-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-09-29
- 在线时间1866小时
-
-
访问TA的空间加好友用道具
|
摘要: }B1!gz$YNO 8Q'0h
m? 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。 ruy}/7uf L'kmNVvYN 背景: n<u
$=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。 .Fp4:
e 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。 &mx)~J^m 图1. RPC Photonics工程漫射体结构及光束投射形状 <q@a~'Ai?! PAM}*' \:UIc*S 步骤 c.e2 M/ $A-J,_:T< 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。 %B.yW`,X J
G{3EWXR 图2. RPC Photonics工程漫射体不同类型的散射数据 )'+8}T]xQ 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) $F5 b 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 #%h-[/ 例如下所示: K>@+m Sample name: EDF-C1-56 Bn &Ws Merging data from file EDF-C1-56 0-0.txt >: g3k Finished merging RPC data for sample EDF-C1-56 s|y "WDyx5 FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt |0f>aZ 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 7](KV" %V a. 创建一个新的散射库 Ev}C<zk* b. 散射模型命名 "LlfOKG c. 改变散射模型为“Tabulated BSDF”. L bmawi^ d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) ^0\ e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 j=r P:# f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, /x
p| g. 点击OK XLrwxj0 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 /$p6'1P8 [UWdW #6HA\dE 脚本代码: ,tu.2VQc@ NdD`Hn- '#Language "WWB-COM" y1+*6| >E{";C) Option Explicit ?b>,9A.Z yj.7'{mA Sub Main hJpxf,?'K Eu@huN*/ 'Cleanup ud'-;W ClearOutputWindow() #W.#Hjpp e9U9Uu[ Print "Merging RPC Photonics BSDF Data Files" [R^iF SetTextColor(255,0,0) naR0@Q"\h Print "Note: Script should be located in the same folder as the BSDF TXT files." 4i(JZN? Print "Note: Do not run this script multiple times without deleting the output file between executions." SPY|K SetTextColor(0,0,0) U`NjPZe5^ VoWNW 'Current directory of this script (should be the same as the text files being merged) 9\mLW" Dim cDir As String -7@/[9Gf`: cDir = MacroDir$ & "\" :fZ}o|t7 ijK"^4i 'Array which will be populated with the list of files to be merged >\P@^ h] Dim fList() As String, curFile As String oldA#sA$ GetFileList( cDir, fList ) D"2&P^- zkuU5O Print "" 87
$dBb{ Print "Files found for merging:" DN-+osPi For Each curFile In fList qh|_W(`y Print Chr(9) & curFile %4,O 2\0?& Next Q/(K$6]j {byBcG 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. zck#tht4
n Dim nameArray() As String, sampName As String g4=pnK8 nameArray = Split(fList(0)," 0-0.txt") aJbO((%$|u sampName = nameArray(0) R6kD=JY/! Print "" SwTL|+u Print "Sample name: " & Chr(9) & sampName QSdHm 7e|s
wJ>4 'Open an output file and write the FRED header data Mb|a+,:>3 Dim outFile As String $j5K8Ad outFile = cDir & sampName & "_FRED.txt" .ps-4eXF Open outFile For Output As #1 p'*>vk Print #1, "type bsdf_data" >,$_| C Print #1, "format angles=deg bsdf=value scale=1" NV72 "$+Jnc!! 'Loop the file list, skip the two header lines and write the remaining data to file ~=6xyc/c Dim lineArray() As String, curLine As Long "4+&-ms For Each curFile In fList 'MUv5Th Print "Merging data from file " & curFile hIs4@0 ReadFile( cDir & curFile, lineArray ) 5
ZGNz1)?V For curLine = 2 To UBound(lineArray) (:TjoXXiY Print #1, lineArray(curLine) ODNM+#}` Next =[cS0Sy Next n22zq6m bMg(B-uF7 'Close the output file v&Yi Close #1 .w=/+TA aQ?/%\> Print "Finished merging RPC data for sample " & sampName iNtaDX|%/ Print "FRED formatted data file: " & Chr(9) & outFile "d#Y}@*~o End Sub A}G7l?V& xW)2<m6C& 'Utility function to read the contents of a file into an array of strings. DCIxRPw Function ReadFile(ByVal fileName As String, _ %Gz0^[+ ByRef lineArray() As String) As Long nm5cpnNl 42{Ew8 ReadFile = -1 J%v=yBC2 Dim oFSO As Object p{amC ;cI$ Set oFSO = CreateObject("Scripting.FileSystemObject") : UGZ+ Erase lineArray M -cTRd-i f9t6q*a`% Dim fid As Long D/Z6C&/I If oFSO.fileexists( fileName ) Then h)ECf?r< fid = FreeFile() fi-WZ Open fileName For Input As fid @r/#-?W lineArray = Split(Input(LOF(fid), fid), vbCrLf) p4.wh|n Close fid ]qethaNy End If Vwg|K| Set oFSO = Nothing "bFTk/ Return UBound( lineArray ) T! Y@`Ox 5{|7$VqPF End Function >Ea8G, V+*
P2| Sub GetFileList( ByVal in_dir As String, _ `18qbot ByRef in_flist() As String ) 0bceI >BIMi^ 'Redimension the file list array $UMFNjL
Erase in_flist |% F=po>w 2Nu=/tMN 'Tracks how many files are found ~("5yG Dim fCount As Long ;(f)&Yom fCount = 0 @TLS<~ wa<MRt W= 'Recurse directory and search for text files BWeA@v Dim f As String _X^1IaL f = Dir$(in_dir & "*.txt") 6Z>FTz_ While f <> "" @K\~O__ ReDim Preserve in_flist(fCount) ^W`<gR in_flist(fCount) = f O,+1<.;+ fCount += 1 =e/9&993 f = Dir$() ^1S!F-H4\ Wend 04LI]' ReDim Preserve in_flist(fCount-1) s1MErd h;C5hU4P End Sub _(_a*ml WKts[Z ?Nup1!D QQ:2987619807 aXQnZ+2e^R
|