Production method and device of projection structural light

A generation method and structured light technology, applied in optics, optical components, instruments, etc., can solve problems such as difficulty in generating sinusoidal structured light, phase shift speed and reliability limitations, poor stability, etc., to achieve good controllability and universal application High performance, strong anti-interference ability and good stability
CN1414412AInactive Publication Date: 2003-04-30TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2003-04-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

In the invention, the beam of the coherent source through the procedures of beam splitting, diffraction, fine tuning the direction, spatial filtering, the light beam spacing transformation as well asfocusing and magnifying is projected on the scene to obtain the structure light of the static stripes with intensity in sine distribution. The two parallel beams after being split enter the two inputends of double acousto-optical modulators with the Bragg angle. The double acousto-optic modulators of the radio frequency signal in same frequency with 0-2 pi tunable phase difference are utilized to change the frequency of the signal in real time. The device includes the coherent source, the filter, the focusing lens and microscope objective.
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Description

technical field

[0001] The present invention relates to a method and device for generating projected structured light, more specifically to a technology for real-time generating projected structured light with spatial frequency conversion and phase shifting. Background technique

[0002] The 3D sensing technology based on fringe structured light projection and phase measurement has the characteristics of full-field, non-contact, and fast information acquisition. This method does not require any mechanical or optical scanning mechanism and has high measurement accuracy, so it has been extensively researched and developed. The method and device for generating fringe structured light and known spatial phase shift are the key links of fringe structured light projection and phase measurement technology. At present, the main two types of methods for generating fringe structured light projection are laser interference projection and white light grati...

Claims

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