Method for achieving improved optical flatness and for making pr

Details Method for achieving improved optical flatness and for making pr Method for achieving improved optical flatness and for making pr

1991-06-26

1992-06-02

Rachuba, M.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51326, B24B 100

Patent

active

051175916

ABSTRACT:
A lightweight optical system is provided for enabling a person wearing such system to transpose viewed images. The apparatus comprises a removable, elongated, lighter than glass prism mounted in a lightweight frame which fits snugly on the face and is secured by a strap. The frame includes light occluding elements which prevent substantially all untransposed light from entering the eyes of the wearer.

REFERENCES:
patent: 2394610 (1946-02-01), Hawkins
patent: 2394645 (1946-02-01), Turner et al.
patent: 2409108 (1946-10-01), Crowley
patent: 2705392 (1955-04-01), Imler
patent: 3177628 (1965-04-01), Highberg
patent: 3364629 (1968-01-01), Zalewski
patent: 3587196 (1971-06-01), Dunn
patent: 4198788 (1980-04-01), Fleetwood et al.

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