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Closed-loop adaptive optics system based on dynamic hologram

An adaptive optics and hologram technology, applied in instruments and other directions, can solve the problems of high cost and complex structure, and achieve the effect of low cost, simple structure and reliable performance

Active Publication Date: 2016-11-09
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of complex structure and high cost in the existing adaptive optics system, the present invention provides a dynamic hologram-based closed-loop adaptive optics system with simple structure, reliable performance and low cost

Method used

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  • Closed-loop adaptive optics system based on dynamic hologram
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specific Embodiment approach 1

[0019] Such as figure 1 As shown, the closed-loop adaptive optical system based on the dynamic hologram of the present invention is composed of a liquid crystal spatial light modulator 1, a CCD camera 2 and a beam splitting prism 3. In the device 1, the liquid crystal spatial light modulator 1 modulates the incident light and reflects it back into the dichroic prism 3, and the reflected light is incident on the target surface of the CCD camera 2 after being split by the dichroic prism 3, and a part of the CCD camera 2 The target surface is used to collect the holographic image plane spot 4 , and the other part of the target surface is used to collect the imaging spot 5 , and the holographic image plane spot 4 and the imaging spot 5 are spatially separated through the modulation of the liquid crystal spatial light modulator 1 .

[0020] According to the basic principle of the holographic wavefront sensor, the holographic wavefront sensor used to detect the wavefront aberration ...

specific Embodiment approach 2

[0028] Such as figure 2 As shown, the closed-loop adaptive optics system based on the dynamic hologram of the present invention is composed of a liquid crystal spatial light modulator 1 and a CCD camera 2, and the angle between the normal of the liquid crystal spatial light modulator 1 and the incident light is less than 15°. The liquid crystal spatial light modulator 1 modulates the incident light and reflects it to the target surface of the CCD camera 2, a part of the target surface of the CCD camera 2 is used to collect the holographic image plane spot 4, and the other part of the target surface is used to collect the imaging spot 5 , the holographic image plane light spot 4 and the imaging light spot 5 are spatially separated by the modulation effect of the liquid crystal spatial light modulator 1 .

[0029] According to the basic principle of the holographic wavefront sensor, the holographic wavefront sensor used to detect the wavefront aberration represented by the n-te...

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Abstract

A closed-loop adaptive optics system based on dynamic holograms relates to the field of adaptive optics systems and solves the problems of complex structures and high costs in existing adaptive optics systems. Solution 1: The system includes a liquid crystal spatial light modulator, a CCD camera and a beam splitter. The incident light is incident on the liquid crystal spatial light modulator after being split by the beam splitter prism. The liquid crystal spatial light modulator modulates the incident light and reflects it back to the splitter Prism, the reflected light is incident on the target surface of the CCD camera after being split by the beam-splitting prism to form a spatially separated holographic image surface spot and imaging spot. Scheme 2: The system includes a liquid crystal spatial light modulator and a CCD camera. The angle between the normal of the liquid crystal spatial light modulator and the incident light is less than 15°, and the incident light is reflected to the CCD camera after being modulated by the liquid crystal spatial light modulator. On the target surface, a spatially separated holographic image plane spot and an imaging spot are formed. The invention has simple structure, reliable performance and low cost.

Description

technical field [0001] The invention relates to the technical field of adaptive optical systems, in particular to a closed-loop adaptive optical system based on a dynamic hologram. Background technique [0002] The adaptive optics system can correct the wavefront aberration in real time, so that the optical system can reach or approach the diffraction-limited image quality level. In recent years, adaptive optics systems have been widely used in various fields of optical technology, such as ground-based astronomical observation, fundus imaging, laser beam shaping, laser weapons, and free-space optical communication systems. Existing adaptive optics systems generally consist of independent wavefront sensors, wavefront correctors, and imaging components. This type of system is complex in structure, relatively bulky, and difficult to assemble and adjust. The large number of components increases the cost of the system. Therefore, it is urgent to develop a new adaptive optics sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/12
Inventor 王建立姚凯男刘欣悦
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI