Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1996-01-23
1997-02-18
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01J 302, G01J 336
Patent
active
056045891
ABSTRACT:
A diode array spectrophotometer has an entrance slit apparatus, a diffraction grating, a diode array and a casing to define the relative positions of the elements. The casing and the holder for accepting the diffraction grating are made of a ceramic whose coefficient of thermal expansion is matched to that of the diode array. The grating holder has a cylindrical outer surface and is situated within a conic-frustum-shaped opening of the casing. Between the grating holder and the conic-frustum-shaped opening, there are a plurality of filler elements which are made of ceramic or glass.
REFERENCES:
patent: 4644632 (1987-02-01), Machler et al.
patent: 4709989 (1987-12-01), Machler
patent: 5162868 (1992-11-01), Ando
Zeiss, H. Schlemmer et al., Jun. 1984, "Simultan-Spektrometer" (pp. 1-15) (in German).
Evans F. L.
Hewlett--Packard Company
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