Method for forming an inhomogeneous optical layer

Details Method for forming an inhomogeneous optical layer Method for forming an inhomogeneous optical layer

1983-05-03

1984-01-31

Hoffman, James R.

Coating processes

Optical element produced

427164, 427166, 427167, G02B 110, B05D 506

Patent

active

044289790

ABSTRACT:
An inhomogeneous optical layer is formed on a surface of a substrate in a vacuum coater, in which the substrate is moved along a travelling path having path sections and a substance is evaporated from its source and deposited on the surface while the deposited substance is exposed to gas which is able to react on the substance. In such an operation, the deposition rate of the substance is varied monotonously along the path in each of the path section in order that, in a layer formed by the deposition on the substrate, the content of the substance and that of the reaction product are varied monotonously in the direction of thickness. If the refractive index of the substance is different from that of the reaction product, the resultant refractive index in the layer is varied monotonously in the direction of the thickness of the layer.

REFERENCES:
patent: 3520716 (1970-07-01), Okamoto et al.

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