Liquid crystal-deformable mirror mixed type adaptive system matched with 2-meter telescope
An adaptive system, deformable mirror technology, applied in the field of adaptive optics
Active Publication Date: 2017-03-22
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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[0006] Aiming at the defects of near-infrared to mid-infrared wide-band wavefront self-adaptive correction imaging of a 2-meter large-caliber telescope, the present invention provides a dual-corrector adaptive optics that matches a 2-meter-caliber telescope and mixes a liquid crystal corrector and a deformable mirror System, the purpose is to realize 700nm ~ 2500nm broadband adaptive correction imaging
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[0026] A liquid crystal-deformable mirror hybrid adaptive optics system supporting a 2m aperture telescope was built.
[0027] The key parameters of the device used are:
[0028] The first lens 1 is a triplet achromatic lens with a diameter of 30mm and a focal length of 200mm; the other lenses are all doublet achromatic lenses, the second lens 5 has a diameter of 30mm and a focal length of 547mm, and the third lens 9 has a diameter of 30mm and a focal length of The aperture of the fourth lens 10 is 10mm and the focal length is -43.2mm; the aperture of the fifth lens 12 is 25.4mm and the focal length is 100mm; the aperture of the sixth lens 13 is 20mm and the focal length is 200mm; the aperture of the seventh lens 16 is 15mm and the focal length The aperture of the eighth lens 18 is 25.4mm and the focal length is 300mm; the aperture of the ninth lens 21 is 25.4mm and the focal length is 300mm; the aperture of the tenth lens 24 is 20mm and the focal length is 270mm;
[0029] Fa...
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The invention provides a liquid crystal corrector and deformable mirror mixed double-corrector adaptive optical system matched with a 2-meter-caliber telescope, and aims to realize wide-spectrum band adaptive correction imaging of 700nm to 2500nm. The adoptive optical system adopts a 20*20 unit Hartmann wavefront detector, a 97-effective unit deformable mirror capable of working in short wave infrared to intermediate and far infrared wave bands and a 256*256 pixel liquid crystal corrector capable of working in near infrared wave bands. Low- and high-order two-stage correction is adopted, the deformable mirror corrects the previous 42 items of Zernike low-order modes, then a light beam after one-stage correction is split into two beams, and long wave bands which are longer than 950nm can meet a high-resolution imaging requirement; and for wave bands of 700nm to 950nm, and the liquid crystal corrector is utilized to perform secondary correction on the 43th to 102th items of Zernike modes, thereby achieving an optical diffraction limit imaging resolution ratio which is double that of a 2-meter telescope in a full-wave band.
Description
technical field [0001] The invention belongs to the field of adaptive optics, and is a liquid crystal-deformable mirror hybrid adaptive optics imaging system matched with a 2-meter large-diameter telescope. The combination of liquid crystal correctors, deformable mirrors, fast galvanometers, wavefront detectors, adaptive optics controllers, color separation plates and other optical elements can realize near-infrared to mid-infrared broadband wavefront adaptive correction imaging. Background technique [0002] The function of the optical wavefront adaptive correction system based on the large-aperture ground-based telescope is to compensate and correct the distorted wavefront of the incident light in real time to obtain ideal optical imaging. [0003] The wavefront corrector is the key component of the adaptive optics system. The traditional adaptive optics system has only one wavefront corrector, and the adaptive correction system using the deformable mirror has the advanta...
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Login to View More IPC IPC(8): G02B26/06G02B27/00G02B17/08
CPCG02B17/0848G02B26/06G02B27/0012
Inventor 宣丽曹召良穆全全李大禹张佩光王少鑫杨程亮姚丽双刘永刚彭增辉徐焕宇张杏云王启东王玉坤孙飞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI