Component prism-based phase diversity wavefront sensor

A wavefront sensor and phase difference technology, used in instruments, scientific instruments, measuring devices, etc., can solve the problems of easy mutual interference of first-order diffracted beams, difficult grating processing, and high requirements, so as to improve the detection ability and increase the processing difficulty. , The effect of processing is not difficult

Active Publication Date: 2012-07-11
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

This solution has higher requirements on the size of the photosensitive surface of the CCD, and the processing of the grating is more difficult, and the diffraction beams at all levels are easy to interfere with each other

Method used

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  • Component prism-based phase diversity wavefront sensor
  • Component prism-based phase diversity wavefront sensor
  • Component prism-based phase diversity wavefront sensor

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Embodiment Construction

[0023] Such as figure 1 , 2As shown, the combined prism-based phase difference wavefront sensor of the present invention includes: a lens 1 , a combined prism 2 , an imaging detector CCD 3 and a computer 4 . The combined prism 2 is composed of the first dichroic prism S1 and the second dichroic prism S2, the first right-angle triangular reflector S3 and the second right-angle triangular reflector S4; first, the parallel light beam containing the distorted wavefront is irradiated vertically on the surface of the lens 1, After being focused by the lens 1, the parallel light beam becomes a converging light beam, and the converging light beam is vertically incident on the front surface of the first dichroic prism S1 in the combination prism 2, and the incident light beam is divided into two beams by the first dichroic prism S1, and the transmitted light beam is in accordance with the original The direction continues to propagate, and after the second beam splitting prism S2, the ...

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Abstract

The invention relates to a component prism-based phase diversity wavefront sensor comprising a lens, a component prism, a CCD imaging detector, and a computer system. After a parallel light beam containing wavefront distortion passes through the lens and is focused, the focused light beam is vertically irradiated on a front surface of the component prism; after the light beam passes through the component prism, an incident light beam is split into two beams of lights; and two beams of lights emitted by the component prism are imaged on a CCD photosensitive surface, wherein there is a fixed light path difference between the two beams of lights. According to the invention, the optical structure of the sensor is simple; the CCD imaging detector can simultaneously collect a focal plane light intensity distribution image and a defocused light intensity distribution image, so that the synchronism and the real-time property of the two images can be ensured as well as detection precision of the phase diversity wavefront sensor on dynamic aberration and restorability on an expansion object can be effectively improved; and moreover, the provided phase diversity wavefront sensor has obvious advantages in fields like optical detection, adaptive optics, high resolution imaging and the like.

Description

technical field [0001] The invention relates to a wavefront sensor based on phase difference, in particular to a phase difference wavefront sensor based on combined prisms. Background technique [0002] Due to its simple structure, no special requirements on the light source and high measurement accuracy, the phase difference wavefront sensor is used as a wavefront sensor in the field of adaptive optics. Gonsalves R A in "Wavefront sensing by phase retrieval", in Applications of Digital Image Processing III, Proc. SPIE, vol.207, 1979 and "Phase retrieval and diversity in adaptive optics" Opt Eng, Vol.21, 829-832, 1982 In the two articles, it is proposed to add a defocus aberration of known size to the wavefront to be measured, and accurately measure the focal plane light intensity distribution and multiple light intensity distributions located on different defocus planes. Based on the least squares estimation, the GS The iterative algorithm accurately restores the distorted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J9/00G02B27/10
Inventor 罗群饶长辉王晓华顾乃庭黄林海
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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