CN106338814B - Optical system of large-field long-exit-pupil-distance long-working-distance constant-star simulator - Google Patents
Optical system of large-field long-exit-pupil-distance long-working-distance constant-star simulator Download PDFInfo
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- CN106338814B CN106338814B CN201610944082.4A CN201610944082A CN106338814B CN 106338814 B CN106338814 B CN 106338814B CN 201610944082 A CN201610944082 A CN 201610944082A CN 106338814 B CN106338814 B CN 106338814B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 55
- 238000003384 imaging method Methods 0.000 claims abstract description 32
- 210000001747 pupil Anatomy 0.000 claims abstract description 23
- 235000019892 Stellar Nutrition 0.000 claims abstract description 19
- 230000004075 alteration Effects 0.000 abstract description 6
- 230000000007 visual effect Effects 0.000 description 18
- 239000000571 coke Substances 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 201000009310 astigmatism Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001191 orthodromic effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Lenses (AREA)
Abstract
本发明公开了一种大视场长出瞳距长工作距恒星模拟器光学系统，该光学系统是一个二次成像系统，从出瞳口径到星点板按顺序包括：具有正光焦度的一次成像组；具有正光焦度的准直光学组；具有正光焦度的二次成像组。一次成像组需满足下述条件：在光学系统总长度L≤6f时，0.6≤f1/f≤1.5，0.25≤f23/f≤1，其中L是光学系统总长度，f是光学系统焦距，f1是一次成像组的焦距，f23是准直光学组和二次成像组的组合焦距。本发明提供的恒星模拟器光学系统通过合理分配光焦度，采用二次成像方式，对大像差光学组进行合理复杂化实现大视场成像，实现长出瞳距和长后工作距离。
The invention discloses an optical system for a star simulator with a large field of view, a long exit pupil distance and a long working distance. The optical system is a secondary imaging system. Imaging group; collimating optics group with positive refractive power; secondary imaging group with positive refractive power. The primary imaging group must meet the following conditions: when the total length of the optical system L≤6f, 0.6≤f1/f≤1.5, 0.25≤f23/f≤1, where L is the total length of the optical system, f is the focal length of the optical system, f1 is the focal length of the primary imaging group, and f23 is the combined focal length of the collimating optical group and the secondary imaging group. The optical system of the stellar simulator provided by the present invention reasonably complicates the large aberration optical group by reasonably distributing the optical power and adopts the secondary imaging method to realize the imaging of a large field of view, and realizes a long exit pupil distance and a long rear working distance.
Description
Technical field
The present invention relates to a kind of Projection Display or the optical systems of simulated target, and in particular to a kind of big visual field grows interpupillary distance
Long working distance stellar simulator optical system.
Background technique
Stellar simulator is the important component of star sensor ground calibration device, mainly there is star chart display device (star
Point graticle or spatial light modulator), simulator optical system, filtering assembly, light source, power supply and installing mechanism composition.Wherein,
The effect of simulator optical system is that the star image simulation information for issuing star chart display is emitted in the form of directional light, realizes and
It is simulated from the starlight of " infinity " target.
Star sensor is a kind of high precision measuring instrument, and the stellar simulator of the ground calibration instrument as star sensor
There is corresponding even higher simulation precision.Usual stellar simulator optical system is using symmetrical design and passes through increase
Enter interpupillary distance to reduce aberration, improves star image simulation precision.But as the visual field of star sensor demand is increasing, it is desirable that fixed star mould
The visual field of quasi- device is also increasing.On the other hand, since the entrance pupil of optical system of star sensor is usually relatively deep, and the screening outside camera lens
Light shield limits the use space of matching stellar simulator, and this requires stellar simulators must have biggish emergent pupil
Away from.In this way, visual field increase causes to become larger with the stellar simulator optical system bore for growing interpupillary distance, aberration sharply becomes larger.
In dynamic stellar simulator, come simulated target source usually using liquid crystal light valve, when single liquid crystal light valve can not expire
When sufficient visual field requires, need to increase using two or more visual field, a kind of feasible method is using Amici prism vertical
The other end in direction is added a liquid crystal light valve progress visual field and spreads.On the other hand, when using other devices for needing orthodromic illumination
Part, such as when Digital Micromirror Device comes simulated target source, need to be added Amici prism between optical system and image planes another
Direction is illuminated.Since imaging beam bore is larger, the size of Amici prism is also larger, thus optical system need have compared with
Big working distance.
105527721 A of Chinese invention patent CN provides a kind of with the optical system of star simulator for growing interpupillary distance, tool
There is longer emergent pupil away from but its visual field is not big enough, and working distance is shorter.
Summary of the invention
It is an object of the invention to: it not can be implemented simultaneously length when increasing visual field for existing stellar simulator optical system
Emergent pupil away from and the shortcomings that long working distance, a kind of big visual field is provided and grows interpupillary distance long working distance stellar simulator optical system.
In order to achieve the above object, the present invention provides a kind of big visual field and grows interpupillary distance long working distance stellar simulator optical system
System, the optical system from emergent pupil (aperture diaphragm) to image planes (star tester) in order including Polaroid group, collimating optics group and
Secondary imaging group, their focal length and system focal length meet following relationship:
0.6≤f1/f≤1.5 (1)；
0.25≤f23/f≤1 (2)；
Wherein, f1 is Polaroid group of focal length, and f is system focal length, and f23 is the combination of collimating optics group and secondary imaging group
Focal length.
Further, the optical system is secondary imaging system, and all lens are standard spherical surface.
Further, Polaroid group of the optical system be positive light coke,；Collimating optics group be positive light coke,；
Secondary imaging group is positive light coke.
Further, round full filed FOV >=25 ° of the optical system.
Further, the operating distance of the optical system meets: f≤Lb≤2.75f.
Further, overall length of the optical system from pupil to image planes meets: L≤6f.
Further, the emergent pupil of the optical system is away from satisfaction: 1≤Lp/f≤2.
The advantages of the present invention over the prior art are that:
(1) by Polaroid group of focal power of reasonable distribution, it is smaller in optical system focal length and in the biggish situation of visual field
Remain to increase emergent pupil away from and complicating to Polaroid group aberration can be obviously reduced, maximum emergent pupil is away from reachable focal length
Twice.
(2) smaller in optical system focal length and regard by the focal power of reasonable distribution collimating optics group and secondary imaging group
It remains to increase operating distance in the biggish situation in field, maximum functional is away from 2.75 times up to focal length.
(3) present invention can be used in dynamic or static stellar simulator, it can also be used to which the helmet is shown or nearly eye shows optics
In instrument, especially require to grow in interpupillary distance or the optical system of long reach.
Detailed description of the invention
Fig. 1 is each optics group focal power distribution diagram of the present invention under near-axial condition.
Fig. 2 is the optical system lens topology view of a preferred embodiments of the invention.
Fig. 3 is the MTF curve figure of optical system shown in Fig. 2.
Fig. 4 is the point disc of confusion distribution map of optical system shown in Fig. 2.
Fig. 5 is the distortion curve of optical system shown in Fig. 2.
Specific embodiment
Below in conjunction with the attached drawing in embodiment of the present invention, technical solution in the embodiment of the present invention carry out it is clear,
Complete description, described embodiment is only an example of the present invention, rather than whole embodiments.
It referring to Fig.1, is each optics group focal power distribution diagram of the present invention under near-axial condition.The long emergent pupil of big visual field
Distance working distance stellar simulator optical system is secondary imaging system, is made of three lens groups of arranged in co-axial alignment, from emergent pupil 1
To image planes 5 successively including Polaroid group 2, collimating optics group 3 and secondary imaging group 4, three optics groups are positive light coke.
The round full filed FOV of the optical system meets:
FOV≥25°.(condition 1)
The distance between Polaroid group 2 and entrance pupil 1 (aperture diaphragm) Lp meet:
1≤Lp/f≤2.(condition 2)
Polaroid group 2 image planes 20 are imaged at a certain distance from below, meeting Polaroid group 2 of condition 2 makes to reflect
Angle between the chief ray and optical axis of each visual field afterwards is less than or equal to 0 degree, i.e. negative value (setting counterclockwise as positive value), in this way
On the one hand emergent pupil is increased away from being on the other hand effectively compressed the clear aperature of subsequent optical system, reduce senior aberration.
The combination of collimating optics group 3 and secondary imaging group 4 is substantially a panntographic system, by Polaroid group of focal length
It zooms in or out to the system focal length of demand, combined focal length f23 meets:
0.25≤f23/f≤1 (condition 3)
The focal length of reasonable distribution collimating optics group 3 and secondary imaging group 4, makes collimating optics group 3 have lesser focal power
Lesser optics overall length is kept simultaneously.System optics overall length L meets:
L≤6f (condition 4)
The position of secondary imaging group 4 is positioned at virtual aperture diaphragm, longer working distance is can get, meets condition
(2), in the case where (3) and (4), working distance Lb is reachable:
f≤Lb≤2.75f。
It is the optical system lens topology view of a preferred embodiments of the invention referring to Fig. 2.In the present embodiment, system
Focal length is 45.66mm, is 300mm from entrance pupil 1 to the optics overall length of image planes 5, full filed is 28.28 ° of circle, and emergent pupil is a length of
60mm, working distance 49.09mm.
In the present embodiment, Polaroid group of 2 focal length are 63.323mm, include 4 lens, focal power is positive respectively, just,
Negative, positive.First lens 21 and the second lens 22 are biconvex lens, collectively constitute biggish focal power, are reduced since visual field increases
Caused senior aberration.The third lens 23 and the 4th lens 24 are a pair of of achromatic lens, and glue-bondable when necessary, 4 lens are equal
For standard spherical surface, the astigmatism and the curvature of field of the Polaroid group of certain surplus of generation, to offset collimating optics group and secondary imaging group
Opposite astigmatism and the curvature of field.
Collimating optics group 3 has lesser focal power, and focal length 82.783mm includes 3 lens, and focal power is respectively
Just, positive and negative.Each visual field chief ray wide-angle is reflected and introduces negative lens 33 by two positive lens 31 and 32, and negative lens 33 will regard greatly
Field chief ray convergence introduces secondary imaging group 4.
Secondary imaging group 4 has biggish focal power, and focal length 36.566mm includes 4 lens, and focal power is respectively
Just, positive and negative and just.Secondary imaging group 4 is located at virtual aperture diaphragm.
Each lens element of the present embodiment is as shown in table 1.
Table 1
All lens face types are standard spherical surface in table 1.
Referring concurrently to Fig. 3, Fig. 4 and Fig. 5, they are the MTF curve figure of embodiment illustrated in fig. 2, point disc of confusion distribution respectively
It is with higher to show that provided big visual field grows interpupillary distance long working distance stellar simulator optical system for figure and distortion curve
Optical property.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula carries out the change and modification for making to work as.Therefore, the present invention is not limited to specific embodiment disclosed and described above, to this hair
Bright some modifications and changes should also be fallen into the scope of the claims of the present invention.
Claims (4)
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| CN201610944082.4A CN106338814B (en) | 2016-10-26 | 2016-10-26 | Optical system of large-field long-exit-pupil-distance long-working-distance constant-star simulator |
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| CN201610944082.4A CN106338814B (en) | 2016-10-26 | 2016-10-26 | Optical system of large-field long-exit-pupil-distance long-working-distance constant-star simulator |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656007A (en) * | 2018-12-29 | 2019-04-19 | 中国科学院长春光学精密机械与物理研究所 | Varifocal optical system and imaging device |
| CN109781143A (en) * | 2019-01-25 | 2019-05-21 | 苏州大学 | An optical system of athermalized dynamic star simulator |
| CN111412914B (en) * | 2020-04-21 | 2022-08-23 | 中国科学院光电技术研究所 | Method for improving attitude update rate of star sensor based on rolling shutter exposure frame correlation |
| CN111722347A (en) * | 2020-07-31 | 2020-09-29 | 华北水利水电大学 | An optical system for simulating starry sky background |
| CN113029195B (en) * | 2021-03-01 | 2022-10-21 | 中国科学院光电技术研究所 | A static star simulator based on LED switching of three sky areas and its production method |
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