Quote:
Originally Posted by jase
Not wanting to change the purpose of this thread, but I disagree with your comment Arthur.
"each pixel on a CMOS sensor has several transistors located next to it, the light sensitivity of a CMOS chip tends to be lower. Many of the photons hitting the chip hit the transistors instead of the photodiode."
http://electronics.howstuffworks.com/question362.htm
This implies that you need longer exposure times to compensate for the lack of sensitivity, this in turn increases the noise (as you mentioned). Both noise and sensitivity can be controlled through cooling and pixel binning respectively. |
So then, what about the switching noise from "several transistors" next to each pixel? Not to mention the heat generated by having those on the chip as well? Add to that the significant increase in physical chip size and consequent increase in TEC size and current requirements? Pixel binning should also be an option, not a requirement surely?
arthur