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Phase shifting optical projection three-dimensional measuring system and method

A three-dimensional measurement and light projection technology, applied in the field of three-dimensional measurement, to achieve accurate three-dimensional measurement, reduce vibration and other noise disturbances, and low-cost effects

Inactive Publication Date: 2016-11-23
GUANGXI NORMAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0010] In summary, in order to solve the existing technical problems, the technical problem to be solved by the present invention is to provide a three-dimensional measurement system and method for phase-shifting light projection

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  • Phase shifting optical projection three-dimensional measuring system and method
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  • Phase shifting optical projection three-dimensional measuring system and method

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Embodiment Construction

[0048] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0049] Such as figure 1 As shown, a phase-shifting light projection three-dimensional measurement system includes a single-mode laser 1, an optical beam expander system 2 composed of a focusing lens, a one-dimensional beam splitting grating 4, and an acousto-optic Modulator 8 , beam combiner 13 , focusing lens 15 and projection objective 16 .

[0050] The laser light generated by the single-mode laser 1 is diffused into a beam by the optical beam expander system 2 and then decomposed into two laser beams by the one-dimensional beam splitting grating 4. The one-dimensional beam splitting grating 4 is divided into two One-dimensional diffraction grating, and the light intensity of the two laser beams is the same. A ...

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Abstract

The invention relates to a phase shifting optical projection three-dimensional measuring system and method. A laser is generated by a single-mode laser device and is expanded into light beams through an optical beam expanding system. The light beams pass through a one-dimensional beam splitting grating and forms two light beams. The two light beams pass through an acousto-optic modulator and generate Bragg diffraction and are projected to a beam-combiner after angles are adjusted to form an interference light path. The interference light path passes through a focusing lens and is amplified by a projection object lens. Interference fringes are generated and projected to a measured object. The interference fringes projected on a surface of the measured object are captured by a CCD camera. The interference fringes are processed by a computer and finally a three-dimensional morphology of the measured object is recovered. The system combines an acousto-optic modulation technology with a phase shifting fringe frequency conversion technology, fast measures the three dimensional morphologies of the surfaces of the multiple objects with different structures on-machine, has the strong vibration resistance capability, realizes the on-machine measurement in a processing process, and especially has strong robustness for the object surface with the complex structure.

Description

technical field [0001] The invention relates to the field of three-dimensional measurement, in particular to a phase-shifting light projection three-dimensional measurement system and method. Background technique [0002] In the actual production process of modern industry and manufacturing, a lot of measurement work is required, so 3D shape measurement is playing an increasingly important role in modern industry and real life. Optical three-dimensional shape measurement has become one of the research hotspots because of its non-contact, high precision, high speed and other advantages. Optical three-dimensional shape measurement is a method and technology to obtain three-dimensional space information of objects by optical means. It has very important significance and Broad application prospects. [0003] The traditional three-coordinate contact probe three-dimensional measurement method has inherent defects: 1. There is a certain contact pressure during measurement, and me...

Claims

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Application Information

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IPC IPC(8): G01B11/25
CPCG01B11/2441G01B11/254
Inventor 朱勇建钟建平宋树祥漆广文
Owner GUANGXI NORMAL UNIV
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