-
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: dzRnI* Xf%vfAf 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。 =_=0l+\} UY}EW`$#m 背景: s^R$u"pFs 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。 m>{I>:sq 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。 9cXL4 图1. RPC Photonics工程漫射体结构及光束投射形状 wvcj*{7[ #\l#f8(l dh-?_|" 步骤 u/.# zn@9h U_C[9Z'P 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。 U9Gg#M4tY +|6E~#zklY 图2. RPC Photonics工程漫射体不同类型的散射数据 %%+@s 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) l[Ko> 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 <El!,UBq< 例如下所示: oEJxey]B7 Sample name: EDF-C1-56 6ee1^> Merging data from file EDF-C1-56 0-0.txt UXPF"}S2 Finished merging RPC data for sample EDF-C1-56 t3<HE_B| FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt j*_>/gi 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 f#&@Vl(i& a. 创建一个新的散射库 hH]oJ}H \ b. 散射模型命名 Fgw$;W c. 改变散射模型为“Tabulated BSDF”. 3U9leY'2N 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 ) sB=s .`9 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。 /}Ct2w&<k 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,
MZ%S3' g. 点击OK zEk/#& 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 $VJE&b X&gXhr#dL\ p?'
F$Wz 脚本代码: j)mi~i*U 7b*9
Th*a '#Language "WWB-COM" p?#xd!tc2N 1[]V @P^ Option Explicit Mi<}q@]e S #C;"se Sub Main ')Qb,#/,% 5|g#>sx>`q 'Cleanup asJ t6C ClearOutputWindow() GXwQ
)P5] tN_~zP Print "Merging RPC Photonics BSDF Data Files" fiQ/ &]|5 SetTextColor(255,0,0) $%zM Z Print "Note: Script should be located in the same folder as the BSDF TXT files." 2#Y5*r's\ Print "Note: Do not run this script multiple times without deleting the output file between executions." X<uH [ SetTextColor(0,0,0) .#_g.0< uWkuw5; 'Current directory of this script (should be the same as the text files being merged) 8nTdZu Dim cDir As String ]//Dd/L6 cDir = MacroDir$ & "\" =`t%p1 A&`7 l5~X 'Array which will be populated with the list of files to be merged jF6[+bW< Dim fList() As String, curFile As String n:[LsbTk GetFileList( cDir, fList ) @O| lA x?2y^3<5 Print "" vqRW^>~-B Print "Files found for merging:" Mo&Po9 For Each curFile In fList $Hal] Print Chr(9) & curFile f/pr Next \SA$:^zO r(Y@; 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. q&@q/9kz Dim nameArray() As String, sampName As String %5/h;4
nameArray = Split(fList(0)," 0-0.txt") ol@LLT_m sampName = nameArray(0) o%l|16DR Print "" '+iqbcUd, Print "Sample name: " & Chr(9) & sampName 2@f?yh0 t**o<p#)f 'Open an output file and write the FRED header data j6&7tK, Dim outFile As String QO3QR/Ww outFile = cDir & sampName & "_FRED.txt" jHpFl4VPz Open outFile For Output As #1 q6zKyOE Print #1, "type bsdf_data" qj<_* Print #1, "format angles=deg bsdf=value scale=1" 0BQ< a r8vF I6J 'Loop the file list, skip the two header lines and write the remaining data to file H:`[$
^ Dim lineArray() As String, curLine As Long vDVE#Nm_ For Each curFile In fList `YPNVm<3) Print "Merging data from file " & curFile J@Qw6J ReadFile( cDir & curFile, lineArray ) 'fIirGOl For curLine = 2 To UBound(lineArray) &&($LnyA] Print #1, lineArray(curLine) j~`rc2n% Next \bumB<w(] Next ~
H $q ]z5gC`E0 'Close the output file {9YNv<3 Close #1 5:~BGK&{Y 9 e0Oj3!B Print "Finished merging RPC data for sample " & sampName ?o.Q Print "FRED formatted data file: " & Chr(9) & outFile Zn"1qLPF End Sub /]"2;e-s+ Wo~#R 'Utility function to read the contents of a file into an array of strings. L\y>WR%s Function ReadFile(ByVal fileName As String, _ t"]~e" ByRef lineArray() As String) As Long nh+f,HtSt PH3#\
v.
ReadFile = -1 4O'X+dv^I Dim oFSO As Object w65D;9/; Set oFSO = CreateObject("Scripting.FileSystemObject") M}BqSzd* Erase lineArray #F!'B|n Z}4
`y"By Dim fid As Long y}!}*Qj+/ If oFSO.fileexists( fileName ) Then '}$$o1R fid = FreeFile() >6"u{Qmr Open fileName For Input As fid *WpDavovyB lineArray = Split(Input(LOF(fid), fid), vbCrLf) J,j! Close fid I:G4i}mA End If h?ZxS Set oFSO = Nothing 3erGTa[|q Return UBound( lineArray ) q+Cq&|4
?2 9`p|>d!. End Function sy;_%,}N `t~Zkb4> Sub GetFileList( ByVal in_dir As String, _ V_Oj?MMpn ByRef in_flist() As String ) fG*366W 1C'_I 'Redimension the file list array MUfhk)" Erase in_flist BR [3i}Ud b 6B5 'Tracks how many files are found CDTM<0`% Dim fCount As Long ET 2@dY~ fCount = 0 /vLdm-4 q:/<^| 'Recurse directory and search for text files a@&P\"k Dim f As String d~U}IMj f = Dir$(in_dir & "*.txt") zwa%$U While f <> "" $D)Ajd; ReDim Preserve in_flist(fCount) v8!Ts" in_flist(fCount) = f `gFE/i18 fCount += 1 EFNi# D8s f = Dir$() -%eBip,'yl Wend <|MF\D' ReDim Preserve in_flist(fCount-1) cq,0?2R`t $'obj End Sub mjtmN0^SR
|