Goggles' lenses

Details Goggles' lenses Goggles' lenses

1991-02-22

1992-03-10

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351 43, 359720, G02C 702, G02B 1318

Patent

active

050945203

ABSTRACT:
An axiosymmetric eccentric spherical polycarbonate lens (2) for goggles (1), comprising inner (7) and outer (8) spherical surfaces defined by centers of curvature 0.sub.1 and 0.sub.2 and by radii R.sub.1 and R.sub.2, respectively, 0.sub.1 and 0.sub.2 being both located on the lens's axis of symmetry (5), at a distance D from each other, the lens being more distal from 0.sub.1 than from 0.sub.2, the length of R.sub.2 being about 1.025-1.035 R.sub.1, and that of D about 0.0510-0.0564.

REFERENCES:
patent: 3040616 (1962-06-01), Simpson
patent: 3672750 (1972-06-01), Hagen
patent: 3899244 (1975-08-01), Mulder

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