-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2026-01-09
- 在线时间1913小时
-
-
访问TA的空间加好友用道具
|
摘要: b>07t!; o<Zlm)"%1 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。 v
Y[s#*+ 2)f_L|o,m 背景: Y
Zj-%5 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。 X0.H(p#s 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。 k~>(XG[x& 图1. RPC Photonics工程漫射体结构及光束投射形状 (T%F^s5D #A/OGi hFIh<m=C?Y 步骤 v)5;~.+% vzIo2,/7 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。 H/D=$)3op P<]U 图2. RPC Photonics工程漫射体不同类型的散射数据 t+?Bb7p,H 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) N<)CG,/w[M 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 2 2v"?* 例如下所示: \dk1a Sample name: EDF-C1-56 @;/Pl>$|'G Merging data from file EDF-C1-56 0-0.txt l9.`2d]o Finished merging RPC data for sample EDF-C1-56 :U?g']`Z## FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt A!lZyG!3 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 E|@C:ghG a. 创建一个新的散射库 KdEvu? b. 散射模型命名 (!}N&!t c. 改变散射模型为“Tabulated BSDF”. cIU2 qFn[ 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 ) HMq}){=S 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。 h"`\'(,X 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, uMcI'= g. 点击OK N^;lp<{6? 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 C[^VM$ `^)`J S@qPf0dL< 脚本代码: J}V4.R5d G@7^M} '#Language "WWB-COM" 7P{= Pv+ 5 {! fa Option Explicit w~]2c{\Qz .eJKIck Sub Main /$; Z ~^P }i+C)VUX 'Cleanup .O-)m'5 ClearOutputWindow() f.g!~wGD 6qZQ20h Print "Merging RPC Photonics BSDF Data Files" 3p#UEH3 SetTextColor(255,0,0) 7ZUN;mr Print "Note: Script should be located in the same folder as the BSDF TXT files." ().C Print "Note: Do not run this script multiple times without deleting the output file between executions." -h8mJ D%Oi SetTextColor(0,0,0) maap X/J } %3;j5 ;6 'Current directory of this script (should be the same as the text files being merged) B4OFhtYE Dim cDir As String !rx5i cDir = MacroDir$ & "\" $1X!Ecq_ ~Q- /O~ 'Array which will be populated with the list of files to be merged .:-*89c Dim fList() As String, curFile As String jcePSps] GetFileList( cDir, fList ) sVO|Ghy65 jp-(n z\ Print "" }m!T~XR</ Print "Files found for merging:" BT:b&"AR[ For Each curFile In fList /0L]Pf; Print Chr(9) & curFile ^(*eo e Next ~LH).\V m=`V 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. %*L8W*V Dim nameArray() As String, sampName As String $9@Z\0
nameArray = Split(fList(0)," 0-0.txt") p,4S?cr>a sampName = nameArray(0) AfW:'>2 Print "" j97c@ Print "Sample name: " & Chr(9) & sampName nQw, /Lk "t{D5{q|[k 'Open an output file and write the FRED header data q|.0Ja Dim outFile As String Dhft[mvo outFile = cDir & sampName & "_FRED.txt" (Q"s;g Open outFile For Output As #1 Zf)<)o* Print #1, "type bsdf_data" Kt#X'!9/< Print #1, "format angles=deg bsdf=value scale=1" eET1f8B=L -OQ6;A"# 'Loop the file list, skip the two header lines and write the remaining data to file t-FrF </0 Dim lineArray() As String, curLine As Long %H"AHkge:a For Each curFile In fList En+`ZcA\z Print "Merging data from file " & curFile !&8B8jHqA ReadFile( cDir & curFile, lineArray ) O sIvW'$\ For curLine = 2 To UBound(lineArray) Xt*h2& Print #1, lineArray(curLine) S?H
qrf7< Next =HoA2,R) Next 7*&q"
;;17 #T2 'Close the output file ]T<RC\o Close #1 4!+IsT #w[Ie+ Print "Finished merging RPC data for sample " & sampName CIt@xi#I Print "FRED formatted data file: " & Chr(9) & outFile orF8% End Sub %?`$#*f\% v3/G.B@= 'Utility function to read the contents of a file into an array of strings. u_)'} Function ReadFile(ByVal fileName As String, _ :2&W9v ByRef lineArray() As String) As Long !uHVg(} K30{Fcb< h ReadFile = -1 {Pi]i? Dim oFSO As Object ADZU?7) Set oFSO = CreateObject("Scripting.FileSystemObject") \g;-q9g;O Erase lineArray \H?r[]*c% SQBe}FlktK Dim fid As Long XgZ.UT If oFSO.fileexists( fileName ) Then pL'+sW fid = FreeFile() i\k>2df Open fileName For Input As fid 8z"*CJ@ lineArray = Split(Input(LOF(fid), fid), vbCrLf) 2G`tS=Un Close fid [RUYH5>Ik End If *p%=u>?& Set oFSO = Nothing 6SD9lgF*- Return UBound( lineArray ) @X>Oj . =I9RM9O< End Function *1b)Va8v* (ft$ R? Sub GetFileList( ByVal in_dir As String, _ }7|UA%xz ByRef in_flist() As String ) _"c?[n f>_' ]eM% 'Redimension the file list array w
]$Hr Erase in_flist @ * *]o KP]{=~( 'Tracks how many files are found ?,x3*'-( Dim fCount As Long kC-OZ VoO fCount = 0 0h~7"qUF@ +/~;y{G..z 'Recurse directory and search for text files [E|% Dim f As String <-m[0zgq f = Dir$(in_dir & "*.txt") *5|q_K
Pt While f <> "" ;JQ;LbEn ReDim Preserve in_flist(fCount) e47N 9&4 in_flist(fCount) = f uz;z+Bd^ fCount += 1 =?gB@vS f = Dir$() %Y// } Wend nhP ua& ReDim Preserve in_flist(fCount-1) S+&Bf ~~D EG[Rda End Sub wLz@u$u?
|