Light source for optical sound recording and reproduction appara

Details Light source for optical sound recording and reproduction appara Light source for optical sound recording and reproduction appara

1975-02-06

1976-05-25

Dixon, Harold A.

Radiant energy

Invisible radiation responsive nonelectric signalling

Optical change type

1791003E, 1791003Z, 250487, G01M 500

Patent

active

039596559

ABSTRACT:
A light source suitable for use in optical sound recording and reproduction apparatus includes a light emitting diode and a thin sheet of transparent material containing a fluorescent dye used to concentrate the output of the light emitting diode to a fine line.

REFERENCES:
patent: 2036275 (1936-04-01), Holman
patent: 2077102 (1937-04-01), Fardon
patent: 2350786 (1944-06-01), Marette et al.
patent: 3027219 (1962-03-01), Bradley
patent: 3059117 (1962-10-01), Boyle et al.
patent: 3354342 (1967-11-01), Ohntrup et al.
patent: 3426194 (1969-02-01), Donne
patent: 3484607 (1969-12-01), McGuire et al.
patent: 3522388 (1970-07-01), Miller
patent: 3654463 (1972-04-01), Geusic et al.

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