Spatially homogenizing optical modulator

Details Spatially homogenizing optical modulator Spatially homogenizing optical modulator

1979-06-25

1981-08-11

Corbin, John K.

Optics: measuring and testing

Refraction testing

Differential

G01N 2141

Patent

active

042831407

ABSTRACT:
Apparatus of the type including a light source directing a light beam through a measurement zone to a detector, wherein movement of the beam in a measurement direction with respect to the detector gives an indication of the measurement made in the zone, the improvement wherein the position of the beam with respect to the measurement zone is modulated through a preselected amplitude in a modulation direction, the amplitude being independent of light beam movements at the light source or in the path of the beam between the source and the modulating means, whereby the measurement can be made substantially independent of the beam movements in the modulating direction.

REFERENCES:
patent: 2047244 (1936-07-01), Altman
patent: 2612814 (1952-10-01), Glasser
patent: 2972926 (1961-02-01), Goldberg et al.
patent: 3386332 (1968-06-01), Watson
patent: 3520620 (1970-07-01), Broerman
patent: 3999856 (1976-12-01), Unterleitner
patent: 3999857 (1976-12-01), David et al.
patent: 4122337 (1978-10-01), Oruda et al.
Nelson, J. R., Speech "The Hot One", The Waters Approach to "Hi Speed-Hi Temp. GPC/LC Analysis", GPC Symposium-Nov. 8, 1977.

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