Spectrometers Based on 2D Array Detectors

The first true mid-infrared imaging microspectrometer was reported by Levin s group at NIH and Marcott s group at Procter and Gamble [60]. They used a 

Spectral resolution 2-8 cm Spatial resolution 8 pm Collection time 100 sto 2 h 

A short time later, Levin s group modified their system to operate with a mid-IR MCT FPA detector. Unlike most MCT detectors used in FT-IR spectrometers, which operate in the PC mode, the pixels of MCT FPA detectors operate in the photovoltaic (PV) mode. As noted in Section 1.2.2, the cutoff wavenumber of narrow-band MCT PC detectors is at about 750 cm . The PV detector elements used in MCT FPA detectors have the same high sensitivity as narrow-band MCT PC detectors but the cutoff wavenumber is higher at about 850 cm .  

The first commercial instrument employing the concepts developed by the Levin group was designed by Bio-Rad and marketed as the Stingray in 1995. 

BiO Rad sold the company to a group of private investors, who renamed the company D lab LLC. The group sold D ilab to Varian in 2004 and was later acquired by. ilent. During each of these manifestations, this organization made many of the innovations that have led to the remarkable popularity of FT-IR spectroscopy today. In this chapter, the name of the company will be given as it was when the work was reported. 

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