M
Matsumoto Toshiaki
Publications - 16
Citations - 160
Matsumoto Toshiaki is an academic researcher. The author has contributed to research in topics: Signal & Shutter. The author has an hindex of 5, co-authored 16 publications receiving 160 citations.
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Patent
Variable focal length camera
TL;DR: In this article, a bifocal camera capable of changing focal length of a photographic lens system and having lens drive means operable by a motor to switch the camera between a first focal length state where a main lens component is located at a rear position and a second focal length position where the main lens components are located at the front position and an auxiliary lens component was located at an operative position is presented.
Patent
Photographic devices for controlling flash photography
Tokuji Ishida,Nobuyuki Taniguchi,Masatoshi Itoh,Matsumoto Toshiaki,Tatsuro Izumi,Masatake Niwa +5 more
TL;DR: In this article, the firing current of an electronic flash tube is selectively restricted in accordance with the detection of whether or not the flash light amount necessary for a flash photograph is below a predetermined level prior to the firing of the flash tube for a photographic exposure.
Patent
Exposure system for a camera
Tatsuro Izumi,Nobuyuki Taniguchi,Matsumoto Toshiaki,Masatake Niwa,Ishida Tokuji,Masatoshi Itoh +5 more
TL;DR: In this article, a camera produces a mode signal for switching the light emitting apparatus between a first mode in which the instantaneous flash light is emitted and a second one in which a longer period of time is emitted.
Patent
Camera capable of functioning in accordance with informations received from a roll of film
Shigeru Oyokota,Nobuyuki Taniguchi,Takeo Hoda,Junichi Tanii,Kiyoshi Seigenji,Matsumoto Toshiaki +5 more
TL;DR: In this paper, a camera capable of functioning in accordance with informations received from a roll of film is provided with circuitry for generating first and second electric signals each changing in response to respective passages of the sprocket holes with a time lag provided between the changes in the first electric signals.
Patent
Photographing device using auxiliary light
Nobuyuki Taniguchi,Masatake Niwa,Izumi Tatsurou,Ishida Tokuji,Itou Masatoshi,Matsumoto Toshiaki +5 more
TL;DR: In this paper, the authors propose to execute a correct exposure by switching a flat light emission or flash light emission mode in accordance with whether a signal corresponding to a set shutter speed is large or small, monitoring the film exposure quantity and controlling the exposure of a focal plane shutter.