SEMI−FINISHED RESIN LENS, AND METHOD AND APPARATUS FOR PRODUCING THE SAME

Title:

SEMI−FINISHED RESIN LENS, AND METHOD AND APPARATUS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2003/009983

Kind Code:

A1

Abstract:

A semi−finished resin lens which has a lens part (9c) located in the central portion and a brim part (10c) being molded in one piece&semi and a method for producing the semi−finished resin lens which comprises charging a liquid resin material into the cavity of a shell (5a) for molding a resin lens in an amount of 50 to 90 % of the volume of the cavity, holding the shell in a nearly horizontal position, to generate a rising part through surface tension and form a mass (7a) of the resin material, effecting a polymerization through heating while maintaining the horizontal position, and releasing a mold for the shell, to provide a molded resin article (8c). The semi−finished resin lens can be used for producing a resin lens having an desired diameter smaller than that of the mold, and thus allows the savings of a resin for optical use.

Inventors:

KAGEI KAZUNORI (JP)
YAMAMOTO YOSHIHIRO (JP)

Application Number:

PCT/JP2002/007494

Publication Date:

February 06, 2003

Filing Date:

July 24, 2002

Export Citation:

Click for automatic bibliography generation Help

Assignee:

ASAHI LITE OPTICAL CO LTD (JP)
KAGEI KAZUNORI (JP)
YAMAMOTO YOSHIHIRO (JP)

International Classes:

B29C39/02; B29C39/24; B29C39/26; B29D11/00; B29C33/30; (IPC1-7): B29C39/02; B29C39/34

Domestic Patent References:

WO1996023651A2

1996-08-08

Foreign References:

JPH03284913A	1991-12-16
JPH02157130A	1990-06-15
JPS61290012A	1986-12-20
JP2000039594A	2000-02-08

Other References: