Computational camera method based superposition vortex light Sagnac effect detection device

A technology of computing camera and vortex light, which is applied in the direction of measuring devices, instruments, etc.

Active Publication Date: 2017-06-09
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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  • Application Information

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Problems solved by technology

At present, the device for detecting the Sagnac effect of superposition vortex light based on computational imaging method is the first public proposal in the world.

Method used

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  • Computational camera method based superposition vortex light Sagnac effect detection device
  • Computational camera method based superposition vortex light Sagnac effect detection device
  • Computational camera method based superposition vortex light Sagnac effect detection device

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Embodiment Construction

[0109] specific implementation plan

[0110] The implementation object of the present invention is Laguerre-Gauss beam (abbreviation LG beam), and concrete implementation steps are as follows:

[0111] A stable Gaussian beam is generated by (1) a laser generator resonator, and an incident high-power laser is attenuated by (2) an attenuation sheet, so that the laser enters a detectable range of an image sensor (13).

[0112] Afterwards, the propagation length of the light beam is extended by the mirror 1 (3), the mirror 2 (4), the mirror 3 (5), and the mirror 4 (6), so that the light spot diverges naturally during the propagation of the light, so that the beam expands The size requirements of the spatial light modulator for the light spot can also be met when the selection accuracy of the mirror is not high; after that, the beam passes through the beam expander (7), and the laser beam expander mainly has two purposes: one is to expand the diameter of the laser beam; The second...

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Abstract

The invention relates to a computational camera method based superposition vortex light Sagnac effect detection device, wherein Sagnac effect is produced by an interference ring formed on a helical wave array of superposition vortex light. The detection device comprises a laser, an attenuation slice, a reflector, a beam expander, an SLM (spatial light modulator), a convex lens, a diaphragm, a convex lens reflector, a charge coupled device (CCD) and an experimental table. Firstly, after the laser produces the Gauss beam, laser power is reduced through the attenuation slice; direction of propagation is changed via a reflector group to increase light spots; expansion of diameter of the laser beam and reduction of divergence angle of the beam are performed through the beam expander; superposition vortex light is modulated via the SLM, to-be-detected angular frequency is coupled to frequency change, and sensitive information content enters the CCD to be observed through a 4f imaging system. The computational camera method based superposition vortex light Sagnac effect detection device is simple in structure and high in flexibility and precision.

Description

technical field [0001] The invention relates to a device for detecting the Sagnac effect of superposition vortex light based on a computational imaging method. The Sagnac effect of vortex light in this paper refers to the Sagnac effect produced by the interference ring formed by the helical wave surface of the superposition vortex light. The Sagnac effect of superposition vortex light on the turntable is detected by the image sensor (CCD). The device has a simple structure, less noise sources, and better sensitivity and precision; with the development of technology in the future, it can reach the chip level; because theoretically, the number of topological cores l can be infinitely large, so with the development of technology, the sensitivity and accuracy of this device The accuracy can be further improved and can be applied to the design and research of future advanced detection devices. [0002] technical background [0003] The laser gyro senses the rotational speed of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 任元王琛谢璐杨跃德王刚邵琼玲
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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