CN205720914U - A kind of pass the light path regulating device of tested camera lens in letter test - Google Patents
A kind of pass the light path regulating device of tested camera lens in letter test Download PDFInfo
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- CN205720914U CN205720914U CN201620296446.8U CN201620296446U CN205720914U CN 205720914 U CN205720914 U CN 205720914U CN 201620296446 U CN201620296446 U CN 201620296446U CN 205720914 U CN205720914 U CN 205720914U
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- camera lens
- tested camera
- light path
- letter
- internal focusing
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Abstract
This utility model provides a kind of and passes the light path regulating device of tested camera lens in letter test, and device includes plane mirror and internal focusing telescope；Plane mirror is positioned between tested camera lens and the off axis paraboloidal mirror passing letter system, the punctate opacity of the cornea picture or the reflection image of tested camera lens passing letter system for turning back；Internal focusing telescope is used for punctate opacity of the cornea picture or the reflection image of tested camera lens that receiving plane reflecting mirror is turned back, and makes the optical axis of tested camera lens parallel with the optical axis passing letter test system.This utility model carries out autocollimatic first with internal focusing telescope to whole biography letter test system light path, optical axis is directly delivered on internal focusing telescope, the autocollimatic of tested camera lens only need to wear axle with the optical axis of internal focusing telescope, and internal focusing telescope only need to adjust a light path and can be fixed on that position and carry out transmitting.
Description
Technical field
This utility model belongs to field of optical detection, relates to pass the light path regulating device of letter test, especially
Relate to MTF test device and the regulation side thereof of a kind of camera lens that can not directly use reflecting mirror autocollimatic regulation light path
Method.
Background technology
Many problems attracted attention in the evaluation of optical system imaging quality, always Application Optics field.So-called one-tenth
Picture element amount, mainly as and thing between the spatial distribution of intensity in the case of not considering amplification and colourity
Concordance.In order to enable the image quality of accurate evaluation optical system, people have studied many methods of inspection of planting, such as:
Geometrical aberration inspection, detectability inspection, star test.But these methods of inspection are all respectively arranged with the applicable model of oneself
Enclose and limitation.Modern age optical theory development, demonstrate optical system and can effectively regard space frequency as
The wave filter of rate, its imaging characteristic and image quality evaluation then can represent with the ratio of the frequency spectrum between image,
This contrastive feature is exactly so-called optical transfer function.Transfer function to evaluate the one-tenth of optical system with optics
Picture element amount is the development of previous methods.It is to be made up of the spectrum of various frequencies, the most just based on object is regarded as
It is that the optical field distribution functional expansion of object is become Fourier space (thing function is periodic function) or Fourier integration
The form of (thing function is aperiodic function).Therefore optical transfer function reflects the frequency characteristic of optical system,
It is both relevant with the aberration of optical system, relevant with the diffracting effect of system again, and with the form of a function
Represent a large amount of picture element information that punctate opacity of the cornea is provided quantitatively, also include the picture element letter represented by detectability simultaneously
Breath.Therefore to be acknowledged as evaluating optical system imaging quality at present more objective, effective for optical transfer function
Method.The measurement of optical transfer function also has certain required precision in method.
In general test process, need light path is carried out autocollimatic, in order in test process, determine that center regards
The biography letter accuracy of field.Optical path adjusting is broadly divided into two parts, a part be whole test device light path from
Standard, i.e. by adjusting azimuth pitch so that the reflected light path of detector is parallel with optical axis.Another part is right
The light path of tested camera lens adjusts, i.e. by adjusting azimuth pitch so that the reflected light path of tested camera lens and optical axis
Parallel.Reflecting mirror only need to be leaned against before detector by the adjustment of Part I, the azimuth pitch of fine setting detector,
Punctate opacity of the cornea picture is adjusted in CCD target surface.But the camera lens that datum level is exposed is come by the light path autocollimatic of another part
Say, adjust identical with Part I step, but can not extract for datum level, or surface is without base
For the camera lens in quasi-face, there is certain difficulty in the autocollimatic of light path, and one substantially can only be looked at random to lean on face,
Substantially regulate the azimuth pitch of camera lens, in test process, look for optical axis with left and right fields of vision symmetry, determine on axle
The accuracy of test.
Summary of the invention
In order to solve above-mentioned technical problem present in background technology, this utility model provides one can be accurate
Really, light path regulating device and control method thereof for passing letter test reliable, convenient to operate.
Technical solution of the present utility model is:
The light path regulating device of tested camera lens in biography letter provided by the utility model test, its special character exists
In:
Including plane mirror and internal focusing telescope；
Described plane mirror is positioned between tested camera lens and the off axis paraboloidal mirror passing letter system, is used for rolling over
Turn punctate opacity of the cornea picture or the reflection image of tested camera lens passing letter system；
Described internal focusing telescope is used for punctate opacity of the cornea picture or the reflection of tested camera lens that receiving plane reflecting mirror is turned back
Picture, makes the optical axis of tested camera lens parallel with the optical axis passing letter test system.
Above-mentioned light path regulating device also includes one-dimensional turntable, and described one-dimensional turntable is for regulating plane mirror
Pitching and orientation.
Above-mentioned light path regulating device also includes lifting platform, and described lifting platform is for regulating the height of plane mirror.
Utilizing the method that above-mentioned light path regulating device carries out tested camera lens optical path adjusting, it is characterized in that
Comprise the following steps:
1) optical axis making plane mirror and pass letter test system becomes 45, by plane mirror, will pass letter and survey
The punctate opacity of the cornea picture of test system falls on the target surface of internal focusing telescope；
2) regulation internal focusing telescope, make punctate opacity of the cornea picture fall at the target surface center of internal focusing telescope, as under
The benchmark of one step optical path adjusting；
3) by half-twist counterclockwise for plane mirror, make plane mirror reflecting surface just to tested camera lens,
The reflection image of tested camera lens falls in the target surface of internal focusing telescope；
4) regulate the azimuth pitch of tested camera lens, make tested camera lens make the reflection image of the sheet glass in tested camera lens
Substantially fall at the target surface center of internal focusing telescope, complete the regulation of tested camera lens.
The method of above-mentioned tested camera lens optical path adjusting also includes step 5) by the tune to internal focusing telescope focal length
Whole, the glass in tested camera lens is finely adjusted successively, verifies the alignment of each glass.
Compared with prior art, advantage is this utility model:
1, this utility model carries out autocollimatic first with internal focusing telescope to whole biography letter test system light path, will
Optical axis is directly delivered on internal focusing telescope, and the autocollimatic of tested camera lens only need to be with the optical axis of internal focusing telescope
Wearing axle, internal focusing telescope only need to adjust a light path and can be fixed on that position to carry out transmitting and be
Can.
2, this utility model is applicable to the biography letter test of various types of optical lens.
3, the internal focusing telescope in this utility model is it can be seen that in tested camera lens in the curvature of each sheet glass
The heart, can verify whether tested camera lens has problems in processing the heart further.
4, this utility model eliminate pass letter test process regulates left and right fields of vision symmetry look for optical axis lengthy and tedious time
Between and step.
Accompanying drawing explanation
Fig. 1 is the structural representation of light path regulating device detecting system provided by the utility model；
Wherein: 1-microscope；The tested camera lens of 2-；3-plane mirror；The one-dimensional turntable of 4-；5-lifting platform；6-
Internal focusing telescope；7-support；8-punctate opacity of the cornea (Target Board)；9-light source (halogen tungsten lamp)；10-off axis paraboloidal mirror.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in detail.
As it is shown in figure 1, microscope 1, punctate opacity of the cornea 8, light source 9 and off axis paraboloidal mirror 10 in Fig. 1 are all
Belong to biography letter test system components.Plane mirror in Fig. 1, one-dimensional turntable, lifting platform and interior focusing are hoped
Remote mirror is the assembly of adjusting means；Plane mirror is positioned over tested camera lens and the off axis paraboloid mirror passing letter system
Between mirror, the punctate opacity of the cornea picture or the reflection image of tested camera lens passing letter system for turning back；Internal focusing telescope is used for
Punctate opacity of the cornea picture that receiving plane reflecting mirror is turned back or the reflection image of tested camera lens.
Plane mirror 3 of the present utility model is placed on 4 one-dimensional turntables, and by turning table control, it has rotated
Light path is turned back, reduces and be artificially rotated in actual test process the error produced.
Plane mirror 3 of the present utility model is placed on 5 lifting platforms, and lifting platform can be to plane mirror
Height be adjusted, after optical path adjusting terminates, can be declined, do not affect reality biography letter test.
Internal focusing telescope 6 of the present utility model can also detect between the different-diameter aperture in tested camera lens
Alignment.
The method utilizing light path regulating device of the present utility model to carry out optical path adjusting, comprises the following steps:
1, open biography letter testing system software, install punctate opacity of the cornea target, light the light source passing letter test system,
Adjust one-dimensional turntable, make plane mirror become 45 degree with optical axis, after light stability, enter next step；
2, regulate the focal length of internal focusing telescope, make punctate opacity of the cornea image position in the center of cross groove；Light path now
It is that punctate opacity of the cornea picture is imaged on internal focusing telescope by after plane mirror.
3, one-dimensional turntable dextrorotation is turn 90 degrees, aim at the first of tested camera lens with internal focusing telescope
Glass；Finely tune orientation and the pitching of tested camera lens, make hoping in interior focusing as falling of tested camera lens first piece
Remote mirror cross groove center；Light path now is that the plane mirror on turntable of the glass in tested camera lens becomes
As on internal focusing telescope.
4, regulate the focal length of internal focusing telescope, it is seen that the second sheet glass of tested camera lens, finely tune tested camera lens
Orientation and pitching, make tested camera lens the second sheet glass want to fall at internal focusing telescope cross groove center；
5, use internal focusing telescope again to aim at the first piece of tested camera lens, see whether his position has
Change, repeat step 4,5 so that first and second sheet glass as generally within internal focusing telescope cross carve
Line immediate vicinity.
Internal focusing telescope of the present utility model is after in first time, optical path adjusting completes, and is fixed on biography letter test system
On system platform, as the benchmark of optical axis, without re-adjustments autocollimatic in later test, easily realize optical axis
Transmission.
This utility model is highly suitable for passing in letter test process and applies, while completing optical path adjusting
Tested camera lens coaxial error during debuging can be verified, have wide range of applications, be worth being widelyd popularize.
Claims (3)
1. one kind passes the light path regulating device of tested camera lens in letter test, it is characterised in that:
Including plane mirror and internal focusing telescope；
Described plane mirror is positioned between tested camera lens and the off axis paraboloidal mirror passing letter system, is used for rolling over
Turn punctate opacity of the cornea picture or the reflection image of tested camera lens passing letter system；
Described internal focusing telescope is used for punctate opacity of the cornea picture or the reflection of tested camera lens that receiving plane reflecting mirror is turned back
Picture, makes the optical axis of tested camera lens parallel with the optical axis passing letter test system.
The light path regulating device of tested camera lens in biography letter the most according to claim 1 test, its feature exists
In:
Described light path regulating device also includes one-dimensional turntable, and described one-dimensional turntable is for regulating plane mirror
Pitching and orientation.
The light path regulating device of tested camera lens in biography letter the most according to claim 1 and 2 test, it is special
Levy and be:
Described light path regulating device also includes lifting platform, and described lifting platform is for regulating the height of plane mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620296446.8U CN205720914U (en) | 2016-04-11 | 2016-04-11 | A kind of pass the light path regulating device of tested camera lens in letter test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620296446.8U CN205720914U (en) | 2016-04-11 | 2016-04-11 | A kind of pass the light path regulating device of tested camera lens in letter test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205720914U true CN205720914U (en) | 2016-11-23 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620296446.8U Expired - Fee Related CN205720914U (en) | 2016-04-11 | 2016-04-11 | A kind of pass the light path regulating device of tested camera lens in letter test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205720914U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911716A (en) * | 2016-04-11 | 2016-08-31 | 中国科学院西安光学精密机械研究所 | Device and method for adjusting optical path of tested lens in transfer function test |
-
2016
- 2016-04-11 CN CN201620296446.8U patent/CN205720914U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911716A (en) * | 2016-04-11 | 2016-08-31 | 中国科学院西安光学精密机械研究所 | Device and method for adjusting optical path of tested lens in transfer function test |
| CN105911716B (en) * | 2016-04-11 | 2018-05-29 | 中国科学院西安光学精密机械研究所 | It is a kind of to pass the light path regulating device and its adjusting method that camera lens is tested in letter test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20190411 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |