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Overview of Detectors for Oriel MIR8025TM FT Spectrometers
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Fig. 1 Normalized spectrum of blackbody radiation @ 1273 K, recorded with MIR 8025 and Near Infrared Detectors.
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Fig. 2 Normalized spectrum of blackbody radiation @1273 K, recorded with MIR 8025 Scanner and Detectors under non-purged operating conditions. Spectra show atmospheric absorption of water and carbon dioxide.
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Table 1 MIR 8025TM Detectors
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| Model |
Detector Type |
Responsivity Range |
Detector Element Size |
Optic Used |
Preferred Beam Splitter |
Cooled |
Typical D*
(cm Hz1/2 W-1) |
Test Conditions*** |
Irradiance
(Wcm-2) |
Gain |
Modulation
(Hz) |
RMS Voltage |
| 80019 |
Si |
14,000 - 10,000 cm-1
(0.7 - 1 mm) |
1 mm diameter |
F/0.68, 31 mm f, Pyrex® Asphere |
CaF2 |
|
1 x 1014 |
1 x 10-4 |
1 x 107 |
150 |
6 x 10-3 |
| 80020 |
InGaAs |
10,000 - 6,000 cm-1
(1 - 1.7 mm) |
1 mm diameter |
F/0.68, 31 mm f, Pyrex® Asphere |
CaF2 |
|
1 x 1012 |
1 x 10-4 |
1 x 106 |
150 |
7 x 10-2 |
| 80014 |
Extended InGaAs |
8,000 - 4,000 cm-1
(1.2 - 2.5 mm) |
1 mm diameter |
F/0.68, 31 mm f, Pyrex® Asphere |
CaF2 |
X (TE)* |
1 x 1012 |
1 x 10-4 |
1 x 106 |
150 |
0.18 |
| 80021 |
InSb |
10,000 - 2,000 cm-1
(1 - 5 mm) |
2 x 2 mm |
F/2, 75 mm f, CaF2 |
CaF2 |
X (Liquid N2) |
3 x 1011 |
1 x 10-4 |
2.5 x 104 A/V |
500 |
7 x 10-2 |
| 80015** |
HgCdZnTe |
3,550 - 1,700 cm-1
(2.8 - 6 mm) |
1 x 1 mm |
F/2, 75 mm f, CaF2 |
CaF2 |
X (TE) |
1.2 x 1010 |
1 x 10-4 |
Fixed*** |
500 |
5 x 10-2 |
| 80008 |
DTGS |
6,000 - 350 cm-1
(1.7 - 28 mm) |
1 x 1 mm |
Parabolic Off-Axis |
KBr |
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1.5 x 109 to 3.5 x 109 |
1 x 10-4 |
Fixed*** |
500 |
1.8 x 10-2 |
| 80026 |
MCT |
5,000 - 600 cm-1
(2 - 17 mm) |
1 x 1 mm |
Parabolic Off-Axis |
KBr |
X (Liquid N2) |
5 x 1010 |
1 x 10-4 |
High, 2nd stage***** |
150 |
1.6 x 10-2 |
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* Requires 77055 (Specify Mains Voltage at time of order) TE Cooling Controller
** For 110 V only; order 80016 for 220 V operation.
*** Data was obtained with true RMS meter. Blackbody radiation was modulated with a mechanical chopper and the bare detector element was irradiated by a known radiation flux originating from a blackbody at 1273 K; no optics were used.
****The detector gain is optimized for the 80007 Source; fine gain and adjustments can be performed with the internal potentiometer.
*****The detector has two stages of amplification with three possible selections; LOW, MED and HIGH. The second stage provides AC coupling and x 10 amplification.
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Fig. 3 Dimensional diagram of MIR 8025™ Detectors.
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