Title:
PREFORM FOR MOLDING AN OPTICAL ELEMENT AND METHOD OF MOLDING AN OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2011/102085
Kind Code:
A1
Abstract:
A preform for molding an optical element comprises an element body forming portion for forming an element body including optical surfaces, an annular flange forming portion provided on a periphery of the element body forming portion and having a first thickness, and an annular rim forming portion provided on a periphery of the flange forming portion and having a second thickness that is smaller than the first thickness to form annular steps on a top face side and a bottom face side of the flange forming portion, upon deformation caused by being heated and compressed, an outer periphery of the rim forming portion abutting on an inner surface of a barrel die with the annular steps left to remain.
Inventors:
YOSHIOKA MASATO (JP)
MIYAMOTO HARUHIKO (JP)
FUJIWARA TAKAYUKI (JP)
MIYAMOTO HARUHIKO (JP)
FUJIWARA TAKAYUKI (JP)
Application Number:
PCT/JP2011/000433
Publication Date:
August 25, 2011
Filing Date:
January 27, 2011
Export Citation:
Assignee:
FUJIFILM CORP (JP)
YOSHIOKA MASATO (JP)
MIYAMOTO HARUHIKO (JP)
FUJIWARA TAKAYUKI (JP)
YOSHIOKA MASATO (JP)
MIYAMOTO HARUHIKO (JP)
FUJIWARA TAKAYUKI (JP)
International Classes:
B29D11/00; C03B11/00; G02B3/00
Foreign References:
| JP2000313627A | 2000-11-14 | |||
| JP2007331311A | 2007-12-27 | |||
| JP2009069774A | 2009-04-02 | |||
| JP3003880U | 1994-11-01 |
Attorney, Agent or Firm:
WATANABE, Mochitoshi et al. (12-5 Iwamoto-cho 2-chome, Chiyoda-k, Tokyo 32, JP)
Download PDF:
Claims:
Previous Patent: ELIMINATION APPARATUS AND ELIMINATION METHOD
Next Patent: LOOP DETECTION DEVICE, SYSTEM, METHOD AND PROGRAM
Next Patent: LOOP DETECTION DEVICE, SYSTEM, METHOD AND PROGRAM