Phase gratings of a combination pattern-refraction modification

Details Phase gratings of a combination pattern-refraction modification Phase gratings of a combination pattern-refraction modification

1986-10-21

1988-07-26

Wan, Gene

35016223, G02B 518

Patent

active

047596074

ABSTRACT:
A combination pattern-refraction modification type phase grating comprises dual grating elements which are regularly arranged and each includes convex and concave portions which have respectively different thickness and are formed of material respectively different in refractive index so as to combine respective characteristics of a pattern and a refraction modification type phase grating.

REFERENCES:
patent: 3911479 (1975-10-01), Sakurai
patent: 4568147 (1985-02-01), Seymour et al.
patent: 4598977 (1986-07-01), Kobayashi

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