-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2026-09-04
- 在线时间1983小时
-
-
访问TA的空间加好友用道具
|
摘要: ]J<2a`IK! j?!BHNs 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。 Ql~9a
[8T~ rByC6HV" 背景: 2|="!c8K 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。 ^ ]nnvvp 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。 Vz=ByyC 图1. RPC Photonics工程漫射体结构及光束投射形状 um/2.Sn> Z0o+&3a6 z^@.b 步骤 2oY.MQD7iW (_:k s 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。 &G#LQl CcF$?07 i 图2. RPC Photonics工程漫射体不同类型的散射数据 XctSw 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) +w'"N 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 *,C[yg1P 例如下所示: *t_"]v-w Sample name: EDF-C1-56 $!~R'N c Merging data from file EDF-C1-56 0-0.txt #Az#dt]H Finished merging RPC data for sample EDF-C1-56 BQ X6Q< FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt
%[1\d) 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 XUI9)Ne a. 创建一个新的散射库 N)F&c!anh b. 散射模型命名 pKSn
3-A c. 改变散射模型为“Tabulated BSDF”. ;3 N0) d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) 4r'QP .h e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 "6[a%f#Q f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, Y|'0bujr g. 点击OK ll]MBq 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 4CUoXs' yH\3*#+ +[LG> 脚本代码: &E{CQ#k uL\b*rI '#Language "WWB-COM" Xv1SRP# &m=GkK Option Explicit y.xt7
F1 c"nowbf Sub Main % oPt],> FU{$oCh/5 'Cleanup 0_!')+ ClearOutputWindow() VR8 kY& vbo|q[z Print "Merging RPC Photonics BSDF Data Files" 8R3x74fL SetTextColor(255,0,0) 2)iwAu
Print "Note: Script should be located in the same folder as the BSDF TXT files." 6MewQ{h i Print "Note: Do not run this script multiple times without deleting the output file between executions." xz$-_NWW SetTextColor(0,0,0) UN
FQ`L qocN:Of1 'Current directory of this script (should be the same as the text files being merged)
11'^JmKA Dim cDir As String &dH[lB cDir = MacroDir$ & "\" jOkc' `Z#0kpXk_ 'Array which will be populated with the list of files to be merged \
F\ /< Dim fList() As String, curFile As String I]4L0r- GetFileList( cDir, fList ) 2HNAB4E n7|8`?R^ Print "" [~aRA'qJ{V Print "Files found for merging:" t!=qt* For Each curFile In fList 6`c5\G+ Print Chr(9) & curFile B4D#TlB Next 8vp*U KT4h3D`, 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. Bf21u9 Dim nameArray() As String, sampName As String 9}[UZN6 nameArray = Split(fList(0)," 0-0.txt") G!u+~{g sampName = nameArray(0) *]7$/%.D Print "" Jbv[Ql# Print "Sample name: " & Chr(9) & sampName `{Jo>L. <UEta>jj 'Open an output file and write the FRED header data (&B`vgmb Dim outFile As String
&H4Y`xV^= outFile = cDir & sampName & "_FRED.txt" Nv~H797B Open outFile For Output As #1 u~C,x3yr Print #1, "type bsdf_data" W0I)< S Print #1, "format angles=deg bsdf=value scale=1" qxQuXF>:# kS7`g A 'Loop the file list, skip the two header lines and write the remaining data to file <dD)>Y. Dim lineArray() As String, curLine As Long *=2sXH1j For Each curFile In fList |zkZF|- Print "Merging data from file " & curFile up@I,9C/ ReadFile( cDir & curFile, lineArray ) /q^\g4J For curLine = 2 To UBound(lineArray) u_Wftb?9 Print #1, lineArray(curLine) %tE#%;Z Next *QGyF`Go{ Next 0Ym_l?]m[ ;4'pucq5/ 'Close the output file m]?C @ina Close #1 "c5bz T2dv!}7p Print "Finished merging RPC data for sample " & sampName lz [s Print "FRED formatted data file: " & Chr(9) & outFile !U"?vS l End Sub (-[73v-w \C}_l+nY 'Utility function to read the contents of a file into an array of strings. n/6qc3\5i Function ReadFile(ByVal fileName As String, _ ubQbEv{(, ByRef lineArray() As String) As Long *}P=7TuS S]x\Asj;w ReadFile = -1 ls@j8bVv^ Dim oFSO As Object JQ%D6b Set oFSO = CreateObject("Scripting.FileSystemObject") V{{Xz: Erase lineArray &cSZ?0R _/5#A+ ? Dim fid As Long s L=}d[ If oFSO.fileexists( fileName ) Then 9 S4bg7 fid = FreeFile() ccY! OSae Open fileName For Input As fid 8W2oGL6 lineArray = Split(Input(LOF(fid), fid), vbCrLf) NVX @1} Close fid BW x=Q End If \|YIuzlO4 Set oFSO = Nothing J=t@2 Return UBound( lineArray ) mHF?t.y '/'dg5bfV End Function -(lCM/h EXEB A&* Sub GetFileList( ByVal in_dir As String, _ "j/jhe6 ByRef in_flist() As String ) w(oi6kg $]<wQH/?_ 'Redimension the file list array sW&5Mu- Erase in_flist x~u"KU2B LEC=@) B 'Tracks how many files are found WD >z Dim fCount As Long O8k+R@ fCount = 0 @q"HZO[ cd(YH! 3 'Recurse directory and search for text files yi;pn Z Dim f As String s3[\&zt f = Dir$(in_dir & "*.txt") ez14f$cJ+ While f <> "" 85_Qb2<'r ReDim Preserve in_flist(fCount) dT7!+)s5- in_flist(fCount) = f [.'9Sw fCount += 1 2C AR2V| f = Dir$() uE,g|51H/ Wend ~X<?&;6 ReDim Preserve in_flist(fCount-1) Yy'CBIq#f (>SucUU End Sub P?hB`5X PJL
[En* ]@uuB\u QQ:2987619807 4x-K0
|