Bichromatic spectrophotometer with wavelength reversal

Details Bichromatic spectrophotometer with wavelength reversal Bichromatic spectrophotometer with wavelength reversal

1980-07-07

1982-07-20

Evans, F. L.

Optics: measuring and testing

By shade or color

With color transmitting filter

250565, 356220, G01J 350, G01N 2131

Patent

active

043403077

ABSTRACT:
An improved bichromatic or polychromatic spectrophotometer comprising means enabling the user to electronically select which wavelength of a preselected pair of wavelengths shall serve as a "sample" wavelength, with the other then serving as a "reference" wavelength.

REFERENCES:
patent: 3089382 (1963-05-01), Hecht et al.
patent: 3519816 (1970-07-01), Bartz et al.
patent: 3583813 (1971-06-01), Shibata et al.
patent: 3665215 (1972-05-01), Boronkay
patent: 3689158 (1972-09-01), Shifrin
patent: 3690772 (1972-09-01), Endl
patent: 3706497 (1972-12-01), Lindberg
patent: 4090789 (1978-05-01), Macemon et al.
patent: 4136959 (1979-01-01), Honkawa et al.

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