-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-12
- 在线时间1894小时
-
-
访问TA的空间加好友用道具
|
摘要: juka0/ h|VeG3H 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。 @SJL\{_ XC0bI,Fu, 背景: #{?PbBE} 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。 %Y<| ;0v 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。 FbaEB RM 图1. RPC Photonics工程漫射体结构及光束投射形状 -Zf@VW,NI Kwefs;<E? Hfwq/Is 步骤 ~$:|VHl q>$ev)W 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。 h{HF8>u[ v 1z 图2. RPC Photonics工程漫射体不同类型的散射数据 \`oT#|0 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) ej4W{IN~: 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 v(B<Nb 例如下所示: +BVym~*^ Sample name: EDF-C1-56 y#Fv+`YDl Merging data from file EDF-C1-56 0-0.txt # {w9s0: Finished merging RPC data for sample EDF-C1-56 'Jt]7;04p FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt W-x?:X<} 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 Gn|F`F a. 创建一个新的散射库 {1V($aBl b. 散射模型命名 QMa;Gy c. 改变散射模型为“Tabulated BSDF”. R:e<W/P" d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) 2z6yn?'&L e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 MBt9SXM f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, ~$iIVJ` g. 点击OK ])|d"[ur= 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 ROg(U8
N 6+.uU[x@ A<5ZF27 脚本代码: i5Zk_-\#H _,xc[ 07 '#Language "WWB-COM" f!oT65Vmi LJk@Vy <? Option Explicit %X4xv_o`f b8V~S'6VqO Sub Main 7ePqmB<. E~%jX
}/ 'Cleanup 0Fk5kGD,&K ClearOutputWindow() 1<BX]-/tP }4Tc Print "Merging RPC Photonics BSDF Data Files" bSfpbo4( SetTextColor(255,0,0) `tHvD=`m. Print "Note: Script should be located in the same folder as the BSDF TXT files." BGOuDKz9C Print "Note: Do not run this script multiple times without deleting the output file between executions." !lf|7 SetTextColor(0,0,0) g .onTFwN mz@T 'Current directory of this script (should be the same as the text files being merged) "}q@Y= Dim cDir As String jX3,c%aQ5e cDir = MacroDir$ & "\" 2"Ecd q*F{/N** 'Array which will be populated with the list of files to be merged $^OvhnL/ Dim fList() As String, curFile As String IhA5Wt0j GetFileList( cDir, fList ) M,/mE~ Fs{x(_LOr Print "" ,_Z5m; Print "Files found for merging:" !G SV6 For Each curFile In fList _AQb6Nb
Print Chr(9) & curFile eZ|%<Wpu Next f0X_fm_q |+iws8xK? 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. @2Z#x Dim nameArray() As String, sampName As String xnmmXtk nameArray = Split(fList(0)," 0-0.txt") 4*Q#0`um sampName = nameArray(0) Y( 3Bp\6 Print "" B$b +Ymu Print "Sample name: " & Chr(9) & sampName AtdlZ .WPV dwV4U 'Open an output file and write the FRED header data 7w'wjX- Dim outFile As String [x9KVd ^d outFile = cDir & sampName & "_FRED.txt" IB[)TZ2m Open outFile For Output As #1 BRlT7grgq Print #1, "type bsdf_data" Pa~)"u8 Print #1, "format angles=deg bsdf=value scale=1" p?B=1vn-2 JBJhG<J 'Loop the file list, skip the two header lines and write the remaining data to file +)y^'Qs Dim lineArray() As String, curLine As Long a"FCZ.O1 For Each curFile In fList lrv3fPIW Print "Merging data from file " & curFile &K.?p2$X ReadFile( cDir & curFile, lineArray ) kuol rfGB For curLine = 2 To UBound(lineArray) MC<PM6w Print #1, lineArray(curLine) S-k8jm Next $lLz3YS Next n}'=yItVL1 $u9K+>. 'Close the output file K Pt5=a Close #1
/% M/ %kdEun Print "Finished merging RPC data for sample " & sampName l y(>8F Print "FRED formatted data file: " & Chr(9) & outFile "tB;^jhRs End Sub F )W: huJ&]"C 'Utility function to read the contents of a file into an array of strings. MhR:c7, Function ReadFile(ByVal fileName As String, _ {vuZ{IJa ByRef lineArray() As String) As Long ch0{+g& #`o2Z ReadFile = -1 %d?cP}V Dim oFSO As Object CbwJd5tk Set oFSO = CreateObject("Scripting.FileSystemObject") R:#k%}W Erase lineArray EJsM(iG]~M k&,~qoU Dim fid As Long oZ!m If oFSO.fileexists( fileName ) Then ;\=M;Zt fid = FreeFile() W3 'q\+ Open fileName For Input As fid `[W[H(AjQ lineArray = Split(Input(LOF(fid), fid), vbCrLf) N7O-2Z * Close fid &ge "x{,? End If =~=*&I4Dp Set oFSO = Nothing C!fMW+C@ Return UBound( lineArray ) Ib+Y~
XYR Bs O+NP End Function 6f\Lf?vF wS%Q<uK Sub GetFileList( ByVal in_dir As String, _ R)mu2^ ByRef in_flist() As String ) 4iKgg[)7`= Y?(r3E^x 'Redimension the file list array 9Hf9VC3 Erase in_flist Q$="_y2cTA QNpqdwu%h 'Tracks how many files are found (=* cK-3 Dim fCount As Long B2C$N0R# fCount = 0 OH">b6>\ ][?G/*k 'Recurse directory and search for text files rvnT6Ve Dim f As String cd$m25CxC f = Dir$(in_dir & "*.txt") i 7x7xtq While f <> "" Fsif6k=4 ReDim Preserve in_flist(fCount) NhaI<J in_flist(fCount) = f xwJH(_- fCount += 1 [Pq}p0cD f = Dir$() FW/W%^ Wend :'~Y ReDim Preserve in_flist(fCount-1) L$IQuy Q\
U:~g3 End Sub aC%m- m
|