MOULDED PHOTOCHROMIC LENS AND METHOD OF MAKING SAME

MOULDED PHOTOCHROMIC LENS AND METHOD OF MAKING SAME

A lens has two or more layered sections of thermosetting material, and a substantially homogenous formation in which at least one of the layered sections has an active photochromic material present. The article is made by: forming a mould cavity from first and second mould halves; loading the mould...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: KINGSBURY, JEFFREY, M
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PERFORMING OPERATIONS
PHYSICS
PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE
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:A lens has two or more layered sections of thermosetting material, and a substantially homogenous formation in which at least one of the layered sections has an active photochromic material present. The article is made by: forming a mould cavity from first and second mould halves; loading the mould cavity with a first thermosetting material; partially curing that material; changing the second mould half to define a subsequent mould cavity in which the partially cured material is present; loading the subsequent mould cavity with a subsequent thermosetting material; and curing the first and subsequent thermosetting materials. At least one of the thermosetting materials is loaded with an active photochromic material.