Sabtu, 29 Desember 2012

Did you know about your images sensor?(CMOS)

This time i will explain one kind of images sensor,yes it is CMOS.You already know,there's 2 kind of images sensor that usually used,CCD and CMOS.
Both CCD and CMOS sensors, both long enough although initially developed CMOS quality is less than the CCD. Then it's CCD initially preferred for use in digital cameras while CMOS is only intended for use in a camera gadget. Gradually, the research has been successful in improving the quality of CMOS sensors in hopes could match the quality of a CCD sensor. CCD sensor itself is now just beginning to be developed for a camera gadget, otherwise an increasingly refined CMOS sensor was implemented in digital cameras. A cross marks the difference was no longer significant in terms of image quality between the two. Now in DSLR cameras and upper middle class are now using CMOS sensors, while still using CCD DSLR economical. Most of the non-DSLR cameras still use CCD sensors.
practical sensor chip includes ADC circuit (camera on a chip)
The advantages of this sensor are :
  1.      thanks to power-saving integrated system
  2.      responsive processes speeds (thanks parralel readout structure)
  3.      each pixel has its own transistor thus avoid the problem of smearing or blooming
The advantages of this sensor are :

  1. technology maturation process (to match the quality of the CCD need to be expensive)
  2. pixels with a transistor in it lowers the sensitivity of pixels (light receiving area is reduced) 
  3. pixel is able to issue its own voltage poor performance in terms of uniformity (uniformity)  

 

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