Anti-reflection coating having pseudo-inhomogeneous layers

Details Anti-reflection coating having pseudo-inhomogeneous layers Anti-reflection coating having pseudo-inhomogeneous layers

1975-06-05

1976-06-01

Stern, Ronald J.

G02B 528

Patent

active

039604411

ABSTRACT:
A coating for reducing unwanted reflection off a surface of a substrate. The coating is made up of an inner layer, and outer layer subsequently deposited in that order from the substrate, at least one of these layers being an inhomogeneous layer having a moderate distribution of refractive index in the direction of thickness. Desired different gradients of the refractive index distribution are effected by the superposition of sublayers of materials having a high index of refraction and a low index of refraction deposited by vacuum evaporation one upon the other and having different combinations of thicknesses thereof.

REFERENCES:
patent: 3235397 (1966-02-01), Millendorfer
patent: 3737210 (1973-06-01), Howe
patent: 3761160 (1973-09-01), Apfel et al.

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