-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-04
- 在线时间1893小时
-
-
访问TA的空间加好友用道具
|
摘要: imc1rY!~' DFMf"_p 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。 ]xxE_B7 U6?3 z 背景: Og-v][ 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。 GLp~SeF# 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。 sa?s[ 图1. RPC Photonics工程漫射体结构及光束投射形状 ]P*H,&I`# j4wsDtmAU k
1lK`p 步骤 qm/#kPlM Nt,:`o | 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。 PO nF_FC .4J7 ^l 图2. RPC Photonics工程漫射体不同类型的散射数据 ^U9b)KA 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) zI= 9 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 Q_6v3no1 例如下所示: 7Hg;SK6t0 Sample name: EDF-C1-56 OUhlQq\ Merging data from file EDF-C1-56 0-0.txt GY rUB59 Finished merging RPC data for sample EDF-C1-56 5cj&D74o FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt LEg ?/!LIT 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 *X!+wK-+ a. 创建一个新的散射库 6!@p$ pm)a b. 散射模型命名 ]+5Y\~I c. 改变散射模型为“Tabulated BSDF”. LfvNO/:, 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 ) u
p zBd] 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。 }XD=N#p@z 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, *7{{z%5Pu g. 点击OK NC3XJ
4 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 8/@*6J F?Fxm*Wa/ Am<){&XT
] 脚本代码: 6?';ip *QT7\ht3 '#Language "WWB-COM" ~zoZ{YqP &8dj*!4H Option Explicit qFp]jbU r*c x_** Sub Main s(:N>K5* =)f.Yf|A* 'Cleanup .7HEI;4 ClearOutputWindow() 3F9 dr@I.7 WtlLqD!_D Print "Merging RPC Photonics BSDF Data Files" sWq@E6,I SetTextColor(255,0,0) x|*m ok Print "Note: Script should be located in the same folder as the BSDF TXT files." S" PJ@E}^E Print "Note: Do not run this script multiple times without deleting the output file between executions." Z*Fn2I4 SetTextColor(0,0,0) >CYz6G j qgxGq(6K 'Current directory of this script (should be the same as the text files being merged) cS>xT cj Dim cDir As String be]Zx`)k cDir = MacroDir$ & "\" l]L"Ex{ gMPvzBpP 'Array which will be populated with the list of files to be merged ynn>d Dim fList() As String, curFile As String z
J V>; GetFileList( cDir, fList ) 'Uo|@tK v807)JwS Print "" {tuGkRY2~ Print "Files found for merging:" E8.1jCL>{" For Each curFile In fList CtHsi8m Print Chr(9) & curFile KkSv23In Next %O*)'ni
([NS% 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. #U6~U6@ Dim nameArray() As String, sampName As String )gG_K$08? nameArray = Split(fList(0)," 0-0.txt") ={I(i6 sampName = nameArray(0) v"sN
K Print "" ~V/?/J$ Print "Sample name: " & Chr(9) & sampName #"TL*p `L"l{^cH 'Open an output file and write the FRED header data (wp?tMN5# Dim outFile As String 3JZ9 G79H outFile = cDir & sampName & "_FRED.txt" Zzv,p Open outFile For Output As #1 R}$A>)%dx Print #1, "type bsdf_data" CMfR&G,) Print #1, "format angles=deg bsdf=value scale=1" S^)xioKsJ xKXD`-|W 'Loop the file list, skip the two header lines and write the remaining data to file
e9eBD Dim lineArray() As String, curLine As Long cKt8e^P For Each curFile In fList 51puR8AG> Print "Merging data from file " & curFile `7_s@4: ReadFile( cDir & curFile, lineArray ) eSSv8[u For curLine = 2 To UBound(lineArray) JjG>$z Print #1, lineArray(curLine) &z"yls Next KCfcEz Next 7.B]B,] ?Q: KW 'Close the output file T0BM:ofx Close #1 /pz(s+4= ]ChN]>o Print "Finished merging RPC data for sample " & sampName +w+qTZyky Print "FRED formatted data file: " & Chr(9) & outFile Jek)`D End Sub
MU~nvs;: xJ)vfo 'Utility function to read the contents of a file into an array of strings. -;t]e6[ Function ReadFile(ByVal fileName As String, _ d<v)ovQJ] ByRef lineArray() As String) As Long E"b"VB / Hexv#3 ReadFile = -1 !,N),xG}~ Dim oFSO As Object 2_;3B4GDF Set oFSO = CreateObject("Scripting.FileSystemObject") A@OSh6/{h Erase lineArray oW8 hC } @jT-t]P Dim fid As Long 4vf,RjB-5 If oFSO.fileexists( fileName ) Then qjd8Q fid = FreeFile() u9) <i]2 Open fileName For Input As fid ' Y.s}Duj lineArray = Split(Input(LOF(fid), fid), vbCrLf) \B
D'" Close fid YGr^uTQb End If S-)%# Set oFSO = Nothing LxxFosi8 Return UBound( lineArray ) X&({`Uw<K !_=3Dz End Function >-YWq HtGGcO'bqg Sub GetFileList( ByVal in_dir As String, _ .+hM1OF`x ByRef in_flist() As String ) Y7
`i~K; ~<w9a] 'Redimension the file list array i:,37INMt Erase in_flist s1NRUV2E -4'yC_8t 'Tracks how many files are found }mSfg Dim fCount As Long cakb.Q fCount = 0 [vY? ! mu =H&JC 'Recurse directory and search for text files X?Mc"M Dim f As String kQMALS@R f = Dir$(in_dir & "*.txt") ok7yFm1\ While f <> "" rocG;$[ ReDim Preserve in_flist(fCount) #35@YMF in_flist(fCount) = f &GH,is fCount += 1 :]oR x f = Dir$() o`]u& Wend FGG7;0( ReDim Preserve in_flist(fCount-1) Qs.g% zg83->[ End Sub {^VvL'n
|