Bosch EX65 Instruction Manual download pdf (Page 25)

26 en | Glossary EX65 Explosion-protected Illuminator

F.01U.162.949 | 1.0 | 2011.03 Instruction Manual Bosch Security Systems, Inc.

Glossary

AES

Automatic Electronic Shutter (see Electronic iris).

Aperture

The size of the opening in the lens iris that controls the amount of light reaching the CCD

Sensor. The larger the F-number, the less light reaches the sensor. An increase of one F-stop,

halves the amount of light reaching the sensor.

Auto Level Control (ALC)

The adjustment of the video level to give the desired brightness level. This can be done

electronically or by means of an iris control.

Auto White Balance (AWB)

A feature that allows a color camera to automatically adjust its output color to give a natural

color, independent of the lighting used.

AutoBlack

A technique of boosting the video signal level to produce a full amplitude video signal, even

when the scene contrast is less than full range (glare, fog, mist, etc.).

AutoIris

The lens iris opening is automatically adjusted to allow the correct illumination of the camera

sensor. With a direct drive (DC) iris lens, the camera controls the aperture size. A video iris

lens has the control circuit in the lens itself.

Automatic Gain Control (AGC)

The electronics that regulate the gain or amplification of the video signal. AGC is used in low-

light conditions with the iris fully open.

Back Light Compensation (BLC)

Selectively amplifies parts of the image to compensate for large contrast differences when

only a portion of the image is brightly lit (e.g. a person in a sunlit doorway). See also Smart

BLC.

Backfocus

The distance between the image plane and the rear portion of the lens. Correct backfocus

adjustment ensures that the camera remains in focus under various conditions.

Bilinx

A communications protocol that allows remote control, configuration, and updates to be

performed over the video cable (Coax or Passive UTP).

Bilinx address

The address may be set locally using the Bilinx Configuration Tool for Imaging Devices

(CTFID).

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Bosch EX65 Instruction Manual Page 25