-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-09-29
- 在线时间1866小时
-
-
访问TA的空间加好友用道具
|
摘要: O%>FKU>(? |JR;E$ 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。 Zi!6dl ev $bGe1\ 背景: 5S;|U&f| Thorlabs和RPC Photonics联手共同推出的新型漫射体及光束整形技术,可以解决其他技术的不足,大大改善了诸如光刻系统、有效固态照明,显示,背光,显示亮度增强和投影屏等大多数应用的性能。这项我们称之为工程漫射体(Engineered DiffusersTM)的新概念,与其他技术有许多不同。与诸如磨砂玻璃、乳色玻璃和全息元件等随机漫射体截然不同,工程漫射体要求对于每个散射中心,通常为微透镜单元,都进行控制。例如全息漫射体可以视为一组随机排列的透镜,但是通过全息曝光形成的类透镜效果只能通过静态方式进行控制:而无法单独操控每个微透镜单元,这也帮助解释了全息漫射体无法控制光的分布和轮廓。另一方面,在工程漫射体中,每个微透镜单元形成漫射体,由其凹形纵断面和在阵列中的位置所确定。同时,为了确保漫射体不受输入光束变化的影响,并且不产生衍射效果,微透镜单元的分布是随机的,根据产生相应的光束形状函数所选取的概率分布函数来确定。因此,工程漫射体同时保留了随机与确定性漫射体的优点,从而实现高性能的光束整形功能。 b8>2Y'X FRED是美国Photon Engineering 公司开发的光学工程仿真软件,其在杂散光分析中独特的算法、高效的准确性,使其与其它同类产品相比更具优势。本案例我们重点讲述如何由RPC Photonics的BSDF数据转为FRED可识别的散射数据。 l'K3)yQEJ 图1. RPC Photonics工程漫射体结构及光束投射形状 53i7:1[uV N?RJuDW T!iRg=<bz 步骤 M)<4|x ]tu:V,q 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 A#WvN> S~Z`?qHWh 图2. RPC Photonics工程漫射体不同类型的散射数据 jn+M L& 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) gvoo1 Sa 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 NIzxSGk| 例如下所示: N9[2k.oBH Sample name: EDF-C1-56 tW=,o&C= Merging data from file EDF-C1-56 0-0.txt @S-p[u Finished merging RPC data for sample EDF-C1-56 09r0Rb FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt SviGLv;oR 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 hPM:=@N$ a. 创建一个新的散射库 bR0 z$~ b. 散射模型命名 /.Fvl;!J; c. 改变散射模型为“Tabulated BSDF”. }gfs d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) B <CK~ybY e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 d{gj8 f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, nVK`H@5fw g. 点击OK z .xOT;t 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 =VctG>ct| '(qVA>S 'u%;5;%2 脚本代码: <21@jdu3n, ?puZqVu5 '#Language "WWB-COM" ~I_v { V*|#j0}b Option Explicit 60A
E~ MmvMuX]#) Sub Main e@GR[0~ DH5]Kzb/ 'Cleanup W8/8V, ClearOutputWindow() +(*;F4> v)TFpV6b{p Print "Merging RPC Photonics BSDF Data Files" 2u>
[[U1: SetTextColor(255,0,0) tSZd0G<A<o Print "Note: Script should be located in the same folder as the BSDF TXT files." fuwv,[m Print "Note: Do not run this script multiple times without deleting the output file between executions." "(U%Vg|) SetTextColor(0,0,0) xD(RjL+ oI!L2 'Current directory of this script (should be the same as the text files being merged) Yy_o*Ozq Dim cDir As String Vd' KN2Jm cDir = MacroDir$ & "\" UT^-!L
LB] |.s#m^" 'Array which will be populated with the list of files to be merged K?4/x4p@ Dim fList() As String, curFile As String Dn}Wsd= GetFileList( cDir, fList ) e2onR~Cf S!/N
lSr< Print "" /!u#S9_B Print "Files found for merging:" d+6 by,' For Each curFile In fList oQkY@)3.w Print Chr(9) & curFile F$;vPAxbK" Next 1 o;*` @rTAbEk{U 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. ]{[8$|Mg Dim nameArray() As String, sampName As String 6]#\|lds1 nameArray = Split(fList(0)," 0-0.txt") iTt#%Fs)4M sampName = nameArray(0) nt"8kv Print "" jv"^_1 Print "Sample name: " & Chr(9) & sampName xyoh
B#'W [~
Wiy3n 'Open an output file and write the FRED header data Fe4QWB6\U Dim outFile As String T}?vp~./ outFile = cDir & sampName & "_FRED.txt" 2WA =U] Open outFile For Output As #1 &|:T+LVv$+ Print #1, "type bsdf_data" s 4Mi9h_ Print #1, "format angles=deg bsdf=value scale=1" ""dX4^gtU ic"n*SZa 'Loop the file list, skip the two header lines and write the remaining data to file 6iozb~!Rr Dim lineArray() As String, curLine As Long UacGq, For Each curFile In fList Tz=YSQy$9 Print "Merging data from file " & curFile /R_*u4}iD ReadFile( cDir & curFile, lineArray ) $rZ:$d.C For curLine = 2 To UBound(lineArray) `f@VX
:aL} Print #1, lineArray(curLine) )A`Zgg'L7D Next :\0q\2e[< Next rQncW~ I)$of9 'Close the output file NMSpi[dr Close #1 Z UvA` ?|i6]y=D Print "Finished merging RPC data for sample " & sampName n&. bs7N2 Print "FRED formatted data file: " & Chr(9) & outFile =,aWO7Pz End Sub j15TavjGh [7gyF}*; 'Utility function to read the contents of a file into an array of strings. h=q%h8 Function ReadFile(ByVal fileName As String, _ U`j[Ni}" ByRef lineArray() As String) As Long IH$R XGL 3X+uJb2 ReadFile = -1 !lSxBr[dQ Dim oFSO As Object x04JU$@ Set oFSO = CreateObject("Scripting.FileSystemObject") a<.7q1F Erase lineArray ^6?NYHMr= cx]O#b6B. Dim fid As Long dYg}qad5: If oFSO.fileexists( fileName ) Then a0"gt"qA fid = FreeFile() 2p( M`@ Open fileName For Input As fid (8!#<$ lineArray = Split(Input(LOF(fid), fid), vbCrLf) -%XvWZvZ Close fid lR!Sdd} - End If zS Yh ?NB5 Set oFSO = Nothing ZCQ7xQD Return UBound( lineArray ) 7'[C+/: D_6GzgZ End Function v-85`h Nxu10 Sub GetFileList( ByVal in_dir As String, _ L3Leb%,! ByRef in_flist() As String ) n6gYZd c<V.\y0x 'Redimension the file list array k'N `5M) Erase in_flist ?VMj;+'tr p}KZ#"Q 'Tracks how many files are found _tR%7%3* Dim fCount As Long &jg |