Liquid-crystal adaptive optical system with compact structure and high sensitivity

A liquid crystal adaptive, high-sensitivity technology, applied in the field of adaptive optics, to achieve the effect of simplified structure, improved accuracy, and fewer components

Active Publication Date: 2012-07-04
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0006] The present invention aims at the deficiencies of the above-mentioned liquid crystal self-adaptive system, and further optimizes the design. The purpose is to provide a compact and high-sensitivity liquid crystal self-adaptive optical system, which solves the problem of imag

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  • Liquid-crystal adaptive optical system with compact structure and high sensitivity
  • Liquid-crystal adaptive optical system with compact structure and high sensitivity
  • Liquid-crystal adaptive optical system with compact structure and high sensitivity

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Embodiment Construction

[0020] 1) The first lens 2, the second lens 5, the third lens 6, the fourth lens 8, the sixth lens 15, and the seventh lens 19 are all double-cemented achromatic lenses, and the surface is coated with an anti-reflection film, and the apertures are all 30mm, the focal lengths are 51.8mm, 100mm, 100mm, 200mm, 200mm, 100mm respectively, the fifth lens 10 is also double cemented achromatic lens, the surface is coated with an anti-reflection coating, the aperture is 50mm, and the focal length is 200mm.

[0021] 2) The fast galvanometer 3 is a closed-loop self-adaptive driving fast galvanometer (Germany PI Company), with a diameter of 20mm, an actual diameter of 5.85mm, a reflectivity greater than 97%, and a PV value of surface flatness less than λ / 20, where λ =633nm, maximum rotation range 2mrad, resolution 0.1μrad.

[0022] 3) The Hartmann wavefront detector 7 has a receiving aperture of 5.85mm, the microlens array is 9×9, and the CCD on its back is a high-sensitivity EMCCD (DV897...

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Abstract

The invention belongs to the field of adaptive optics, relates to a liquid-crystal adaptive optical imaging system for an atmospheric channel, and discloses a liquid-crystal adaptive optical system with compact structure and high sensitivity for realizing energy optimization and distribution of a detection branch and a correction imaging branch. The liquid-crystal adaptive optical system consistsof a wavefront detection branch, a correction imaging branch, a third reflecting lens and a Dove prism. Through introducing and optically combing the Dove prism with a fixed reflecting lens, a rotatable reflecting lens and a dichroic mirror, the switching between an adaptive imaging optical path and a liquid-crystal corrector response measuring optical path is realized, so that the aligning precision of the optical paths is not affected, the problem that in two processes of wavefront detection and corrector response matrix measurement, the section of an optical beam entering a Hartmann wavefront detector turns over is solved, and the reading sequences of detection data and corrector response measuring data are consistent; and the butt joint of the response matrix measuring optical path and the wavefront detection is finished by the dichroic mirror, so that the optical design of the detection branch is simplified.

Description

technical field [0001] The invention belongs to the field of adaptive optics, and relates to a combined system of optical elements such as a liquid crystal corrector, a Hartmann wavefront detector, an adaptive optics controller, a dichroic mirror, a PBS beam splitter, and a Dove prism. A compact high-sensitivity liquid crystal adaptive optics system. Background technique [0002] The function of the optical wavefront adaptive correction system is to compensate and correct the distorted wavefront of the incident light in real time to obtain ideal optical imaging. The liquid crystal corrector adopts microelectronic technology, utilizes the characteristics of high pixel density of liquid crystal devices, has the characteristics of high correction precision and mature manufacturing process, so the adaptive system of liquid crystal corrector has great application potential. However, the liquid crystal corrector must work in polarized light. If the adaptive system is designed in ...

Claims

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Application Information

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IPC IPC(8): G02B26/06G02B26/08G02B27/00
Inventor 宣丽曹召良穆全全彭增辉胡立发李大禹刘永刚姚丽双夏明亮杨程亮鲁兴海
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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