Device for holding lenses, especially for eye glasses to be coated in a vacuum coating or sputtering machine
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United States of America Patent
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Jan 9, 2001
Grant Date -
N/A
app pub date -
May 12, 1999
filing date -
May 16, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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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