They offer clearer and sharper images. Many of them also have up to 20x optical zoom lens, a photo mode and fast-action mode.
它们的画质更加清晰分明。其审很多款产品带有高达20倍的光学变焦镜头，并且有照相模式和速拍模式。
2
The coherent output of a LDA has been achieved by a simple EC consisted of a commercial LDA, a fast axis collimation lens and an external mirror.
我们用一个普通的商用LDA、一个快轴准直透镜和一个外腔镜构成的简单外腔实现了LDA的外腔锁相运行。
3
In geometry optics basic content is asks the picture, the paper through to the physical image position relations analysis, obtains the fast judgment lens image formation rule the method.