Optical component, method of molding optical component, and mold

Details Optical component, method of molding optical component, and mold Optical component, method of molding optical component, and mold

1999-04-08

2000-11-07

Ben, Loha

Optical: systems and elements

Lens

With support

359819, 359805, 264 132, G02B 702

Patent

active

061445053

ABSTRACT:
This invention provides an optical component free from weld formation in its optical surface and having an excellent optical performance, a method of molding an optical component, and a mold for molding an optical component. For this purpose, an optical component as a plastic molded product having an optical function, is formed with a molding surface with a shape of a curved surface, and a flange portion between the molding surface and a gate portion. At least part of a surface constituting the flange portion is molded by injecting a molten resin along a wall surface that forms an angular difference of 15.degree. or less which is substantially equal to a tangential angle to the curvature of the curved surface of the molding surface, which is near the flange portion.

REFERENCES:
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patent: 5434707 (1995-07-01), Dalzel et al.
patent: 5694256 (1997-12-01), Winkler
patent: 5788910 (1998-08-01), McNelis et al.
patent: 5808817 (1998-09-01), Miyamoto et al.

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