K
Kosei Kosako
Researcher at Asahi Kasei
Publications - 29
Citations - 338
Kosei Kosako is an academic researcher from Asahi Kasei. The author has contributed to research in topics: Optical axis & Zoom lens. The author has an hindex of 8, co-authored 29 publications receiving 338 citations.
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Patent
Distance measuring apparatus
TL;DR: In this article, the authors provided a distance measuring apparatus in a lens-shutter type camera provided with a photographic lens, a focal length of the photographic lens being variable, and the distance measuring device included: a pair of image forming lenses each forming a subject image; a pair-of line sensors on which the subject images are respectively formed through the pair of forming lenses; a plurality of light receiving areas formed correspondingly on each pair of line sensors, the plurality of receiving areas each including a predetermined number of the light receiving elements.
Patent
Waterproof and/or water-resistant camera
Masahiro Hayakawa,Kosei Kosako +1 more
TL;DR: In this article, a waterproof and/or water-resistant camera including a movable photographing lens barrel which moves in the optical axis direction of the camera, an air breathing passage for connecting the interior and the exterior of a camera, and a protection cover which covers the air-permeable and water-impermeability filter to constitute an air connecting assembly for the air.
Patent
Compact camera with automatic focal length dependent exposure adjustments
TL;DR: In this paper, a camera has a variable focal length photographing optical system, a multisegment photometric system that is separate from the camera's focal length, each segment outputting a brightness level, and a controller that determines an exposure value for exposing a film by using weighting coefficients to calculate a weighted average of the brightness levels outputted by the system.
Patent
Zoom lens barrel and camera having such a barret
Takayuki Ito,Hiroshi Nomura,Kazuyoshi Azegami,Takamitsu Sasaki,Yasushi Tabata,Norio Numako,Yoshinari Tanimura,Takuma Sato,Masaaki Kishimoto,Kosei Kosako +9 more
TL;DR: A zoom lens camera includes a whole unit moving device to move a front lens group and a rear lens group together as a whole in an optical axis direction, and a relative moving means to vary a distance between the front lens groups and the rear lens groups as mentioned in this paper.
Patent
Multi-point object distance measuring device
Kosei Kosako,Takuma Sato +1 more
TL;DR: In this article, a multi-point object distance measuring device which includes a plurality of object distance areas, and a detecting device for detecting the amounts of defocus or distances of objects in the plurality of objects measuring areas is presented.