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Single-photodetector confocal laser triangulation device

A technology of laser triangulation and photodetector, which is applied to measurement devices, optical devices, instruments, etc., to achieve the effect of reducing installation and adjustment requirements, clear imaging, and accurate positioning

Inactive Publication Date: 2007-07-11
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the prior art of laser triangulation, to provide a single-array photodetector confocal laser triangulation that can obtain real three-dimensional shape information and solve the problems caused by the inclination of the measured object surface. device

Method used

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  • Single-photodetector confocal laser triangulation device

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Embodiment Construction

[0019] As shown in Figure 1, the light beam emitted by the laser 1 is collimated by the collimator lens 2, then coupled into the aspheric lens 4 by the semi-reflective and semi-transparent plane mirror 3, and then incident on the focal point on the measured object surface 6 after focusing. The generated diffuse reflection light is reflected by the annular reflector 5 or directly enters the aspheric lens 4 for convergence, then is reflected by the semi-reflective and semi-transparent plane mirror 3 , and is imaged by the imaging lens 7 onto the area array photodetector 8 . Annular reflector 5 is a hollow reflector (the inner side is a spherical reflector or an aspheric reflector), and annular reflector 5 is an inverted ball table. The upper bottom surface of the ball table is a plane with a diameter, and the lower surface is equal table, and make the focus of the ball mirror outside the table. The collimating lens 2 and the imaging lens 7 have the same focal length.

[0020] D...

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Abstract

The invention relates to single photo detector cofocal laser triangulation. It provides authentic three dimensional data, solves the issues resulted from the oblique angle of the inspected surfaces. It comprises laser, collimation lens, half reflective half transparent lens, aspheric lens, ring type inner reflector, inspected surface, image forming lens, and side photo detector, with the collimation right in front of the laser beam, the included angle of the half reflective and half transparent lens optical axis and the collimation lens optical axis in 45 degree clockwise. The aspheric lens and the collimation lens share the same optical axis. The center of sphere of the ring reflector shares the same optical axis with the single beam released by the symmetrical axis and the laser, collimation lens and the aspheric lens. The optical axis of the image forming lens is perpendicular with the light beam of the laser. The photo detector is set at the focal position of the imaging lens.

Description

technical field [0001] The invention relates to a measuring device, in particular to a confocal laser triangulation measuring device for a single array photodetector. Background technique [0002] Because the laser triangulation method has the characteristics of non-contact, not easy to damage the surface, wide material adaptability, simple structure, strong anti-interference ability, small measurement point, high measurement accuracy and can be used for real-time online rapid measurement, etc., it has been obtained in the field of geometric quantity measurement. With a wide range of applications, people have been exploring to enrich and perfect it with the most modern science and technology, and strive to further simplify the structure, improve accuracy, broaden the scope of application, and meet the needs of industrial production. [0003] The laser triangulation method is divided into reflection type and transmission type according to the detection method (Liu Ming, Zeng ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24G01B11/00
Inventor 黄元庆万瑾颜黄苹吴兆喜胡天林
Owner XIAMEN UNIV
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