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Optimized distribution method for energy of liquid crystal adaptive optical system

A liquid crystal adaptive and optical system technology, applied in the field of adaptive optics, to achieve the effects of reducing residual error, improving correction effect, and improving detection sensitivity

Active Publication Date: 2011-05-25
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0008] In summary, in order to solve the time problem between the detection branch and the correction imaging branch in the liquid crystal adaptive optics system, the present invention proposes an optimal distribution mode of light energy between the correction imaging branch and the wavefront detection branch, the purpose of which is to A liquid crystal adaptive optics system energy optimization distribution method is provided, so that the light energy distribution between the correction imaging branch and the wavefront detection branch of the liquid crystal adaptive optics system is reasonable, and the detection ability of the liquid crystal adaptive optics system can be greatly improved. And relatively improve its correction speed

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Embodiment Construction

[0018] A xenon lamp whose spectrum is closer to that of white light is coupled into a bundle of optical fibers. The core diameter of each fiber is 25 μm, and the diameter of the fiber bundle is 1 mm. Fiber bundle adaptive correction imaging experiment:

[0019] 1. According to figure 2 To build an adaptive optics system, regardless of the existence of the telescope, the optical fiber bundle light source is located at the front focus of the first lens 8, forming a closed optical path of the adaptive optics system. Put a 40W electric soldering iron as a thermal interference source behind the first lens 8 and under the light beam, so that the optical wavefront is dynamically distorted.

[0020] 2. The first lens 8, the second lens 10, the third lens 11, and the fourth lens 9 are double-cemented achromatic lenses, and the surface is coated with an anti-reflection coating. The aperture is 20mm, and the focal lengths are 200mm, 200mm, and 100mm respectively. , 200mm; the aperture...

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Abstract

The invention belongs to the field of adaptive optics and relates to an optimized distribution method for light energy between a corrosion imaging subcircuit and a wavefront sensing subcircuit in a liquid crystal adaptive optical system. The basic thought of the method is that: the polarizing beam splitting design of the sensing subcircuit and the corrosion imaging subcircuit is changed into spectrophotometry; a beam splitting wavelength is calculated according to a response signal intensity ratio of the receiving terminal devices of the two subcircuits, which is 1:1; the light energy of a wide short wave band with dispersion and a high wave front distortion change speed is distributed to the sensing subcircuit and the light energy of a narrow long wave band without dispersion and with a low wave front distortion change speed is distributed to the correction imaging subcircuit; light in the correction imaging subcircuit is split into two paths of polarized light by using a polarizing beam splitter (PSB), and two liquid crystal correctors are arranged correspondingly; and after correction, a light beam is combined to form an image. The method can improve the sensing capacity of the liquid crystal adaptive optical system considerably, and correspondingly improve the correction speed of the liquid crystal adaptive optical system.

Description

technical field [0001] The invention belongs to the technical field of adaptive optics, and relates to a combination of optical elements such as a liquid crystal corrector, a Hartmann wavefront detector, an adaptive optics controller, a color separation plate, and a PBS beam splitter. A method for optimizing the distribution of light energy between the correction imaging branch and the wavefront detection branch in an 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. [0003] The liquid crystal corrector of the liquid crystal adaptive optics system adopts microelectronics technology, utilizes the characteristics of high pixel density of liquid crystal devices, has high correction precision, and has a mature manufacturing process. Therefore, the adaptive system of the liquid crystal correc...

Claims

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Application Information

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IPC IPC(8): G02B26/06G01J9/00
Inventor 宣丽穆全全曹召良胡立发彭增辉刘永刚李大禹鲁兴海
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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