CN104360492A - Adjusting method of off-axis four-reflector optical system - Google Patents
Adjusting method of off-axis four-reflector optical system Download PDFInfo
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- CN104360492A CN104360492A CN201410682968.7A CN201410682968A CN104360492A CN 104360492 A CN104360492 A CN 104360492A CN 201410682968 A CN201410682968 A CN 201410682968A CN 104360492 A CN104360492 A CN 104360492A
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- mirrors
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- reflector
- adjustment
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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
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
- G02B17/0605—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using two curved mirrors
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eye Examination Apparatus (AREA)
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Abstract
The invention relates to an adjusting method of an off-axis four-reflector optical system. The off-axis four-reflector optical system comprises a primary reflector, a secondary reflector, a tertiary reflector and a quaternary reflector which are arranged in sequence. The adjusting method comprises the following steps that (1) the primary reflector is adjusted to enable the optical axis of the primary reflector to be parallel to the optical axis of an incident beam; (2) a microscope receives a reflected beam obtained after the incident beam passes through the primary reflector and the secondary reflector sequentially, and the position of the secondary reflector is adjusted to enable imaging of star point images in the microscope to meet a second set condition; (3) the front-and-back position of the tertiary reflector and the position of the quaternary reflector are adjusted to enable the reflected beam reflected by the quaternary reflector to met a third set condition and a fourth set condition. Through the adjusting method, the coaxial precision and the optimal image quality of the four off-axis reflectors can be guaranteed.
Description
Technical field
The present invention relates to a kind of Method of Adjustment from axle four-reflecting optical system, belong to ray machine integration techno logy field.
Background technology
Cassegrain's (being called for short Ka Shi) system is a kind of common bireflection optical system, principal reflection mirror is parabola normally, secondary mirror is hyperboloid normally, because Ka Shi system does not have aberration, bore can be accomplished very large, can detection range be significantly improved, therefore be used widely in astronomical sight and long-range detection.
Some Ka Shi system is not separate payment, form holonomic system with subsequent lens group, in order to compensate the spherical aberration of subsequent lens group, Ka Shi system must retain residual spherical aberration sometimes, therefore can not improve imaging, these Ka Shi systems can not be debug with the instrument such as knife, interferometer.
At present, in prior art, only have the Method of Adjustment of Ka Shi system, and the existing Method of Adjustment from axle four-reflecting optical system is loaded down with trivial details and resetting difficulty is larger, and also has following defect: need experienced especially debugging person; Repeatedly repeat debugging, efficiency is low.
Summary of the invention
The object of this invention is to provide a kind of Method of Adjustment from axle four-reflecting optical system, in order to solve the problem that the existing Method of Adjustment from axle four-reflecting optical system is loaded down with trivial details and resetting difficulty is larger.
For achieving the above object, the solution of the present invention comprises a kind of Method of Adjustment from axle four-reflecting optical system, comprises 4 catoptrons set gradually: primary mirror, secondary mirror, three mirrors and four mirrors from axle four-reflecting optical system; The step of this Method of Adjustment is as follows:
1), adjust primary mirror, make the optical axis of primary mirror parallel with the optical axis of incident beam;
2), microscope receives through the folded light beam of secondary mirror, regulates the position of secondary mirror, makes the imaging of the asterism picture in microscope meet second and impose a condition;
3), adjust the front and back position of three mirrors and the position of four mirrors, make the folded light beam after four mirrors meet third and fourth and impose a condition.
Step 1) in, microscope receives the folded light beam of primary mirror, regulates the position of primary mirror, and when the imaging satisfied first of the asterism picture in microscope imposes a condition, the optical axis of primary mirror is parallel with the optical axis of incident beam.
Step 3) in, first the front and back position of three mirrors is adjusted, make the parallax of the folded light beam after four mirrors meet the 3rd to impose a condition, then adjust angle and the center of four mirrors, make the imaging of the asterism picture of the folded light beam after four mirrors meet the 4th and impose a condition.
At completing steps 3) after, measuring resolution, if resolution meets setting requirement, has then debug, otherwise has readjusted four mirrors.
Three mirrors are level crossings.
Incident beam is parallel beam, is penetrated by the first parallel light tube.
Folded light beam after four mirrors is parallel beam, is received by the second parallel light tube.
The present invention proposes a kind of Method of Adjustment from axle four-reflecting optical system, by carrying out adjustment to debug respectively to 4 catoptrons such as primary mirrors, and determining its position one by one, only needing the position of an adjustment catoptron like this when debuging, whole process is simply effective; And can realize incident light is directional light, and outgoing is also directional light, and has certain enlargement ratio, can ensure from the anti-coaxial precision of axle four and picture element the best.
Accompanying drawing explanation
Fig. 1 debugs platform schematic diagram from the anti-system of axle four;
Fig. 2 is that principal reflection mirror debugs process schematic;
Fig. 3 is that secondary mirror debugs process schematic;
Fig. 4 plane mirror and four mirrors debug schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
From a Method of Adjustment for axle four-reflecting optical system, comprise 4 catoptrons set gradually from axle four-reflecting optical system: primary mirror, secondary mirror, three mirrors and four mirrors; The step of this Method of Adjustment is as follows:
1), adjust primary mirror, make the optical axis of primary mirror parallel with the optical axis of incident beam.
2), microscope receives through the folded light beam of secondary mirror, regulates the position of secondary mirror, makes the imaging of the asterism picture in microscope meet second and impose a condition.
3), adjust the front and back position of three mirrors and the position of four mirrors, make the folded light beam after four mirrors meet third and fourth and impose a condition.
Based on above technical scheme, by reference to the accompanying drawings, provide with next embodiment.
Fig. 1, for debug platform from the anti-system of axle four, uses three meters of parallel light tubes 3, for providing heavy caliber parallel beam from the anti-system of axle four.This is debug platform and also comprises: light source 1, target plate 2, mount support frock 4, base 5, turntable 6, position relationship as shown in Figure 1.Debuging of four catoptrons is carried out in mount support frock.
The step of this Method of Adjustment is as follows:
1), primary mirror is debug
As described in Figure 2, incident beam adopts three meters of parallel light tubes, and this parallel beam provides bore
parallel beam, target plate adopt star tester, in order to bore coupling, first the multiplying power of micro objective selects 40 times.Through the parallel beam bore 300mm of three meters of parallel light tube outgoing, cover the effective aperture of primary mirror completely, be focused at the focus place of primary mirror through the folded light beam of primary mirror.Find image space focal plane Position Approximate by shielding mode, movable microscope is placed in optimum position, then by adjustment lifting table, makes the circularity of picture point best.Again observing picture point size and whether covered (also can not be too small) by microscopical visual field, by changing the multiplying power of microscope camera lens, making observing effect reach best.Observe the asterism picture that hot spot Jiao is front and defocused, if there is aberration, by adjusting the depth of parallelism of primary mirror and installed surface, reduce or eliminate aberration, improve the image quality of primary mirror, make the most rounding of the asterism observed in microscope, now show that the optical axis of primary mirror is parallel with parallel light tube optical axis.
In order to prevent primary mirror to be out of shape, ensure the flatness of installed surface, can not be greater than 5um, the pad of primary mirror manual must be repaiied and grind, and once repaiies the amount of grinding all at micron order.Gib screw can not be gone up too tight, and in order to locking, screw is except a screw thread glue, and a kind of epoxy glue of import of head of screw point, this epoxy glue stress is little, and this is also that to control erection stress crucial.Primary mirror must leave standstill one to two days after debuging, and carries out stress relief, just can carry out secondary mirror and debug after primary mirror picture element no longer changes.
2), secondary mirror is debug
Secondary mirror has orientation, pitching, top to bottom, left and right, front and rear, rotation 6 degree of freedom, only has these 6 positions all to adjust to optimum position guarantee image quality optimum.As shown in Figure 3, judge to adjust the inclination of secondary mirror and bias according to the shape of the asterism picture observed in microscope, when the most rounding of the shape of asterism picture, secondary mirror imaging is to best position.Be now the result of the common imaging of primary and secondary mirror, but primary mirror can not move again, independent adjustment secondary mirror picture element is best.
The asterism often observed in microscope not circle, be even horizontal line before Jiao, defocused is vertical line, and this is exactly astigmatism, mainly secondary mirror bias and tilt to cause; Horizontal line and vertical line often not just, this mainly secondary mirror have rotated, need rotate secondary mirror, if desired need by the simulation of CODE V software.
3) debuging of, three mirrors---plane mirror and four mirrors
As shown in Figure 4, after loading onto plane mirror and four mirrors, this optical system is exactly a telescopic system, and incident light is directional light, and outgoing is also directional light, enlargement ratio 5 times, and light beam turns back 90 °.The folded light beam after four mirrors is received, 1 meter of parallel light tube and provide 3 of incident light meters of parallel light tubes in 90 ° at light path outlet 1 meter of parallel light tube.The front and back position of adjustment plane mirror, makes the parallax of the outgoing beam after four mirrors best, then adjusts angle and the center of four mirrors, make picture point the most clear, now complete and tentatively debug.Last test debug after resolution, resolution, as met the demands, has been debug, otherwise four mirrors of should resetting, till resolution meets the demands.
After debuging, this PV value from the anti-system of axle four be 1.02 λ, RMS value is 0.22 λ.
Be presented above concrete embodiment, but the present invention is not limited to described embodiment.Basic ideas of the present invention are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out embodiment without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (7)
1. from a Method of Adjustment for axle four-reflecting optical system, describedly comprise 4 catoptrons set gradually from axle four-reflecting optical system: primary mirror, secondary mirror, three mirrors and four mirrors; It is characterized in that, the step of described Method of Adjustment is as follows:
1), adjust primary mirror, make the optical axis of primary mirror parallel with the optical axis of incident beam;
2), microscope receives through the folded light beam of secondary mirror, regulates the position of secondary mirror, makes the imaging of the asterism picture in microscope meet second and impose a condition;
3), adjust the front and back position of three mirrors and the position of four mirrors, make the folded light beam after four mirrors meet third and fourth and impose a condition.
2. the Method of Adjustment from axle four-reflecting optical system according to claim 1, it is characterized in that, described step 1) in, microscope receives the folded light beam of primary mirror, regulate the position of primary mirror, when the imaging satisfied first of the asterism picture in microscope imposes a condition, the optical axis of primary mirror is parallel with the optical axis of incident beam.
3. the Method of Adjustment from axle four-reflecting optical system according to claim 2, it is characterized in that, described step 3) in, first the front and back position of three mirrors is adjusted, make the parallax of the folded light beam after four mirrors meet the 3rd to impose a condition, then adjust angle and the center of four mirrors, make the imaging of the asterism picture of the folded light beam after four mirrors meet the 4th and impose a condition.
4. the Method of Adjustment from axle four-reflecting optical system according to claim 3, is characterized in that, at completing steps 3) after, measuring resolution, if resolution meets setting requirement, has then debug, otherwise has readjusted four mirrors.
5. the Method of Adjustment from axle four-reflecting optical system according to claim 4, is characterized in that, described three mirrors are level crossings.
6. the Method of Adjustment from axle four-reflecting optical system according to claim 4, is characterized in that, described incident beam is parallel beam, is penetrated by the first parallel light tube.
7. the Method of Adjustment from axle four-reflecting optical system according to claim 4, is characterized in that, described folded light beam after four mirrors is parallel beam, is received by the second parallel light tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410682968.7A CN104360492B (en) | 2014-11-24 | 2014-11-24 | Adjusting method of off-axis four-reflector optical system |
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| CN201410682968.7A CN104360492B (en) | 2014-11-24 | 2014-11-24 | Adjusting method of off-axis four-reflector optical system |
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| CN104360492A true CN104360492A (en) | 2015-02-18 |
| CN104360492B CN104360492B (en) | 2017-01-18 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324421A (en) * | 2018-12-06 | 2019-02-12 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of debugging device and Method of Adjustment of off-axis formula optical system light path |
| CN110737103A (en) * | 2019-10-31 | 2020-01-31 | 中国科学院长春光学精密机械与物理研究所 | large-caliber off-axis catadioptric multichannel optical system assembling and adjusting method |
| CN110865465A (en) * | 2019-11-15 | 2020-03-06 | 中国科学院长春光学精密机械与物理研究所 | Device and method for adjusting horizontal reference of plane mirror |
| CN112284255A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Stress-free assembly and adjustment auxiliary tool and assembly and adjustment method for reflector of photoelectric product |
| CN113777797A (en) * | 2021-08-24 | 2021-12-10 | 长春理工大学 | Adjusting device and adjusting method for off-axis beam-reducing optical system |
| CN116243497A (en) * | 2022-12-30 | 2023-06-09 | 中国科学院长春光学精密机械与物理研究所 | Off-axis four-reflection telescope for space laser interferometry and adjustment method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324421A (en) * | 2018-12-06 | 2019-02-12 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of debugging device and Method of Adjustment of off-axis formula optical system light path |
| CN110737103A (en) * | 2019-10-31 | 2020-01-31 | 中国科学院长春光学精密机械与物理研究所 | large-caliber off-axis catadioptric multichannel optical system assembling and adjusting method |
| CN110737103B (en) * | 2019-10-31 | 2022-03-08 | 中国科学院长春光学精密机械与物理研究所 | Large-caliber off-axis catadioptric multichannel optical system assembling and adjusting method |
| CN110865465A (en) * | 2019-11-15 | 2020-03-06 | 中国科学院长春光学精密机械与物理研究所 | Device and method for adjusting horizontal reference of plane mirror |
| CN112284255A (en) * | 2020-10-29 | 2021-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | Stress-free assembly and adjustment auxiliary tool and assembly and adjustment method for reflector of photoelectric product |
| CN113777797A (en) * | 2021-08-24 | 2021-12-10 | 长春理工大学 | Adjusting device and adjusting method for off-axis beam-reducing optical system |
| CN113777797B (en) * | 2021-08-24 | 2023-09-26 | 长春理工大学 | Adjusting device and adjusting method for off-axis beam shrinking optical system |
| CN116243497A (en) * | 2022-12-30 | 2023-06-09 | 中国科学院长春光学精密机械与物理研究所 | Off-axis four-reflection telescope for space laser interferometry and adjustment method |
| CN116243497B (en) * | 2022-12-30 | 2024-04-12 | 中国科学院长春光学精密机械与物理研究所 | Off-axis four-reflection telescope for space laser interferometry and adjustment method |
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| CN104360492B (en) | 2017-01-18 |
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Inventor after: Wu Junru Inventor after: Dong Xuyong Inventor after: Tan Rui Inventor after: Li Chuankai Inventor after: Zeng Wei Inventor after: Xu Qinghe Inventor after: Sun Zinan Inventor after: Zhao Yanping Inventor before: Dong Xuyong Inventor before: Tan Rui Inventor before: Li Chuankai Inventor before: Zeng Wei Inventor before: Xu Qinghe Inventor before: Sun Zinan Inventor before: Zhao Yanping |
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