Spot size detection method is representative method to obtain a focus error digital optical disk storage system.

光斑尺寸法是数字光盘信息存储中的典型聚焦误差探测方法。

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In the development of CCD camera, more than two pieces of CCD should be put into the focal plane of the camera. The focus error would be less than the requirement of design.

在CCD相机的研制工作中，需要将多个CCD安置于CCD相机的焦面位置处，并使各CCD像元之间相对于相机焦面的共焦偏差满足相机设计要求。

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The researchers say this provides a potential explanation for how the brains of humans and animals can quickly and accurately determine focus error without guessing and checking.

研究人员称这可以为人类及动物的大脑不用猜测检测机制却仍能快速精确地确定焦距提供一种可能的解释。

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In this new focus on error-free medicine, hospitals are dropping age-old assumptions that their doctors are doing a good job and instead are measuring performance and issuing report cards.

FORBES: Medical Technology

The error is that the focus is on square footage, not compute capacity per square footage.

FORBES: The Case for the Infinite Data Center

But the 2002 and 2003 champion lost focus early in the second, with her forehand especially error-prone, and Silva grew in confidence as the set progressed, saving a break point to move to 4-4.

BBC: Serena powers into second round