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Method and device for measuring three-dimensional shape of mirror surface object

A technology of three-dimensional shape and measurement method, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems that non-continuous objects cannot be measured, non-continuous objects cannot be measured, and measurement accuracy cannot be given, so as to reduce the Effects of noise, fast acquisition speed, and the effect of taking into account measurement accuracy

Active Publication Date: 2020-09-15
HEBEI UNIV OF TECH
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Problems solved by technology

Compared with directly moving the display screen, this method improves the measurement accuracy, but the moving process will bring errors and cannot be used for the measurement of discontinuous objects
[0007] In summary, the above measurement methods either cannot measure discontinuous objects, or cannot give good measurement accuracy

Method used

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  • Method and device for measuring three-dimensional shape of mirror surface object
  • Method and device for measuring three-dimensional shape of mirror surface object
  • Method and device for measuring three-dimensional shape of mirror surface object

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Embodiment Construction

[0045] Specific examples of the present invention are given below. The specific embodiments are only used to further describe the present invention in detail, and do not limit the protection scope of the claims of the present application.

[0046] The invention provides a device for measuring the three-dimensional shape of a mirror object (referred to as the device, see figure 1 ), characterized in that the device includes a computer 1, a master camera 2, a slave camera 3, a refraction display screen 4, a reflective display screen 5, a half mirror 6 and a fixing device 7; the master camera 2, the slave camera 3, a refraction display Screen 4, reflection display screen 5, half mirror 6 and fixing device 7 are fixed on the optical platform; Refraction display screen 4, reflection display screen 5 and half mirror 6 are all perpendicular to the optical table; Fixing device 7 is in In the public field of view of the main camera 2 and the slave camera 3; the reflection display scre...

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Abstract

The invention discloses a three-dimensional morphology measurement method and a device for a objects with mirror surface. The device comprises a computer, a main camera, a slave camera, a refraction display screen, a reflection display screen, a semi-transparent mirror and a fixing device; the computer is connected with the main camera, the slave camera, the refraction display screen and the reflection display screen; the main camera, the slave camera, the refraction display screen, the reflection display screen, the semi-transparent mirror and the fixing device are fixed on an optical platform; the refraction display screen, the reflection display screen and the semi-transparent mirror are perpendicular to the optical platform; the fixing device is in a public field of the main camera andthe slave camera; image light paths reflected by the semi-transparent mirror are parallel to the image light path displayed on the refraction display screen. According to the three-dimensional morphology measurement method and the device for objects with mirror surface, object point normal vector is calculated firstly, then the morphology measurement of the objects of a continuous zone is calculated through using a gradient integration method and a binocular system; the morphology measurement of the objects of a discontinuous zone is obtained by using a direct-phase measurement deflection method and a dual-screen.

Description

technical field [0001] The invention relates to the field of specular object detection. Specifically, the invention relates to a method and device for measuring the three-dimensional shape of a specular object. Background technique [0002] With the development of integrated circuits, the automotive industry, advanced manufacturing and astronomy, it is particularly important to quickly and accurately measure the three-dimensional shape of mirror objects. In order to solve this practical problem, a variety of three-dimensional shape measurement methods of mirror objects have been continuously proposed, mainly divided into contact methods and non-contact methods. The contact measurement method is represented by a three-coordinate measuring machine, which is easy to operate and has high precision, but the measurement time is long and it is easy to cause scratches on the surface of non-rigid objects. The non-contact measurement method is based on modern optics, combined with i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 张宗华王月敏高楠孟召宗
Owner HEBEI UNIV OF TECH
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