作者: liuxingwei 时间: 2007-10-9 21:00 标题: 回复 #4 sophiya 的帖子 Material Name: Alum 1 date point(s)
Wave length Index Extinction
0.55 0.82 -5.99
这里的1 date points， index和 extinction 是什么意思？作者: sophiya 时间: 2007-10-10 10:19 标题: 回复 #6 liuxingwei 的帖子 这里data points是指的有多少个数据，index是指材料的折射率，extinction是指材料的消光系数。
有关消光系数这里有一段说明你可以参考一下：
extinction coefficient
The parameter used to describe the interaction of electromagnetic radiation with matter is the complex index of refraction, ñ, which is a combination of a real part and an imaginary part.
ñ=n-ik
Here, n is also called 'index of refraction' which sometime leads to confusion, and k is called the 'extinction coefficient'. In a dielectric material such as glass, none of the light is absorbed and therefore k = 0.
Before a more detail definition of the extinction coefficient k is considered, let us first look at the absorption coefficient α. In a medium absorbing light, the decrease in intensiry I per unit lenght z is proportional to the value of I. In mathematical form this means:
dI(z)/dz=-αI(z)
where α is the absorption coefficient.
This can be integrated as:
I(z)=Io*exp(-αz)
where I0 is the value of the intensity at the surface of the absorbing medium.
The extinction coefficient k is then defined as:
k=λα/4π
where λ is the vacuum wavelength作者: sophiya 时间: 2007-10-10 10:25
Zemax 的 coating/material listing主要分三个部分，第一部分是对材料不同波长下的折射率和消光参数的定义，第二部分是对膜层名称的材料和厚度的定义，第三部分是对一些特殊情况下理想膜层反射、折射和吸收率的定义。如：50%折射50%反射的表面，等。
所以我之前说的不是根据反射率来设置也不对。作者: liuxingwei 时间: 2007-10-10 16:42
再次非常感谢sophiya的细心指导,让小弟学到好多.望以后多多交流!作者: liuxingwei 时间: 2007-10-10 16:53
Coating Name: PASS_P (IDEAL)
S-Polarization:
T, tr, ti: 0.00000000 0.00000000 0.00000000
R, rr, ri: 1.00000000 1.00000000 0.00000000
A: 0.00000000
P-Polarization:
T, tr, ti: 1.00000000 1.00000000 0.00000000
R, rr, ri: 0.00000000 0.00000000 0.00000000
A: 0.00000000
This coating adds a pi phase shift upon reflection from low to high index.
Coating Name: PASS45 (TABLE)
Angle: 0.00000000
: Wavelength Rs Rp Ts Tp ARs ARp ATs ATp
: 0.550000 1.000000 1.000000 0.000000 0.000000
Angle: 45.00000000
: Wavelength Rs Rp Ts Tp ARs ARp ATs ATp
: 0.550000 0.000000 0.000000 1.000000 1.000000
Angle: 90.00000000
: Wavelength Rs Rp Ts Tp ARs ARp ATs ATp
: 0.550000 1.000000 1.000000 0.000000 0.000000
This coating adds a pi phase shift upon reflection from low to high index.