Optical system for synthesizing plural light beams

Details Optical system for synthesizing plural light beams Optical system for synthesizing plural light beams

1982-12-30

1985-10-08

Punter, William H.

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350174, 369 54, 369110, G02B 530, G02B 2710

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045456518

ABSTRACT:
In an optical system for synthesizing a plurality of light beams, a first light beam of parallel light rays emitted from a laser beam source is incident on an inclined face of a right angle prism through the prism. A second light beam of parallel light rays emitted from a laser beam source is incident to the inclined face at a predetermined angle of incidence. The first light beam is emitted to the inclined face at an angle of incidence equal to a critical angle so that the first light beam is totally inflected by the inclined face and transmitted in a predetermined direction. The second light beam is refracted at an angle of refraction substantially equal to the Brewster's angle, and then transmitted in a direction which defines a predetermined angular difference with the predetermined direction of the first light beam. A multi-layered film is formed on the inclined face. The film makes the angle of refraction of the second light beam approach the critical angle, so as to reduce the angular difference from that which would exist in the absence of the film.

REFERENCES:
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patent: 4128308 (1978-12-01), McNaney
"Einfuhrung in die Theoretische Physik" (Introduction to Theoretical Physics) Schaefer, vol. 3, part 1, 1932, Walter de Gruyter & Co., p. 398 bottom.
Analysis and Discussion thereof as Reflected in an Interview Record in the German Patent Office (along with the English translation of the Interview Record).
Sincerbox, G. T., "Laser Beam Combining", IBM Tech. Disc. Bull., 3-1970, pp. 1663-1664.
Krylova, T. N., "The Reflection of Light from a Coated Surface at Various Angles of Incidence", Sov. Jr. of Opt. Tech., 11, 12-1968, pp. 695-698.
Minkov, I. M., "Reflectance of a Single-Layer Dielectric Coating for Light Incident at an Angle Equal to or larger than the Critical Angle for Total Reflection," Optics & Spectroscopy, 11-1966, pp. 344-346.
Mannigel, T., "Prismatic Beam Expansion" Optical Eng. 7/8-74.

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