为了解决现有坐标测量机中的单目显微视觉测头视场小和景深小的缺点，提出了显微视觉测头的动态测量方法。

A dynamic measurement technology is designed in order to dispose of imperfection that is small field of view and small depth of field of monocular micro-vision probe.

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一个大洞的开启(小f值)会带给你浅度景深，而一个小的开启(大f值)则会给你一个深度景深。

A large opening (small f-stop number) gives you a very shallow DOF, and a small opening (big f-stop number) gives you a much deeper DOF.

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人像模式用一个大光圈(f值小)，而让景深(清晰对焦的那部分)变小。

Portrait mode chooses a large aperture (a small 'f' number) which will make the depth of field (the amount of your shot in focus) smaller.

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