Method of providing diffuse risers on a fresnel lens die

Details Method of providing diffuse risers on a fresnel lens die Method of providing diffuse risers on a fresnel lens die

1996-05-28

1999-12-07

Gorgos, Kathryn L.

Electrolysis: processes, compositions used therein, and methods

Electroforming or composition therefor

205 70, 205 79, 205221, 205223, 427135, 427277, 427282, C25D 502, C25D 548

Patent

active

059977094

ABSTRACT:
Methods of providing diffusing risers on a fresnel lens die having a plurality of optical facets, wherein adjacent optical facets are separated by a riser, the method including the steps of depositing a difflusing layer on the plurality of optical facets and the risers, and selectively removing the diffusing layer from the plurality of optical facets, wherein the diffusing layer remains substantially intact on the risers. The diffusing layer can be deposited in an electrolyte bath substantially free of grain refiners.

REFERENCES:
patent: 3712707 (1973-01-01), Henkes, Jr.
patent: 4114983 (1978-09-01), Maffitt et al.
patent: 4229085 (1980-10-01), Yamada et al.
patent: 4334966 (1982-06-01), Beach et al.
patent: 4781801 (1988-11-01), Frisby
patent: 5453880 (1995-09-01), Vanderwerf

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