Bosch 100 Series Довідковий посібник - Сторінка 43
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Footcandle
See sensitivity.
Image Size
Lenses are designed to produce an
image to fit the sensor being used.
Sensor sizes are related to the older
tube diameters, and normally quoted
in inches, 1/2", 1/3", 1/4" etc.
The sensor diagonal is dimension used.
Infra-red Illumination
Electromagnetic radiation with longer
wavelength than in the visible spectrum.
Illuminators can be lamps with
appropriate filters, LED's or IR laser
based. The longer the wavelength
the less sensitive the CCD sensor.
IP-rating
A two-digit number is used to provide
an IP Rating to a piece of electronic
equipment or to an enclosure for
electronic equipment.
The first digit represents protection
against ingress of solid objects(dust).
The second digit represents
protection against ingress of liquids.
IPS
An acronym for Images Per Second.
This is a measurement of the rate that
pictures are displayed to create a video
stream.
Camera Reference Guide
Joule
One joule is defined as the amount
of energy exerted when a force of one
Newton is applied over a displacement
of one meter.
Lens wizard
To set the (back) focus correctly the lens
iris should be fully open to give a narrow
depth of field. The lens wizard drives the
A/I lens fully open while maintaining
correct video level using the shutter.
Level Control
The adjustment of the video level to give
the desired brightness level. This can be
electronic or by means of the iris control.
Line Lock
Synchronises AC powered cameras
to the line voltage frequency.
Lux
See sensitivity.
Manual Iris Lens
A lens where the iris is manually
adjusted to open or close the aperture.
Megapixel
One million pixels. See pixel.
Monochrome
A black and white signal or picture.
MJPEG
Motion JPEG (M-JPEG) is a video codec
where each video field is separately
compressed into a JPEG image.
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