发明名称 |
Automatic focusing device and automatic exposure control device |
摘要 |
An automatic focusing device which comprises a defocus amount detecting unit for detecting a defocus amount attributable to a first optical system of an interchangeable lens assembly and a second optical system of an AF convertor, a converting circuit for converting the defocus amount into a data corresponding to a focusing amount of the second optical system which varies in non-linear relationship to the defocus amount, and an optical drive unit for moving the second optical system on the basis of a data representative of the focusing amount supplied from the converting circuit.
|
申请公布号 |
US4728980(A) |
申请公布日期 |
1988.03.01 |
申请号 |
US19860893363 |
申请日期 |
1986.08.04 |
申请人 |
MINOLTA CAMERA KABUSHIKI KAISHA |
发明人 |
NAKAMURA, AKIYOSHI;ANDO, MAKOTO;OGINO, SHUJI;TANIGUCHI, NOBUYUKI |
分类号 |
G02B7/36;G03B7/091;(IPC1-7):G03B3/00 |
主分类号 |
G02B7/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|