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Method and device for detecting the shape of a three-dimensional object

A technology for three-dimensional objects and equipment, which is applied in the field of detecting the shape of three-dimensional objects, and can solve problems such as long measurement time

Inactive Publication Date: 2009-10-14
CALLIDUS PRECISION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of all the above-mentioned methods is that they require a long measurement time, typically many seconds, and in the case of high precision requirements, the measurement needs to last many minutes

Method used

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  • Method and device for detecting the shape of a three-dimensional object
  • Method and device for detecting the shape of a three-dimensional object
  • Method and device for detecting the shape of a three-dimensional object

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Embodiment Construction

[0025] figure 1 It schematically shows the device for optical detection of three-dimensional shape with dual measurement channels of the present invention, and a femtosecond laser 14 is irradiated onto a measurement object 10 . The light of the laser 14 is output from the beam splitter 16 and directed to the measurement object 10, and another part of the light passing through the beam splitter 16 will pass through the high reflection mirror 20 with a suitable delay and be deflected to the converter 12 for intensity encoding. The converter 12 is a non-linear fast switching filter, such a filter can be used for example from the RG series (Firma Schott, Germany). The light scattered on the measurement object 10 is guided by means of the lens system 18 through the excited decolorized region (Volume) of the nonlinear absorber (converter 12 ). After the scattered light of the measuring object 10 passes through the converter 12 , it is imaged on the surface of the CCD camera by mean...

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Abstract

The object of the present invention is to provide a device and a method for detecting the shape of a three-dimensional object, the detection time of which is extremely short, especially significantly shorter than the detection time of known methods under the current technical conditions, so that the method is also suitable for detecting fast movements or rapidly changing three-dimensional shape of the measured object. According to the invention, the propagation time of the light scattered and / or reflected and / or emitted by the object to be measured is coded as light intensity modulation and the light intensity or light intensity distribution is measured. The shape of the three-dimensional object can be obtained from the measured value of the light intensity distribution.

Description

technical field [0001] The invention relates to a method and equipment for detecting the shape of a three-dimensional object. Background technique [0002] The method of detecting the shape of an object has been applied in industrial production, especially in many fields of quality control. It converts the geometric data of the object into digital data in the computer through suitable measuring equipment, and then realizes the control of dimensional accuracy and other parameters through the program. [0003] Various mechanical and optical methods are known for detecting the shape of an object. In the mechanical method, the typical way is to detect and measure the object point by point with the help of sensors, and then determine the three-dimensional shape of the object by connecting the point by point measurement results to each other. The disadvantage of this method is that, on the one hand, it is necessary to contact the measured object mechanically; on the other hand, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24G01S17/89
CPCG01S17/89G01B11/24G01S17/00
Inventor 拉尔夫·门策尔
Owner CALLIDUS PRECISION SYST