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US09591204B2 Focus detecting unit, focus detecting method, image pickup apparatus, and image pickup system 有权
对焦检测单元，聚焦检测方法，图像拾取装置和图像拾取系统

Focus detecting unit, focus detecting method, image pickup apparatus, and image pickup system
摘要：
A focus detecting unit that includes a corrector configured to correct a signal output from an image sensor using a first shading correction value when the half-mirror is retreated from an optical path, and to correct the signal using a second shading correction value different from the first shading correction value when the half-mirror is inserted into the optical path, and a focus detector configured to provide a focus detection based on the signal corrected by the corrector.
摘要（中）：

一种聚焦检测单元，其包括校正器，该校正器被配置为当半反射镜从光路退出时，使用第一着色校正值来校正从图像传感器输出的信号，并且使用不同于第二阴影校正值的第二阴影校正值来校正信号 半透镜插入光路时的第一阴影校正值，以及配置为基于由校正器校正的信号提供焦点检测的焦点检测器。

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