Information mark display device

Details Information mark display device Information mark display device

1980-12-30

1983-01-04

Waring, Alvin H.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340691, 354 53, G03B 1720

Patent

active

043674631

ABSTRACT:
An information mark display device with the mark representative of information to be displayed being formed in at least one of the surfaces of a flat transparent substrate in a portion thereof and arranged upon illumination by light from a lamp to present the information display. The information mark display presenting portion is constructed from an array of microprisms, and the microprisms are so oriented that at least one of the inclined surfaces of each microprism deflects the rays of light from the lamp into the field of view of the finder.

REFERENCES:
patent: 4045794 (1977-08-01), Ohta
patent: 4294529 (1981-10-01), Sato et al.

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