-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-11-26
- 在线时间1892小时
-
-
访问TA的空间加好友用道具
|
摘要: 9%\<x oRM EC7!A0 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。 2G"mm( G'XlsyaWrb 背景: t1HUp dHY 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。 RMB?H)p+ 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。 sg12C 图1. RPC Photonics工程漫射体结构及光束投射形状 "Kk3# %8H*}@n ?uUK9*N 步骤 :oF\?e
Gy[;yLnX 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。 5YIiO7@4 zypZ3g{vz 图2. RPC Photonics工程漫射体不同类型的散射数据 woZ'T 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) uR"srn;^ 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 _<5 o1 例如下所示: Tgp}k%R~ Sample name: EDF-C1-56 XgKtg-, Merging data from file EDF-C1-56 0-0.txt 5VWXUNe@_q Finished merging RPC data for sample EDF-C1-56 HZ=Dd4! FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt M;W{A)0i1 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 )8oI
s a. 创建一个新的散射库
'{kNXCnZ b. 散射模型命名 \s;]Tg c. 改变散射模型为“Tabulated BSDF”. gcr,?rE< 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 ) #{(?a.: 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。 Y',s|M1})\ 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, IoNZ'g?d g. 点击OK io
cr 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 xc R '6{q;Bxo Ig1cf9 : 脚本代码: 7"= BZ1@?3 '#Language "WWB-COM" xk86?2b{) 2uw%0r3Vi6 Option Explicit IDzP<u8v BW:&AP@B Sub Main \~xsBPX+x xXZ$#z\Z, 'Cleanup [w~teX0! ClearOutputWindow() 8x'rNb %-]j;'6}cX Print "Merging RPC Photonics BSDF Data Files" <(d^2-0 SetTextColor(255,0,0) 2Iz@lrO6 Print "Note: Script should be located in the same folder as the BSDF TXT files." a#! Vi93 Print "Note: Do not run this script multiple times without deleting the output file between executions." 6fPuTQ}fY> SetTextColor(0,0,0) x{ ~-YzWho qYIBP?`g 'Current directory of this script (should be the same as the text files being merged) ^/R@bp#< Dim cDir As String ,{itnKJC cDir = MacroDir$ & "\" ?TE#4}p| 7*^\mycv 'Array which will be populated with the list of files to be merged 65ijzZL; Dim fList() As String, curFile As String 2DTH|Yv GetFileList( cDir, fList ) WKBPqfC J~ v<Z/gm Print "" ]*juF[r( Print "Files found for merging:" *~ 4uF For Each curFile In fList GfQMdLy\Z Print Chr(9) & curFile D.qbzJz Next S~YrXQ{_>- xQ1&j,R] 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. RNoS7[& Dim nameArray() As String, sampName As String -sO EL{ nameArray = Split(fList(0)," 0-0.txt") DXKk1u?Tq sampName = nameArray(0) ]ZO^@sH Print "" I=f1kr
pR Print "Sample name: " & Chr(9) & sampName C_O7 H)
q9.Jg 'Open an output file and write the FRED header data @z
dmB~C Dim outFile As String GOH@|2N outFile = cDir & sampName & "_FRED.txt" E3,Z(dpX! Open outFile For Output As #1 aU4'_%Y@ Print #1, "type bsdf_data" p`{<q
- Print #1, "format angles=deg bsdf=value scale=1" 0plRsZ} \C}tK,79 'Loop the file list, skip the two header lines and write the remaining data to file <6p{eGAQV Dim lineArray() As String, curLine As Long } M'\s For Each curFile In fList %~Nf, Print "Merging data from file " & curFile "TtK!>!. ReadFile( cDir & curFile, lineArray ) 28X)s!W' For curLine = 2 To UBound(lineArray) J;m[1Mae& Print #1, lineArray(curLine) o1zc`Ibd Next &xH>U*c Next X,O&X t47 f$gq 'Close the output file ]}>GUXe)^ Close #1 v .r$]O ?{_dW=AQ1 Print "Finished merging RPC data for sample " & sampName \jq1F9, Print "FRED formatted data file: " & Chr(9) & outFile -Rjn<bTIy End Sub jGI!}4_ e"^1- U\ 'Utility function to read the contents of a file into an array of strings. nkN]z
^j Function ReadFile(ByVal fileName As String, _ B+zq!+ HJ ByRef lineArray() As String) As Long pPQ]#v woR((K] #G ReadFile = -1 oH6(Lq'q Dim oFSO As Object (nBJ,v) Set oFSO = CreateObject("Scripting.FileSystemObject") ?_<ZCH Erase lineArray CoJaVLl {j:{wW. Dim fid As Long zKfb If oFSO.fileexists( fileName ) Then *WMcE$w/D fid = FreeFile() *%Gy-5hM Open fileName For Input As fid e5`{*g$i). lineArray = Split(Input(LOF(fid), fid), vbCrLf) ynP^|Ou Close fid ;HqK^[1\ End If *WX6C("M Set oFSO = Nothing i>)Whr'e8 Return UBound( lineArray ) A
FfgGO ;C{2*0"H| End Function <YJU?G:@ ) 3YE$, Sub GetFileList( ByVal in_dir As String, _ 7qL]_u[^ ByRef in_flist() As String ) ",Q \A I 4,$x~m`N 'Redimension the file list array B>?. Nr Erase in_flist }s{zy:1O n4Q!lJ 'Tracks how many files are found cE]tvL:g Dim fCount As Long T w"^I*B fCount = 0 BIcE3}dS8 HCHC~FNd 'Recurse directory and search for text files d54>nycU~N Dim f As String L]HY*e f = Dir$(in_dir & "*.txt") h+Dg"j<[ While f <> "" uE5kL{Fv ReDim Preserve in_flist(fCount) :kFWUs= in_flist(fCount) = f Iupk+x> fCount += 1 )QI]b4[ f = Dir$() .`)ICX Wend ,HMB`vF ReDim Preserve in_flist(fCount-1) eKStt|M' N{Is2Ia End Sub ]^Q`CiKd U.wgae].O; CH9#<?l QQ:2987619807 j/^0q90QO
|