The Study Of CMOS Camera Photoelectric Response Characteristic Based CMV300

With the continuous development of CMOS image sensor technology and improvement of manufacturing process, CMOS image sensor with its own unique characteristics of high integration, low power consumption, low cost, strong ability to resist infection, becomes more and more popular in civilian areas. Moreover, in the field of scientific application, the proportion that CMOS image sensor takes is becoming more and more big. Therefore, CMOS image sensor as the photosensitive device of target detection system, is becoming more and more popular. As for photoelectric detection system, we care about most is the detection ability under various states. The detection ability of photoelectric system is decided by many factors together. However, the factors that photoelectric detection system designers can control mainly have two: one is the detecting ability limit of optical system; the other is the detection target standard of the photosensitive device. Hence one can see that the photoelectric detection ability of CMOS image sensor directly controls the detection ability of photoelectric detection system. So, it is necessary to discuss the impact of CMOS image sensor as the detector photosensitive device on the detection ability of detection system. Because the CMOS image sensor adopts standard CMOS LSI manufacturing technology, it still have high noise and relatively low light response ability. These two characteristics are lethal to the detection capability of detection system. So, in order to improve the detection capability of the photoelectric detection system, we need to study the noise level and the optical response ability of CMOS camera respectively.The noise of the CMOS and the influence of photosensibilityon detection ability of detection system are discussed in this paper, while CMOS image sensor is regarded as the photosensitive device of space target detection system. First of all, the noise of CMOS image sensor is analyzed, and the noise of CMOS image sensor system is measured. Then, we can get that CMOS image sensor has a strong response heterogeneity by analysis. After that, nonuniformity correction algorithm is discussed, and an improved two-point correction algorithmis proposed according to the characteristics of the CMOS image sensor. Then, the image collected by the CMV300 CMOS image sensor is corrected by the algorithm, the corrective effect of which has obvious advantages over general correction algorithms. Finally, theoretical analysis and experimental research are carried on the efficiency of CMOS image sensor micro lens array, which are closely related to the detection capability of detection system. The experimental results point out that the efficiency of micro lens array will fall significantly with oblique incidence light, and it will fall more obvious with shorter wavelength. But it would be lucky that the response of the CMOS image sensor falls only about 20%, when the incident angle is less than 10 degrees.