This figure shows the sensitivity of the pyroelectric detectors normalized with
the sensitivity at 1 THz. Between 200 and 500 µm the sensitivity changes within 2 %.
THz - Trap - Detector
Trap
孔径
20 mm
thermal time constant
50 ms
max. power
50 mW
typ. current sensitivity
0.5 .. 1 µA/W
rise time*
< 2 ms
chopper rate
8 - 50 Hz
* only the detector
Total reflectivity (loss) for a 3 element trap, left modelled
and right calculated from measured data for one detector.
最小可探测功率和最大的遮光频率取决于放大器和探测器的参数:
Bandwidth of the Amplifier
min. detectable power
max. chopper frequency
17 Hz
15 µW
10 Hz
40 Hz
25 µW
25 Hz
70 Hz
100 µW
50 Hz
Current-Preamplifier CPA（放大器）
结合探测器和前置放大器的灵敏度是由乘法当前探测器的灵敏度和电流放大器的放大(例如探测器10- 6A / W和CPA 109V /A导致总灵敏度:10-6A / W * 109 V / A = 1000 V/ W)。放大设置可以通过一个开关。
