Optical lens
AssigneeOMRON Corporation
InventorShiro Ogata
Life of this patent
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Abstract
The present invention involves a corrective optical lens construction and process for its manufacture. The lens construction consists of a glass lens having a corrective layer consisting of a blazed grating of annuli whose angles are formed to correct aberrations in the glass lens. In a first embodiment, the corrective layer is formed on one convex surface of the lens. In a second embodiment, the corrective layer is formed on a second convex surface of the lens. Embodiments also describe alternative lens shapes and corrective layer construction. A method of manufacturing the lens is also disclosed in which the resin corrective layer is molded to the glass lens.
Claims15
An optical lens, comprising:
- a lens element formed of a first material;
- and
- a corrective layer formed of a second material disposed on a surface of said element, said corrective layer correcting aberrations of said lens element, said corrective layer comprising a blazed grating having a plurality of annuli.
A method of forming an optical lens having a corrective layer in the form of a blazed grating having a plurality of annuli, comprising the steps of:
- placing an uncured resin into a mold having a cavity formed in the shape of said corrective layer, at least part of said cavity having a stepped profile formed by a plurality of concentric annuli of different diameter;
- inserting a glass lens into said mold so that a surface of said glass lens contacts said uncured resin;
- exposing said lens and said resin to an agent causing said resin to cure;
- and
- removing said glass lens and cured resin corrective layer from said mold.
Dependencies are inferred from the claim text.