Interchangeable lens device, imaging device, imaging system, method, and program
US11493829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2018 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Nov 11, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2206/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are a device and a method by which high-precision auto focus (AF) processing can be performed while a focus lens or a zoom lens is being operated. An interchangeable lens acquires position information regarding a focus lens and a zoom lens at a predetermined time interval during an exposure time period of detection information acquisition pixels for use in calculation of a defocus amount (DF), and outputs the position information to an imaging device. The imaging device calculates the defocus amount (DF) by using information regarding the detection information acquisition pixels, calculates a reference focus lens position (Ref_fc) by using points, on a cam curve, corresponding to the inputted lens position information, calculates a target focus lens position (Tgt_fc) in an in-focus position, from the reference focus lens position (Ref_fc) and the defocus amount (DF), and outputs the target focus lens position (Tgt_fc) to the interchangeable lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.