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摘要: xR_]^Get %i.|bIhmm RPC Photonics公司有高品质的的工程漫射体BSDF测试数据,但它对于FRED帮助甚少,下面这个步骤描述了如何利用FRED脚本转换RPC Photonics提供的TXT文件,并将数据直接应用到FRED的Tabulated scatter 散射模型。 T{)!>) `4k;`a 背景: XX6&%7( Thorlabs和RPC Photonics联手共同推出的新型漫射体及光束整形技术,可以解决其他技术的不足,大大改善了诸如光刻系统、有效固态照明,显示,背光,显示亮度增强和投影屏等大多数应用的性能。这项我们称之为工程漫射体(Engineered DiffusersTM)的新概念,与其他技术有许多不同。与诸如磨砂玻璃、乳色玻璃和全息元件等随机漫射体截然不同,工程漫射体要求对于每个散射中心,通常为微透镜单元,都进行控制。例如全息漫射体可以视为一组随机排列的透镜,但是通过全息曝光形成的类透镜效果只能通过静态方式进行控制:而无法单独操控每个微透镜单元,这也帮助解释了全息漫射体无法控制光的分布和轮廓。另一方面,在工程漫射体中,每个微透镜单元形成漫射体,由其凹形纵断面和在阵列中的位置所确定。同时,为了确保漫射体不受输入光束变化的影响,并且不产生衍射效果,微透镜单元的分布是随机的,根据产生相应的光束形状函数所选取的概率分布函数来确定。因此,工程漫射体同时保留了随机与确定性漫射体的优点,从而实现高性能的光束整形功能。 6,@M0CX FRED是美国Photon Engineering 公司开发的光学工程仿真软件,其在杂散光分析中独特的算法、高效的准确性,使其与其它同类产品相比更具优势。本案例我们重点讲述如何由RPC Photonics的BSDF数据转为FRED可识别的散射数据。 hJ}G5pX 图1. RPC Photonics工程漫射体结构及光束投射形状 etTuukq_Z >p<(CVX[ z?
{#/ 步骤 Ix(4<s 5Q%#Z
L/' 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 9&d BL0 il#rdJ1@t 图2. RPC Photonics工程漫射体不同类型的散射数据 W2<X 5' 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) yBl<E$= 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 y.O? c&! 例如下所示: \]9;c6( Sample name: EDF-C1-56 92SB'T> Merging data from file EDF-C1-56 0-0.txt VqbiZOZ@ Finished merging RPC data for sample EDF-C1-56 Etl7V FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt s]I],>}RU 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 PN'8"8`{ a. 创建一个新的散射库 }2\"(_ b. 散射模型命名 #-@{ rgH c. 改变散射模型为“Tabulated BSDF”. -"cN9RF d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) [=9R5.)c e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 $<aBawLZO f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, QqwXFk g. 点击OK `Ch6"=t 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 {[s<\<~B* ScTqnY$v 9V"j=1B} 脚本代码: {$EXI]f 4/h2_
'#Language "WWB-COM" ;T_9;RU<'b !e7vc[N Option Explicit y&CUT:M6 %/^d]# Sub Main -0]aOT-- o}%fs
* 'Cleanup 6
%=BYDF ClearOutputWindow() AzV5Re8M s{IoL_PJP Print "Merging RPC Photonics BSDF Data Files" 7d<v\=J} SetTextColor(255,0,0) cpy"1=K~M Print "Note: Script should be located in the same folder as the BSDF TXT files." kDz.{Ih Print "Note: Do not run this script multiple times without deleting the output file between executions." W+eN%w5 SetTextColor(0,0,0) ]SPB c ~H$XSNPi 'Current directory of this script (should be the same as the text files being merged) C=]3NB>Jc Dim cDir As String e56#Qb@$\ cDir = MacroDir$ & "\" jG2w(h/" Ya_6Zd4O 'Array which will be populated with the list of files to be merged ]lo1Kw Dim fList() As String, curFile As String 4w?7AI]Ej GetFileList( cDir, fList ) w\mF2h ~3%3{aa Print "" g\l;> Print "Files found for merging:" x L BG}C For Each curFile In fList %b?Pasf. Print Chr(9) & curFile }ot _k- Next $W?XxgkB? <oO,CXF 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. (LfVa`<1 Dim nameArray() As String, sampName As String ep?0@5D}] nameArray = Split(fList(0)," 0-0.txt") m7"f6zSo( sampName = nameArray(0) }-vBRY Print "" gfYB|VyWo Print "Sample name: " & Chr(9) & sampName Wk|z\OR( Zb
2 'Open an output file and write the FRED header data /Ow?nWSt Dim outFile As String z(WpOD outFile = cDir & sampName & "_FRED.txt" wgyO% Open outFile For Output As #1 bxN;"{>Xz Print #1, "type bsdf_data" c|R/,/ Print #1, "format angles=deg bsdf=value scale=1" 9PJDT] -1:Z^&e/ 'Loop the file list, skip the two header lines and write the remaining data to file SSXS Dim lineArray() As String, curLine As Long [z~Nw# For Each curFile In fList nADd,|xD3 Print "Merging data from file " & curFile k~R[5W|' ReadFile( cDir & curFile, lineArray ) eqR#` For curLine = 2 To UBound(lineArray) R
u5&xIQ Print #1, lineArray(curLine) =#tQIhX` Next gp HwiFc Next #H`y1zm a%!XLyq 'Close the output file [Mz;:/ Close #1 s]c$]&IGG C6w{"[Wv=X Print "Finished merging RPC data for sample " & sampName }#8uXA Print "FRED formatted data file: " & Chr(9) & outFile #+
'@/5{ n End Sub J7GsNFL gcxk'd 'Utility function to read the contents of a file into an array of strings. 0f^.zt{T Function ReadFile(ByVal fileName As String, _ )0mDN. ByRef lineArray() As String) As Long !P$xh Bs?F*,zDJ ReadFile = -1 L_mqC(vn Dim oFSO As Object 2-0cB$W+ Set oFSO = CreateObject("Scripting.FileSystemObject") }NCvaO Erase lineArray ?vFh)U l;A_Aii( Dim fid As Long BA-nxR If oFSO.fileexists( fileName ) Then ef&@aB fid = FreeFile() j\f$r,4 Open fileName For Input As fid N| Pm|w*? lineArray = Split(Input(LOF(fid), fid), vbCrLf) Q~JKKq Close fid 1`lFF_stkP End If ]Rh(=bg Set oFSO = Nothing t5X
lR]` w Return UBound( lineArray ) }G+A_HF ^ (Fzh1# End Function lM^!^6=v0l HY;?z`= Sub GetFileList( ByVal in_dir As String, _ bU ]N^og^ ByRef in_flist() As String ) [IFRwQ^%_O 4D$sFR|?t 'Redimension the file list array oxQID Erase in_flist WG
!t!1p 4oV_b"xz~ 'Tracks how many files are found ;&6PL]/d Dim fCount As Long _F@p53WE fCount = 0 !9xANSb \Z20fh2 'Recurse directory and search for text files Gr$*t,ZW Dim f As String O6,"#BX f = Dir$(in_dir & "*.txt") n/oipiYx While f <> "" =veOVv[Q&/ ReDim Preserve in_flist(fCount) 9C}aX}` in_flist(fCount) = f :$i:8lz
fCount += 1 v7FRTrqjj f = Dir$() gkML .u Wend H
r^15 ReDim Preserve in_flist(fCount-1) XYHCggy ~}-p5 q2 End Sub @gSFvb bc ^[}0&_L
w OI_/7@L QQ:2987619807 b2X'AHK S
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