Patent ID: 7500908

Claim:
A support for pneumatically blocking an optical lens ( 200 ) on a machine or a device, the support, comprising: blocking means for receiving and holding one face ( 202 ; 201 ) of the optical lens, and coupling means ( 3 ; 22 ; 32 ) for fastening the block on a corresponding member of the machine or device, said blocking means including a central cavity ( 8 ; 24 ; 34 ) and possessing a gasket ( 9 ; 25 ; 35 ) possessing at least one annular portion ( 9 ; 25 ; 36 ) against which the lens is brought to bear in order to co-operate with said cavity and said gasket to define a suction chamber ( 11 ), the blocking means comprising abutment means ( 10 ; 26 ; 40 ) arranged to provide the optical lens with a rigid seat after the gasket has deformed elastically, wherein, the abutment means and the gasket are arranged in such a way that, in order to bring the lens into abutment against the abutment means, the annular portion of the gasket comes into contact with the lens so that the gasket deforms in compression over a width of the gasket that is at least three times greater than the thickness of said annular portion of the gasket.