Glossary

A

AC Adapter
Alternating Current Adapter; when plugged to AC Power (usually 117VAC/60Hz in the United States) it produces 12VDC, 24VAC or others. "UL Listed" and "Regulated" recommended. It is also called Power Transformer.

12VDC

Most board cameras, mini cameras and about one third of the professional cameras work with 12V DC 100mA to 200mA for B/W cameras and 150mA to 300mA for color ones.

Angle of View

The scene angle that a video camera lens can show on the monitor, like Diagonal Angle, Horizontal Angle and Vertical Angle, usually described in degree.

Focal Length (FL) is the distance from the center of a lens to the focal point (CCD sensor chip). FL, as well as the CCD chip's format, is the major factor to determine the angle of view of a lens. For example, a 6.0mm FL lens on

 1/3" sensor format has 56.8 degree 

of diagonal angle of view and a 5.0mm FL lens on 1/3" sensor format has 66.9 degree. But, the same 6.0mm FL lens can see 75.5 degree on 1/2" sensor format. The angle of view also varies a little depending on the Manufacturer of the lens.

B

Bandwidth

The number of hertz (cycles per second) showing the difference between the lower and upper frequencies of a frequency band video uses higher frequency than audio, thus requires a wider bandwidth.

Bandwidth
The number of hertz (cycles per second) showing the difference between the lower and upper frequencies of a frequency band video uses higher frequency than audio, thus requires a wider bandwidth.

BLC
Adjust the electrical shutter according to special area of measuring light. The exposal value will be normally in the measuring area.

C

CC-MOS
Complementary Metal -Oxide Semiconductor. A video image sensor chip that produces much lower quality picture than CCD chip.