Bolometer detector is one of thermal detectors. In this research the essential
concepts and parameters are included which cover the main types of bolometer
detectors. But the actual values of parameters used here in simulation are adopted
from  for semiconductor bolometer. This detector operates for all optical
wavelengths of different sources. From analysis and results obtained, it is shown
that minimum and maximum values of specific Detectivity D* for cryogenic
temperatures from 0.5 K to 10 K are 0.25~10 / and 5 ~
10 / , respectively and the values between them when the incident
radiation frequency is 100 Hz.. It is seen that for frequency greater than 1Hz, the
specific Detectivity increases rapidly which means that the bolometer detector will
respond for high frequencies in a manner more speed than that of low frequencies.
It is found that as the value of ƒÑth is increased, the temperature change in detector
sensor is decreased. That is decreasing ƒÑth enhance the performance of bolometer
detector. It is found that the responsivity of this detector follow its output voltage
which in turn follow the bolometer temperature change.