-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-12-04
- 在线时间1893小时
-
-
访问TA的空间加好友用道具
|
摘要: xCTPsw]s .91@T. 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。 rGDx9KR4K! L^E#"f 背景: R\T1R"1 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。 7ciSIJ 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。 E3vYVuw 图1. RPC Photonics工程漫射体结构及光束投射形状 _TbQjE&6 p[^a4E_v ]I^b&N 步骤 `uh+d oE.59dx 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。 yQz6K6p `k;MGs)& 图2. RPC Photonics工程漫射体不同类型的散射数据 Kj{(jT 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) p!Xn iY 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
*}h#'+ 例如下所示: V1-URC24vd Sample name: EDF-C1-56 ,L&d\M"f Merging data from file EDF-C1-56 0-0.txt S.,5vI"s, Finished merging RPC data for sample EDF-C1-56 omoD+ FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt .+d.~jHX 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 ]#sF
pWI[N a. 创建一个新的散射库 nRHxbE}:: b. 散射模型命名 =pk5'hBAi c. 改变散射模型为“Tabulated BSDF”. +5i~}Q! 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 ) rNN,! 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。 f`vu+nw 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, n@te.,?A" g. 点击OK T
B(K&3_D 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 `i5 \(cdl -]. a0 $<da<}b 脚本代码: KD* xFap L/c`t7 '#Language "WWB-COM" HD_ #-M HT%'dZ1 Option Explicit csjCXT=Ve 3j7Na#<tL3 Sub Main <8iu :nR b!4Z~d0= 'Cleanup 6>NK2} ` ClearOutputWindow() K41Gn K0fuN)C Print "Merging RPC Photonics BSDF Data Files" 5"9'=LV~ SetTextColor(255,0,0) N?s`a;Q[= Print "Note: Script should be located in the same folder as the BSDF TXT files." [/Sk+ID Print "Note: Do not run this script multiple times without deleting the output file between executions." -{z<+(K!$ SetTextColor(0,0,0) G0Y]-*1 ,<s/K 'Current directory of this script (should be the same as the text files being merged) )#l&BV5 Dim cDir As String tjg?zlj cDir = MacroDir$ & "\" M(U<H;Csk LsxRK5 'Array which will be populated with the list of files to be merged QAzwNXE+ Dim fList() As String, curFile As String VOSq%hB GetFileList( cDir, fList ) gvFs$X*^: ]4onY> Print "" -2B3 xIZJ Print "Files found for merging:" S|
|OSxZ For Each curFile In fList /hSEm.< Print Chr(9) & curFile Vji:,k=3\ Next aQ*?L
l |,Kk#`lW<f 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. 5p]V/<r Dim nameArray() As String, sampName As String Aa+<4
R nameArray = Split(fList(0)," 0-0.txt") {BY(zsl sampName = nameArray(0) r
m Print "" VDFs.;:s Print "Sample name: " & Chr(9) & sampName <Rfx`mn &3$FkU^F6 'Open an output file and write the FRED header data #.{ddY{ Dim outFile As String }R!t/8K outFile = cDir & sampName & "_FRED.txt" ;(@' +" Open outFile For Output As #1 Vg~10Q Print #1, "type bsdf_data" gsYQ"/S9 Print #1, "format angles=deg bsdf=value scale=1" ye-[l7 "*LQr~k~} 'Loop the file list, skip the two header lines and write the remaining data to file \h/)un5 Dim lineArray() As String, curLine As Long M%Zh{ For Each curFile In fList >dJ[1s] Print "Merging data from file " & curFile wGw<z[:f ReadFile( cDir & curFile, lineArray ) L{0\M`B- For curLine = 2 To UBound(lineArray) 22/"0=2g Print #1, lineArray(curLine) . @0@Y Next T"3:dkQw Next 'cqY-64CJZ 26}fB 'Close the output file >d(:XP6J Close #1 sI6I5 g:s|D
hE[ Print "Finished merging RPC data for sample " & sampName J1w,;T\55 Print "FRED formatted data file: " & Chr(9) & outFile Dy*K;e-+ End Sub 2UG>(R: d;nk>6<| 'Utility function to read the contents of a file into an array of strings. L d{`k Function ReadFile(ByVal fileName As String, _ `CRF E5 ByRef lineArray() As String) As Long [A'e7Do%' WRrg5&._q ReadFile = -1 Lvrflx*Q Dim oFSO As Object hka%!W5 Set oFSO = CreateObject("Scripting.FileSystemObject") vVZ+u4y Erase lineArray 5me#/NqLHY :31?Z(fQ Dim fid As Long 55ft,a If oFSO.fileexists( fileName ) Then N cp fid = FreeFile() <'4 8mip Open fileName For Input As fid klMpiy lineArray = Split(Input(LOF(fid), fid), vbCrLf) D!8v$(#hR Close fid l.(|& |