CN106338814A - Large field of view long exit pupil distance and long working distance stellar simulator's optical system - Google Patents
Large field of view long exit pupil distance and long working distance stellar simulator's optical system Download PDFInfo
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- CN106338814A CN106338814A CN201610944082.4A CN201610944082A CN106338814A CN 106338814 A CN106338814 A CN 106338814A CN 201610944082 A CN201610944082 A CN 201610944082A CN 106338814 A CN106338814 A CN 106338814A
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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
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- 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
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- 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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Radar, Positioning & Navigation (AREA)
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Abstract
The invention discloses a large field of view long exit pupil distance and long working distance stellar simulator's optical system, which is a secondary imaging system comprising, in order from the exit pupil caliber to the starboard, a primary imaging group with positive optical power, a collimating optical group with positive optical power, and a secondary imaging group with positive optical power. The primary imaging group should meet the following conditions. When the general length of the optical system L is no more than 6f, f1/f should be above or equal to 0.6 but not beyond 1.5, and f23/f should be above or equal to 0.25 but not beyond one. The L represents the general length of the optical system; f represents 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. According to the invention, through proper focal length distribution and the adoption of a secondary imaging manner, large aberration optical groups are reasonably complicated for large field of vision imaging and long exit pupil distance and long working distance.
Description
Technical field
The present invention relates to the optical system of a kind of Projection Display or simulated target is and in particular to a kind of big visual field grows interpupillary distance
Long working distance fixed star simulator optical system.
Background technology
Fixed star simulator is the important component part of star sensor ground calibration device, mainly has 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 the star image simulation information outgoing in the form of directional light sending star chart display, realizes
Starlight simulation from " infinity " target.
Star sensor is a kind of high precision measuring instrument, and the fixed star simulator of the ground calibration instrument as star sensor
There is the simulation precision of corresponding even more high.Generally fixed star simulator optical system is designed using symmetrical expression and passes through to increase
Enter interpupillary distance to reduce aberration, improve star image simulation precision.But the visual field with star sensor demand increasing it is desirable to fixed star mould
The visual field intending device is also increasing.On the other hand, because the entrance pupil of optical system of star sensor is generally relatively deep, and the screening outside camera lens
Light shield limits the use space of matching fixed star simulator, and this requires that fixed star simulator must have larger emergent pupil
Away from.So, visual field increases to lead to have and grows the fixed star simulator optical system bore of interpupillary distance and become big, and aberration drastically becomes big.
In dynamic fixed star simulator, liquid crystal light valve is usually used and comes simulated target source, when single liquid crystal light valve cannot be expired
When sufficient visual field requires, need to increase visual field using two or more, a kind of feasible method is vertical using Amici prism
The other end one liquid crystal light valve of addition in direction carries out visual field and spreads.On the other hand, when the device needing orthodromic illumination using other
When part, such as DMD come simulated target source, need to add Amici prism between optical system and image planes another
Direction is illuminated.Because imaging beam bore is larger, the size of Amici prism is also larger, so optical system needs have relatively
Big working distance.
Chinese invention patent cn 105527721 a provides a kind of optical system of star simulator having and growing interpupillary distance, tool
There is longer emergent pupil away from but its visual field is not big, and working distance is shorter.
Content of the invention
It is an object of the invention to: cannot realize when increasing visual field growing for existing fixed star simulator optical system simultaneously
Emergent pupil, away from the shortcoming with long working distance, provides a kind of big visual field to grow interpupillary distance long working distance fixed star simulator optical system.
In order to achieve the above object, the present invention provides a kind of big visual field to grow interpupillary distance long working distance fixed star simulator optical system
System, this optical system from emergent pupil (aperture diaphragm) to image planes (star tester) include in order Polaroid group, collimating optics group and
Secondary imaging group, their focal length and system focal meet relationship below:
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, and f23 is collimating optics group and the combination of secondary imaging group
Focal length.
Further, described optical system is secondary imaging system, and all lens are standard sphere.
Further, Polaroid group of described optical system be positive light coke,；Collimating optics group be positive light coke,；
Secondary imaging group is positive light coke.
Further, circular full filed fov >=25 ° of described optical system.
Further, the operating distance of described optical system meets: f≤lb≤2.75f.
Further, overall length from pupil to image planes for the described optical system meets: l≤6f.
Further, the emergent pupil of described optical system is away from satisfaction: 1≤lp/f≤2.
Present invention advantage compared with prior art is:
(1) pass through Polaroid group of focal power of reasonable distribution, in the case that optical system focal length is less visual field is larger
Remain to increase emergent pupil away from and Polaroid group being carried out with complication aberration can be obviously reduced, maximum emergent pupil is away from up to focal length
Twice.
(2) pass through the focal power of reasonable distribution collimating optics group and secondary imaging group, less and regard in optical system focal length
Remain in the case of larger increase operating distance, maximum functional is away from up to 2.75 times of focal length.
(3) present invention can be used in dynamic or static fixed star simulator it can also be used to the helmet shows or nearly eye display optics
In instrument, particularly require to grow in interpupillary distance or the optical system of long reach.
Brief description
Fig. 1 is each optics group focal power distribution diagram under near-axial condition for the present invention.
Fig. 2 is the optical system lens topology view of preferred embodiments of the present invention.
Fig. 3 is the mtf curve chart of the optical system shown in Fig. 2.
Fig. 4 is the point disc of confusion scattergram of the optical system shown in Fig. 2.
Fig. 5 is the distortion curve figure of the optical system shown in Fig. 2.
Specific embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear,
Complete description, described embodiment is only an example of the present invention, rather than whole embodiments.
With reference to Fig. 1, it is each optics group focal power distribution diagram under near-axial condition for the present invention.The described long emergent pupil in big visual field
Distance working distance fixed star simulator optical system is secondary imaging system, is made up of three lens group of arranged in co-axial alignment, from emergent pupil 1
Include Polaroid group 2, collimating optics group 3 and secondary imaging group 4 to image planes 5 successively, three optics groups are positive light coke.
The circular full filed fov of described optical system meets:
fov≥25°.(condition 1)
Meet with the distance between entrance pupil 1 (aperture diaphragm) lp for Polaroid group 2:
1≤lp/f≤2.(condition 2)
Polaroid group 2 image planes 20 are imaged at a certain distance from below, Polaroid group 2 that meets condition 2 makes refraction
Angle between the rear chief ray of each visual field and optical axis is less than or equal to 0 degree, i.e. negative value (set counter clockwise direction as on the occasion of), so
On the one hand increase emergent pupil 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
Zoom in or out to the system focal of demand, combined focal length f23 meets:
0.25≤f23/f≤1 (condition 3)
Reasonable distribution collimating optics group 3 and the focal length of secondary imaging group 4, make collimating optics group 3 have less focal power
Keep less optics overall length simultaneously.System optics overall length l meets:
L≤6f (condition 4)
By the location positioning of secondary imaging group 4 at virtual aperture diaphragm, longer working distance can be obtained, meet condition
(2), in the case of (3) and (4), working distance lb up to:
f≤lb≤2.75f.
With reference to Fig. 2, it is the optical system lens topology view of preferred embodiments of the present invention.In the present embodiment, system
Focal length is 45.66mm, is 300mm from the optics overall length of entrance pupil 1 to image planes 5, and full filed is circular 28.28 °, and emergent pupil is a length of
60mm, working distance is 49.09mm.
In the present embodiment, Polaroid group of 2 focal length are 63.323mm, comprise 4 lens, focal power respectively just, just,
Negative, positive.First lens 21 and the second lens 22 are biconvex lens, collectively constitute larger focal power, reduce and increased due to visual field
The senior aberration causing.3rd lens 23 and the 4th lens 24 are a pair of achromat, and glue-bondable if necessary, 4 lens are equal
For standard sphere, the astigmatism of the Polaroid group of certain surplus of generation and the curvature of field, in order to offset collimating optics group and secondary imaging group
Contrary astigmatism and the curvature of field.
Collimating optics group 3 has less focal power, and focal length is 82.783mm, comprises 3 lens, focal power is respectively
Just, positive and negative.Each visual field chief ray wide-angle is reflected and introduces minus lenses 33 by two plus lens 31 and 32, and minus lenses 33 will regard greatly
Field chief ray convergence introduces secondary imaging group 4.
Secondary imaging group 4 has larger focal power, and focal length is 36.566mm, comprises 4 lens, 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
In table 1, all lens face types are standard sphere.
Referring concurrently to Fig. 3, Fig. 4 and Fig. 5, they are the mtf curve chart of embodiment illustrated in fig. 2, point disc of confusion distribution respectively
Figure and distortion curve figure, show the big visual field being provided grow interpupillary distance long working distance fixed star simulator optical system have higher
Optical property.
The announcement of book and teaching according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is entered to exercise the change worked as and modification.Therefore, the present invention is not limited to specific embodiment disclosed and described above, to this
Some bright modifications and changes also should fall in the scope of the claims of the present invention.
Claims (7)
1. a kind of big visual field grow interpupillary distance long working distance fixed star simulator optical system it is characterised in that: this optical system is from entering
Pupil includes Polaroid group, collimating optics group and secondary imaging group in order to image planes, and entrance pupil is at aperture diaphragm, and image planes are star
At point plate, wherein Polaroid group includes 4 lens；Collimating optics group includes 3 lens；Secondary imaging group includes 4 lens,
And meet relationship below:
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, and f23 is the group focus of collimating optics group and secondary imaging group
Away from.
2. a kind of big visual field according to claim 1 grows interpupillary distance long working distance fixed star simulator optical system, its feature
It is: this optical system is secondary imaging system, and all lens are standard sphere.
3. a kind of big visual field according to claim 1 grows interpupillary distance long working distance fixed star simulator optical system, its feature
It is: Polaroid group is positive light coke；Collimating optics group is positive light coke；Secondary imaging group is positive light coke.
4. a kind of big visual field according to claim 1 grows interpupillary distance long working distance fixed star simulator optical system, its feature
It is: the circular full filed fov of optical system meets: fov >=25 °.
5. a kind of big visual field according to claim 1 grows interpupillary distance long working distance fixed star simulator optical system, its feature
It is: operating distance lb of optical system meets: f≤lb≤2.75f.
6. a kind of big visual field according to claim 1 grows interpupillary distance long working distance fixed star simulator optical system, its feature
It is: overall length l from pupil to image planes for the optical system meets: l≤6f.
7. a kind of big visual field according to claim 1 grows interpupillary distance long working distance fixed star simulator optical system, its feature
It is: the emergent pupil of optical system meets away from lp: 1≤lp/f≤2.
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| CN201610944082.4A CN106338814B (en) | 2016-10-26 | 2016-10-26 | Big visual field grows interpupillary distance long working distance stellar simulator optical system |
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Cited By (4)
| 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 | A kind of athermal Dynamic Star simulator optical system |
| CN111412914A (en) * | 2020-04-21 | 2020-07-14 | 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 |
| CN113029195A (en) * | 2021-03-01 | 2021-06-25 | 中国科学院光电技术研究所 | Static star simulator based on LED three-sky-region switching and manufacturing method thereof |
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Cited By (6)
| 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 | A kind of athermal Dynamic Star simulator optical system |
| CN111412914A (en) * | 2020-04-21 | 2020-07-14 | 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 |
| 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 |
| CN113029195A (en) * | 2021-03-01 | 2021-06-25 | 中国科学院光电技术研究所 | Static star simulator based on LED three-sky-region switching and manufacturing method thereof |
| CN113029195B (en) * | 2021-03-01 | 2022-10-21 | 中国科学院光电技术研究所 | Static star simulator based on LED three-sky-region switching and manufacturing method thereof |
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