Spectrophotometer

Details Spectrophotometer Spectrophotometer

1982-03-02

1984-08-07

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrophotometer

G01J 308, G01J 342

Patent

active

044640510

ABSTRACT:
Disclosed herein is a spectrophotometer which includes a source of radiation; an optical system for forming a beam of radiation from the source and directing it along a sample path and along a reference path, which paths come together at a location to form a combined path that impinges on a detector; a chopper mounted at said location for successively directing one or the other of the beams along the combined path or providing a blank chopper area for blocking radiation from the combined path; a monochromator having a grating and slits disposed in the combined path, the angular position of the grating being adjustable for passing selected successive wavelengths of radiant energy through the optical system; and controls are provided for controlling the movement of the grating and/or slits so that movement only occurs when the blank chopper area is blocking the combined path.

REFERENCES:
patent: 2879393 (1959-03-01), Cary et al.
patent: 3462227 (1969-08-01), Tipotsch
patent: 3542480 (1970-11-01), Ford
patent: 4121145 (1978-10-01), Talmadge
patent: 4305663 (1981-12-01), Perkins et al.

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