This is the application of depth of focus.

在摄影中总是不能娴熟地加以运用。

Exposure energy, improvement of resolution and depth of focus are compared with that of conventional condition.

主要就曝光能量，分辨力改善情况，焦深变化等与传统情况作了比较。

Placing a diffractive optical element(DOE) on the incident laser beam to improve the depth of focus, the DOE'S aperture is variable.

在入射光束的孔径受限制的情况下，利用衍射光学元件来增加激光束的焦深。

It makes the central maximum in the Airy pattern narrower and increases the depth of focus. Calculation results have shown that this kind of apodizer is superior to the phase-shifting apodizer.

模拟计算结果表明，在中心峰值强度相等的条件下，用该器件所获得的超分辨效果比目前最好的纯相位型超分辨光阑要好。

To borrow a term from the visual arts, Franzen's writing has an enviable depth of field: it keeps a great deal in focus simultaneously.

借用视觉艺术中的一个术语，弗兰岑的小说有一种令人艳羡的视角深度：它同时关注许多方面。