-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-04-02
- 在线时间1761小时
-
-
访问TA的空间加好友用道具
|
摘要: rSYi<ku ]@Sj`J[fd 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。 b
pv=% w/L ` 背景: $t/x;<.H Thorlabs和RPC Photonics联手共同推出的新型漫射体及光束整形技术,可以解决其他技术的不足,大大改善了诸如光刻系统、有效固态照明,显示,背光,显示亮度增强和投影屏等大多数应用的性能。这项我们称之为工程漫射体(Engineered DiffusersTM)的新概念,与其他技术有许多不同。与诸如磨砂玻璃、乳色玻璃和全息元件等随机漫射体截然不同,工程漫射体要求对于每个散射中心,通常为微透镜单元,都进行控制。例如全息漫射体可以视为一组随机排列的透镜,但是通过全息曝光形成的类透镜效果只能通过静态方式进行控制:而无法单独操控每个微透镜单元,这也帮助解释了全息漫射体无法控制光的分布和轮廓。另一方面,在工程漫射体中,每个微透镜单元形成漫射体,由其凹形纵断面和在阵列中的位置所确定。同时,为了确保漫射体不受输入光束变化的影响,并且不产生衍射效果,微透镜单元的分布是随机的,根据产生相应的光束形状函数所选取的概率分布函数来确定。因此,工程漫射体同时保留了随机与确定性漫射体的优点,从而实现高性能的光束整形功能。 \8uIER5) FRED是美国Photon Engineering 公司开发的光学工程仿真软件,其在杂散光分析中独特的算法、高效的准确性,使其与其它同类产品相比更具优势。本案例我们重点讲述如何由RPC Photonics的BSDF数据转为FRED可识别的散射数据。 =H|6 GJ 图1. RPC Photonics工程漫射体结构及光束投射形状 i9=&;_z XQ*eP?OS{ #A8@CA^d 步骤 C
XHy.&Vt 3T&6opaF 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 Xo*DvD z.rh]Zq 图2. RPC Photonics工程漫射体不同类型的散射数据 z;u 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) ,[A'tUl _ 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 (os$B 例如下所示: 46k?b|Q Sample name: EDF-C1-56 N&[D>G]>v Merging data from file EDF-C1-56 0-0.txt NuU9~gSQ Finished merging RPC data for sample EDF-C1-56 boo
}u FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt Sc7U|s 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 oc^Br~ Th a. 创建一个新的散射库 dZ _zg< b. 散射模型命名 4hw@yTUo c. 改变散射模型为“Tabulated BSDF”. [NFNzwUB 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 ) t&9A
]<n%, 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。 RQFI'@Ks 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, #Eb5: ; g. 点击OK Nl')l" 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 jP~Z`yf BIj=!! ;@
[
0x 脚本代码: jzK5-;b (8ht*b.5K '#Language "WWB-COM" [le)P$#z FE o269Ur Option Explicit uf&N[M |X`/ Sub Main LOTP*Syjf
=~I-]4 'Cleanup ?<*-j4v ClearOutputWindow() M3~K,$@ |+$%kJR= Print "Merging RPC Photonics BSDF Data Files" w}{5# SetTextColor(255,0,0) x2QIPUlf Print "Note: Script should be located in the same folder as the BSDF TXT files." KLX/O1B Print "Note: Do not run this script multiple times without deleting the output file between executions." V)P&Zw SetTextColor(0,0,0) ;sch>2&ZWU Jxqh)l 'Current directory of this script (should be the same as the text files being merged) }$\M{#C~ Dim cDir As String xm6 EKp: cDir = MacroDir$ & "\" &P,^.'
.Gcy>Av 'Array which will be populated with the list of files to be merged pZyQY+O Dim fList() As String, curFile As String _sy'.Fo GetFileList( cDir, fList ) CU7F5@+ QKE9R-KTE Print "" R<x'l=,D( Print "Files found for merging:" {s3z"OV For Each curFile In fList [&*6_q"V Print Chr(9) & curFile }Yv\0\~'W| Next ~}ET?Q7t >*$; 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. >h+349 Dim nameArray() As String, sampName As String B4XZko( nameArray = Split(fList(0)," 0-0.txt") mQ}ny (K' sampName = nameArray(0) kw`WH)+F Print "" kbPE "urR Print "Sample name: " & Chr(9) & sampName U=8@@yE B-d(@7,1 'Open an output file and write the FRED header data RwVaZJe)l Dim outFile As String VGqa)ri" outFile = cDir & sampName & "_FRED.txt" yFhB>i Open outFile For Output As #1 _owjTo} Print #1, "type bsdf_data" `c+/q2M Print #1, "format angles=deg bsdf=value scale=1" \ (p{t {RB-lfrWs 'Loop the file list, skip the two header lines and write the remaining data to file 7DlOW1| Dim lineArray() As String, curLine As Long h3gWOU For Each curFile In fList vKoP|z=m Print "Merging data from file " & curFile =e?$ M ReadFile( cDir & curFile, lineArray ) TEsnN i
1 For curLine = 2 To UBound(lineArray) dC}`IR Print #1, lineArray(curLine) !AJ]j|@VBd Next
,YhwpkL Next UhmTr[& wY"o`oZ 'Close the output file dGwszziuK Close #1 @DC)]C2 oVCmI"' Print "Finished merging RPC data for sample " & sampName *V(Fn-6( Print "FRED formatted data file: " & Chr(9) & outFile 6b~28 End Sub z<]bv7V U/;]zdP.K 'Utility function to read the contents of a file into an array of strings. amQz^^ Function ReadFile(ByVal fileName As String, _ %i)B*9k ByRef lineArray() As String) As Long 2i|B=D( 9N[EZhW ReadFile = -1 xv7"WFb Dim oFSO As Object 2=ztKfsBhE Set oFSO = CreateObject("Scripting.FileSystemObject") Kt#,]] Erase lineArray a <X0e> -v?hqWMp# Dim fid As Long [&Hkn5yq If oFSO.fileexists( fileName ) Then z1,tJH0 fid = FreeFile() mCKk*5ws5" Open fileName For Input As fid q 6`G I6 lineArray = Split(Input(LOF(fid), fid), vbCrLf) }jF+`!*! Close fid GJ'spgz End If xn}BB}s{t Set oFSO = Nothing ep(g`e Return UBound( lineArray ) VF0dE !NKmx=I] End Function pJ,@Y> \Btk;ivg Sub GetFileList( ByVal in_dir As String, _ !PUp>( ByRef in_flist() As String ) rn.\tDeA p
SN~DvR 'Redimension the file list array lu UYo Erase in_flist y,+[$u7h e<gx~N9l' 'Tracks how many files are found AH{^spD{7, Dim fCount As Long 4}KU>9YRA fCount = 0 |kiJ}oy Gk~l,wV> 'Recurse directory and search for text files #WE]`zd Dim f As String 6!EYrX}rI[ f = Dir$(in_dir & "*.txt") oUW<4l While f <> "" INMP"1 ReDim Preserve in_flist(fCount) [~Hg}-c in_flist(fCount) = f gp|1?L54 fCount += 1 B94
&elu f = Dir$() qg,Nb Wend @Z\2* 1y6 ReDim Preserve in_flist(fCount-1) [EHrIn ?)tK!' End Sub e-D4'lu
|