Title:
ガラス製プリフォーム群の製造方法および光学素子の製造方法
Document Type and Number:
Japanese Patent JP4646074
Kind Code:
B2
Abstract:
The invention provides a glass frosted pre-forms group for pressure forming of precision models, which difference among the volume of the pre-forms and the tolerance on weight are very small despite of low average quality of the obtained pre-forms which compose the pre-forms group. The glass frosted pre-forms group is composed of a plurality of glass frosted pre-forms serving for the pressure forming of the precision models, which has an advantage that the ratio of the tolerance on weight of the glass frosted pre-forms and the average quality MAV of the glass frosted pre-forms is from 0.5*MAV [percent] to -0.5*MAV [percent].
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Inventors:
Akira Murakami
Application Number:
JP2006268826A
Publication Date:
March 09, 2011
Filing Date:
September 29, 2006
Export Citation:
Assignee:
HOYA CORPORATION
International Classes:
C03B11/00; G02B1/00
Domestic Patent References:
| JP2003238170A | ||||
| JP2003104744A | ||||
| JP2004284847A |
Attorney, Agent or Firm:
Shizuo Nakamura