| 发明名称 |
Optical apparatus for calculating an object distance |
| 摘要 |
An optical apparatus includes a first driver configured to drive a focus lens unit in autofocusing, a second driver configured to drive the focus lens unit in the autofocusing, a first detector configured to detect a driving amount of the first driver, a second detector configured to detect a driving amount of the second driver, a memory configured to store a relationship between information of detection results of the first and second detectors, and an object distance as a distance from the optical apparatus to an object, and a controller configured to obtain information of the object distance based upon the relationship stored in the memory and the detection results of the first and second detectors. |
| 申请公布号 |
US8743267(B2) |
申请公布日期 |
2014.06.03 |
| 申请号 |
US201213661276 |
申请日期 |
2012.10.26 |
| 申请人 |
Canon Kabushiki Kaisha |
发明人 |
Ishikawa Masanori;Kashiwaba Seiichi;Koyama Atsushi;Mizushima Masayasu;Shukuin Hirokazu |
| 分类号 |
H04N5/225;G03B13/00;G02B27/10 |
主分类号 |
H04N5/225 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An optical apparatus comprising:
a first driver configured to drive a focus lens unit in autofocusing; a second driver configured to drive the focus lens unit in the autofocusing; a first detector configured to detect a driving amount of the first driver; a second detector configured to detect a driving amount of the second driver; a memory configured to store a relationship between information of detection results of the first and second detectors, and an object distance as a distance from the optical apparatus to an object; and a controller configured to obtain information of the object distance based upon the relationship stored in the memory and the detection results of the first and second detectors.
|
| 地址 |
JP |
