-
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: BF(Kaf;<t. 7s2e>6Q[ 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。 m8z414o \)+s)&JLb 背景: ]3~X!(O 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。 ($s%B FRED是美国Photon Engineering 公司开发的光学工程仿真软件,其在杂散光分析中独特的算法、高效的准确性,使其与其它同类产品相比更具优势。本案例我们重点讲述如何由RPC Photonics的BSDF数据转为FRED可识别的散射数据。 2VgVn,c 图1. RPC Photonics工程漫射体结构及光束投射形状 H 2UR 1l+j^Dt'[ kg()C%#u
步骤 j?s+#t i&zJwUr(< 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 J85Kgd1
\a Vf`9[*j 图2. RPC Photonics工程漫射体不同类型的散射数据 S3Sn_zqG 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) F!&_ 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集
4d )Q 例如下所示: RLUH[[ Sample name: EDF-C1-56 =d1R9O Merging data from file EDF-C1-56 0-0.txt i`vgD<} Finished merging RPC data for sample EDF-C1-56 AGgL`sP FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt S0mF%" 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 )!C|DSw a. 创建一个新的散射库 #)28ESj b. 散射模型命名 %|gj46 c. 改变散射模型为“Tabulated BSDF”. Iw;J7[hJ&$ 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 ) Xd@x(T~'X 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。 `I)ftj% 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, qh~S)^zFJ g. 点击OK tC'@yX 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 w\Bx=a>vc etLA F I,YP{H 4 脚本代码: ]5hGSl2
O^I%Xk '#Language "WWB-COM" * 57y.](w x2 m
A Option Explicit 8CN0Q&| 7d'gG[Z^^ Sub Main 1
Ll<^P 2Uq4PCx! 'Cleanup *q+z5G;O ClearOutputWindow() \`,,r_tO o&vODs Print "Merging RPC Photonics BSDF Data Files" oB] SetTextColor(255,0,0) *WX,bN6Ot Print "Note: Script should be located in the same folder as the BSDF TXT files." B:QAG Print "Note: Do not run this script multiple times without deleting the output file between executions." H:&|q+K=# SetTextColor(0,0,0) $ h<l Y]!{
nW 'Current directory of this script (should be the same as the text files being merged) V;t8v\ Dim cDir As String %$.]g cDir = MacroDir$ & "\" @Zd/>' ILq"/S. 'Array which will be populated with the list of files to be merged ]@UJ 8hDy Dim fList() As String, curFile As String tr$~INe GetFileList( cDir, fList ) 84$#!=v ,c\3b)ax Print "" l~9P4
, Print "Files found for merging:" 7Yrp#u1! For Each curFile In fList 3gzcpFNqX Print Chr(9) & curFile d)X6x-( Next p 6FPdt) qC?\i['` 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. ]$gBX= Dim nameArray() As String, sampName As String Sxw%6Va]p nameArray = Split(fList(0)," 0-0.txt") 4,pS C sampName = nameArray(0) T2V#
fYCc Print "" xX]92Q Print "Sample name: " & Chr(9) & sampName s=xJcLA crdp`}} 'Open an output file and write the FRED header data (o5+9'y"9 Dim outFile As String U~e^ outFile = cDir & sampName & "_FRED.txt" ,awp)@VG7 Open outFile For Output As #1 ;\5^yDv[e Print #1, "type bsdf_data" 0aS&!"o! Print #1, "format angles=deg bsdf=value scale=1" `]xot8 8+7=yN( 'Loop the file list, skip the two header lines and write the remaining data to file &J~%Nt Dim lineArray() As String, curLine As Long :jp4 !0w For Each curFile In fList M!ra3Y Print "Merging data from file " & curFile iqj
ZC80 ReadFile( cDir & curFile, lineArray ) _4VS.~}/R For curLine = 2 To UBound(lineArray) @94_'i7\ Print #1, lineArray(curLine) 0Tm"Zh?B| Next u*NU MT2 Next 5Se
S^kJC !Y3
*\ 'Close the output file oqOXRUy Close #1 8I'Am"bc\ zkt+"P{az[ Print "Finished merging RPC data for sample " & sampName dU~DlaEy( Print "FRED formatted data file: " & Chr(9) & outFile mf>cv2+ End Sub MFyMo jBvZ>H+w~ 'Utility function to read the contents of a file into an array of strings. _\P9~w
` Function ReadFile(ByVal fileName As String, _ p2UZqq2 ByRef lineArray() As String) As Long |H)WJ/` !PfI e94{` ReadFile = -1 !%x=o& Dim oFSO As Object cO#e
AQf7 Set oFSO = CreateObject("Scripting.FileSystemObject") ]eJjffx Erase lineArray Z-!W#
nFn@Z'T$N Dim fid As Long 3ee?B~Tun If oFSO.fileexists( fileName ) Then I oz
rZ fid = FreeFile() o9:GKc Open fileName For Input As fid xCd9b:jG lineArray = Split(Input(LOF(fid), fid), vbCrLf) +C{ %pF Close fid l|[8'*]r! End If #egP*{F Set oFSO = Nothing c !ybz{L Return UBound( lineArray ) 7x%0^~/n ]byj[Gd End Function "KY9MBzPD 7b_Ihv
Sub GetFileList( ByVal in_dir As String, _ >o\[?QvP ByRef in_flist() As String ) .g7ebh6D uxq!kF'Ls 'Redimension the file list array =%:mZ@x' Erase in_flist .>-`2B*/ h<wF;g, 'Tracks how many files are found ms8PFu(f Dim fCount As Long NC 0H5 fCount = 0 9's/~T 4=H/-v'& 'Recurse directory and search for text files b|c?xHF}K Dim f As String 89B1\ff f = Dir$(in_dir & "*.txt") &/7AW(? While f <> "" N~-N Q ReDim Preserve in_flist(fCount) fN8|4 in_flist(fCount) = f Cm;WQuv@ fCount += 1 rs@,<DV)u f = Dir$() a4
g~'^uC Wend n8zh;vuJ ReDim Preserve in_flist(fCount-1) &Jj^)GBU ybtje=3E End Sub %}G:R!4 d
|