Light source device, surface defect detection method and device

Abstract

The invention relates to a light source device, a surface defect detection method and a device. The light source device includes: a bottom plate with a light outlet; a spherical shell with a hemispherical outline, which is buckled on the bottom plate and encloses with the bottom plate to form a hemispherical cavity; on the spherical shell opposite to the light outlet The position is provided with an observation window; the inner wall of the spherical shell is coated with a diffuse reflection coating; the light source is arranged at a predetermined position on the bottom plate to provide light; the light is diffusely reflected by the diffuse reflection coating and then emitted from the The mouth is emitted to the outside of the cavity to form uniform irradiation light; the reflection-transmission mirror is arranged in the cavity and is blocked between the light outlet and the observation window, so that the light on both sides of the reflection-transmission mirror is directed to the In the case of reflective-transmissive mirrors, part of the light is transmitted and part of the light is reflected. The above light source device, surface defect detection device and method can avoid seeing the image of the camera when performing defect detection, and the scratches on the surface of the object and the background can also be distinguished.

Description

technical field [0001] The invention relates to the technical field of machine vision light sources, in particular to a light source device, a method and a device for detecting surface defects. Background technique [0002] In the application of machine vision, the field of detection, especially defect detection, has always been a difficult research point. Among them, the detection of smooth specular objects is the most difficult point, and the main difficulty is focused on lighting. In the actual application process of machine vision, lighting is the first step in the operation, and it is also a very critical step, which often determines the complexity of the subsequent processing algorithm and the success or failure of the entire solution. [0003] At present, the processing level is getting more and more exquisite, more products have smooth surface and streamlined shape, and the demand for smooth specular reflection surface inspection is also increasing. Therefore, it i...

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Problems solved by technology

[0005] Based on this, it is necessary to provide a light source device, a surface defect detection method and a device for the problem that when the traditional light source provides light, it is difficult to distinguish the scratch from the background or leave the image of the camera.

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