Phase retardation element and prism for use in an optical data s

Details Phase retardation element and prism for use in an optical data s Phase retardation element and prism for use in an optical data s

1983-10-13

1986-06-17

Corbin, John K.

350164, G02B 530, G02B 108

Patent

active

045952612

ABSTRACT:
A phase retardation element, for use in an optical data storage system, which provides a 90.degree. phase difference between two perpendicular polarized components of an incident wave with a single internal reflection from a surface coated with a thin film of dielectric or metal material.

REFERENCES:
patent: 2409407 (1946-10-01), Turner
patent: 3703330 (1972-11-01), Allen
patent: 4312570 (1982-01-01), Southwell
Southwell (2), "Multilayer High Reflective Coating Designs Achieving Broadband 90.degree. Phase Change", SPIE vol. 190, LASL Optics Conference, 1979, pp. 81-88.
Southwell (3) "Multilayer Coating Design Achieving a Broadband 90.degree. Phase Shift" Applied Optics, vol. 19, No. 16, 8-15-80, pp. 2688-2692.

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