Economical fast scan spectrometer

Details Economical fast scan spectrometer Economical fast scan spectrometer

1979-02-23

1981-01-20

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356334, G01J 306, G01J 318

Patent

active

042459117

ABSTRACT:
A slow scan, frequency limited spectrometer having a screw mechanism for driving a rotatable grating is improved by incorporating and interlinking the following new constituent members with the screw mechanism: a cylindrical cam member with a groove and a constraint to attain a predetermined pitch, so that rapid scanning of a preselected wavelength range is achieved with the grating; a high torque, variable speed, direct current electric motor, so that the rapid scanning may be varied in speed; and, a liner potentiometer with a sliding contact, so that a remote wavelength readout of the variable rapid scanning can be obtained. Cylinder cam members of various pitches are also disclosed for use in scanning different wavelength ranges. At a low cost for improvements, the resulting spectrometer provides a variable fast scan, and is frequency selective.

REFERENCES:
patent: Re26053 (1966-07-01), Cary
patent: 3090863 (1963-05-01), McPherson
patent: 3414356 (1968-12-01), Cary
patent: 3433557 (1969-03-01), McPherson
patent: 3490848 (1970-01-01), McPherson
patent: 3627427 (1971-12-01), Johnson et al.
patent: 3822941 (1974-07-01), Roche et al.
patent: 4003657 (1977-01-01), Sovicka
patent: 4081673 (1978-03-01), Swindell et al.

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