Lens pattern blank
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United States of America Patent
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-
Mar 1, 1988
Issued Date -
N/A
app pub date -
Dec 4, 1986
filing date -
Nov 14, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lens pattern blank has an axis scale pattern on the front face thereof to enable the user to check the axis of the pattern before cutting lenses, particular for bifocal lenses. The axis scale pattern includes a mark along the X axis and to the left of the origin on the front face of the blank and a range of angles with a 0 point at the X axis and a radial center at the cross. The angular markings are disposed to the right of the origin.
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