Catalogs >
MICRO-CONTROLE / Spectra-Physics >
PbS and PbSe Detectors for Oriel Merlin™ Radiometry System

PbS and PbSe Detectors for Oriel Merlin™ Radiometry System
1Pages

Catalog excerpts

PbS and PbSe Detectors for Oriel Merlin™ Radiometry System - 1

S p e c t r o s c o p y I n s t r u m e n t s 1229 Email: sales@newport.com • Web: newport.com MONOCHROMATORS AND SPECTROGRAPHS SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS AND CCD CAMERAS FT-IR SPECTROMETERS ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS PbS and PbSe Detectors for Oriel Merlin™ Radiometry System PbS and PbSe Detectors These are classical photoconductive infrared detectors. PbS has a relatively high detectivity; PbSe extends the responsivity farther into the infrared. As with all infrared detectors, they benefit significantly from operating at lower temperatures. PbS and PbSe detectors are subject to 1/f noise due to bias current. We offer them for AC operation only. PbS @ 289K PbSe @ 298K PbSe @ 243K PbS @ 243K NOISE EQUIVALENT POWER (W Hz )-1/2 10-9 10-10 10-11 10-12 1000 2000 3000 4000 5000 6000 Fig. 1 NEP values of PbS and PbSe detectors. RELATIVE RESPONSIVITY WAVELENGTH (ìm) 70343 70341 70344 70345 1.0 0.8 0.6 0.4 0.2 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Fig. 2 Relative responsivities of PbS and PbSe detectors. Stability Good stability of response is obtained with the TE cooled and stabilized detectors. Room temperature units show the usual drift with changing ambient conditions. Both PbS and PbSe are subject to a change of responsivity when exposed to blue to UV light. They usually recover but it may take days of dark storage before full recovery occurs. These detectors require a bias voltage; a 100 V bias supply is built into the detector housings. Measurable Power The NEP plot (Fig. 1) shows the typical minimum measurable power levels of our PbS and PbSe detectors. You will need an attenuator to measure power levels above approximately 0.1 mW. Single Point Responsivity We provide a single point responsivity, at 2.5 ìm, for all of our lead salt detectors. Use these factors with confidence for the cooled detectors; use them for guidance with the room temperature units. Use the typical responsivity curves (Fig. 2) to approximate responsivity at other wavelengths. Detector Systems All PbS and PbSe detector packages for Merlin™ include: • Detector element • Detector housing with built-in bias supply and preamplifier • All necessary interconnecting cables You will also need to order: • 77055 Cooler Controller for the cooled systems (described on page 1242) • Merlin™ Control Unit • Chopper • Excellent detectors for the NIR • Room temperature and TE cooled models Ordering Information Model Detector Type Wavelength Range Detector Active area Temperature 70341 PbS 0.7 to 3 microns 1 x 3 mm TE Cooled 70343 PbS 0.7 to 3 microns 3 x 3 mm Room Temperature 70344 PbSe 1 to 5 microns 1 x 3 mm TE Cooled 70345 PbSe 1 to 5 microns 3 x 3 mm Room Temperature

Open the catalog to page 1