objective aperture

applying the electron-diffractive mode of transmission electron microscope ( tem), an objective aperture with a proper diameter was used to select the diffractive area of non-crystal sio_2 for taking the dark field images of sio_2-cladding nano-caco_3, produced by the sol-gel method.

在透射电子显微镜（TEM）电子衍射模式下，用适当孔径的物镜光阑选择非晶态SiO2的衍射区域，拍摄以溶胶-凝胶法制备的SiO2包覆纳米CaCO3的暗场像。

互联网摘选

Furthermore, the larger the numerical aperture of the objective, the less the effect of the slant angle on the line image shape.

物镜的数值孔径越大，倾角对线结构成像的影响越小。

互联网摘选

design of a fore-optical objective with large relative aperture for spectral imagers

一种大相对孔径成像光谱仪前置物镜设计

互联网摘选

the highly focused laser beam was obtained by use of the objective with high numeric aperture, and the fluctuant fluorescence signals were collected by a sensitive single photon counting module.

采用高数值孔径物镜使激光束高度聚焦，并用同一物镜收集样品的荧光，单光子计数器用于实时记录荧光信号。

互联网摘选