G - Physics – 03 – B
Patent
G - Physics
03
B
315/12
G03B 15/02 (2006.01) H05B 37/02 (2006.01) H05B 39/04 (2006.01)
Patent
CA 1237468
ABSTRACT The present invention provides a photographic lighting apparatus for illuminating a photographic object in taking the object with a camera such as a television camera or an 8mm movie camera. The photographic lighting apparatus is capable of illuminating the object practically at a fixed intensity of illumination regardless of the variation of the distance between the object and the lamp thereof by reducing the brightness of the lamp when the object is located near to the lamp and increasing the same when the object is located remotely. The brightness of the lamp is regulated by controlling-the continuity angle of a thyristor connected to the lamp according to the output signal of a photometric circuit which measures the intensity of illumination of the object.
468564
Kamon Akio
Odaka Yukio
Kabushiki Kaisha Tocado
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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