Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1988-07-05
1989-11-28
Perkey, W. B.
Optics: measuring and testing
Range or remote distance finding
With photodetection
354423, 354446, 354415, 356218, G03B 1505, G03B 700, G03B 1756
Patent
active
048840947
ABSTRACT:
From a data transmission device to a camera system including a camera and electronic flash device, operation instruction data such as set or calculated exposure control data, shutter release data instructing the operation of the camera system, flash emission testing data and the like are serially transmitted in the form of infrared light signal. When the reception of these data is completed, the camera starts its operation to control given operation of the camera system such as the exposure initiation of the camera, test light emission of the electronic flash device and the like in accordance with received data. Additionally, in the case where the data transmission device is an exposure meter which measures flash light and daylight, flash light emission operation or light emission interruption operation of the electronic flash device is controlled in accordance with the determination whether the exposure control data calculated and transmitted to the camera system is for the daylight photography or the flash light photography.
REFERENCES:
patent: 3518927 (1970-07-01), Mehlitz et al.
patent: 4036762 (1977-07-01), Troetscher et al.
patent: 4239356 (1980-12-01), Freudensschuss et al.
patent: 4462666 (1984-07-01), Orban
patent: 4601557 (1986-07-01), Bogle et al.
patent: 4636052 (1987-01-01), Bowsher
Kikukawa Yoshiiku
Kitaura Mashio
Nakai Masaaki
Omaki Takanobu
Taniguchi Nobuyuki
Minolta Camera Kabushiki Kaisha
Perkey W. B.
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