Composite glass and resin optical element with an aspheric surface
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorToru Chiba
Life of this patent
Estimating the term…
Abstract
In order to provide an optical element with an aspheric surface, as well as a process by which the optical element can be mass-produced with high efficiency and consistent precision, the improved optical element with an aspheric surface includes a glass substrate and an overlying light-transmissive resin layer worked to have an aspheric surface. This optical element can be produced by molding a light-transmissive resin composition as it is cured between a glass substrate and a mold having an aspheric surfaced shape. The preferred light-transmissive resin has a Rockwell hardness of 40-80 on the M scale at -40.degree. C. to 60.degree. C.
Claims6
An optical element with an aspheric surface comprising:
- a glass substrate and an overlying light-transmissive resin layer, said resin layer having an aspheric surface, and a Rockwell hardness which is in the range of 40-80 on the M scale at -40.degree. C. to 60.degree. C.
Dependencies are inferred from the claim text.