Miniature PbS sensor for NIR spectroscopy

Anthony S. Lee

doi:10.1117/12.370275

18 November 1999 Miniature PbS sensor for NIR spectroscopy

Anthony S. Lee

Proceedings Volume 3857, Chemical Microsensors and Applications II; (1999) https://doi.org/10.1117/12.370275
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

A new lead sulfide integrating detector assembly has been developed for applications in NIR spectroscopy in the 1 - 3 micron spectral region. The assembly contains a 128 element, thermoelectrically cooled, multiplexed detector array sensor, a driver control unit, and a software interface for signal digitization and processing. The system has selectable single scan integration times of 1 ms - 25 ms, and a signal-to-noise dynamic range of greater than 1,000 at 10 ms integration time. Dark referencing is used to control dark signal drift and to maintain pixel-to-pixel offset uniformity to within 1%. The PbS detector assembly has been interfaced with an optical fiber, a dispersion grating, and a laptop computer, to produce a compact 1 - 3 micron spectrophotometer with a per pixel resolution of 12 nanometer.

Citation Download Citation

Anthony S. Lee "Miniature PbS sensor for NIR spectroscopy", Proc. SPIE 3857, Chemical Microsensors and Applications II, (18 November 1999); https://doi.org/10.1117/12.370275

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