Luminescence detecting devices

Details Luminescence detecting devices Luminescence detecting devices

1986-09-30

1989-02-14

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

2504841, G01N 2162

Patent

active

048048453

ABSTRACT:
A luminescence detecting device including a luminescence sensitive member made of a transparent resin or the like and containing at least two different kinds of organic phosphors dispersed therein. The first organic phosphor is operative to absorb fluorescence from incident radiation such as the index phosphor stripes from a reflex color cathode ray tube, and has a response spectrum which overlaps with the wavelength range of the incident fluorescence. The first phosphor is designed to emit fluorescence in a higher wavelength range upon excitation by the incident fluorescent radiation. The second phosphor is responsive to the fluorescence emitted by the first phosphor since the spectra of the two phosphors overlap. The second type of organic phosphor emits its own range of fluorescence in a particular wave band and can be detected by a luminescence sensing portion of the device to provide a signal which can be used to control the operation of the cathode ray tube.

REFERENCES:
patent: 2476619 (1949-07-01), Nicoll
patent: 2553182 (1951-05-01), Cage
patent: 2739243 (1956-03-01), Sheldon
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patent: 3426212 (1969-02-01), Klaas
patent: 3484606 (1969-12-01), Masi
patent: 4088508 (1978-05-01), Gravisse
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patent: 4306248 (1981-12-01), Goodman
patent: 4437007 (1984-03-01), Koslow et al.
patent: 4492869 (1985-01-01), Suzuki et al.
patent: 4752716 (1988-06-01), Takeuchi

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