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sophiaxyang

2012-01-19 17:23

应该选择哪种内建模型（散射模型）来模拟玻璃diffuser的表面？

请教各位GGJJ，
我想用zemax的非序列模式仿真玻璃diffuser的透射及反射场。
我用的是thorlabs ground glass diffuser,技术参数如下：
Material: N-BK7 (Uncoated)Scratch-Dig: 80-50Clear Aperture: >90% DiameterPolished Side Surface Irregularity: <4λGaussian Intensity Profile120, 220, 600, or 1500 grit
请问是否可以使用zemax的内建散射模型？如果可以，应该使用哪一种？谢谢！！

Built-in scattering models
Lambertian
BSDF = 1/p

The scattered ray projection vector has equal probability anywhere on the projected plane
The scattered intensity varies like cos(q_s)
The scattered intensity is independent of the incident angle

Gaussian
BSDF(x) = A*exp[-|x|²/s²]

The scattering distribution is symmetric in direction cosine space
s determines the width of the Gaussian distribution on the projected plane
Maximum value allowed for s is 5 (for s > 5, distribution is nearly Lambertian)

ABg
BSDF(x) = A/[B + |x|^g]

Widely used to model scattering due to random isotropic surface roughness
Input values for A, B, and g are provided in an ASCII file (in the <data>\ABg_Data\ directory)
Input value limitations: A >= 0, B >= 1.0E-12 (unless g = 0, then B = 0 is allowed)

mang2004	2012-01-20 02:37
楼主， -zd*tujx 从diffusion power vs. angle 曲线看，朗伯散射模型是不合适的，考虑用高斯和ABg散射模型更现实。 hb"t8_--c 如需要具体模型参数，请告知。 xh\{ dUPA 祝成功！ +?~'K&@ MANG2004 \z<B=RT\

懒懒的天	2012-02-29 11:47
mang2004:楼主， r:y*l4 从diffusion power vs. angle 曲线看，朗伯散射模型是不合适的，考虑用高斯和ABg散射模型更现实。 /!UuGm 如需要具体模型参数，请告知。 O9]j$,i 祝成功！ r+0"1\f3 MANG2004 7Rj!vj/ ....... (2012-01-20 02:37) [syuoJ Y2j>lf?8 同求ABg模型具体参数一份!感谢版主大大！

mxchen	2012-03-16 18:36
学习学习

woshine123	2016-05-25 22:22
mang2004:楼主， WhSQ>h!@s 从diffusion power vs. angle 曲线看，朗伯散射模型是不合适的，考虑用高斯和ABg散射模型更现实。 jio1#& 如需要具体模型参数，请告知。 -Uq I=# 祝成功！ Tm_AoZH MANG2004 RERum ....... (2012-01-20 02:37) Jj\|HeZ1C f n%3rv?m7 同求ABg模型具体参数一份~~感谢版主~~O(∩_∩)O谢谢。我的邮箱私信给您哈

yczemax	2018-07-19 23:06
学习，厉害厉害厉害了

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