Detector/Dewar Assembly.
The Detector/Dewar Assembly (Figure 2-18) is a multi-element detector
array contained in an insulating vacuum.
The insulating vacuum
assists in maintaining the necessary cryogenic temperature required
for efficient operation of the detectors.
The detector/Dewar is
optimized for low heat loss and long vacuum life.
The cooler
assembly coldfinger mechanically slipfits into the detector with a
small gap between the coldfinger and the detector array.
As
independent modules, the detector/Dewar and cooler assembly can be
separated
and
reassembled
for
test
and
replacement.
The
detector/Dewar contains the mercury cadmium telluride (HgCdte) IR
detector array, detector bias resistors, and the interconnecting
leads to the connector pins.
The connector permits external
connection of the detector/Dewar to the video preamplifier modules.
The detector consists of a monolithic 60-active-element linear array
of HgCdte photoconductive detectors and the detector bias resistors
to maintain the proper bias level of each detector.
Figure 2-18.
Detector/Dewar Assembly.
34
MM4812
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