-
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: =h5&:?X s8BfOl- 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。 7q\& jB)RvvMU5 背景: O?\UPNb:K 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。 [bM$n
m FRED是美国Photon Engineering 公司开发的光学工程仿真软件,其在杂散光分析中独特的算法、高效的准确性,使其与其它同类产品相比更具优势。本案例我们重点讲述如何由RPC Photonics的BSDF数据转为FRED可识别的散射数据。 eb1WTK@ 图1. RPC Photonics工程漫射体结构及光束投射形状 SB~HHx09 m8M2ka 1i=lJmr 步骤 ^4MRG6G bd|ZhRsL 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 j IO2uTM~ g
Va;! 图2. RPC Photonics工程漫射体不同类型的散射数据 3DjlX* 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) Rhi`4wo0$ 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 'O>p@BEK 例如下所示: gn82_ Sample name: EDF-C1-56 @M( hyS&on Merging data from file EDF-C1-56 0-0.txt ul(pp+%S Finished merging RPC data for sample EDF-C1-56 ZkWX4?&OMt FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt `r#]dT[g 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 m[aBHA^g a. 创建一个新的散射库 -Cn x!g} b. 散射模型命名 C2e.RTxc
c. 改变散射模型为“Tabulated BSDF”. j(aok5:e 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 ) QC\r|RXW 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。 7QSrC/e 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, I{nrOb1G( g. 点击OK .)(5F45Wg 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 \d-H+t] MS5X#B ?uAq goCl 脚本代码: V2B@Lq"9` 7a0T] '#Language "WWB-COM" 0*J},#ba$ k2-+3zx Option Explicit 3A&:
c/ F)8M9%g5m Sub Main N1D{ % m>FP&~2 'Cleanup "udA-;!@& ClearOutputWindow() DpbprT7_ JnE\z*NB Print "Merging RPC Photonics BSDF Data Files" 3g79/w SetTextColor(255,0,0) "J(T?|t Print "Note: Script should be located in the same folder as the BSDF TXT files." 8*x/NaH
/\ Print "Note: Do not run this script multiple times without deleting the output file between executions." to9X2^ SetTextColor(0,0,0) }Y~<|vZ Q]1s*P 'Current directory of this script (should be the same as the text files being merged)
Cl>|*h+m Dim cDir As String q2+`a;_S cDir = MacroDir$ & "\" sgLw,WZ: `g}po%k 'Array which will be populated with the list of files to be merged ptQCqQ1_d Dim fList() As String, curFile As String ^\ku}X_[? GetFileList( cDir, fList ) >,6%Y3 `G'Z,P-a Print "" Mni@@W Print "Files found for merging:" >PS`;S!( For Each curFile In fList 2F&VG|" Print Chr(9) & curFile <dWms`QcO Next )+ (GE % <1&\5f<5 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. w~AW(
VX Dim nameArray() As String, sampName As String B<{Yj}.. nameArray = Split(fList(0)," 0-0.txt") Oh=E! sampName = nameArray(0) Mp`!zwR Print "" Ud:;kI%Vj Print "Sample name: " & Chr(9) & sampName wbQs>pc G2
0 'Open an output file and write the FRED header data (z.4er}o Dim outFile As String jdf3XTw outFile = cDir & sampName & "_FRED.txt" GHRr+ Open outFile For Output As #1 ^Lc, w Print #1, "type bsdf_data" e3.q8r Print #1, "format angles=deg bsdf=value scale=1" &{e:6t <4:%M 'Loop the file list, skip the two header lines and write the remaining data to file .+A2\F.^ Dim lineArray() As String, curLine As Long
myOdf'= For Each curFile In fList yPoa04!{= Print "Merging data from file " & curFile F\2<q$Zn+ ReadFile( cDir & curFile, lineArray ) kXN8hU}iq For curLine = 2 To UBound(lineArray) OrY^ ?E Print #1, lineArray(curLine) o`M.v[O Next miUjpXt Next cqG&n0zb /k.?x] Ab 'Close the output file x/L(0z Close #1 T@R2H&L ja&S^B^@ Print "Finished merging RPC data for sample " & sampName z3p
TdUt Print "FRED formatted data file: " & Chr(9) & outFile lobC G End Sub MLvd6tIv, [_-[S 'Utility function to read the contents of a file into an array of strings. $O^"OQ_@ Function ReadFile(ByVal fileName As String, _ 5 \iX%w@ ByRef lineArray() As String) As Long ('6sW/F*ab UO(?EELm ReadFile = -1 J-ErG! Dim oFSO As Object 2O(= 2X Set oFSO = CreateObject("Scripting.FileSystemObject") @MxB
d,P Erase lineArray ,zOv-pH ]D<3yIGS Dim fid As Long FO:k
>F If oFSO.fileexists( fileName ) Then .cK<jF@' fid = FreeFile() /s
Bs eI Open fileName For Input As fid ]$)U~)T
iW lineArray = Split(Input(LOF(fid), fid), vbCrLf) glomwny Close fid :Izdj*HL;A End If 5}4>vEn Set oFSO = Nothing TJ>$ ~9&Sy Return UBound( lineArray ) AGV+Y6 _F`RwBOjs End Function xM_+vN*( c,Yd#nokC Sub GetFileList( ByVal in_dir As String, _ h3Y|0-D ByRef in_flist() As String ) MI,kKi ki?ETC 'Redimension the file list array <"Yx}5n. Erase in_flist rnP *} ' 1D1y' 'Tracks how many files are found W3A9uk6 Dim fCount As Long r:5u(2 fCount = 0 Yu:!l> H{g&yo 'Recurse directory and search for text files 2h#_n'DV Dim f As String [! YSW' f = Dir$(in_dir & "*.txt") (%)<jg1 While f <> "" j[|mC;y. ReDim Preserve in_flist(fCount) zRFvWOxC\ in_flist(fCount) = f z4r g.ai fCount += 1 ;uaZp.<um& f = Dir$() zhVkn]z~* Wend i\C~]K~O! ReDim Preserve in_flist(fCount-1) .&rL>A2U @i(;}rx End Sub "]hQ\b\O
|