-
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: G;AV~1i:~ &KeD{M% 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。 fydQaxCND ^Ov+n1,) 背景: VmTgD96 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。 >DR/lBtL 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。 M[&p[P@ 图1. RPC Photonics工程漫射体结构及光束投射形状 Wp=&nh 9sB LCZ U9//m=_ 步骤 ,j[1!*Z_[ .wuRT>4G)G 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。 ">R`S<W l37l| xp~ 图2. RPC Photonics工程漫射体不同类型的散射数据 #Xun>0 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) *18J$ 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 EJTa~ 例如下所示: (/J %Huy Sample name: EDF-C1-56 Now2ad& Merging data from file EDF-C1-56 0-0.txt ~#JX
0J= Finished merging RPC data for sample EDF-C1-56 <kWNx.eci FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt bzX/Zts 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 rK
cr1VFy a. 创建一个新的散射库 \
id(P3M b. 散射模型命名 8t&'Yk c. 改变散射模型为“Tabulated BSDF”.
yc@:*Z 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 ) KRj3??b 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。 j!?bE3r~ 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,
`AELe_ g. 点击OK koT: r 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 !9=Y(rb T;B/Wm!x $s5D/60nO 脚本代码: X#u< 3<P O>arCr=H '#Language "WWB-COM" cN#f$ g+u5u\k Option Explicit jD_B&MQz #0/^v* Sub Main ~ouRDO AKKVd%
P( 'Cleanup -<q@0IYyi ClearOutputWindow() @-}!o&G0 HlX 2:\\ Print "Merging RPC Photonics BSDF Data Files" _K|?;j#x0k SetTextColor(255,0,0) !o/;"'&E Print "Note: Script should be located in the same folder as the BSDF TXT files." .h;X5q1 Print "Note: Do not run this script multiple times without deleting the output file between executions."
1O@cev; SetTextColor(0,0,0) 8'mm<BV;sT
B*Q 'Current directory of this script (should be the same as the text files being merged) Fk&A2C}$b Dim cDir As String ~2?UEv6 cDir = MacroDir$ & "\" %'[ pucEF %{";RfSVX% 'Array which will be populated with the list of files to be merged #'h(o/hz&& Dim fList() As String, curFile As String =zKbvwe%X GetFileList( cDir, fList ) ZUeA&&{
>U')ICD~ Print "" 3x~AaC.j Print "Files found for merging:" <fcw:Ae For Each curFile In fList 7:h_U9Za?$ Print Chr(9) & curFile .[X"+i\ Next 8]0?mV8iOE |0aGX]Y 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. Qx !!
Ttd{ Dim nameArray() As String, sampName As String V@1K nameArray = Split(fList(0)," 0-0.txt") I}7=\S/@ sampName = nameArray(0) .aqP= Print "" Zl`sY5{1 Print "Sample name: " & Chr(9) & sampName I'16- 7)+%;|~ 'Open an output file and write the FRED header data Pr^p
^s Dim outFile As String .FAuM~_99b outFile = cDir & sampName & "_FRED.txt" {:d9q Open outFile For Output As #1 dq$CCOC^F Print #1, "type bsdf_data" G,b1 u" Print #1, "format angles=deg bsdf=value scale=1" <\5Y~!) r$.v"Wh) 'Loop the file list, skip the two header lines and write the remaining data to file ,4z?9@wQ Dim lineArray() As String, curLine As Long yzmwNsu For Each curFile In fList AehkEN&H/t Print "Merging data from file " & curFile ^5![tTJ ReadFile( cDir & curFile, lineArray ) H(Q|qckj For curLine = 2 To UBound(lineArray) H)&pay Print #1, lineArray(curLine) LC:bHM,e Next /Q[M2DN@ Next Pxm~2PAm t#[u
X? 'Close the output file az ?2 Close #1 )IP{yL8c k@= LR Print "Finished merging RPC data for sample " & sampName p~THliwd Print "FRED formatted data file: " & Chr(9) & outFile XZ8;Ow= End Sub L]HYk}oD. j;b<oQH 'Utility function to read the contents of a file into an array of strings. Ev;ocb, Function ReadFile(ByVal fileName As String, _ ZM%z"hO9R ByRef lineArray() As String) As Long R]{AJ"p qP0_#l& ReadFile = -1 B>&eciY Dim oFSO As Object ku}I;k | Set oFSO = CreateObject("Scripting.FileSystemObject") b,#E.%SLw Erase lineArray Qvd$fY**
S*1Km& Dim fid As Long )pXw 3Fo If oFSO.fileexists( fileName ) Then =
A !;`G fid = FreeFile() 1y5$ Open fileName For Input As fid ;hLne0|)} lineArray = Split(Input(LOF(fid), fid), vbCrLf) ~:%rg H Close fid MrA&xM End If 7+I2"Hy Set oFSO = Nothing &`'gO
9 Return UBound( lineArray ) ^L<*ggw ?=uw0~O[ End Function k98}Jx7J)" AQ 5CrYb Sub GetFileList( ByVal in_dir As String, _ o=
%Fh ByRef in_flist() As String ) '.wyfS H@ Y(]&j`% 'Redimension the file list array 9)qjW &` Erase in_flist 1Bz'$u;
&,Xs=Lvmq 'Tracks how many files are found $v6dB {%Qu Dim fCount As Long Z<#beT6 fCount = 0 THmX=K4=? 4JHFn [% 'Recurse directory and search for text files \8!&XcA Dim f As String ZC1U f = Dir$(in_dir & "*.txt") ?eb2T`\0Q While f <> "" >, &6zj ReDim Preserve in_flist(fCount) ;Db89Nc$ in_flist(fCount) = f snBC +`- fCount += 1 O>Nop5#o f = Dir$() %L./U$ Wend pAV}hB ReDim Preserve in_flist(fCount-1) s.rS06x OZ q/'* End Sub g'`J'6Pn
|