Electroluminescent device including dichroic and infrared reflec

Details Electroluminescent device including dichroic and infrared reflec Electroluminescent device including dichroic and infrared reflec

1975-03-07

1976-01-13

James, Andrew J.

357 74, 357 18, 350 1, H01L 3300

Patent

active

039328813

ABSTRACT:
A light source having an infrared-emitting diode and a luminescent material excitable in a step-like manner for converting the infrared radiation to visible rays comprises an optical cavity enclosing the luminescent material. A portion of the cavity wall is a dichroic filter that is substantially transparent to the visible rays but reflects the infrared radiation. The other cavity wall reflect the infrared radiation in particular.

REFERENCES:
patent: 2758261 (1956-08-01), Armstrong et al.
patent: 3281606 (1966-10-01), Lueck
patent: 3300646 (1967-01-01), Casebeer
patent: 3510732 (1970-05-01), Amans
patent: 3529200 (1970-09-01), Potter et al.
patent: 3593055 (1971-07-01), Geusic
patent: 3676668 (1972-07-01), Collins et al.
patent: 3711700 (1973-01-01), Westlund et al.
patent: 3769503 (1973-10-01), Kim
patent: 3821775 (1974-06-01), Baird

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