Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1977-04-18
1978-10-31
McGraw, Vincent P.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356100, 356101, G01J 312
Patent
active
041231619
ABSTRACT:
Light is examined utilizing a wide slit and a dispersion means such as a prism to produce two pairs of diverging beams separated by an intermediate converging beam of white light. The light emerging from the dispersion means impinges upon a narrow slit situated between the dispersion means and a point at which the intermediate beam of white light converges. In a monochrometer, the first pair of diverging beams comprise red and yellow rays and emanate from one side of the dispersion means and the second pair of diverging beams comprises blue and violet rays and emanate from the other side of the dispersion means. A narrow slit located between the dispersion means and a point at which the intermediate white beam converges passes rays of a single color, either red, yellow, blue or violet, to a second dispersion means and light emerging from the second dispersion means impinges upon a means for measuring the dispersion of rays passing through the narrow slit with respect to a reference point. In the spectrometer, a narrow slit having a sufficient width to pass red and yellow rays while blocking blue and violet rays and vice versa is located between a dispersion means and a measuring means. The measured displacement of the rays provides a signature for the source of light illuminating the wide slit.
REFERENCES:
patent: 2813451 (1957-11-01), Stickney
patent: 3432238 (1969-03-01), Girard
patent: 3521960 (1970-07-01), Newcomer
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