Light collector and prism light source for photoelectric readers

Details Light collector and prism light source for photoelectric readers Light collector and prism light source for photoelectric readers

1976-05-17

1978-01-10

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350 96R, 350 96WG, G02B 514

Patent

active

040681211

ABSTRACT:
A light collector and prism that collects light from a single bulb and produces a narrow strip light beam is disclosed. The light collector and prism is formed of an elongate, integral piece of transparent material (plastic) and includes a light collecting section at one end and a prism section at the other end. Light rays emitted from a small bulb positioned in an aperture in the light collecting section are collected, to some extent (e.g., imperfectly) collimated, and directed into the prism section. The prism section extends outwardly from the collector section so as to receive the light rays collected, collimated and directed by the collecting section. The prism section includes a plurality of prism surfaces located along one edge thereof. Light rays directed by the light collecting section toward the prism section are reflected by the prism surfaces toward an opposing, narrow, light emitting edge of the prism section. Light rays emitted from the narrow edge form a narrow strip light beam. Preferably, all of the surfaces of the light collector and prism are metalized, except for the aperture within which the light source is mounted and, the narrow edge of the prism through which the narrow strip light beam is emitted.

REFERENCES:
patent: 2946253 (1960-07-01), Clark, Jr.
patent: 3731107 (1973-05-01), Goodwin et al.
patent: 3860814 (1975-01-01), Klang et al.

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