Chromatic vision correction resin glasses with reduced concave reflection
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United States of America Patent
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-
Nov 7, 2000
Grant Date -
N/A
app pub date -
Jul 23, 1999
filing date -
Jul 24, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The chromatic vision correction resin glasses with reduced concave reflection is manufactured according to the following steps. First, the resin eyeglass is dyed chemically to meet the requirements of 4 sorts (21 kinds) of chromatogram correction curves. Second, the convex of resin eyeglass is coated in a vacuum environment with a CF film, the thickness of which should be controlled to make the light permeability of the dyed resin eyeglass decrease about 10% to lower the reflection of its concave. Third, in order to reduce concave reflection further, it is practicable to coat the concave with permeance promotion film by evaporation. This technique can eliminate the visual disturbance of eyes imaging which occurs in the surrounding of intensive light. As a result, the effect of chromatic vision correction is improved. Meanwhile, it also can diminish the production cost, increase productivity, so that it not only achieves the aim of chromatic vision correction, but also has the effect of eyes' protection.
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