Optical image detecting device with optical image differential c

Details Optical image detecting device with optical image differential c Optical image detecting device with optical image differential c

1990-09-06

1991-12-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250221, 340710, 359664, 359642, H01J 314

Patent

active

050755412

ABSTRACT:
An optical image detecting device with optical image differential capability, comprising a plurality of lens assemblies in quantity corresponding to the sort and amount of optical images to be discriminated, which lens assemblies are each comprised of a certain amount of optical lenses. The lens assemblies are disposed at respective angle positions corresponding to the relative angle positions of the optical images to detect. The shaded portion of each optical image which projects on each lens is larger than the thickness of each lens but smaller than the maximum diameter of each lens.

REFERENCES:
patent: 2402216 (1946-06-01), Vennigerholz
patent: 4796756 (1989-01-01), Ott
patent: 4906843 (1990-03-01), Jones et al.

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