Diffused light source structure for scanning of linear CCD sensor and assembling method thereof

Abstract

The invention discloses a diffused light source structure for scanning of a linear CCD sensor and an assembling method thereof, and relates to the technical field of object surface detection. The diffused light source structure comprises a lampshade, a power supply circuit board being arranged on the top surface of the lampshade, and a power connection contact pin being arranged on the top surfaceof the power supply circuit board; a scanning channel which penetrates through the power supply circuit board and the lampshade from top to bottom; illuminating parts which are obliquely arranged onthe bottom surface of the lampshade; a control circuit board which is arranged at the end part of the lampshade; and a plurality of MOS tubes which are connected to one side surface of the control circuit board. A first cooling fin provided by the invention can receive most of heat generated by the MOS tubes, and a heat insulation sheet above the first cooling fin can effectively prevent the heatfrom being transmitted upwards, so that adverse effects caused by heating of a second part of the control circuit board are avoided, and the service life of the control circuit board is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of object surface detection, in particular to a diffuse light source structure for linear CCD sensor scanning and an assembly method thereof. Background technique [0002] CCD sensor, made of a high-sensitivity semiconductor material, can convert light into electric charge, and convert it into digital signal through analog-to-digital converter for computer to process it. At present, it has been widely used in the detection of surface defects of industrial products. Especially for the detection of various defects on the product surface. [0003] In the detection process of product surface defects (with high precision requirements), the sampling environment is very important, and reliable and high-precision data must be provided for the subsequent image processing process to obtain accurate defect detection results. [0004] At present, during the scanning sampling process of the CCD sensor, the brightness a...

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Problems solved by technology

[0005] At present, most of the lighting sources are LED lighting sources. If the brightness of the lighting is increased, it will be greatly limited by the heat dissipation of the LED lighting source. The heat dissipation is very inappropriate and inconvenient to install. Moreover, the shaking during the working process, due to the large weight and inertia of the LED lighting source (equipped with heat dissipation), will affect the stability of the light source, and the vibration will also affect the scanning and sampling of the CCD sensor. Accuracy

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