Method for making optical preforms and optical elements by press

Details Method for making optical preforms and optical elements by press Method for making optical preforms and optical elements by press

1997-01-24

1999-10-12

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

264 24, 264 27, 425808, B29D 1100

Patent

active

059650699

ABSTRACT:
A method for making optical preforms of optical elements without residual stress or distortion is provided. In this method, an optical material is supplied between upper and lower molds. The upper mold has a plurality of recesses arranged in a predetermined pitch, and each recess corresponds to a first surface shape of the optical element. The lower mold has a plurality of recesses facing the recesses of the upper mold and each recess of the lower mold corresponds to a second surface shape of the optical element. The supplied optical material is pressed between the upper and lower molds to be a set of optical preforms. The set of optical preforms is processed by die punching or tool cutting to separate each optical preform from the set of optical preforms. Each optical preform is used for producing an optical element by further pressing. Alternatively, optical element can be formed directly by the press molding process.

REFERENCES:
patent: 2298429 (1942-10-01), Smith
patent: 2304217 (1942-12-01), Tillyer
patent: 2304663 (1942-12-01), Smith et al.
patent: 2332674 (1943-10-01), Smith
patent: 2432668 (1947-12-01), Kingston
patent: 3651192 (1972-03-01), Erickson
patent: 5100590 (1992-03-01), Ruhlin
patent: 5204127 (1993-04-01), Prusha
patent: 5368790 (1994-11-01), Greshes
patent: 5593620 (1997-01-01), Galas
patent: 5718850 (1998-02-01), Takano et al.
patent: 5759456 (1998-06-01), Watanabe et al.
Communication from European Patent Office and attached Search Report, dated May 28, 1998.

Affiliated with

Also associated with

Rating

Method for making optical preforms and optical elements by press does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for making optical preforms and optical elements by press, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making optical preforms and optical elements by press will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-649077