Title:
プレス成形用ガラス素材、該ガラス素材を用いたガラス光学素子の製造方法、及びガラス光学素子
Document Type and Number:
Japanese Patent JP4897072
Kind Code:
B2
Abstract:
Disclosed is a glass material for press forming providing an optical element having a sufficient optical performance without surface cracks, cloudiness, scratches, and the like even when the glass material contains a highly reactive component. Also disclosed are an optical element having a sufficient optical performance without surface cracks, cloudiness, scratches, and the like and a method for manufacturing the same. Specifically disclosed is a glass material for press forming which comprises a core portion composed of multicomponent optical glass and a surface glass layer covering at least a region serving as an optical functional surface of the core portion. The surface glass layer contains more than 90 mass % of SiO2, and the thickness of the layer is less than five nanometers. Also specifically disclosed is a method for manufacturing a glass optical element by heating the glass material and by press forming the softened glass material using a forming die. Yet also specifically disclosed is a press formed glass optical element having a core portion composed of multicomponent optical glass and a surface glass layer covering at least an optical functional surface of the core portion. The surface glass layer contains more than 90 mass % of SiO2, and the thickness of the layer is less than five nanometers.
Inventors:
Zou Gakuroku
Hiroshi Kono
Koichiro Shiraishi
Hiroshi Kono
Koichiro Shiraishi
Application Number:
JP2010111973A
Publication Date:
March 14, 2012
Filing Date:
May 14, 2010
Export Citation:
Assignee:
HOYA CORPORATION
International Classes:
C03C17/02; B82Y20/00; B82Y30/00; B82Y40/00; C03B11/00; C03C3/06; C03C3/062; C03C3/064; C03C3/066; C03C3/068; C03C3/16; C03C3/17; C03C3/19; C03C3/21; C03C3/23; C03C3/253; G02B1/00
Domestic Patent References:
| JP2000351636A | ||||
| JP4083724A | ||||
| JP2004250295A | ||||
| JP2007261877A | ||||
| JP8217466A | ||||
| JP2006193389A |
Attorney, Agent or Firm:
Patent Service Corporation Patent Office Sykes