-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-04-02
- 在线时间1761小时
-
-
访问TA的空间加好友用道具
|
摘要: 'Y&yt"cs PD/~@OsxU 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。 ]gmf%g'C WV&BZ:H 背景: L50`,,WF 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。 O%+:fJz6wI 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。 vb70~k 图1. RPC Photonics工程漫射体结构及光束投射形状 S$$:G$j U2Ur N?T @:c
1+ 步骤 jf$t zD?$O7
|ZK 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 [M;P:@ 5T;_k'qe 图2. RPC Photonics工程漫射体不同类型的散射数据 }& 1_gn15 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) cAiIbh>c 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 1-qQp.Wj 例如下所示: Az)P&*2:'` Sample name: EDF-C1-56 0`S!+d Merging data from file EDF-C1-56 0-0.txt |H@M- Finished merging RPC data for sample EDF-C1-56 aFC3yMKXh FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt =ecv;uu2 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 ]T*{M a. 创建一个新的散射库 i3Ffk+ |b b. 散射模型命名 {QhvHV c. 改变散射模型为“Tabulated BSDF”. Z,d/FC#y( d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) .:lzT"QXI e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 O&O1O>[p1 f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, Q%
dpGI g. 点击OK Ik}*7D 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 |MBnRR #~#_)\l'F ;nC+Kz: 脚本代码: c~tkY!c t^7R6y '#Language "WWB-COM" kQH!`-n:T Dgkt-:S/T| Option Explicit t>25IJG ^QnVYTM Sub Main Xajjzl\b tq*Q|9j7VG 'Cleanup ,)Q mQ^/ ClearOutputWindow() ]-AT(L>
g`Rs; Print "Merging RPC Photonics BSDF Data Files" fN K~z* SetTextColor(255,0,0) wo_FM
`@ Print "Note: Script should be located in the same folder as the BSDF TXT files." ,:v}gS?Uq Print "Note: Do not run this script multiple times without deleting the output file between executions." Us%VBq SetTextColor(0,0,0) >Ek`PVPD prm 'Current directory of this script (should be the same as the text files being merged) bqe;) A7 Dim cDir As String vw(};)8 cDir = MacroDir$ & "\" JTb<uC (nc fR 'Array which will be populated with the list of files to be merged Q2NS> [ Dim fList() As String, curFile As String =*(d+[_ GetFileList( cDir, fList ) w?5b: W, #h&?wE> Print "" s/T5aJR Print "Files found for merging:" Ti'O 2k For Each curFile In fList PNKmI Print Chr(9) & curFile 1/{:}9Z@ Next cKxJeM07 RSnK`N\9jb 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. ("TI~ Dim nameArray() As String, sampName As String '!Sj]+ nameArray = Split(fList(0)," 0-0.txt") `#(4K4]1. sampName = nameArray(0) &=/.$i-w$ Print "" @
J"1!` Print "Sample name: " & Chr(9) & sampName UtWoSFZ'o! m.$Oo
Mu' 'Open an output file and write the FRED header data [lnN~#(Y Dim outFile As String $:xUXEi{ outFile = cDir & sampName & "_FRED.txt" 6iTDk Open outFile For Output As #1 %
,X(GwX Print #1, "type bsdf_data" N2~z&y8. Print #1, "format angles=deg bsdf=value scale=1" c^=:]^ kO5KZ;+N- 'Loop the file list, skip the two header lines and write the remaining data to file B02~/9*Y" Dim lineArray() As String, curLine As Long 9S<W~# zz For Each curFile In fList <D 5QlAN Print "Merging data from file " & curFile hrW.TwK ReadFile( cDir & curFile, lineArray ) Zkz:h7GUG- For curLine = 2 To UBound(lineArray) HD`%Ma
Yhc Print #1, lineArray(curLine) .6tz ^4 Next :*8@MjZ4 Next `hfwZ*s "RG.vo7b 'Close the output file vw!i)JO8M Close #1 ~f@;. 7O{\^Jz1 Print "Finished merging RPC data for sample " & sampName |[: `izW Print "FRED formatted data file: " & Chr(9) & outFile "2;UXX-H End Sub J:Qp(s-N^: :wF(([&4p! 'Utility function to read the contents of a file into an array of strings. ' 1mygplW Function ReadFile(ByVal fileName As String, _ i|=XW6J% ByRef lineArray() As String) As Long ZWr\v!4 sn*s7v: ReadFile = -1 C{'c_wX Dim oFSO As Object
+FJ
o!~1 Set oFSO = CreateObject("Scripting.FileSystemObject") jK{CjfCNz Erase lineArray !",@,$ f{+8]VA Dim fid As Long MBg^U<t8 If oFSO.fileexists( fileName ) Then +I/P5OGRN fid = FreeFile() [oYe/<3 Open fileName For Input As fid w
S;(u[W lineArray = Split(Input(LOF(fid), fid), vbCrLf) qS7*.E~j|] Close fid sX=!o})0 End If crmnh4- Set oFSO = Nothing SC!IQ80H#D Return UBound( lineArray ) 7IvCMb&%R PffwNj/l End Function GRs ;-Jt d }]b Sub GetFileList( ByVal in_dir As String, _ E+Gea[c ByRef in_flist() As String ) {1qEN_ERx pGOS'.K%t8 'Redimension the file list array S#""((U$ Erase in_flist 5H',Bm4- }??q{B@v 'Tracks how many files are found k4`v(au^ Dim fCount As Long <fyv^e fCount = 0 =N3~2=g~A `&+L/ 'Recurse directory and search for text files P]y5E9 k Dim f As String ,= PDL f = Dir$(in_dir & "*.txt") 'fgDe While f <> "" %k2zsM ReDim Preserve in_flist(fCount) ,CvU#ab8$ in_flist(fCount) = f -Zw"o> fCount += 1 q6,xsO,+ f = Dir$() 6Z'zB&hM} Wend @hv9=v+ ReDim Preserve in_flist(fCount-1) |, :(3Ml w68qyG|wM End Sub ?Jma^ S
|