Method of making an ophthalmic lens of progressively variable fo

Details Method of making an ophthalmic lens of progressively variable fo Method of making an ophthalmic lens of progressively variable fo

1976-10-19

1978-10-10

Lowe, James B.

Metal working

Method of mechanical manufacture

Utilizing transitory attached element or associated separate...

295271, 29559, 51216LP, 264 1, 351169, B29D 1100

Patent

active

041188535

ABSTRACT:
The invention relates generally to the production of ophthalmic lenses having, on one face, an active zone of progressively variable radius of curvature.
According to the invention, when the blank from which such a lens is obtained is being cast, there is formed, on the periphery of its active zone, an edge region or facet extending continuously and circularly right round the said active zone for the subsequent support of the mould which is used to enable a gripper block to be cast on the face of the blank so as to enable a second machining operation to be carried out on the opposite face of the blank.

REFERENCES:
patent: 937763 (1909-10-01), Buchhop
patent: 3079736 (1963-03-01), Kratt
patent: 3227507 (1966-01-01), Feinbloom
patent: 3750272 (1973-08-01), Gomond
patent: 4018587 (1977-04-01), Maitenaz

Affiliated with

Also associated with

Rating

Method of making an ophthalmic lens of progressively variable fo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making an ophthalmic lens of progressively variable fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making an ophthalmic lens of progressively variable fo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1761095