A dual light source specular reflective surface measurement system

Abstract

The invention discloses a dual-light source specular reflection surface measurement system which comprises a first point light source array and a camera used for recording a light ray which is emitted by the first point light source array and reflected by an object to be tested, wherein a light splitter is arranged between the first point light source array and the object to be tested, a second point light source array is arranged at one side of the light splitter, a light array of the second point light source array is projected into a video camera after being reflected by the light splitter and the object to be tested. A key part of the dual-light source specular reflection surface measurement system is the light splitter, through using the light splitter, mutual shielding between light sources can be avoided when a dual-light source positioning method is used, and thus no mechanical device movable light source is needed, and the speed bottleneck caused by a mechanical device is removed. In addition, two light sources adopt point light source arrays, which can achieve very high display density, and thus higher measurement precision can be achieved for a normal vector of the surface of the object to be tested. The dual-light source specular reflection surface measurement system is simple in structure, and can be widely applied to the field of automatic measurement of mirror surface reflection.

Description

technical field [0001] The invention is used in the field of object surface measurement, and in particular relates to a mirror reflection surface measurement system. Background technique [0002] Products with specular reflective surfaces are often produced in industrial production, such as smooth plastic surface, polished metal and injection molded / polished optical lenses, etc. For some of these products, precise measurement of the surface is required, for example, the smoothness of the decorative surface needs to be measured, and the surface curvature of the aspheric lens needs to be measured. The traditional three-dimensional measurement method is not suitable for such specular reflective surfaces because it requires the object to be measured to be a diffuse reflective surface. [0003] For specular reflective surfaces, the common measurement method is manual measurement. One is to observe components with high surface finish, such as decorative surfaces, with the naked ...

AI Technical Summary

Problems solved by technology

[0006] In order to avoid the occlusion of the light source in the measurement system using dual light sources, the existing technology needs to use mechanical equipment to move the light source, so the measurement speed is limited by the moving speed of the mechanical equipment

Compared with other parts of the measurement system, the moving speed of the mechanical system is very slow, which becomes a speed bottleneck; the measurement system using dual cameras has a large number of search processes, which increases the complexity; the method of using additional information is theoretically not complete. Algorithms are complex and therefore not suitable for industrial production processes

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