Objective observation optical material

Details Objective observation optical material Objective observation optical material

1986-01-21

1988-06-14

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350276R, 351 46, G02B 2702, G02C 716

Patent

active

047508124

ABSTRACT:
An objective observation optical material comprises a sheet material composed of a plurality of spot-like transparent portions and an opaque portion and each of the spot-like transparent portions is formed into a circular shape having preferably a diameter of 0.7 to 2.0 mm or substantially a polygonal shape (including one whose sides are curved arcuately) inscribing or circumscribing such circle. The spot-like transparent portions are arranged to scatter in uniformly arranged positions so as to form connected regular triangles or squares whose sides are for example in the range from 2.0 to 5.5 mm.

REFERENCES:
patent: 2230009 (1941-01-01), Ordoriea
patent: 3731993 (1973-05-01), Peringer
patent: 3794414 (1974-02-01), Wesley
patent: 3967885 (1976-07-01), Byler
patent: 4012129 (1977-03-01), Byler
patent: 4249803 (1981-02-01), Byler

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