Bosch EX65 Instruction Manual download pdf (Page 26)

EX65 Explosion-protected Illuminator Glossary | en 27

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

CCD Format

Indicates the size of the camera sensor used. In general, the larger the sensor, the more

sensitive the camera and the better the image quality. The format is quoted in inches, for

example 1/3 or 1/2 inch.

Charged Coupled Device (CCD)

A CCD is a type of solid state image sensor used in CCTV cameras. The sensor converts light

energy into electrical signals.

Color Temperature

A measure of the relative color of illumination. Generally used to specify the color balance

correction of a camera to achieve a natural color image.

Day/Night (infrared sensitive)

A camera that has normal color operation in situations where there is sufficient illumination

(day conditions), but where the sensitivity can be increased when there is little light available

(night conditions). This is achieved by removing the infrared cut filter required for good color

rendition. The sensitivity can be further enhanced by integrating a number of fields to improve

the signal-to-noise ratio of the camera (this may introduce motion blur).

Default Shutter

A feature allowing the shutter speed to be set to a fast speed to eliminate motion blur and

provide a detailed and clear image of fast-moving objects while there is sufficient light. When

light levels fall and other adjustments have been exhausted, the shutter speed reverts to the

standard setting to maintain sensitivity.

Depth of Field

The distance from the nearest to the furthermost point that appears in focus. The smaller the

aperture, the greater the depth of field.

Dynamic Noise Reduction (DNR)

A digital video processing technique that measures the noise (image artifacts) in the picture

and automatically reduces it.

Electronic iris

Electronic iris (or AES - Automatic Electronic Shutter) adjusts the camera shutter speed to

compensate for lighting changes. In some cases this can eliminate the need for an autoiris

lens.

F-Number

The standard measure of the lens aperture, which is the iris diameter, divided by the focal

length of the lens. The lower the maximum aperture (F-Number or F-Stop), the more light that

passes through the lens.

F-Stop See F-Number

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Bosch EX65 Instruction Manual Page 26