Cmos versus CCD

Today, most digital still cameras use either a CCD image sensor or a CMOS sensor. Both types of sensor accomplish the same task of capturing light and converting it into electrical signals.

CCD sensor

How it works: Each cell of a CCD image sensor is actually an analog device. When light strikes the chip it is held as a small electrical charge in each photo sensor. One pixel at a time, the charges are converted to voltage as they are read from the chip. Additional circuitry in the camera converts the voltage into digital information.

CMOS sensor

How it works: A CMOS imaging chip is a type of active pixel sensor made using the CMOS semiconductor process. Extra circuitry next to each photo sensor converts the light energy to a voltage. Additional circuitry on the chip may be included to convert the voltage to digital data.

Advantages or disadvantages

There is no consensus yet which is the best technology or which has a clear advantage in image quality. On one hand, CCD sensors are more susceptible to vertical smear from bright light sources when overloading the sensor; high-end CMOS sensors in turn do not suffer from this problem. On the other hand, cheaper CMOS sensors are susceptible to undesired effects that come as a result of rolling shutter.

Watec CMOS camera module

Currently Watec offers an Full HD camera module at 30 frames per second. Which is a plug and play solution. The WAT-01U2 is recently released and is USB compatible. It fits into the line of upcoming new camera's which are even more compact and more easy to use and install.

Go to WATEC 1000