It can obtain the feature point information of measured object directly and improve the measuring efficiency.

通过液晶光栅编码可以直接获得被测物体形貌特征点信息，提高了测量速度和效率。

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The electrical tomography technology is a kind of imaging technology, which uses the electro-characteristic of the measured object.

电成像技术是一种利用被测物场电特性进行成像的技术。

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Grating is placed in image space of objective lens, and used as the shearing part. Light wave from reference object and measured object interfered at the image space.

它在成像物镜的像方空间放置光栅，利用光栅的衍射原理，使来自参考物和被测物的光波在像面发生干涉。

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The size of an object in space has been traditionally measured by looking at how much sunlight is reflected from it.

BBC: Asteroid thought to kill dinosaurs may not be guilty