Method of producing optical elements having interference layers

Details Method of producing optical elements having interference layers Method of producing optical elements having interference layers

1984-06-04

1986-07-29

Corbin, John K.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

350 16, 427162, C02B 528, C02B 522

Patent

active

046028471

ABSTRACT:
The invention concerns a method of producing optical elements, in particular filters, with interference layers comprising alternately slightly refractive and highly refractive dielectric layers deposited on a substrate S. The first layer 1 applied to the substrate is Al.sub.2 O.sub.3, constituting a slightly refractive layer, after which further layers 2 to n of ZnS and Al.sub.2 O.sub.3 are applied in an alternating sequence. The last layer n consists of Al.sub.2 O.sub.3. Such layers can be applied, at low temperatures, on flat substrates and, in particular, on sharply curved substrates. Production costs are reduced, and these layers possess the optical properties of known interference layers however resistance to external influences is greatly increased. In the case of mineral substrates, the coatings also offer considerable resistance to boiling.

REFERENCES:
patent: 2869010 (1959-01-01), Gray
patent: 3781090 (1973-12-01), Smith

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