| 发明名称 |
AUTOFOCUS DEVICE AND DIGITAL CAMERA |
| 摘要 |
An autofocus device comprising includes a lens drive system for translating a lens, a first in-focus position detector for detecting a first in-focus position while translating the lens in a first direction by the lens drive system and a second in-focus position detector for detecting a second in-focus position while translating the lens in a direction opposite with respect to the first direction by the lens drive system, the second in-focus position detector operating after the first in-focus position is detected. A backlash detector detects a backlash in the lens drive system according to the first and the second in-focus positions. |
| 申请公布号 |
US2015296130(A1) |
申请公布日期 |
2015.10.15 |
| 申请号 |
US201514748486 |
申请日期 |
2015.06.24 |
| 申请人 |
RICOH IMAGING COMPANY, LTD. |
发明人 |
TERAUCHI Masakazu |
| 分类号 |
H04N5/232;G02B7/38;G02B7/09 |
主分类号 |
H04N5/232 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An autofocus device comprising:
a lens drive system for translating a lens; a first in-focus position detector for detecting a first in-focus position while translating the lens in a first direction by the lens drive system; a second in-focus position detector for detecting a second in-focus position while translating the lens in a direction opposite to the first direction by the lens drive system, the second in-focus position detector operating after the first in-focus position is detected; and a backlash detector for detecting a backlash in the lens drive system according to the first and the second in-focus positions. |
| 地址 |
Tokyo JP |
