Support for optical lenses and method for polishing lenses

Details Support for optical lenses and method for polishing lenses Support for optical lenses and method for polishing lenses

B - Operations, Transporting

24

B

B24B 13/01 (2006.01) B24B 13/005 (2006.01) B24B 13/02 (2006.01)

Patent

CA 2205292

A holder for precision working of optical lenses comprises a cylindrical base (4) designed as a dressing tool, a diaphragm holder (5) fastened thereto, an elasticdiaphragm (6) attached air-tight thereto as well as a centric duct (22, 23) crossing the base (4) and the diaphragm holder (5) axially. The dressing tool (4) is preferably a cup-shaped tool to which a lens holder formed as a ring element (15) can be fastened in a capping manner. The lens holder (15) is provided with banking and/or supporting surfaces (21) as well as engaging elements (17) for holding a lens (19) to be worked; moreover, it may be provided with additional dressing elements (18). The dressing tool (4) and the lens holder (15) are combined to a combined tool K which can be fastened to a common rotating machine spindle (1). A polishing tool (13) is first dressed with the cup-shaped tool (4) whereupon the lens holder (15) is mounted and the lens (19) held by it is polished with the dressed polishing tool (13) against which the lens (19) is uniformly pressed by the diaphragm (6).

Cette invention concerne un porte-lentille servant à l'usinage de précision et qui comprend une base cylindrique (4) conçue pour servir d'outil de dressage, un porte-diaphragme (5) fixé à cette base, un diaphragme élastique (6) monté de façon hermétique dans son support, ainsi qu'un conduit centré (22, 23) traversant la base (4) et le porte-diaphragme (5) dans le plan axial. L'outil de dressage (4) est de préférence un outil en forme de cuvette à laquelle un porte-lentille se présentant sous la forme d'un anneau (15) peut être assujetti comme une couronne. Le porte-lentille (15) comporte des surfaces inclinées et/ou de soutien (21) ainsi que des éléments de préhension (17) servant à maintenir la lentille (19) à usiner. De plus, il peut être doté d'éléments de dressage additionnels (18). L'outil de dressage (4) et le porte-lentille (15) sont combinés à un outil combiné K qui peut être rendu solidaire d'un arbre ordinaire de machine rotative (1). L'outil de polissage (13) est d'abord dressé au moyen de l'outil en forme de cuvette (4) sur laquelle est monté le porte-lentille, puis la lentille (19) appuyée uniformément par le diaphragme contre l'outil (14) est polie par ce dernier.

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