that concave mirror (5) and tested camera lens (4) cooperatively form amplification light path, the reflecting surface court of described concave mirror (5)
To tested camera lens (4), and the optical axis of concave mirror (5) is in that the angle of inclination setting makes instead with the optical axis of tested camera lens (4)
Penetrate light to be blocked by the structure of tested camera lens (4)；
3. multiple images sensor (6) is distributed in the focal plane of concave mirror (5) according to the measurement requirement of tested camera lens (4)
On, by each imageing sensor (6) respectively with mtf data analyzer (7) on each digital image processing unit (71) one by one
Corresponding connection；
4. adjustment graticle (3) and the relative position of tested camera lens (4), put down up to graticle (3) positioned at Jiao of tested camera lens (4)
Face, to ensure the directional light producing by tested camera lens (4) in imageing sensor (6) upper formation clearly detectability unit pattern
Image；
5. each digital image processing unit (71) is chosen coupled imageing sensor (6) respectively and is above located at center
The image of one detectability unit pattern, calculates not collinear mtf value corresponding to density according to this image；
6. mtf data analyzer (7) is according to each imageing sensor (6) place view position and each Digital Image Processing list
The mtf value that first (71) calculate, generate meridian on different visual angles position for the tested camera lens (4) to the sagitta of arc to modulation transmit
Function curve.
2. concave mirror imaging measurement telephoto lens modulation transfer function (MTF) according to claim 1 method it is characterised in that:
Between described concave mirror (5) and imageing sensor (6), setting plane mirror (8) carries out bending to light path.
3. concave mirror imaging measurement telephoto lens modulation transfer function (MTF) according to claim 2 method it is characterised in that:
The optical axis of described concave mirror (5) is paralleled with the optical axis of tested camera lens (4) after plane mirror (8) bending.
4. concave mirror imaging measurement telephoto lens modulation transfer function (MTF) according to claim 1 method it is characterised in that:
The focal length of described concave mirror (5) is 4～10 times of tested camera lens (4) focal length.
5. concave mirror imaging measurement telephoto lens modulation transfer function (MTF) according to claim 1 method it is characterised in that:
The position Independent adjustable of each described image sensor (6) opposed concave reflecting mirror (5).
6. a kind of device for realizing method any one of claim 1-5 it is characterised in that: this device includes tested
Camera lens (4) and be arranged at tested camera lens (4) image space side and draw near successively along the incident light axis direction of tested camera lens (4)
The light source (1) laid, even tabula rasa (2) and graticle (3), described graticle (3) is carved with multigroup meridian from not collinear pair to
With the detectability unit pattern of the black and white fine rule composition to arrangement for the sagitta of arc, this device also includes relative for adjusting graticle (3)
The position regulator of tested camera lens (4) position, be arranged at tested camera lens object space side for tested camera lens (4) coordinate shape
Become to amplify the concave mirror (5) of light path, multiple measurement requirement according to tested camera lens (4) is distributed in concave mirror (5)
Imageing sensor (6) on focal plane and the mtf data analyzer (7) being connected with each imageing sensor (6) respectively, described
The focal length of concave mirror (5) is more than the focal length of tested camera lens (4), and the reflecting surface of described concave mirror (5) is towards measured lens
The optical axis of head (4) and the optical axis of concave mirror (5) and tested camera lens (4) is in the angle of inclination setting, described mtf data analysiss
Instrument (7) is provided with the digital image processing unit (71) that quantity is matched, each imageing sensor (6) with imageing sensor (6)
Connect one to one with each digital image processing unit (71) on mtf data analyzer (7) respectively.
7. device according to claim 6 it is characterised in that: this device also includes being arranged at concave mirror (5) and figure
As the plane mirror (8) for light path is carried out with bending between sensor (6).
8. device according to claim 7 it is characterised in that: the optical axis of described concave mirror (5) is through plane mirror
(8) parallel with the optical axis of tested camera lens (4) after bending.
9. device according to claim 6 it is characterised in that: the focal length of described concave mirror (5) be tested camera lens (4)
4～10 times of focal length.
10. device according to claim 6 it is characterised in that: each described image sensor (6) opposed concave reflecting mirror
(5) position Independent adjustable.
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| CN201610754385.XA CN106370397B (en) | 2016-08-29 | 2016-08-29 | The method and device of concave mirror imaging measurement telephoto lens modulation transfer function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617949A (en) * | 2019-10-25 | 2019-12-27 | 福州锐景达光电科技有限公司 | Object image unit device and object image adjusting method |
| CN111024373A (en) * | 2019-12-25 | 2020-04-17 | 福州锐景达光电科技有限公司 | Lens assembly focal plane measuring and correcting device and focal plane measuring and correcting method |
| CN111982472A (en) * | 2020-08-17 | 2020-11-24 | 福州锐景达光电科技有限公司 | Cross-hair pattern unit, reticle and method for measuring magnification of inverse projection light path |
| CN114235347A (en) * | 2021-11-23 | 2022-03-25 | 珠海市奥德维科技有限公司 | Lens quality evaluation method and device |
| CN114910254A (en) * | 2022-07-14 | 2022-08-16 | 歌尔光学科技有限公司 | Testing device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11183326A (en) * | 1997-12-25 | 1999-07-09 | Ricoh Co Ltd | Lens measuring device and method |
| US20040179191A1 (en) * | 2000-10-18 | 2004-09-16 | Seiko Epson Corporation | Lens evaluation method and lens-evaluating apparatus |
| JP2009150841A (en) * | 2007-12-21 | 2009-07-09 | Sumitomo Electric Ind Ltd | Lens abnormality self-diagnosis method, imaging device, lens abnormality self-diagnosis system, and vehicle |
| CN104122077A (en) * | 2014-07-31 | 2014-10-29 | 福州锐景达光电科技有限公司 | Method and device for measuring modulation transfer functions of optic lenses through infinite conjugated light paths |
| CN104360573A (en) * | 2014-10-31 | 2015-02-18 | 深圳雅图数字视频技术有限公司 | Projection zooming device and projection zooming system |
| CN105334607A (en) * | 2015-12-05 | 2016-02-17 | 中国航空工业集团公司洛阳电光设备研究所 | No-blocking pure reflection optical system |
| CN105486489A (en) * | 2015-12-04 | 2016-04-13 | 西安应用光学研究所 | Television imaging system modulation transfer function test device and method |
| CN206038278U (en) * | 2016-08-29 | 2017-03-22 | 福州锐景达光电科技有限公司 | Concave mirror imaging measurement telephoto lens modulation transfer function's device |
-
2016
- 2016-08-29 CN CN201610754385.XA patent/CN106370397B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11183326A (en) * | 1997-12-25 | 1999-07-09 | Ricoh Co Ltd | Lens measuring device and method |
| US20040179191A1 (en) * | 2000-10-18 | 2004-09-16 | Seiko Epson Corporation | Lens evaluation method and lens-evaluating apparatus |
| JP2009150841A (en) * | 2007-12-21 | 2009-07-09 | Sumitomo Electric Ind Ltd | Lens abnormality self-diagnosis method, imaging device, lens abnormality self-diagnosis system, and vehicle |
| CN104122077A (en) * | 2014-07-31 | 2014-10-29 | 福州锐景达光电科技有限公司 | Method and device for measuring modulation transfer functions of optic lenses through infinite conjugated light paths |
| CN104360573A (en) * | 2014-10-31 | 2015-02-18 | 深圳雅图数字视频技术有限公司 | Projection zooming device and projection zooming system |
| CN105486489A (en) * | 2015-12-04 | 2016-04-13 | 西安应用光学研究所 | Television imaging system modulation transfer function test device and method |
| CN105334607A (en) * | 2015-12-05 | 2016-02-17 | 中国航空工业集团公司洛阳电光设备研究所 | No-blocking pure reflection optical system |
| CN206038278U (en) * | 2016-08-29 | 2017-03-22 | 福州锐景达光电科技有限公司 | Concave mirror imaging measurement telephoto lens modulation transfer function's device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617949A (en) * | 2019-10-25 | 2019-12-27 | 福州锐景达光电科技有限公司 | Object image unit device and object image adjusting method |
| CN110617949B (en) * | 2019-10-25 | 2024-05-14 | 福州锐景达光电科技有限公司 | Object image unit device and object image adjusting method |
| CN111024373A (en) * | 2019-12-25 | 2020-04-17 | 福州锐景达光电科技有限公司 | Lens assembly focal plane measuring and correcting device and focal plane measuring and correcting method |
| CN111982472A (en) * | 2020-08-17 | 2020-11-24 | 福州锐景达光电科技有限公司 | Cross-hair pattern unit, reticle and method for measuring magnification of inverse projection light path |
| CN114235347A (en) * | 2021-11-23 | 2022-03-25 | 珠海市奥德维科技有限公司 | Lens quality evaluation method and device |
| CN114235347B (en) * | 2021-11-23 | 2023-05-16 | 珠海市奥德维科技有限公司 | Lens quality assessment method and device |
| CN114910254A (en) * | 2022-07-14 | 2022-08-16 | 歌尔光学科技有限公司 | Testing device |
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