Imaging principle and application of CMOS Preface: Introduction to CMOS market The image sensor of digital camera plays a vital role in the imaging effect, so it has always been a hot topic for digital people. Looking at the current market structure, it can be seen that consumer-grade DCs all use CCD, while almost half of professional-grade DSLRs use CMOS, which is of course also due to Canon, which has more than half of the market share. If we carefully observe the dynamics of major camera manufacturers nowadays, we can find that Canon and Kodak have been working hard on CMOS technology, Sigma has obtained the protection of X3 technology, and even Nikon has jointly developed a 10 million pixel CMOS chip with Sony this year. In addition, Fuji and Panasonic have also actively responded to the CMOS camp. Does this also imply some future market trend? So why is CMOS so popular in the DSLR field? This article will answer many seemingly complex questions for you. [pic]After using digital cameras for a long time, we know that the higher the pixel, the more photosensitive electrodes are integrated inside the image sensor. At the same time, we should also think that increasing the pixel will inevitably involve manufacturing costs. Every time the level is increased, the price of the digital camera will be higher. Moreover, after reaching a certain level, it is difficult for the CCD sensor to make a breakthrough in a short period of time due to the limitation of the manufacturing process. [pic]The CCD used in the current mainstream DSLR models is at most about 6 million. Even if Sony has produced 7 million and 8 million pixel CCDs, if you want to place it in the DSLR body, the final effect can only be contrary to the expected effect and unrealistic. However, the CMOS sensor has more than 16 million pixels. It is precisely because of this unique phenomenon that it is easy for consumers to have the view that the manufacturing cost of CMOS is cheaper than that of CCD. In fact, even if the two are compared at the same pixel level, CMOS is much higher than CCD in terms of its own manufacturing process cost and the total cost of peripheral circuit design. This is not as low-cost as some domestic media reports, otherwise consumer-grade DCs using CMOS sensors should have appeared in the market long ago. Next, let me learn more about the working principle of CMOS. P……
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