Dual fiber optic spectrophotometer

Details Dual fiber optic spectrophotometer Dual fiber optic spectrophotometer

1989-01-04

1993-02-02

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrophotometer

359230, 356328, G01J 308, G01J 342, G02B 2602

Patent

active

051841932

ABSTRACT:
Spectrophotometric apparatus and methodology suitable for continuous and long-term use. The apparatus includes a monochromator providing pre-dispersed monochromatic light to the optical inputs of a pair of fiber optic cables and a translator for alternatively positioning the fiber optic cables at the same location with respect to the monochromator output. One of the cables conducts light to a sample under study while the other cable provides a reference for light intensity measurements. The methodology includes the steps of performing two scans through the monochromator output for each measurement on the sample. The fiber optic cables are moved between scans so that the cable employed in the latter scan occupies the former position of the cable employed in prior scan.

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patent: 4664522 (1987-05-01), LeFebre
patent: 4685801 (1987-08-01), Minekane
patent: 4696570 (1987-09-01), Joliot et al.
patent: 4786171 (1988-11-01), LeFebre et al.
Nassimbene "Light Shutter" IBM Tech. Disc. Bulletin, vol. 7 #1, Jun. 1964, p. 70.

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