numerical aperture

Based on results of numerical simulation and requirements of the system on thermal effect and aperture, a reference size for applicable slab was given.

根据数值模拟结果及系统对热效应和通光孔径的要求，给出了实际应用板条的参考尺寸。

The spot shapes at different image plane positions are captured by CCD. The working distance and numerical aperture are then deducted by the data, and compared with the simulation results and design values.

实验测试了不同像面位置的光斑形状，从而得出了样品的工作距和数值孔径等光学参数。并与仿真值、设计值进行了对比。

Direct focusing radially polarized beam with high numerical aperture ( NA) lens can realize optical superresolution.

径向偏振光大数值孔径聚焦可实现光学超分辨。

Numerical Solution of the Limited Aperture Problem in Three-Dimensional Inverse Acoustic Scattering Three dimensional finite element modeling for passive source electromagnetic sounding method

三维有限孔径逆声散射问题的数值解被动源电磁测深三维有限元数值模拟

The dynamic range of volume hologram imaging depends on the hologram diffraction efficiency and the material. The depth resolution depends on the numerical aperture of the objective lens and the thickness of the hologram.

体全息共焦成像的动态范围取决于全息衍射效率和材料的限制，而深度分辨率则取决于物镜的数值孔径和记录介质的厚度大小。

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。

Compared with other UV or DUV lithography lenses, this lens can meet the needs of higher numerical aperture and full use of its field.

该物镜与国内外现有的紫外或深紫外光刻物镜相比，既能满足大数值孔径的需要，又能充分利用物镜的视场。

The numerical simulations in the case of cylinder structure show oscillating wavelength and threshold gain against inside and outside radius of laser, the layer refractive index and pair number of Bragg mirror, thickness, position and oxidized material's refractive index of oxidized aperture, in detail.

对圆柱形结构情况进行了数值模拟，得到了振荡波长、阈值增益随激光器内外半径、Bragg反射镜层折射率、周期数以及氧化孔径层厚度、位置和氧化物折射率的详细变化规律；

It is indicated that the depth of focus of the digital holographic imaging system is not only related with the numerical aperture and the reference wavelength, but also related with the configuration and the offset of reference wave.

指出了数字全息成像系统的焦深不仅与记录时的数值孔径及参考光波长有关，还与具体的光路结构及参考光的偏置有关。

By using a reflective spherical mirror with large numerical aperture, the light scattered by individual particles is collected over a large angular range of 20 ° to 160 °.

散射光收集系统为单一大数值孔径的球面反射镜，其对粒子散射光的收集角范围从20°到160°。

The monofil diameter of the optical fiber luminiferous bundle is 55 μ m. The numerical aperture is 0.6. Ten optical fiber luminiferous bundle uniformly surround the acid solution optical fiber image bundle, which improves the homogeneity and lightness of system.

光纤传光束的单丝直径为55μm，数值孔径为0.6，用10根光纤传光束均匀地分布在酸溶法光纤传像束的周围，提高了系统照明的均匀性和亮度；