-
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: J
fsCkS #;?z< 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。 li/O&@g` CgEeO,N]j 背景: BMFpkK9| 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。 {wA@5+[ 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。 Fp@eb8Pl 图1. RPC Photonics工程漫射体结构及光束投射形状 I&>R]DV "b -KVZ
W-Hw%bwN/q 步骤 b%|%Rek8 2"V?+Hhz 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。 yDy3;*lE ~^Vt)/}Q 图2. RPC Photonics工程漫射体不同类型的散射数据 _NqEhf:8 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) 9O}YtX2 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 F Fg0} 例如下所示: siyJjE)}w Sample name: EDF-C1-56 \Sm.]=br Merging data from file EDF-C1-56 0-0.txt mjy%xzVr6^ Finished merging RPC data for sample EDF-C1-56 yKfRwO[j FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt S~Nx;sB 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 z
KJ6j ]m a. 创建一个新的散射库 2psI\7UjA] b. 散射模型命名 LuQ=i`eXx c. 改变散射模型为“Tabulated BSDF”. /i^b;?/1 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 ) ??1V__w 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。 7NJ1cQ-}t 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, f}XUxIQ-< g. 点击OK LZ\}Kgi(!T 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 #a}fI . 1?AU6\ M-|4cd]6 脚本代码: 7%)4cHZ^$? 6aMqU?- '#Language "WWB-COM" M^g"U` `n5|4yaG~ Option Explicit JNX7]j\ <=jE,6_| Sub Main *W#x#0j k[G? 22t 'Cleanup w_\niqm<y ClearOutputWindow() ULQ*cW&;? :X2B+}6_& Print "Merging RPC Photonics BSDF Data Files" 4y)"IOd#| SetTextColor(255,0,0) dwAju:-H Print "Note: Script should be located in the same folder as the BSDF TXT files." S ._9 Print "Note: Do not run this script multiple times without deleting the output file between executions." Ij{{Z;o3 SetTextColor(0,0,0) &?YQVwsN y4M<L. RO 'Current directory of this script (should be the same as the text files being merged) Ng+k{vAj Dim cDir As String Hyq|%\A cDir = MacroDir$ & "\" '+' Q1s`d?P/` 'Array which will be populated with the list of files to be merged my*UN_] Dim fList() As String, curFile As String m0un=>{ GetFileList( cDir, fList ) 5O*.qp? l'-iIbKX Print "" (x?A#o>% Print "Files found for merging:" ?c=l"\^x For Each curFile In fList +2C:] Print Chr(9) & curFile "C}nS=]8m Next wf8vKl#Kfw `iQyKZS/+ 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. d!w32Y,. Dim nameArray() As String, sampName As String JJ7-$h'0q nameArray = Split(fList(0)," 0-0.txt") M,cI0i sampName = nameArray(0) yUEUIPL Print "" mn
8A%6W Print "Sample name: " & Chr(9) & sampName !|Vjv}UO S>cT(q_& 'Open an output file and write the FRED header data E})PNf; Dim outFile As String m,*t}j0 7 outFile = cDir & sampName & "_FRED.txt" iFga==rw Open outFile For Output As #1 i,* DWD+ Print #1, "type bsdf_data" vxbO>c Print #1, "format angles=deg bsdf=value scale=1" 183'1Z$KA ^B]M- XG 'Loop the file list, skip the two header lines and write the remaining data to file }$g5:k! Dim lineArray() As String, curLine As Long % J+'7'g For Each curFile In fList zif()i
Print "Merging data from file " & curFile [f-
#pew ReadFile( cDir & curFile, lineArray ) 5l{_E:.1 For curLine = 2 To UBound(lineArray) ^@L Print #1, lineArray(curLine) rQ~%SUM7 Next tEf-BV;\y Next p[g!LD bjD0y
cB[ 'Close the output file EeL~`$f Close #1 a=C?fh s
g6 Print "Finished merging RPC data for sample " & sampName 6=|Q>[K Print "FRED formatted data file: " & Chr(9) & outFile _K/h/!\n End Sub T[ mTA>d !X
|Tf 'Utility function to read the contents of a file into an array of strings. 3MkF Function ReadFile(ByVal fileName As String, _ ^"*r' ByRef lineArray() As String) As Long ~#) DJ N2q'$o ReadFile = -1 !aIIjWz] Dim oFSO As Object #?8'Z/1) Set oFSO = CreateObject("Scripting.FileSystemObject") Pm"
,7 Erase lineArray X*d,z~k%*d GT#i Y* Dim fid As Long 7j._3'M=Kc If oFSO.fileexists( fileName ) Then #l{qb]n] fid = FreeFile() ]FsPlxk6 Open fileName For Input As fid ?vM{9!M lineArray = Split(Input(LOF(fid), fid), vbCrLf) ,X9Y/S
l Close fid -C.eXR{s End If ' 71D:%p Set oFSO = Nothing TLO-$>h Return UBound( lineArray ) b:W]L3Z8 <qv:7@ End Function 5b|_?Em7 njvmf*A?S Sub GetFileList( ByVal in_dir As String, _ ) ~ C)4 ByRef in_flist() As String ) `YIpZ
rB d]w*fn 'Redimension the file list array ><^A4s Erase in_flist +| Cvv]Tx1 /5zzzaj{ 'Tracks how many files are found rK)%n!Z Dim fCount As Long =C5[75z#+ fCount = 0 5E}0<& d4A}BTs1 'Recurse directory and search for text files 8fZ\})t Dim f As String [=.. #y!U f = Dir$(in_dir & "*.txt") [wIyW/+ While f <> "" #YhKAG@| ReDim Preserve in_flist(fCount) PvKe|In( in_flist(fCount) = f =d(
6
) fCount += 1 e|]g?! f = Dir$() P_Po g^ Wend Y$Os&t@bu ReDim Preserve in_flist(fCount-1) D`,@EW]. 2t#9ih"9 End Sub scN}eg:5
|