Anti reflection coating with a composite middle layer

Details Anti reflection coating with a composite middle layer Anti reflection coating with a composite middle layer

1977-04-22

1978-12-05

Stern, Ronald J.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427165, G02B 528

Patent

active

041283031

ABSTRACT:
A reflection free optical glass coated, in succession, with a medium refractive index layer, such as CeF.sub.3 or Al.sub.2 O.sub.3, a high refractive index layer such as TiO.sub.2, CeO.sub.2 or ZrO.sub.2 which layer contains a plurality of thin layers of MgF.sub.2 of about 10-100A in thickness uniformly interposed in the high refractive index material at intervals of about one eighth of the design wavelength. The outermost coating of the multi-layer optical glass is a low refractive index layer of MgF.sub.2.

REFERENCES:
patent: 3604784 (1971-09-01), Louderback
patent: 3958042 (1976-05-01), Katsube

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