Dichroic mirror with at least ten layers

Details Dichroic mirror with at least ten layers Dichroic mirror with at least ten layers

1978-05-19

1981-01-27

Henry, Jon W.

G02B 528

Patent

active

042471672

ABSTRACT:
A dichroic mirror made of at least ten or more alternate high refractive index and low refractive index layers for a designed wave length expressed by .lambda.o, basic optical film thickness of the high refractive index layers are represented by 1/4.lambda.o and 3/4.lambda.o, while the basic optical film thickness of the low refractive index layers is represented by 1/4.lambda.o. Thickness of the first layer, the second layer and the last layer as counted from a substrate, also of at least one layer of other intermediate layers are shifted from the basic optical film thickness, so that properties of the mirror are improved and a production thereof is made easier.

REFERENCES:
patent: 2890624 (1959-06-01), Widdop et al.
patent: 4047805 (1977-09-01), Sekimura

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