Optical attachment for variable angle reflection spectroscopy

Optics: measuring and testing – Of light reflection

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356244, G01N 2101

Patent

active

050489704

ABSTRACT:
A vaariable angle reflection accessory for use in reflection spectrometry characterized by a pair of fixed ellipsoidal reflectors positioned over the sample surface and a pair of rotatable plane mirrors positions at opposite sides of the sample surface. The spectrometer beam is brought to a focus at the first plane mirror, from which it is reflected off the first ellipsoidal reflector to a focus at the sample surface. The reflected beam follows a corresponding path back to the spectrometer. Rotating the mirrors in unison causes the beam angle of incidence on the sample surface to vary over a wide range while maintaining optical alignments and continuing to center the radiation on the same sample area.

REFERENCES:
patent: 4473295 (1984-09-01), Doyle
patent: 4479058 (1984-10-01), Gast et al.
patent: 4657390 (1987-04-01), Doyle
patent: 4692024 (1987-09-01), Bloss
patent: 4853542 (1989-08-01), Milosevic et al.
Brimmer et al., "Angular Dependence of Diffuse Reflectance Infrared Spectra. Part I: FT-IR Spectrogoniophotometer", Applied Spectroscopy, vol. 40, #2, 1986, pp. 258-265.
Harrick Scientific Co., "Reflection Attachment", Applied Spectroscopy, vol. 44, #2, 2/90, p. 36a.

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