Device and method for testing colors of colored CCD chip

Abstract

The invention discloses a device for testing colors of a colored CCD chip. The device mainly solves the problem that an existing testing device can not accurately judge color quality of the colored CCD chip. The device comprises a xenon lamp light source, a monochrometer, an attenuator, an integrating sphere, a dark room, a Dewar bottle temperature control chamber, a drive control circuit and an upper computer. A colored CCD chip to be tested is placed in the Dewar bottle temperature control chamber and is connected with the drive control circuit. The monochrometer generates monochrome light and three-primary color light through irradiation of the xenon lamp light source and parameter adjustment, after the monochrome light and three-primary color light are converted to uniform face array light through the integrating sphere and the dark room, the light irradiates the colored CCD chip to be tested, and rgb brightness values of an image are obtained through the drive control circuit and the upper computer. The image is transferred to an L*a*b* space from an rgb space, and color quality of the colored CCD chip to be tested is judged according to the magnitude of the Euclidean distance between a point to be tested and a standard point in the L*a*b* space. The device has the advantages of being high in adaptability and stability, accurate in measurement of color brightness values, and capable of being used for quality selection of colored CCD chips.

Description

technical field [0001] The invention belongs to the field of optical measurement, in particular to a color testing device and method for a color CCD chip, which is used for evaluating the quality of the color CCD. Background technique [0002] Charge-coupled device CCD is a new type of semiconductor device developed in the early 1970s. It receives the light radiation energy reflected from the surface of the object or emitted by itself, and records the surface visual information of the object. As an important photoelectric detection element, CCD's various performance parameters determine the performance of the detection system to a large extent. Therefore, when developing a detection system, it is necessary to select a CCD chip with appropriate performance parameters. [0003] At present, CCD is mainly used in the following aspects in China. 1. Measurement testing, mainly including length measurement, thickness measurement, and level measurement. 2. Optical information proc...

AI Technical Summary

Problems solved by technology

The performance parameter indicators provided by color CCD manufacturers are only some basic parameters, such as responsivity, signal-to-noise ratio, dark current, etc., without mentioning color information, so it is impossible to evaluate the quality of color in CCD imaging. inconvenient to use

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