Device for holding lenses, especially for eye glasses to be...

Details Device for holding lenses, especially for eye glasses to be... Device for holding lenses, especially for eye glasses to be...

C - Chemistry, Metallurgy

23

C

C23C 14/50 (2006.01) G02B 1/10 (2006.01) G02C 13/00 (2006.01)

Patent

CA 2271775

In a device for holding lenses for eye glasses to be coated (3,3',...) with a substrate holder (4) consisting of cap-like sheet-metal blanks (4a,b,c,d) forming a dish in the form of a spherical segment and having several drill-holes (5,5',...), rotating on a vertical axis (R) in the vacuum chamber (2) above a coating source (Q), the coating source (Q) being mounted to the side of the axis of rotation (R) and the lenses (3,3',...) being placed and held in the drill-holes (5,5',...), the mean perpendicular (M) of the respective drill-hole longitudinal axis (A) intersects the axis of rotation (R) of the substrate holder (4) at a point (O) roughly halfway between the two locations which are the points of intersection (C, F) of the mean perpendiculars (M',M ") of two notional drill-holes of the same drill-hole pitch circle (T) with the axis of rotation (R), whose drill-hole longitudinal axes (A',A ") intersect the coating source (Q), the one notional drill-hole however having the largest and the other notional drill-hole having the shortest distance from the coating source (Q).

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