The firmware such as CCD and CMOS is becoming more and more mature, the size of image sensitive devices is shrinking, the number of pixels and data rate are increasing, the speed of resolution and frame rate is changing with each passing day, the product range is becoming more and more rich, the parameters such as gain, shutter and signal-to-noise ratio are continuously optimized, and the core test indexes (MTF, distortion, signal-to-noise ratio, brightness of light source, uniformity, color temperature) are passed , comprehensive evaluation of system imaging ability, etc.) to make a comprehensive selection of light source, lens and camera, so that many difficult problems in previous imaging can be continuously broken through.<br>
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