Project Title:

A Rugged, Compact, Near-Infrared Reflectance Spectrometer

92-1-08.21-0610                                                    NAS07-1230
A Rugged, Compact, Near-Infrared Reflectance
     Spectrometer
Sensors Unlimited, Inc.
3490 U.S. Route 1
Princeton, NJ  08540
Marshall J. Cohen                                    (609-520-0610)

Abstract:

     A compact, low-power, near-infrared reflectance spectrometer
will be developed for use in spacecraft missions. The innovation
consists of integrating a custom-designed, dielectric stack
"wedge-filter" with a low-noise, room-temperature InGaAs
photodiode array. In Phase I, a prototype system for the 0.9 to
1.7 æm wavelength band will be built and delivered. In Phase II, a
complete system for 0.9 to 2.5 æm, including all hardware and
associated electronics, will be built and delivered. 

Potential Commercial Application:

Potential Commercial Applications:  This spectrometer will have
such terrestrial industrial applications as the determination of
the water content of grains and food products, the on-line
measurement of the octane rating of gasoline, the measurement of
the alcohol content of beverages, and the control of coating
processes. 

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