Photography – Underwater – waterproof – or water-resistant camera – Having illumination device
Patent
1998-06-30
2000-05-09
Adams, Russell
Photography
Underwater, waterproof, or water-resistant camera
Having illumination device
396 25, 396267, G03B 1708
Patent
active
060615222
ABSTRACT:
A camera for underwater photography may be used together with one or more flash lamps each capable of serving both as a main lamp and as a slave. The camera is connected through its housing to a main lamp by way of an optical cable and when it is clicked, a control signal is emitted as a light signal and transmitted to the main lamp through the optical cable. The flash lamp has a photosensing unit for receiving a light signal and converting it into an electrical signal. A signal conversion circuit further converts this signal into a flash control signal by which the lamp flashes light. The photosensing unit is connected to the optical cable through a connector and receives light only through the cable when the connector is attached to it. When the lamp is used as a slave, the connector for the optical cable is detached from the photosensing unit and external light received through a transparent window is converted into an electrical signal for the emission of flash light.
REFERENCES:
patent: 4012749 (1977-03-01), Numata
patent: 4252426 (1981-02-01), Kuraishi
patent: 4492451 (1985-01-01), Maassen et al.
Inoue Akihide
Takematsu Yoshiyuki
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