-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-04-23
- 在线时间1766小时
-
-
访问TA的空间加好友用道具
|
摘要: ]'q<wPi DVl:s 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。 Xk$lQMwZ i}19$x.D` 背景: 9':$!Eoq 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。 T_WQzEL^ 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。 ?x97q3I+] 图1. RPC Photonics工程漫射体结构及光束投射形状 L;[*F-+jD S SXSgp $BY{:#a] 步骤 O]>`B{ j*{bM{~T< 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 YaU A}0cW XvdhPOMy 图2. RPC Photonics工程漫射体不同类型的散射数据 @w0[5ZAj 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) ZE^de(Fm 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 %#,BvQz~ 例如下所示: xcig'4L Sample name: EDF-C1-56 _,^sI% Merging data from file EDF-C1-56 0-0.txt H &JKja}` Finished merging RPC data for sample EDF-C1-56 DYS(ZY)4 FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt |zMQe}R@% 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 !NCT) #G` a. 创建一个新的散射库 HD ~9EK~ b. 散射模型命名 qU}DOL| c. 改变散射模型为“Tabulated BSDF”. 4]bT O d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) E !8y|_(j e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 IjNm/${$ 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, AZa3!e/1 g. 点击OK T*IudxW 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 MD7[}cB }/VHeHd |Xag:hof 脚本代码: ?P5D!b:( X'c5s~9 '#Language "WWB-COM" { at;
U@o C\{4<:<_& Option Explicit ,J|};s+ HZT;7< Sub Main NQG"}=KA bbJa,}R 'Cleanup vzw\f ClearOutputWindow() sR6(8 `Ao:} Print "Merging RPC Photonics BSDF Data Files" t]x HM SetTextColor(255,0,0) ;Y"J j Print "Note: Script should be located in the same folder as the BSDF TXT files." 1pV"<,t Print "Note: Do not run this script multiple times without deleting the output file between executions." C$bK!]a SetTextColor(0,0,0) DB0xIP~i,? /Yh8r1^2tZ 'Current directory of this script (should be the same as the text files being merged) ^tah4QmUA Dim cDir As String 3
*G=U cDir = MacroDir$ & "\" -K
jCPc Pc3u`Q L? 'Array which will be populated with the list of files to be merged =4zsAa Dim fList() As String, curFile As String L4NC- GetFileList( cDir, fList ) 8X%;29tow P
,i)A Print "" U0rz 4fxc Print "Files found for merging:" pQp}HD!- For Each curFile In fList J.-#:OZ Print Chr(9) & curFile pk/#+r; Next -l\@50,D M;(lc?Rv 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. eN$~@'w Dim nameArray() As String, sampName As String B0Z@ Cf nameArray = Split(fList(0)," 0-0.txt") 4nY2v['m0 sampName = nameArray(0) =3"Nn4Z Print "" j.z#fU Print "Sample name: " & Chr(9) & sampName 6+It>mnR
;02lmpBj 'Open an output file and write the FRED header data @ +7'0[y? Dim outFile As String %=]{~5f> outFile = cDir & sampName & "_FRED.txt" 1t)6wk
N Open outFile For Output As #1 >$?Z&7Lv Print #1, "type bsdf_data" EgY]U1{ Print #1, "format angles=deg bsdf=value scale=1" [J^,_iN[. {>z.y1 'Loop the file list, skip the two header lines and write the remaining data to file u4S3NLG) Dim lineArray() As String, curLine As Long &8;mcM//4 For Each curFile In fList qg>i8V Print "Merging data from file " & curFile M6e"4Gh ReadFile( cDir & curFile, lineArray ) t Sg#2 For curLine = 2 To UBound(lineArray) &pCKz[Yf+ Print #1, lineArray(curLine) ';1
c Next I@hC$o Next snyx$Qx( =v_ju;C= 'Close the output file RH`m=?~J, Close #1 WaHTzIa[ =3}+f-6"' Print "Finished merging RPC data for sample " & sampName G q8/xxt Print "FRED formatted data file: " & Chr(9) & outFile 7
724,+2N End Sub 04(h!@!g: ZQyT$l~b 'Utility function to read the contents of a file into an array of strings. 3*FktXmI} Function ReadFile(ByVal fileName As String, _ 9oaq%Sf ByRef lineArray() As String) As Long N%T-Q9k @p!["v& ReadFile = -1 `xtN+y F Dim oFSO As Object jReI+
pS Set oFSO = CreateObject("Scripting.FileSystemObject") o?b"B+# Erase lineArray i} q6^;uTF [0 W^|=#K Dim fid As Long qOng?(I If oFSO.fileexists( fileName ) Then P[Qr[74) fid = FreeFile() u^{Q|o:=x Open fileName For Input As fid A$-{WN.W lineArray = Split(Input(LOF(fid), fid), vbCrLf) 9_HEImk Close fid [*1c.&%( End If QZDGk4GG Set oFSO = Nothing B a Xzz Return UBound( lineArray ) p>MX}^6 'dx4L }d End Function wPV`j:?' @]OI(B Sub GetFileList( ByVal in_dir As String, _ C~l5D4D# ByRef in_flist() As String ) {xOu*8J <1hwXo 'Redimension the file list array ZI5UQH/ Erase in_flist <q_H 3| 3 \kT#nr 'Tracks how many files are found {8t;nsdm! Dim fCount As Long [V1gj9t=, fCount = 0 f(9w FT +|o-lb 'Recurse directory and search for text files Ir]b.6B Dim f As String `5>IvrzXrK f = Dir$(in_dir & "*.txt") Bw{W-&$o While f <> "" 0V1kZ. ReDim Preserve in_flist(fCount) uz*C`T0:rj in_flist(fCount) = f 8^M5u>=t; fCount += 1 \Ud2]^D= f = Dir$() Va9vDb6 Wend :S,#*rPKBK ReDim Preserve in_flist(fCount-1) Q9rE_}Z $bD!./fl End Sub X5)>yM^N`
|