-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-11-19
- 在线时间1888小时
-
-
访问TA的空间加好友用道具
|
摘要: cM<08-:v :}q)]W 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。 yK"HHdYTV gw">xt5 背景: V@y&n1?6 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。 4M0p:Ey ' 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。 X,lhVT
| 图1. RPC Photonics工程漫射体结构及光束投射形状 :)4c_51 ` _V8;dv8 \R-'<kN.* 步骤 "E4CQL'U 0k_3]Li=( 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。 q-@&n6PEOZ B7Zi|-F 图2. RPC Photonics工程漫射体不同类型的散射数据 wi%ls8F 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) wSM(!:on5 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 AuM}L&`i^ 例如下所示: A42!%>PB Sample name: EDF-C1-56 $Fi1Bv) Merging data from file EDF-C1-56 0-0.txt (7&b)"y Finished merging RPC data for sample EDF-C1-56 6#qt%t%?D FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt ^xScVOdP 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 >[nR$8_J-l a. 创建一个新的散射库 ~e)"!r b. 散射模型命名 GjN6Af~} c. 改变散射模型为“Tabulated BSDF”. I#]pk! d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) ~gQYgv<7 e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 E{^W- f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, @.)[U:N g. 点击OK :AQ9-&i/a- 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 u"wWekB 9@mvG^ rXBCM 脚本代码: c4Q9foE
.kkhW8: '#Language "WWB-COM" !I&,!$ 9&6P,ts%Q Option Explicit U9Ea}aN ~J#Z7y]p!j Sub Main 'mm>E 1U^KN~! 'Cleanup A>mk0P)~Q ClearOutputWindow() cF EO} Jf#-OlEQ Print "Merging RPC Photonics BSDF Data Files" 8<ev5af SetTextColor(255,0,0) 8^_e>q*W Print "Note: Script should be located in the same folder as the BSDF TXT files." Lm<WT*@ Print "Note: Do not run this script multiple times without deleting the output file between executions." =[Z3]#h SetTextColor(0,0,0) @SaxM4 qUn+1.[% 'Current directory of this script (should be the same as the text files being merged) ^
uwth Dim cDir As String 3zc;_U2 cDir = MacroDir$ & "\" yh|+Usa (J%>{?"ij 'Array which will be populated with the list of files to be merged CvEIcm=t Dim fList() As String, curFile As String $b7@S`5 GetFileList( cDir, fList ) ,&fZo9J9 *WFd[cKE
Print ""
{gD`yoPrV Print "Files found for merging:" K:Z(jF!j For Each curFile In fList nqTOAL9FF Print Chr(9) & curFile {9Ok^O Next knpdECq&k BnDCK@+|Q 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. z!.cc6R Dim nameArray() As String, sampName As String F!4V!VWA} nameArray = Split(fList(0)," 0-0.txt") hd(TKFL^y sampName = nameArray(0) a<E9@ Print "" Dbq/t^ Print "Sample name: " & Chr(9) & sampName .!i`YT*jF >,_0Mem2Rr 'Open an output file and write the FRED header data 7|_2@4-W6 Dim outFile As String o-AF_N outFile = cDir & sampName & "_FRED.txt" e{XzUY6 Open outFile For Output As #1 JR&yaOws Print #1, "type bsdf_data" ">20`Mj8 Print #1, "format angles=deg bsdf=value scale=1" p&)d]oV> R?tjobk! 'Loop the file list, skip the two header lines and write the remaining data to file yx*<c#Uf Dim lineArray() As String, curLine As Long Of$R+n. For Each curFile In fList \IudS{
.?; Print "Merging data from file " & curFile \j BA4?(S ReadFile( cDir & curFile, lineArray ) a'n17d& For curLine = 2 To UBound(lineArray) CPeu="[ Print #1, lineArray(curLine) oe3=QE Next I _N:j,Mx
Next >ZeARCf"f 2dHsM'ze 'Close the output file K@*4=0 Close #1 ~t$ng l$ fOdqr Print "Finished merging RPC data for sample " & sampName dxH\H?NO Print "FRED formatted data file: " & Chr(9) & outFile .5s^a.e'O End Sub h;y}g/HZ C~"UOFX 'Utility function to read the contents of a file into an array of strings. V\e1NS Function ReadFile(ByVal fileName As String, _ ,S<) ) ByRef lineArray() As String) As Long )l!`k ;O{bF8U ReadFile = -1 /` nkz Dim oFSO As Object -Lb7=98 Set oFSO = CreateObject("Scripting.FileSystemObject") j(K)CHH Erase lineArray &
BY\h: ~3Zz.!F Dim fid As Long [F;\NJp6?^ If oFSO.fileexists( fileName ) Then Oo FMOlb.Z fid = FreeFile() \7#w@3* Open fileName For Input As fid x2r.4 lineArray = Split(Input(LOF(fid), fid), vbCrLf) ?$uF(>LD
Close fid
4~ L1~Gk End If 3;wiwN' Set oFSO = Nothing Q>9bKP Return UBound( lineArray ) 2+S+Y%~ Doq}UWp End Function #n15_cd !_~/Y/M Sub GetFileList( ByVal in_dir As String, _ }aI>dHL ByRef in_flist() As String ) YktZXc?iI< j72mm! 'Redimension the file list array nm]lPK U+Y Erase in_flist @'GPZpbvZ YjJ^SU`* 'Tracks how many files are found Am*lx Dim fCount As Long hx8pg,X fCount = 0 LHu p5w9X+G% 'Recurse directory and search for text files TX@ed Dim f As String eH!V%dX f = Dir$(in_dir & "*.txt") Bg zq While f <> "" *//z$la ReDim Preserve in_flist(fCount) *A8Et5HAv in_flist(fCount) = f <sM_zoprc fCount += 1 _*8 6 f = Dir$() _3wK: T{: Wend q
#7Nk)<.
ReDim Preserve in_flist(fCount-1) 5[r}'08b $cwmfF2C End Sub !b4AeiL>w /FpPf[ hA1B C3 QQ:2987619807 %zRuIDmv
|