K
Karasaki Toshihiko
Publications - 28
Citations - 379
Karasaki Toshihiko is an academic researcher. The author has contributed to research in topics: Lens (optics) & Aperture. The author has an hindex of 9, co-authored 28 publications receiving 379 citations.
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Patent
Automatic focus detection system
Tokuji Ishida,Masataka Hamada,Kenji Ishibashi,Nobuyuki Taniguchi,Hiroshi Ootsuka,Toshio Norita,Karasaki Toshihiko +6 more
TL;DR: In this article, a camera with an automatic focusing device has an objective lens mounted on a camera, and an image formed by the objective lens is divided into a plurality of zones.
Patent
Camera with a multi-zone focus detecting device
TL;DR: In this article, a camera with a multi-zone focus detecting device has an objective lens mounted on a camera and an image formed by the objective lens is divided into a plurality of zones.
Patent
Focus detector of camera
TL;DR: In this article, a focus detection system of a camera detects the correlation between two images on condition that images of the same subject formed through the lenses 8 and 10 on line sensors 12 and 14 consisting of arrays of photodetection cells a1Wa10 and b1Wb16 are in the same direction.
Patent
Focus condition detecting device for cameras
TL;DR: In this paper, a plano-convex-lenses are used as the re-imaging lenses to improve the accuracy of focus condition detection, and an extremely thin masking member for blocking a part of the light rays incident on the planoConvex lenses to form the first and second images is sandwiched between the transparent plate and a surface of the module main body.
Patent
Focus condition detecting device using weighted center or contrast evaluation
TL;DR: In this paper, a focus condition detecting device for a camera is described, which provides first and second image sensors for calculating correlations between images each having passed through an objective lens of the camera, a plurality of image detecting blocks are defined on the first image sensor in order to execute correlation calculations with respect to each block for detecting focus conditions.