Color confocal three-dimensional morphology measuring method and system

A three-dimensional shape, color confocal technology, applied in the field of optical measurement, can solve problems such as inability to guarantee linearity, achieve the effect of improving measurement speed, high axial resolution, and avoiding time-consuming problems

Inactive Publication Date: 2019-02-22
HUAQIAO UNIVERSITY
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Problems solved by technology

[0009] However, the disadvantage of the above invention is that at least two fringes with different phases are required to be projected onto the surface of the measured object before subsequent imag

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  • Color confocal three-dimensional morphology measuring method and system
  • Color confocal three-dimensional morphology measuring method and system
  • Color confocal three-dimensional morphology measuring method and system

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0034] A color confocal three-dimensional shape measurement method, in which monochromatic light of different wavelengths is focused on the surface of a measured object 30, and the reflected monochromatic light is received by a color camera 20 to obtain a color image; the color of the monochromatic light is calibrated based on the HSI color model Convert the color information of each pixel point in the color image into height information to obtain the height value of each point in the color image; combine the horizontal coordinate information of each point to reconstruct the three-dimensional shape of the surface of the measured object 30 appearance.

[0035] The basic idea of ​​the present invention is to use the color camera 20 as the data receiving end to obtain a color image of the entire surface of the measured object 30 by taking a singl...

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Abstract

The invention relates to a color confocal three-dimensional morphology measuring method and system. A polychromatic light source is employed and a relationship between wavelength colors and displacement is obtained through axial dispersion, so that a time consuming problem caused by axial scanning is solved and the measuring speed is increased. A stray signal of a focal plane is obtained is filtered through a small hole and a sharp signal located at the focal plane is obtained, so that the high axial resolution is realized. A color camera is used as the data receiving end and thus all height information of the surface of the measured object in the view field can be obtained by shooting once, so that the measuring speed is increased. The color confocal three-dimensional morphology measuringmethod is especially suitable for the color confocal parallel scanning system. According to the invention, the height information extraction of the measured object point is completed only by one imaging; and the three-dimensional topographical feature of the measured object surface is obtained by combining the two-dimensional information provided by the two-dimensional displacement system. Therefore, a novel path is provided for detection of the three-dimensional morphology of the surface of the object.

Description

technical field [0001] The invention relates to the field of optical measurement, more specifically, to a color confocal three-dimensional shape measurement method and a color confocal three-dimensional shape measurement system. Background technique [0002] With the rapid development of science and technology and manufacturing, precision metrology technology represented by surface three-dimensional shape measurement has attracted more and more attention from scholars, and more and more fields have great demand for three-dimensional shape measurement of objects. , such as machinery and automobile manufacturing, medical imaging measurement, space remote sensing, etc. In the field of medicine, the department of stomatology uses three-dimensional measuring instruments to measure teeth, the department of plastic surgery uses three-dimensional imaging of the appearance of human skin for scheme design and operation implementation, and the cardiac surgery uses detection and monitor...

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Application Information

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IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 余卿崔长彩程方张昆张一周瑞兰訾梦超邹景武叶瑞芳王寅
Owner HUAQIAO UNIVERSITY
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