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。