-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-02
- 在线时间1892小时
-
-
访问TA的空间加好友用道具
|
摘要: UISsiiG( UFUEY/q 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。 )@y7 qb v-Q>I5D;: 背景: 0($On`# Thorlabs和RPC Photonics联手共同推出的新型漫射体及光束整形技术,可以解决其他技术的不足,大大改善了诸如光刻系统、有效固态照明,显示,背光,显示亮度增强和投影屏等大多数应用的性能。这项我们称之为工程漫射体(Engineered DiffusersTM)的新概念,与其他技术有许多不同。与诸如磨砂玻璃、乳色玻璃和全息元件等随机漫射体截然不同,工程漫射体要求对于每个散射中心,通常为微透镜单元,都进行控制。例如全息漫射体可以视为一组随机排列的透镜,但是通过全息曝光形成的类透镜效果只能通过静态方式进行控制:而无法单独操控每个微透镜单元,这也帮助解释了全息漫射体无法控制光的分布和轮廓。另一方面,在工程漫射体中,每个微透镜单元形成漫射体,由其凹形纵断面和在阵列中的位置所确定。同时,为了确保漫射体不受输入光束变化的影响,并且不产生衍射效果,微透镜单元的分布是随机的,根据产生相应的光束形状函数所选取的概率分布函数来确定。因此,工程漫射体同时保留了随机与确定性漫射体的优点,从而实现高性能的光束整形功能。 h'_$I4e) 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。 sOS^ 图1. RPC Photonics工程漫射体结构及光束投射形状 { 9\/aXPS 9RkNRB)8 _9Rj, 步骤 #uICHt3 5j9%W18 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。 .f>7a;V?} yx ;K&> 图2. RPC Photonics工程漫射体不同类型的散射数据 ziM@@$.F 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) ?|!m 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 l
m(mY$B*_ 例如下所示: $&Z#2
X. Sample name: EDF-C1-56 aH8]$e8_,\ Merging data from file EDF-C1-56 0-0.txt t}OzF cyqN Finished merging RPC data for sample EDF-C1-56 2+g'ul` FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt .NxskXq) 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 wqJl[~O$ a. 创建一个新的散射库 _u6MSRX[6$ b. 散射模型命名 =U8+1b c. 改变散射模型为“Tabulated BSDF”. &0J8ICd= 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 ) %[azMlp< 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。 K*4ib/'E a 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, U%;E: | g. 点击OK
J6rWe 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 CteNJBm [8oX[oP T\:*+W37 脚本代码: ua_,c\iL "s(|pQh; '#Language "WWB-COM" (*V!V3E3# Z,M2vRj"qT Option Explicit |)*!&\Ch kV!1k<f Sub Main 0(&RmR #MiO4zXgd 'Cleanup [
<k&]Kv ClearOutputWindow() R9QW%!:,\2 -mLu!32I< Print "Merging RPC Photonics BSDF Data Files" @3FQMs4 SetTextColor(255,0,0) L;+e)I] Print "Note: Script should be located in the same folder as the BSDF TXT files." u^WZsW Print "Note: Do not run this script multiple times without deleting the output file between executions." h,b_8g{! SetTextColor(0,0,0) t2rZ%[O 8E9k7 'Current directory of this script (should be the same as the text files being merged) R"\(a Dim cDir As String ejbtdU8N< cDir = MacroDir$ & "\" BuxU+ Q7/Jyx| 'Array which will be populated with the list of files to be merged /BhP`a%2Q Dim fList() As String, curFile As String l\d[S] GetFileList( cDir, fList ) e:_[0# N.SV*G
@ Print "" uigzf^6, Print "Files found for merging:" n,_9Eh#WD For Each curFile In fList o? K>ji! Print Chr(9) & curFile .SSPJY(
Next <dz_7hR" f2v~: u 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. 54RexB o Dim nameArray() As String, sampName As String O<dCvH nameArray = Split(fList(0)," 0-0.txt") 47A[-&y*X sampName = nameArray(0) =CCddLO Print "" O~6AX)|&= Print "Sample name: " & Chr(9) & sampName (/t{z= KxfH6:\RB 'Open an output file and write the FRED header data Gvr>n@n Dim outFile As String -OKXfN] outFile = cDir & sampName & "_FRED.txt" gI@nE:(m Open outFile For Output As #1 t$R0UprK Print #1, "type bsdf_data" /1= x8Sb Print #1, "format angles=deg bsdf=value scale=1" v`:!$U*
H= pK/RkA1 'Loop the file list, skip the two header lines and write the remaining data to file vSH-hAk Dim lineArray() As String, curLine As Long n:H
|=SF{ For Each curFile In fList n-<`Z NMU Print "Merging data from file " & curFile 0$U\H>r ReadFile( cDir & curFile, lineArray ) oDGBC For curLine = 2 To UBound(lineArray) 1 7iw`@ Print #1, lineArray(curLine) aghlYcPg Next zhyf}Ta' Next c]ga)A( XZ3M~cDq 'Close the output file f;&XTF5D^ Close #1 [RTo[-ci2 m}6>F0Kv Print "Finished merging RPC data for sample " & sampName )[yKO Print "FRED formatted data file: " & Chr(9) & outFile 6QP T End Sub @]EdUzzKq VwXR,( 'Utility function to read the contents of a file into an array of strings. piIGSC Function ReadFile(ByVal fileName As String, _ `1FNs?j ByRef lineArray() As String) As Long |;U3pq) +hH7|:JQ ReadFile = -1 V{}TG] Dim oFSO As Object RGY#0 .Z} Set oFSO = CreateObject("Scripting.FileSystemObject") a"k,x-EL( Erase lineArray *_ajb: ma`sv<f4-! Dim fid As Long G2:.8ok If oFSO.fileexists( fileName ) Then 1d&Q
E\2} fid = FreeFile() Fg2/rC:_ Open fileName For Input As fid E
<r;J lineArray = Split(Input(LOF(fid), fid), vbCrLf) 5xH*&GpL7 Close fid GB6(WAmr End If |Y2n6gkH[ Set oFSO = Nothing Y`xAJ#=
,i Return UBound( lineArray ) li}>xDSQ4 V:AA{< End Function mxwG~a'_ oL9ELtb]s Sub GetFileList( ByVal in_dir As String, _ KkR.p,/ ByRef in_flist() As String ) V:g XP1P nyG 5sWMpe 'Redimension the file list array wFBSux$ Erase in_flist QxBH{TG :a( Oc'T 'Tracks how many files are found 7?
="{; Dim fCount As Long SNH AL F fCount = 0 ^)3=WD'! 7~H$p X 'Recurse directory and search for text files #"o`'5 Dim f As String 3b<;y% f = Dir$(in_dir & "*.txt") gO]8hLT While f <> ""
3BB/u%N} ReDim Preserve in_flist(fCount) L 1q] in_flist(fCount) = f >R\!Qk fCount += 1 X(C=O?A f = Dir$() ',6d0>4* Wend ;9uDV-" ReDim Preserve in_flist(fCount-1) )/bv@Am rFto1m End Sub H.[(`wi!I
|