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A stripe projection lens for three-dimensional measurement

A technology of three-dimensional measurement and fringe projection, which is applied in the field of optical lenses, can solve the problems of weak light transmission performance of projection lenses, inability to meet the high light transmission capacity and high definition of three-dimensional measurement systems, and low resolution, so as to maximize the field of view, The effect of light weight and low cost

Active Publication Date: 2020-03-10
GUANGXI NORMAL UNIV
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Problems solved by technology

[0004] However, the projection lens of the traditional acousto-optic fringe method for three-dimensional measurement has weak light transmission performance and low resolution, which cannot meet the requirements of high light transmission ability and high definition of the three-dimensional measurement system.

Method used

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  • A stripe projection lens for three-dimensional measurement
  • A stripe projection lens for three-dimensional measurement
  • A stripe projection lens for three-dimensional measurement

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Embodiment Construction

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] see figure 1 , the invention provides a fringe projection lens for three-dimensional measurement. The striped projection lens for three-dimensional measurement includes a front lens group with negative refractive power, a diaphragm, and a rear lens group with positive refractive power in sequence from the object side to the image side, and the front lens group includes sequentially from the object side to the image side. The first lens L1, the second lens L2 and the third lens L3. The rear lens group 30 includes a fourth lens L4 , a fifth lens L5 , a sixth lens L6 and a se...

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Abstract

The invention provides a fringe projection lens for three-dimensional measurement. The fringe projection lens comprises a front lens group having negative focal power, a diaphragm and a rear lens group having positive focal power in sequence from an object side to an image side. The front lens group comprises a first lens, a second lens and a third lens in sequence from the object side to the image side. The first lens is a meniscus lens having negative focal power; the second lens is a biconcave lens having negative focal power; and the third lens is a biconvex lens having positive focal power. The rear lens group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side. The fourth lens is a biconvex lens having positive focal power; the fifth lens is a biconcave lens having negative focal power; the sixth lens is a biconvex lens having positive focal power; and the seventh lens is a meniscus lens having negative focal power. The fringe projection lens can realize low cost, light weight, small distortion, small size and high light transmission performance, and meets high-definition projection requirement.

Description

【Technical field】 [0001] The invention relates to an optical lens, in particular to a fringe projection lens for three-dimensional measurement. 【Background technique】 [0002] There are many methods for three-dimensional measurement of structured light. The traditional method is to use computer-generated fringes and project the fringes to obtain the three-dimensional contour image of the target object, that is, to project the computer-generated fringe image onto the target object to obtain the three-dimensional contour of the target object. image, but this approach is limited by depth of focus, projected area and sharpness, and to some extent by lamp life. [0003] In order to solve the inherent defects of the traditional fringe projection method in three-dimensional measurement, the method of using the acousto-optic fringe method instead of the fringe projection method for three-dimensional measurement came into being. The acousto-optic fringe method replaces the method of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/18G02B13/00G02B13/06G01B11/24
CPCG01B11/2433G02B13/0045G02B13/06G02B13/18
Inventor 朱勇建刘伟涛夏海英
Owner GUANGXI NORMAL UNIV
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