Fluorescent radiation collector for image scanner

Details Fluorescent radiation collector for image scanner Fluorescent radiation collector for image scanner

1990-05-07

1991-08-13

Fields, Carolyn E.

Radiant energy

Automatic/serial detection of similar sources

25022718, 25022723, 25022728, 350 961, 350 9634, G02B 600

Patent

active

050398547

ABSTRACT:
For use in an image scanner, a highly efficient multistage fluorescent radiation collector collects radiation emitted, reflected, or transmitted from an image storage medium. A first elongated light pipe member has a first fluorescent dye which absorbs radiation from the storage medium and emits radiation of another wavelength. A second elongated light pipe member located adjacent to but optically isolated from the first member has a second fluorescent dye which absorbs emitted radiation escaping from the first member and which emits radiation of a third wavelength. Preferably, a third elongated light pipe member located adjacent to but optically isolated from the second member has a third fluorescent dye which absorbs emitted radiation escaping from the second member and which emits radiation of a fourth wavelength. Much of the radiation emitted by the first, second, and third dyes is channelled along the respective first, second, and third light pipe members to radiation sensors at the end(s) of the members.

REFERENCES:
patent: 4149902 (1979-04-01), Mauer et al.
patent: 4298802 (1981-11-01), Quella et al.
patent: 4371897 (1983-02-01), Kramer
patent: 4799748 (1989-01-01), Brown
patent: 4884860 (1989-12-01), Brown

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