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Forming mold for grinding glass optical element blank, manufacturing method of grinding glass optical element blank, and manufacturing method of optical element

A technology for forming molds and optical components, which is applied to the pressing of optical components, glass, and glass forming.

Active Publication Date: 2019-06-21
HOYA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the temperature of the glass raw material drops, the viscosity of the glass increases, so the fluidity of the glass is lost, making it difficult to follow the shape of the molding surface.
As a result, there were problems in that the desired shape could not be realized, and the molding accuracy decreased.
Such cracks (so-called cracks and cracks) will lead to deterioration of yield

Method used

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  • Forming mold for grinding glass optical element blank, manufacturing method of grinding glass optical element blank, and manufacturing method of optical element
  • Forming mold for grinding glass optical element blank, manufacturing method of grinding glass optical element blank, and manufacturing method of optical element
  • Forming mold for grinding glass optical element blank, manufacturing method of grinding glass optical element blank, and manufacturing method of optical element

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Embodiment Construction

[0036] The molding die of the present invention has at least an upper mold and a lower mold, which are molding molds for manufacturing glass optical element blanks for grinding (hereinafter sometimes simply referred to as "optical element blanks"), wherein the above-mentioned upper mold and lower mold The surface roughness (Rz) of at least one molding surface exceeds 10 μm.

[0037] According to such a molding die of the present invention, when the softened glass raw material is press-molded to manufacture a glass optical element blank for grinding, the occurrence of molding defects (such as cracks / cracks or poor elongation, etc.) or the failure of the molded body can be reduced. High-quality polishing glass optical element blanks can be efficiently produced without shape deviation. Furthermore, the grinding glass optical element blank produced by the molding die of the present invention is excellent in shape accuracy, so in the grinding / grinding process as a subsequent proces...

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Abstract

[Problem] The objective of the present invention is to provide a mold for a glass optical element blank for polishing which has excellent moldability and is capable of improving yield. [Solution] A mold according to the present invention is a mold which has at least an upper die and a lower die and is used to produce a glass optical element blank for polishing, wherein a molding surface of at least one of the upper die and the lower die has a surface roughness (Rz) of over 10 μm.

Description

technical field [0001] The present invention relates to a molding die for a glass optical element blank for grinding, a method for manufacturing the glass optical element blank for grinding, and a method for manufacturing an optical element. Background technique [0002] In recent years, with the diversification and spread of optical elements, the demand for optical elements made of glass is increasing, and improvement in productivity is also desired. [0003] As a molding method for glass optical elements, for example, reheat press molding and the like are widely used. In the reheating compression molding method, the softened optical glass raw material (hereinafter sometimes simply referred to as "glass raw material") is molded with a molding die to produce a glass optical element blank for polishing (hereinafter sometimes simply referred to as "optical element blank"). ".), it is subjected to grinding / grinding processing to obtain an optical element (optical lens, etc.). ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B11/06G02B3/00
CPCC03B11/084C03B11/086C03B2215/03C03B2215/06C03B2215/20C03B2215/24C03B2215/26Y02P40/57
Inventor 庄司昂浩池西干男
Owner HOYA CORP
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