-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2026-06-05
- 在线时间1977小时
-
-
访问TA的空间加好友用道具
|
摘要: mXT{c=N)w Um!LF"Z 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。 0`4Fa^o]h ]D_
AZI 背景: uoq|l 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。 )uO 3v 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。 CqLAtS X7 图1. RPC Photonics工程漫射体结构及光束投射形状 kS62]v] b"(bT6XO! LIRL`xU7 步骤 PTpGZ2FZ H,(4a2zx 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。 ?
@- t.N ua!RwSo 图2. RPC Photonics工程漫射体不同类型的散射数据 2OwO|n 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) %'MR;hQsd8 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 ]RuH6d2d| 例如下所示: vMYEP_lhK, Sample name: EDF-C1-56 [Qn=y/._r Merging data from file EDF-C1-56 0-0.txt V!f'
O@p[ Finished merging RPC data for sample EDF-C1-56 u>.>hQ FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt rsD?
;XzH 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 /Z2 g> a. 创建一个新的散射库 7
V=%&+ b. 散射模型命名 `aL4YH-v c. 改变散射模型为“Tabulated BSDF”. MC_i"P6a 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 ) LIh71Vg/cc 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。 l(3\ekU! 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, V4. }wz_Y g. 点击OK -:Jn|= 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 ui&^ m, n ==+NL oF.H?lG7` 脚本代码: jN%+)Kj0C) l j %k/u '#Language "WWB-COM" 4EFP*7X !}J19]\ Option Explicit wV"C ,*V 7jPn6uz>w Sub Main m8 Ti{w( aFDCVm%U| 'Cleanup pbNW
l/|4 ClearOutputWindow() {\5-b:#_ S %(R9N| Print "Merging RPC Photonics BSDF Data Files" 7VA6J-T SetTextColor(255,0,0) |dqvv Print "Note: Script should be located in the same folder as the BSDF TXT files." u`wT_?%w Print "Note: Do not run this script multiple times without deleting the output file between executions." PF]Vt SetTextColor(0,0,0) XaYgl&x'!x ;Rd\yAG 'Current directory of this script (should be the same as the text files being merged) KDYyLkI dr Dim cDir As String 6'JP%~QlS cDir = MacroDir$ & "\" y:dwx *Q9I Ts3(,Y 'Array which will be populated with the list of files to be merged `bEum3l\6] Dim fList() As String, curFile As String !gG\jC~n GetFileList( cDir, fList ) b*o,re)Dj nXxSv~r Print "" .iH#8Z
Print "Files found for merging:" 3bMUsyJ 2 For Each curFile In fList kA(q-Re$B* Print Chr(9) & curFile BXX1G Next bn8?- Tp%4{U/0` 'Split the first text file name found to get the sample name. First file should be 0-0 measurement.
g<PdiVp+ Dim nameArray() As String, sampName As String 2O)2#N nameArray = Split(fList(0)," 0-0.txt") f n'N^ sampName = nameArray(0) 2s8(r8 AI Print "" Y\ G^W8 Print "Sample name: " & Chr(9) & sampName TkV$h(#!f& l%9nA.M' 'Open an output file and write the FRED header data :Qklbd[9qF Dim outFile As String aoS]Qp outFile = cDir & sampName & "_FRED.txt" |cq%eN Open outFile For Output As #1 von~-51; Print #1, "type bsdf_data" 4!tHJCq" Print #1, "format angles=deg bsdf=value scale=1" g63?(+Fz -}r(75C 'Loop the file list, skip the two header lines and write the remaining data to file ti9cfv> Dim lineArray() As String, curLine As Long xn)r6 For Each curFile In fList .
G ~,h Print "Merging data from file " & curFile =Pgu?WU@ ReadFile( cDir & curFile, lineArray ) z/t:gc. For curLine = 2 To UBound(lineArray) }V
%b Print #1, lineArray(curLine) Y&_1U/}h Next O5p]E7/e Next P1mPC r&-Ir3[ 'Close the output file ?#X`Eu Close #1 aXefi'!6 S+C^7# lT Print "Finished merging RPC data for sample " & sampName 6'N!)b^- Print "FRED formatted data file: " & Chr(9) & outFile Q{Lsr, End Sub 5-pz/%, O[fgn;@| 'Utility function to read the contents of a file into an array of strings. DeTZl+qm1E Function ReadFile(ByVal fileName As String, _ GQ8r5V4: ByRef lineArray() As String) As Long .o5r;KD D;Jb'Be ReadFile = -1 g1`/xJz| Dim oFSO As Object ,/g\;#:{@] Set oFSO = CreateObject("Scripting.FileSystemObject") c=p @l<) Erase lineArray Cz_chK4 {1
94u%' Dim fid As Long k&P_ c If oFSO.fileexists( fileName ) Then WwDxZ>9jw fid = FreeFile() Y">;2Pt; Open fileName For Input As fid 8}W06k>)% lineArray = Split(Input(LOF(fid), fid), vbCrLf) 3f:I<S7 Close fid Xsc5@O! End If UI:{*N**Z Set oFSO = Nothing `$\Y,9E}x Return UBound( lineArray ) p=(;WnsK :/IcFU~)M End Function bMD'teJ %?EOD=e= Sub GetFileList( ByVal in_dir As String, _ "ppT<8Qi' ByRef in_flist() As String ) TPds )osZT D4r5wc% 'Redimension the file list array 'gojP Erase in_flist FZ/l
T-" <nj[=C4v 'Tracks how many files are found %zyMWC Dim fCount As Long (K+TqJw fCount = 0 [#td >1tGQ
cg 'Recurse directory and search for text files O.E Dim f As String r Q'tab.,] f = Dir$(in_dir & "*.txt") [j0I}+@4H While f <> "" @"HR"@pX ReDim Preserve in_flist(fCount) Wx/!Myu in_flist(fCount) = f ?8(`tS(_? fCount += 1 >{4pEy f = Dir$() tGd<{nF% 2 Wend Hk\+;'PrN ReDim Preserve in_flist(fCount-1) g}3c r. 7-ba-[t#A End Sub )B*?se]LJ
|