-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-08
- 在线时间1893小时
-
-
访问TA的空间加好友用道具
|
摘要: miZ&9m 9n"D/NZB 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。 m [FH> xTW$9>@\m 背景: ca1A9fvo Thorlabs和RPC Photonics联手共同推出的新型漫射体及光束整形技术,可以解决其他技术的不足,大大改善了诸如光刻系统、有效固态照明,显示,背光,显示亮度增强和投影屏等大多数应用的性能。这项我们称之为工程漫射体(Engineered DiffusersTM)的新概念,与其他技术有许多不同。与诸如磨砂玻璃、乳色玻璃和全息元件等随机漫射体截然不同,工程漫射体要求对于每个散射中心,通常为微透镜单元,都进行控制。例如全息漫射体可以视为一组随机排列的透镜,但是通过全息曝光形成的类透镜效果只能通过静态方式进行控制:而无法单独操控每个微透镜单元,这也帮助解释了全息漫射体无法控制光的分布和轮廓。另一方面,在工程漫射体中,每个微透镜单元形成漫射体,由其凹形纵断面和在阵列中的位置所确定。同时,为了确保漫射体不受输入光束变化的影响,并且不产生衍射效果,微透镜单元的分布是随机的,根据产生相应的光束形状函数所选取的概率分布函数来确定。因此,工程漫射体同时保留了随机与确定性漫射体的优点,从而实现高性能的光束整形功能。 z@3t>k|K FRED是美国Photon Engineering 公司开发的光学工程仿真软件,其在杂散光分析中独特的算法、高效的准确性,使其与其它同类产品相比更具优势。本案例我们重点讲述如何由RPC Photonics的BSDF数据转为FRED可识别的散射数据。 O=PyXOf 图1. RPC Photonics工程漫射体结构及光束投射形状 Q<V?rPAcx ;'r} D!8w/ R1X{=ct 步骤 Yvu!Q U_HOfix 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 n`krK"Ii -&*
4~ 图2. RPC Photonics工程漫射体不同类型的散射数据 C&m[/PJ~l 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) q}#4bB9 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 gzthM8A 例如下所示: L}1|R*b Sample name: EDF-C1-56 ;|f|d?Q\ Merging data from file EDF-C1-56 0-0.txt j\D_Z{m2 Finished merging RPC data for sample EDF-C1-56 *94<rlh{"
FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt W"_")V=QBz 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 OFTyN^([@ a. 创建一个新的散射库 ljTnxg/?
W b. 散射模型命名 {re<S<j& c. 改变散射模型为“Tabulated BSDF”. p] V d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) %(,Kj
~0 e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 ;{79d8/= f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, Yp1;5Bbp g. 点击OK I]|X6 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 "RH pj3 si Pvq74?an` 9"3 7va 脚本代码: fWKI~/eUY| Ccld;c&+ '#Language "WWB-COM" ua%$r[ +pcpb)VL Option Explicit RjY(MSc @-9I<)Z/2 Sub Main ykv,>nSXLL W *t+!cU/: 'Cleanup z
%Ty; ClearOutputWindow() dC$z q~q `;yfSoY Print "Merging RPC Photonics BSDF Data Files" 9K`(Ys& SetTextColor(255,0,0) {;6Yi! Print "Note: Script should be located in the same folder as the BSDF TXT files." "&s9;_9 Print "Note: Do not run this script multiple times without deleting the output file between executions." B zmmE2~* SetTextColor(0,0,0) x w8
e G=R`O1-3 'Current directory of this script (should be the same as the text files being merged) roDE?7x1 Dim cDir As String -\OvOkr cDir = MacroDir$ & "\"
Em?Z ~)XyrKw 'Array which will be populated with the list of files to be merged 3":vjDq$ Dim fList() As String, curFile As String y3^<rff3Gc GetFileList( cDir, fList ) uOzol~TU) 50#iC@1 Print "" ;x/do?FbT Print "Files found for merging:" [ZC{eg+D For Each curFile In fList +yvtd]D$2W Print Chr(9) & curFile + niz(] Next cn62:p]5 s9R#rwIc 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. "]1 !<M6\i Dim nameArray() As String, sampName As String -?_#Yttu nameArray = Split(fList(0)," 0-0.txt") &\8qN_` sampName = nameArray(0) 7>#?-, B Print "" $#VE C0 Print "Sample name: " & Chr(9) & sampName TI^W=5W@@ v?Z30?_&h 'Open an output file and write the FRED header data cR'l\iv+ Dim outFile As String i2]7Bf)oV outFile = cDir & sampName & "_FRED.txt" }HB>Zb5 Open outFile For Output As #1 z'=8U@P'# Print #1, "type bsdf_data" z l?Gd4 Print #1, "format angles=deg bsdf=value scale=1" 87; E#2 gEghDO_G 'Loop the file list, skip the two header lines and write the remaining data to file kiYHJ\a Dim lineArray() As String, curLine As Long -|0nZ For Each curFile In fList vO>Fj Print "Merging data from file " & curFile "DN0|%`M/ ReadFile( cDir & curFile, lineArray ) 6_Ps*Ed For curLine = 2 To UBound(lineArray) Gw!VPFV>W Print #1, lineArray(curLine) ENZjRf4 Next =E6ND8l@2 Next <v&L90+s\; 2/Xro rV 'Close the output file I5#KLZVg Close #1 lZ5LHUzP %rE:5) Print "Finished merging RPC data for sample " & sampName _C`&(?} Print "FRED formatted data file: " & Chr(9) & outFile ;Gc,-BDFw End Sub #`Af J,iS<lV_ 'Utility function to read the contents of a file into an array of strings. =VC"X ?N Function ReadFile(ByVal fileName As String, _ i}u,_
} ByRef lineArray() As String) As Long ~Up5 +7k@ %y96]e1 ReadFile = -1 /thFs4 Dim oFSO As Object Z hqGUb Set oFSO = CreateObject("Scripting.FileSystemObject") P 2-^j) Erase lineArray hn`yc7<}(u ]>vC.iYp Dim fid As Long azhilUD8 If oFSO.fileexists( fileName ) Then KgD sqwy fid = FreeFile() k)j6rU Open fileName For Input As fid mafnkQU lineArray = Split(Input(LOF(fid), fid), vbCrLf) `T'[H/ Close fid a/wg%cWG_ End If ,xSNTOJ Set oFSO = Nothing >Hr&F
nh+ Return UBound( lineArray ) 1U)U {i7j u~O9"-m !V End Function PJfADB7Y > J.q3 Sub GetFileList( ByVal in_dir As String, _ u0Q6+U ByRef in_flist() As String ) 8}M-b6RV !n`9V^` 'Redimension the file list array ?^3Y+)} Erase in_flist 3<XP/c"; H*.v*ro9_ 'Tracks how many files are found tDC?St1 Dim fCount As Long $~3?nib"j fCount = 0 EpW89X X-4(oE 'Recurse directory and search for text files :$=]*54`T Dim f As String <lkt'iT=Sz f = Dir$(in_dir & "*.txt") C1`fJhy While f <> "" */_$' /qV ReDim Preserve in_flist(fCount) gB_gjn\ in_flist(fCount) = f d[F3"b% fCount += 1 xe4`D>LUo f = Dir$() u+;iR/ Wend Nf5zQ@o_y ReDim Preserve in_flist(fCount-1) X :#}E7]j u5.zckV End Sub <B
Vx%
|