Patent ID: 7083746
Filing Date: 2006-08-01
Classification: B29D,B29L,F21S,F21V,Y10S

Abstract:
1. A method of manufacture of an optical component having a plurality of working surfaces and at least one neutral surface separating a one of said working surfaces from another one of said working surfaces and constituting a discontinuity between said working surfaces, said working and neutral surfaces defining between them acute angles alternating with obtuse angles, the method comprising: forming a mould with a plurality of surfaces complementary to said working and neutral surfaces of said component; and moulding said component on said surfaces of the mould, wherein the mould comprises a first mould surface complementary to at least one said neutral surface of said component and a second mould surface complementary to at least one said working surface adjacent to said neutral surface, said first and second mould surfaces defining an obtuse angle between them, and wherein the method further comprises the step of forming, in said first mould surface, a hollow, depression close to a junction of said first mould surface, the hollow deppression being formed during a continuous cutting operation by a cutting tool defining a diameter, the depth of the hollow deppression being approximately equal to the diameter of said cutting tool and said second mould surface.