A new method of measuring eccentricity of rotary turntable by means of optical heterodyne is described.

本文介绍了一种利用光外差测量原理测量旋转转盘偏心距的新方法。

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The composition and microstructure of the failed copper alloy tube in a condenser were studied by means of optical microscope and EMPA.

用电子探针、光学显微镜对电厂凝汽器泄漏铜管的成分、组织、微区元素分布进行分析。

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The speciation of silver in the lead concentrates were analyzed by means of optical microscope and electron probe micro-analyser (EPMA).

利用光学显微镜、电子探针对铅精矿中银的赋存状态进行了分析。

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To keep the price down, that often means their optical performance is compromised and the choice of focal lengths limited.

ECONOMIST: A die-hard analog photographer goes digital