Invention Grant
- Patent Title: Multi-point distance measuring apparatus
- Patent Title (中): 多点测距仪
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Application No.: US684499Application Date: 1991-04-15
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Publication No.: US5140359APublication Date: 1992-08-18
- Inventor: Masaki Higashihara , Ichiro Ohnuki , Akira Akashi , Terutake Kadohara , Hidehiko Fukahori , Yasuo Suda , Kenji Itoh
- Applicant: Masaki Higashihara , Ichiro Ohnuki , Akira Akashi , Terutake Kadohara , Hidehiko Fukahori , Yasuo Suda , Kenji Itoh
- Applicant Address: JPX Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JPX Tokyo
- Priority: JPX63-118821 19880516
- Main IPC: G02B7/34
- IPC: G02B7/34
Abstract:
An auto focusing device for foreseeing-calculating lens driving data for making a lens focus on an object after a predetermined time on the basis of the past focus adjusting operation data and the latest focus detection data. A plurality of distance measuring points are read to effect distance measurements at a time. Data suitable for foreseeing calculation is found from the respective distance measuring points, and the data suitable for foreseeing calculation is specified as the latest focus detection data used for the foreseeing calculation.
Public/Granted literature
- US4084223A Control unit Public/Granted day:1978-04-11
Information query
