Method and apparatus for controlling a remote light source

Details Method and apparatus for controlling a remote light source Method and apparatus for controlling a remote light source

1996-12-23

2000-02-22

Metjahic, Safet

Photography

With object illumination for exposure

Having artificial illumination termination control

396189, G03B 1505

Patent

active

060290137

ABSTRACT:
A method and apparatus for activating a remote light source in synchronization with an indication provided from a camera. A transducer is coupled to the external electrical connector of a conventional camera in order to convert the electrical signals that are output from the camera into an alternative form (e.g., optical signals). A different transducer is coupled to the external electrical connector of a remote light source, such as a photographic strobe. The light source transducer receives the signal from the camera transducer and converts the signal back into one or more conventional electrical signals to activate the remote light source. A light source activation signal and a light source modulation signal are multiplexed onto a single communication channel. A first indication is provided on the communication channel to activate the remote light source (i.e., cause the remote light source to emit light). A second indication is preferably provided on the communication channel in response to signals generated by a photo-detector within the camera. The second indication causes the remote light source to modulate its emission of light. The multiplexing camera transducer and demultiplexing light source transducer may be housed within the camera and remote light source, respectively. A Slave remote light source, coupled to a Slave light source transducer, is activated by detecting when either a Master remote light source or a local light source has been activated. An open end of an optical conductor that is coupled to a Slave light source transducer is directed in such a way as to be illuminated by the Master remote light source or local light source.

REFERENCES:
patent: 4252426 (1981-02-01), Kuraishi
patent: 4524761 (1985-06-01), Hattori et al.
patent: 4870438 (1989-09-01), Taniguchi et al.
patent: 4920371 (1990-04-01), Kaneko

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