Installation with distribution mask for vapor deposition of a coating on optical articles on a rotary support
AssigneeBnl Eurolens
InventorVicente Estevez Rodriguez
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Abstract
The invention relates to an apparatus for the vapor deposition of a coating on optical articles, comprising a distribution mask (32) for controlling the vapor deposition of a coating on optical articles that is positioned in the path of some of the molecules emitted by said emitting source in the direction of the rotatable support for optical articles. The distribution mask (32) is fitted with at least one arm (34) positioned so as to mask at least one partial zone (16) of an individual housing (28) on a portion of the revolution turn, this masked partial zone (16) comprising the center of the individual housing (28).
Claims17
An installation for vapor deposition of a coating on optical articles, comprising:
- a source emitting molecules of a material to be deposited on the optical articles, the molecules being emitted from an evaporation cone;
- a rotary support which is concave shaped, said rotary support comprising individual receptacles, each individual receptacle configured to receive one optical article of the optical articles and undergoes revolutions while the rotary support is rotating while in operation, the individual receptacles of the optical articles are arranged in concentric tracks of the rotary support;
- a distribution mask arranged in a path of a portion of the molecules emitted by said source emitting molecules toward the rotary support while in operation;
- wherein the distribution mask is formed with a central portion having two curved sides, a front portion including two straight sides extending from a front of the central portion, a rear portion including a radial holding axis, and at least one arm on each curved side of the central portion, wherein, each arm arranged so as to mask only a partial zone of an individual receptacle over a part of a revolution of the individual receptacle, and the at least one arm on each curved side of the central portion of the distribution mask is arranged to extend along an associated track of the rotary support and the at least one arm on each curved side of the central portion are arranged symmetrically relative to the radial holding axis of the distribution mask, the partial zone which is masked including the center of the individual receptacle while lateral portions of an optical article in the receptacle are exposed to the molecules emitted by the source;
- wherein the optical articles have a curvature or sphericity such that a center of the one optical article of the optical articles is closer to the source than peripheral edges of the one optical article of the optical articles.
Dependencies are inferred from the claim text.