Invention Grant
- Patent Title: Method for manufacturing optical glass element
- Patent Title (中): 光学玻璃元件的制造方法
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Application No.: US12295611Application Date: 2007-03-28
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Publication No.: US08826695B2Publication Date: 2014-09-09
- Inventor: Xuelu Zou , Yasuhiro Fujiwara
- Applicant: Xuelu Zou , Yasuhiro Fujiwara
- Applicant Address: JP Tokyo
- Assignee: Hoya Corporation
- Current Assignee: Hoya Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2006-100819 20060331
- International Application: PCT/JP2007/056673 WO 20070328
- International Announcement: WO2007/119565 WO 20071025
- Main IPC: C03B11/00
- IPC: C03B11/00 ; C03C17/34 ; C03B25/02 ; C03C3/068 ; C03C3/155

Abstract:
A method for manufacturing an optical glass element, comprising: annealing a press-molded product obtained by press molding into a lens shape a glass material comprised of a core portion comprised of an optical glass (first glass) with a transition temperature of 550° C. or higher and a covering portion comprised of a second glass covering the surface of said core portion; and then removing the covering layer from the surface of the press-molded product to obtain an optical glass element. To provide a method for manufacturing high-optical-performance mold-pressed lenses in which the defective external appearance of optical elements comprised of high-temperature glass materials with a Tg of 550° C. or higher is prevented.
Public/Granted literature
- US20100018252A1 METHOD FOR MANUFACTURING OPTICAL GLASS ELEMENT Public/Granted day:2010-01-28
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