LENS MANUFACTURING METHOD AND MOLD ASSEMBLY USING IN THIS METHOD

PROBLEM TO BE SOLVED: To mold even a lens having a concave surface with high surface precision and high productivity by preventing the lens from biting into the convex-forming surface. SOLUTION: In this method, a process to heat a lens material 6 under pressure by molds 2 and 3 into a lens 7 of a de...

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Bibliographische Detailangaben
1. Verfasser:	TOKUNAGA TOMOKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY GLASS INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To mold even a lens having a concave surface with high surface precision and high productivity by preventing the lens from biting into the convex-forming surface. SOLUTION: In this method, a process to heat a lens material 6 under pressure by molds 2 and 3 into a lens 7 of a desired shape and a process to separate the lens 7 from a first molding surface 3a of the mold 3 by generating a level difference allowing the first molding surface 3a to recede from a second molding surface 4a on account of the difference in the coefficient of linear thermal expansion between the first molding surface 3a and the second molding surface 4a for molding a part including the effective diametral range of the lens 7 and the outside part of the former part, in the molds 2 and 3, following the cooling process after molding, are provided. COPYRIGHT: (C)2005,JPO&NCIPI