numerical aperture

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

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 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；

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；

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。