Optical sound head combined with a sound film projector

Details Optical sound head combined with a sound film projector Optical sound head combined with a sound film projector

1996-05-28

1998-04-14

Healy, Brian

Optical waveguides

With disengagable mechanical connector

Optical fiber to a nonfiber optical device connector

385 92, 385 94, 385 33, 385147, 372 43, 352 11, 352 12, 352 25, 352 34, G02B 636, H01S 318, G03B 3100

Patent

active

057402949

ABSTRACT:
An optical sound head (L), comprising a red laser diode (11) and a inspection window (90), allowing easy functional inspection, but also simple adjustment during manufacture. The laser diode (11) and all optical (10) and electronic (20) assemblies to be adjusted to a specimen, are accommodated in a replaceable assembly (1), for easy and repeatable (A) replacement. A minimum signal-to-noise ratio for analogue sound scanning is achieved by an additional aperture (15), reducing the light intensity applied to the center of an aperture slot (8). Both apertures (8, 15) are preferably designed as unsupported, laser-cut metal sheets.

REFERENCES:
patent: 3746438 (1973-07-01), Misawa et al.
patent: 4200363 (1980-04-01), Olodort
patent: 4577302 (1986-03-01), Allen
patent: 5074682 (1991-12-01), Uno et al.
patent: 5155510 (1992-10-01), Beard
patent: 5386255 (1995-01-01), Beard et al.

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