Lens surface cutting apparatus and lens surface cutting...

Details Lens surface cutting apparatus and lens surface cutting... Lens surface cutting apparatus and lens surface cutting...

2011-01-04

2011-01-04

Fridie, Jr., Will (Department: 3724)

Turning

Lathe

With program control

C082S001110

Reexamination Certificate

active

07861626

ABSTRACT:
A lens surface cutting method for a spectacle lens includes the steps of calculating the mean curvature of a lens surface (5) to be machined, calculating a helical machining path (4) that matches the mean curvature, and cutting the lens surface (5) to be machined by a cutting means. The helical machining path (4) calculated by the helical machining path calculating step is a path in which helix spacings P (=P1, P2, . . . Pn) on the lens surface (5) to be machined are equidistant and a helix spacing d (=d1, d2, . . . dn) on an X-Y projection plane100increases continuously from a lens outer periphery toward a center. The cutting means cuts the lens surface (5) to be machined from the outer periphery toward the center along the helical machining path (4). Thus, a spectacle lens having a lens surface with a surface accuracy that is almost uniform throughout an entire surface can be obtained.

REFERENCES:
patent: 3802759 (1974-04-01), Andersson
patent: 5217335 (1993-06-01), Houchens et al.
patent: 5341604 (1994-08-01), Wood
patent: 6227952 (2001-05-01), Diehl et al.
patent: 6991525 (2006-01-01), Diehl et al.
patent: 2003/0043343 (2003-03-01), Diehl et al.
patent: 0849038 (1998-06-01), None
patent: 07-067659 (1995-07-01), None
patent: 2003-053602 (2003-02-01), None
patent: 2003-525760 (2003-09-01), None
patent: 2005-001100 (2005-01-01), None

Affiliated with

Also associated with

Rating

Lens surface cutting apparatus and lens surface cutting... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lens surface cutting apparatus and lens surface cutting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens surface cutting apparatus and lens surface cutting... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2722070