Novel co-phase detection method and device for segmented telescope

A detection device and telescope technology, applied in the direction of testing optical performance, etc., can solve the problems of low resonance frequency, low co-phase adjustment efficiency, large aperture inertia of a single spliced ​​sub-mirror, etc., and achieve fast piston error adjustment and fast co-phase detection. , the effect of high energy utilization

Active Publication Date: 2018-11-16
EAST CHINA JIAOTONG UNIVERSITY
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Problems solved by technology

[0004] In the prior art, there are many methods for detecting the piton error of spliced ​​telescopes, such as phase difference method, curvature sensing technology, wide-narrow-band Shaker-Hartman method, quadrangular pyramid wavefront detector method, dispersion fringes, and dispersion Rayleigh interferometry. , dual-wavelength detection and other methods, but these methods cannot simultaneously achieve large-scale, high-precision, high-energy utilization, and faster detec

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  • Novel co-phase detection method and device for segmented telescope
  • Novel co-phase detection method and device for segmented telescope
  • Novel co-phase detection method and device for segmented telescope

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[0040] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0041] Such as figure 1 As shown, the present invention is a novel co-phase detection device applied to block-type splicing telescopes, comprising: splicing telescope 1, collimating lens 2, block-type deformable mirror 3, 4f system 4, first beam splitting prism 5, splicing mirror MASK 6, a first Shaker-Hartmann wavefront detector (S-H) 7, a beam splitting prism 8, a second Shaker-Hartmann wavefront detector 9, an imaging system 10 and a control system 11.

[0042] The splicing telescope 1 receives peripheral incident light from the object to be measured, and converges it into outgoing light for emission.

[0043] The collimating lens 2 refracts the outgoing rays into parallel rays or nearly parallel rays.

[0044] The segmented deformable mirror 3 reflects the light beam from the collimating lens 2 to the 4f system 4 .

[0045] The 4f system wil...

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Abstract

A novel co-phase detection method and device for a segmented telescope are provided. The device comprises a segmented mirror telescope, a collimating lens, a segmented deformable mirror, a 4f system,a first beam splitter, a second beam splitter, a segmented mirror MASK, a Shaker-Hartmann wavefront detector, an imaging system and a control system. A white-light (400nm to 700nm) incoherent patternand a white-light ideal Airy disk pattern are used as a template, a segmented mirror piston error is calculated by using a cross-correlation algorithm, and the segmented mirror piston error is quicklyadjusted by adjusting the segmented deformable mirror. The detection method and a photoelectric detection system have unlimited ranges and high precision and quickly detect and adjust the piston error without increasing the complexity of an existing detection system.

Description

technical field [0001] The invention relates to the field of optical co-phase detection, in particular to a novel co-phase detection method and device applied to segmented splicing telescopes. Background technique [0002] With the continuous development of active optical technology, computer technology, sensor technology and advanced optical processing technology, splicing technology has become the main technical means for the continuous increase of the aperture of large-aperture telescopes. The co-phase detection technology of splicing mirrors is one of the key technologies to ensure accurate splicing and maintain mirror quality. Quantitative measurement data is the basis for guiding the deterministic adjustment of splicing, and is also the fundamental guarantee for high-quality splicing mirror imaging and high telescope angular resolution. [0003] At present, the splicing technology of large-aperture telescopes is a hot topic that the world's technologically developed co...

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Application Information

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IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 李斌吴建刘燕德
Owner EAST CHINA JIAOTONG UNIVERSITY
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