-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-11-19
- 在线时间1888小时
-
-
访问TA的空间加好友用道具
|
摘要: }n2-*{)x VhH]n yi7D 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。 >Xh(`^}SQ* ot>EnHfV 背景: rjpafGCp 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。 Kt4\&l-De 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。 u7Y'3x,` 图1. RPC Photonics工程漫射体结构及光束投射形状 %.Tf u0M Y)4Nydq c~L6fvS 步骤 LD~uI ![P(B0Ct/ 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。 OJ_2z|f< CI~;B 图2. RPC Photonics工程漫射体不同类型的散射数据 ev: !,}]w 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) P8,{k 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="&|c=w#L 例如下所示: #Z=)= Sample name: EDF-C1-56 (15Yw9Mv Merging data from file EDF-C1-56 0-0.txt _E&vE5<-$ Finished merging RPC data for sample EDF-C1-56 ?_Dnfa_ FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt 'd.@4 9
4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 ,^+R%7mv a. 创建一个新的散射库 iQ]c
k- b. 散射模型命名 );uZ4PNK/? c. 改变散射模型为“Tabulated BSDF”. %oCjZ"ke 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 ) o4[2`mT 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。 s[B6%DI/5 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, DCt:EhC g. 点击OK ,@>rubUz 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 u<y\iZ[
#c)Ou!Ldb DN8pJa 脚本代码: GY$?^&OO> nog\,NT '#Language "WWB-COM" )p^jsv. CU>K Option Explicit Ae_ E;[mj NX""?"q Sub Main <9@]| hL{B9? 'Cleanup sBXk$ ClearOutputWindow() S7~F*CGBh ~Yz/t Print "Merging RPC Photonics BSDF Data Files" 2#:]%y;\ SetTextColor(255,0,0) iBiA0 W Print "Note: Script should be located in the same folder as the BSDF TXT files." j_WF38o Print "Note: Do not run this script multiple times without deleting the output file between executions." e$^!~+J7 SetTextColor(0,0,0) $}UJs <-F YlcF-a 'Current directory of this script (should be the same as the text files being merged) N
evvA(M Dim cDir As String q\HBAry cDir = MacroDir$ & "\" L{0OMyUA T17LYHIT 'Array which will be populated with the list of files to be merged 8`~3MsE" Dim fList() As String, curFile As String 5NF&LM;i( GetFileList( cDir, fList ) oplA'Jgnv rU^ghF Print "" W>|b98NPu Print "Files found for merging:" iM/0Yp-v'> For Each curFile In fList Isgk Print Chr(9) & curFile x[>_I1TJ Next 8(f0|@x^ K
y4y 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. p;t!"I:`? Dim nameArray() As String, sampName As String dDn4nwH nameArray = Split(fList(0)," 0-0.txt") }~CZqIP sampName = nameArray(0) qf=[*ZY Print "" f>+}U;)EF Print "Sample name: " & Chr(9) & sampName RHAr[$ x-#9i 'Open an output file and write the FRED header data R"t$N@ZFb Dim outFile As String Xsn - +e outFile = cDir & sampName & "_FRED.txt" bfI -!, Open outFile For Output As #1 f-nC+ Print #1, "type bsdf_data" %dU'$) Print #1, "format angles=deg bsdf=value scale=1" kZ[yv WI!z92qq[ 'Loop the file list, skip the two header lines and write the remaining data to file j6HbJ#] Dim lineArray() As String, curLine As Long +,^M{^% For Each curFile In fList r=||sZs Print "Merging data from file " & curFile *Z2Q]?:{
i ReadFile( cDir & curFile, lineArray ) fvM3.P For curLine = 2 To UBound(lineArray) molowPI Print #1, lineArray(curLine) :RO:k|g Next 1V3J:W#; Next *g41"Cl *3
8Y;{ 4 'Close the output file >T^v4A Close #1 ZWW8Hr Msu2OF *x Print "Finished merging RPC data for sample " & sampName <~X6D? Print "FRED formatted data file: " & Chr(9) & outFile `oWjq6 End Sub nJ})6/gK 1p<?S}zg@ 'Utility function to read the contents of a file into an array of strings. <\~#\A=; Function ReadFile(ByVal fileName As String, _ iC+H;s5< ByRef lineArray() As String) As Long |M>k &p,B- knzED~v@( ReadFile = -1 OYp8r Dim oFSO As Object 3}1+"? s Set oFSO = CreateObject("Scripting.FileSystemObject") B[|/wHMsT} Erase lineArray ZDmk<}A-U BvR3Oi@Wc Dim fid As Long j77}{5@p If oFSO.fileexists( fileName ) Then v~cW:I fid = FreeFile() L [M8[~Hy Open fileName For Input As fid WA5kX SdIb lineArray = Split(Input(LOF(fid), fid), vbCrLf) 3'e 4{ Close fid =xet+;~ji End If {o<p{q Set oFSO = Nothing #p`7gFl Return UBound( lineArray ) QaBXzf
/iuNdh End Function A3pQ?d[ @}!$NI8 Sub GetFileList( ByVal in_dir As String, _ qM !q,Q ByRef in_flist() As String ) \^LR5S& kP@OIhRe 'Redimension the file list array |?=1tS{iT Erase in_flist S
IK{GWX '+zsj0!A 'Tracks how many files are found }PL Dim fCount As Long {Dq51 fCount = 0 P`"DepeD ]m>MB )9 'Recurse directory and search for text files d`7] reh Dim f As String 3*JybMo" f = Dir$(in_dir & "*.txt") (Fd4Gw<sq While f <> "" 5&@ U T ReDim Preserve in_flist(fCount) ScKfr in_flist(fCount) = f p<19 Jw< fCount += 1 hI{Yg$H1 f = Dir$() L"/ato Wend
m:Abq`C ReDim Preserve in_flist(fCount-1) (Z +C k8V0-.UL} End Sub gNQJ:!
|