-
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: VPqMbr"L[ &i%1\o 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。 K JX@?1" Z-B b,8 背景: #-Ad0/ 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。 *.ZU" 5e 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。 <UMT:`h1MZ 图1. RPC Photonics工程漫射体结构及光束投射形状 WbP*kV{ s55t>t,g6 '{(/C?T 步骤 :[ AP^ Ee?+IZ H7| 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。 dn)pVti_
?Ok@1 图2. RPC Photonics工程漫射体不同类型的散射数据 =ap6IVR 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) b[_${in: 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 8${Yu 例如下所示: r9d dVD Sample name: EDF-C1-56 @ dF]X Merging data from file EDF-C1-56 0-0.txt qTl/bFD Finished merging RPC data for sample EDF-C1-56 Pqm)OZE? FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt 3!V$fl0 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 q"Z!}^{ a. 创建一个新的散射库 Y?>us b. 散射模型命名 _p`@/[(| c. 改变散射模型为“Tabulated BSDF”. P.;S6i
n 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 ) @\UoZv( 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。 \1p5$0z f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, ;y{VdT g. 点击OK }_{QsPx9 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 sUP!'Av \O7Vo<B&D FTg4i\Wp 脚本代码: S=wJ{?gzAK ]O;Hlty(g '#Language "WWB-COM" AIXvS*Y, !dW77kLTg Option Explicit 2%DleR'i J '^xDIZX Sub Main 7q] @Jx9 Twj?SV 'Cleanup /<s$Am ClearOutputWindow() @}e'(ju%R iWN-X
( Print "Merging RPC Photonics BSDF Data Files" T"GuE[?a SetTextColor(255,0,0) /@.c
59r Print "Note: Script should be located in the same folder as the BSDF TXT files." Yv`8{_8L Print "Note: Do not run this script multiple times without deleting the output file between executions." +H K)A%QI SetTextColor(0,0,0) !j3V'XU#Zn dLSnhZ 'Current directory of this script (should be the same as the text files being merged) cc%O35o Dim cDir As String Y)@PGxjz cDir = MacroDir$ & "\" .2b) rKo~ ,ZYj8^gF 'Array which will be populated with the list of files to be merged {xC CUU Dim fList() As String, curFile As String elgCPX&:W GetFileList( cDir, fList ) F)0I7+lP ikGH:{ Print "" 3PonF4 Print "Files found for merging:" wnE
c
For Each curFile In fList P'Fy,fNg Print Chr(9) & curFile e<>Lr Next >t"]gQHtx p.2>-L 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. LaE;{ jY Dim nameArray() As String, sampName As String id-VoHdK nameArray = Split(fList(0)," 0-0.txt") / -=(51}E sampName = nameArray(0) Z w5\{Z0 Print "" s'^zudx Print "Sample name: " & Chr(9) & sampName a .5s5g)8 ~PNO|]8j 'Open an output file and write the FRED header data X*~NE\ Dim outFile As String
:*M\z3`k outFile = cDir & sampName & "_FRED.txt" ]k mOX Open outFile For Output As #1 /s%I(iP4 Print #1, "type bsdf_data" $p4aNC Print #1, "format angles=deg bsdf=value scale=1" y0qE::/H$ 6,xoxNoPP3 'Loop the file list, skip the two header lines and write the remaining data to file (oxe\Qk Dim lineArray() As String, curLine As Long xQ7n$.?y@ For Each curFile In fList s9A'{F Print "Merging data from file " & curFile ISr~JQr ReadFile( cDir & curFile, lineArray ) 13Z6dhZu For curLine = 2 To UBound(lineArray) J1<fE(X Print #1, lineArray(curLine) 4[3T%jA Next oQDOwM, Next 9ok|]d P HHZ!mYr 'Close the output file *eXO?6f%s^ Close #1 7atYWz~yG vc2xAAQ Print "Finished merging RPC data for sample " & sampName
F!>K8 q Print "FRED formatted data file: " & Chr(9) & outFile nRQIrUNq End Sub g]xZ^M+ l@*/1O)v 'Utility function to read the contents of a file into an array of strings. #|XEBOmsQ Function ReadFile(ByVal fileName As String, _ 3i(k6)H$4 ByRef lineArray() As String) As Long ~~1~ _0?e *vhm ReadFile = -1
n @L!{zY Dim oFSO As Object A2&&iL=j/ Set oFSO = CreateObject("Scripting.FileSystemObject") b=T+#Jb Erase lineArray %FFw!eVi H>XbqIkL@ Dim fid As Long YLd
5 If oFSO.fileexists( fileName ) Then o33{tUp' fid = FreeFile() zFi+6I$ Open fileName For Input As fid 8VcAtrx_ lineArray = Split(Input(LOF(fid), fid), vbCrLf) CES FkAj~ Close fid <(p1
j0_Q End If GP1>h.J Set oFSO = Nothing N/?MsrZw Return UBound( lineArray ) _R(5?rG, n'*L jp End Function $fKwJFr !v;r3*#Nky Sub GetFileList( ByVal in_dir As String, _ 2K*-uT#$~ ByRef in_flist() As String ) uWnS<O Aq'%a)Y2 'Redimension the file list array ~POeFZ Erase in_flist oZCi_g 5i KR^peWR 'Tracks how many files are found PYHm6'5BtB Dim fCount As Long Bhq(bV fCount = 0 ` `;$Kr Ok`U*j 'Recurse directory and search for text files hTG
d Uw] Dim f As String ^Js9E f = Dir$(in_dir & "*.txt") ^LU[{HZV While f <> "" uBE,z>/,; ReDim Preserve in_flist(fCount) H4:TYh in_flist(fCount) = f :
m5u=:t fCount += 1 @J<B^_+Se f = Dir$() Na~_=3+a Wend ;5|EpoM ReDim Preserve in_flist(fCount-1) fd,~Yj$R? g?$9~/h :; End Sub ONGe/CEXT
|