Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1991-09-24
1992-12-15
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
356244, G01N 2101
Patent
active
051719959
ABSTRACT:
A sample holder for placing a sample substance for transmission measurements with optical radiation into a spectrometer, in particular, a FTIR spectrometer which is at least partially made from a material transparent to the optical radiation in a intermeshing wavelength region and which exhibits an index of refraction in excess of 1 is configured as a converging lens with a concave surface (11) and a convex surface (12). To take an absorption spectrum of a powder and/or fluid dissolved or suspended sample substance, the sample substance is brought onto the concave surface (11) of the sample holder before the measurement where it, in consequence of the curvature and in contrast to a flat surface, is concentrated in a substantially smaller surface region. The configuration of the sample holder as a converging lens increases the yield of the radiation penetrating through the sample substance onto the detector of the spectrometer configuration.
REFERENCES:
patent: 4619530 (1986-10-01), Meserol et al.
patent: 4673289 (1987-06-01), Gaucher
patent: 4956150 (1990-09-01), Henry
Gast Jurgen
Reh Eckhard
Simon Arno
Bruker Analytische MeBtechnik GmbH
Fields Carolyn E.
Hackler Walter A.
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