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Measuring system for three-dimensional objects

A measurement system and object technology, applied in the field of three-dimensional object measurement system, can solve problems such as low measurement accuracy

Inactive Publication Date: 2008-11-12
视觉操作系统有限责任公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Known three-dimensional object measuring systems that work with LCD microdisplays therefore have the disadvantage of low measuring accuracy

Method used

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  • Measuring system for three-dimensional objects
  • Measuring system for three-dimensional objects

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Experimental program
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Embodiment Construction

[0017] exist figure 1 In , the three-dimensional object measurement system is all shown by reference numeral 1 . The main component of the object measuring system 1 is a strip projector 2 for generating a strip-shaped light pattern on an object 3 to be measured. The strip projector 2 comprises a light source 4 from which light illuminates a liquid crystal light modulator 5 . The liquid crystal light modulator 5 is an LCOS microdisplay having pixels arranged in a matrix shape that can be controlled to be bright and dark. Furthermore, object measuring system 1 has an electronic camera 6 . The pattern of the object 3 illuminated with the light pattern is recorded with the electronic camera 6 . Evaluation computer 7 evaluates the recorded pattern and calculates the three-dimensional shape of object 3 from it. Additionally, as in figure 1 As can be seen in , the strip projector 2 and the electronic camera 6 are controlled by a control circuit 8 . According to the invention, t...

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Abstract

The invention relates to a three-dimensional object measuring system (1) having a strip projector (2) for producing a strip-shaped light pattern on an object (3) to be measured, wherein the strip projector (2) comprises a light source (4) and a liquid crystal light modulator (5) with a matrix-type arrangement of pixels which can be controlled so as to be light and dark, and having an electronic camera (6) for recording images of the object (3) which is illuminated with the light pattern.; For the purpose of achieving a high measuring accuracy, the invention proposes that the strip projector (2) and the electronic camera (6) are actuated by means of a control circuit (8), which is designed such that, during the exposure time of an image, the pixels of the light modulator (5) are switched between light and dark, with the temporal progression of the switchover of the pixels being synchronized with the image recording.

Description

technical field [0001] The invention relates to a three-dimensional object measuring system, which has: a strip projector for generating a strip-shaped light pattern on an object to be measured, wherein the strip projector includes a light source and a liquid crystal light modulator, the liquid crystal The light modulator has pixels arranged in a matrix that can be controlled to be bright and dark; and an electronic camera for recording the pattern of the object illuminated with the light pattern. Background technique [0002] Such measuring systems are used to three-dimensionally measure the shape of the surface of any measuring object. Such object measuring systems, also known as 3D scanners, work according to the triangulation method, as described, for example, in DE 195 11 160 A1. Meanwhile, a device composed of a liquid crystal element (LCD) and an electronic camera is used as an optical sensor. A light pattern consisting of several light strips is projected onto the ...

Claims

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Application Information

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IPC IPC(8): G01B11/25G02F1/133G02B26/04
CPCG01B11/2513G01B11/00G01B11/25G02B26/04
Inventor 约尔格·弗里梅尔弗兰克·富尔曼
Owner 视觉操作系统有限责任公司
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