InfraTec VarioCam Operating Instructions Manual page 10

Detector
®
VarioCAM has an uncooled microbolometer detector with 320 x 240 elements. The detector is thermally
stabilised with high-precision using Peltier element and is thus independent of the ambient temperature.
For the camera user, the use of an uncooled detector means quick availability of camera operation after
switching on and long operating life (MTTF) in continuous use.
Detector Electronics
The detector electronics provide the necessary bias currents and pulse frequencies for detector operation
and provide the pre-processing and digitalisation of the analogue video output signal of the detector.
Image Processing Electronics
Real-time image processing with the following essential functions (depending on the equipment) is
realised with the help of FPGA and embedded PC:
Detector electronics interface
Gain- and offset correction
Defective pixel treatment
Low-pass filtering
Zoom generator
Graphic overlay
IEEE1394 interface (isochronous)
Embedded PC interface
Standard format-video image generator (PAL/S-VHS)
Opto-mechanics
The following functions are realised with the help of the opto-mechanics assembly group:
Focussing (motor focus)
Effective range change-over (lens apertures)
Internal NUC (Non Uniformity Correction) using internal shutter
Furthermore, this assembly group has an optional module for increasing the camera's geometric
resolution (Resolution-Enhancement).
6 © InfraTec GmbH 2007
Operating Instruction for VarioCAM® head
3 Technical Description
Operating Instructions