This characteristic means that they can be read faster and that the image area can be accessed in more flexible ways. Because there is one common electronic path for a large fraction, if not for all of the pixels in a CCD chip, all analog pixel signals are evaluated and processed in the same way, and they are all converted to digital signals in the same way.ĬMOS chips carry individual processing electronics on board each pixel and are different in this respect. However, it is an advantage for image quality. ![]() The Price of Individuality One set of electronics for all pixels-this phrase regarding processing capability is valid for CCD sensors and at first sight-sounds rather like a trade-off. The lens array collects the light impinging on each pixel area in sensor and focuses it on the available light sensitive region within the pixel. One example of such an improvement is the micro-lens array that is now applied to the CMOS chip. Over the past few years, design improvements have increased the size of the light sensitive area of CMOS sensors to near the level of CCD sensors. In CCDs, the electronics for the evaluation of the charges collected by the sensor surface is located outside of the chip, so almost the entire chip surface is available for photosensitive structures. ![]() The structure of CCD sensors is different.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |