-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-09
- 在线时间1894小时
-
-
访问TA的空间加好友用道具
|
摘要: Rf2;O< d,+d8X 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。 ~Ci|G3BW iHWl%]7sN 背景: Pou`PNvH 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。 ` *h-j/M 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。 5?%(j!p5 图1. RPC Photonics工程漫射体结构及光束投射形状 v#nYH?+~mJ I tp7X l#V"14y 步骤 l;F3kA YM/GSSq 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。 J=|fxR JX`+b 图2. RPC Photonics工程漫射体不同类型的散射数据 OAR#* ~q 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) IGOqV>; 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 :a[L-lr`e 例如下所示: 3dQV5E. Sample name: EDF-C1-56 qZG "{8 Merging data from file EDF-C1-56 0-0.txt QcIa%lf Finished merging RPC data for sample EDF-C1-56 Nt'(JAZ; FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt Xr6UN{_- 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 v; &-]ka a. 创建一个新的散射库 *";,HG?|Iz b. 散射模型命名 3-Xum*)Y c. 改变散射模型为“Tabulated BSDF”. 7b \Hbg 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 ) >N{K)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。 1^b-J0 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, egK,e?~ g. 点击OK mJ)o-BV 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 q.g<g u] [8(e`6xePb Iyz} ;7yVI 脚本代码: <Gr{h>b 8{(;s$H~ '#Language "WWB-COM" Gt2NUGU xQ-]Iw5 Option Explicit NYm2fFPc E,>/6AU Sub Main TmvI+AY/ \%K< S 'Cleanup
4b,N"w{v ClearOutputWindow() zdlysr# w|OMT>. Print "Merging RPC Photonics BSDF Data Files" AQDT6E: SetTextColor(255,0,0) b(wW;C'#0p Print "Note: Script should be located in the same folder as the BSDF TXT files." 4
B"tz! Print "Note: Do not run this script multiple times without deleting the output file between executions." Fi14_{ SetTextColor(0,0,0) >Ke4lO" am]$`7R5d 'Current directory of this script (should be the same as the text files being merged) *[) b}? Dim cDir As String 5<0&y3 cDir = MacroDir$ & "\" _%?}e|epy Rs$k3 'Array which will be populated with the list of files to be merged `$ql>k-6C Dim fList() As String, curFile As String <w}YD @(f GetFileList( cDir, fList ) PxhB=i!'$ C{`+h163\ Print "" t,gKN^P_ Print "Files found for merging:" <7~HG(ks For Each curFile In fList !iN=py Print Chr(9) & curFile K.Nun)< Next e23}'qb {0 IEizQ|i 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. !_3Rd S Dim nameArray() As String, sampName As String 6}qp;mR
E] nameArray = Split(fList(0)," 0-0.txt") :aS8%m sampName = nameArray(0) H~Xi;[{7 Print "" kAsYh4[ Print "Sample name: " & Chr(9) & sampName <5%x3e"7u wR@&C\}9 'Open an output file and write the FRED header data U p=J&^. Dim outFile As String .]SE>3 outFile = cDir & sampName & "_FRED.txt" /o Q^j'v Open outFile For Output As #1 $p#)xx7 Print #1, "type bsdf_data" u [5*RTE Print #1, "format angles=deg bsdf=value scale=1" A.8{LY; fjVGps$j 'Loop the file list, skip the two header lines and write the remaining data to file ;7Cb!v1 Dim lineArray() As String, curLine As Long kTZ`RW&0 For Each curFile In fList aKkL0D Print "Merging data from file " & curFile j
qfxQ ReadFile( cDir & curFile, lineArray ) }pxMO? h$ For curLine = 2 To UBound(lineArray) xdGmiHN Print #1, lineArray(curLine) FR"yGx#$ Next ZV=O oLt, Next ca%s$' d L 1iA
^x 'Close the output file Y3KKskhLx Close #1 z UN&L7D P(D0ru Print "Finished merging RPC data for sample " & sampName CT(VV6I\ Print "FRED formatted data file: " & Chr(9) & outFile In<L?U?([D End Sub \X1?,gV_ |)`<D 'Utility function to read the contents of a file into an array of strings. E_ #MQ;n Function ReadFile(ByVal fileName As String, _ }i0(^"SoXZ ByRef lineArray() As String) As Long lMoi5q <mN.6@*{ ReadFile = -1 |+K3\b Dim oFSO As Object \ t4:(Jp 3 Set oFSO = CreateObject("Scripting.FileSystemObject") Z7>pz:, Erase lineArray ?"-%>y@w v0Ww~4|], Dim fid As Long M#ED49Dh> If oFSO.fileexists( fileName ) Then !ZlBM{C fid = FreeFile() 6%?bl{pNn Open fileName For Input As fid l-4+{6lz lineArray = Split(Input(LOF(fid), fid), vbCrLf) HQqnJ;ns< Close fid %zDh07VT\ End If |&!04~s;E Set oFSO = Nothing J=v"
HeVm Return UBound( lineArray ) c4H5[LPF [HNWM/ff7+ End Function R{={7.As+ H5wzzSV!:B Sub GetFileList( ByVal in_dir As String, _ eb%`ox@& ByRef in_flist() As String ) a^wGc+ B.
'&[A 'Redimension the file list array ffDh0mDN Erase in_flist )*6]m1 XL
SYE
'Tracks how many files are found qI (<5Wxl Dim fCount As Long ]rk8Jsg fCount = 0 sv}k_6XgY BCUn[4Gp 'Recurse directory and search for text files E&js`24 & Dim f As String N_<wiwI< f = Dir$(in_dir & "*.txt")
k/'>,WE While f <> "" (|Zah1k&] ReDim Preserve in_flist(fCount) o!bIaeEaU in_flist(fCount) = f ]nmVT~lBe" fCount += 1 vq(ElXTO f = Dir$() 0_\@!#-sml Wend {DfXn1Cg0U ReDim Preserve in_flist(fCount-1) &?[uY5Mk V!^5#A< End Sub 1dsMmD[O E+'P|~>oX -l)u`f^n| QQ:2987619807 uB&um*DP
|