Image sensors and optical devices

Which image sensor is mainly used in current smartphone cameras?

  1. ACamera tube
  2. BCCD image sensor
  3. CCMOS image sensor
Show answer and explanation

Answer: C. CMOS image sensor

Smartphone cameras use CMOS image sensors, which can be made in the same CMOS process as logic, consume little power and integrate readout circuits and AD converters on the same chip. CCDs were once mainstream in digital cameras but are now limited to special applications.

  • A. Camera tubes were vacuum-tube imaging devices used in old television cameras.
  • B. CCDs are now limited to special applications.
  • C. Correct. CMOS image sensors are mainstream.
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More Image sensors and optical devices questions

  1. When the light falling on a reverse-biased photodiode becomes stronger, how does the current (photocurrent) change?
  2. Why do images taken in dark places look grainy (with conspicuous noise)?
  3. Which correctly describes the "conversion gain" of a CMOS image sensor?
  4. What is the main advantage of the scheme used in many CMOS image sensors in which each pixel column has its own AD converter for parallel conversion?
  5. Which correctly describes "pixel binning" in image sensors?