Imaging ATR spectrometer

Details Imaging ATR spectrometer Imaging ATR spectrometer

1998-07-15

2000-10-31

Evans, F. L.

Optics: measuring and testing

By particle light scattering

With photocell detection

356300, 356326, 25033911, G01J 345

Patent

active

061411000

ABSTRACT:
Method and apparatus for providing an imaging attenuated total reflection (ATR) spectrometer which provides faster measurement speed and better spatial resolution than systems collecting an equivalent amount of data using conventional, non-imaging ATR methods and systems. Apparatus includes a radiation source, an interferometer coupled to the radiation source which produces a spectrally-multiplexed input beam of radiation, an internal reflection element (IRE) engaging a sample-under-test, a focal plane array detector, a first optical system adapted and positioned to direct and concentrate the input beam through the rear surface of the IRE towards a contact area of the sample such that an angle of incidence of said input beam at the front surface is equal to or greater than the critical angle for the IRE, and a second optical system adapted and positioned to collect reflected radiation from the contact area and image the same onto the focal plane array detector.

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