Lens shape measuring instrument

Details Lens shape measuring instrument Lens shape measuring instrument

1994-06-02

1995-11-14

Fulton, Christopher W.

Geometrical instruments

Gauge

Lens

33200, G01B 520

Patent

active

054654955

ABSTRACT:
A lens shape measuring instrument includes a slide base plate in parallel with a chucking shaft of an eyeglass lens, a flat contactor arranged on a first measuring bar disposed on a first rotating shaft, and a V-shaped contactor disposed on a second measuring bar disposed on a second rotating shaft, so that the flat contactor and the V-shaped contactor can be brought into contact with the peripheral surface of the eyeglass lens at the same time. The thickness center of the peripheral surface of the eyeglass lens can be detected by detecting positional change of the slide base plate, and the thickness of the peripheral surface of the eyeglass lens can be detected by rotation difference between the first rotating shaft and the second rotating shaft corresponding to the positional change and from shape of the V-shaped contactor.

REFERENCES:
patent: 1389912 (1921-09-01), Stead
patent: 2646627 (1953-07-01), Tillyer et al.
patent: 3981081 (1976-09-01), Welch
patent: 4299032 (1981-11-01), Young
patent: 4383393 (1983-05-01), Takubo
patent: 4676004 (1987-06-01), Nakamura et al.
patent: 4776101 (1988-10-01), Ishibai
patent: 4979311 (1990-12-01), Bizer et al.

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