-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2025-09-16
- 在线时间1853小时
-
-
访问TA的空间加好友用道具
|
摘要: x c/}#>ED 7s/u(~d) 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。 vbb5f #WZ bmfI~8 背景: hEBY8=gK 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。 {@+Ty]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。 w2
a1mU/ 图1. RPC Photonics工程漫射体结构及光束投射形状 i+p^ ^t\ i.3=!6z vR s,zL$W 步骤 d/BM&r BQ=PW|[ 1、 在http://www.rpcphotonics.com/bsdf-data-optical-diffusers/下载并解压BSDF数据到某一文件夹下,选择“Raw data”文件。 wgamshm"d JT3-AAi[Z 图2. RPC Photonics工程漫射体不同类型的散射数据 VFRi1\G 2、 将 http://fred-kb.photonengr.com/wp-content/uploads/sites/2/2015/06/constructRpcScatterFile.frs脚本文件放在步骤1中的文件下。(脚本代码放在了本文的最后) M%ICdIc' 3、 打开FRED并运行脚本文件,会输出如下“<SAMPLE>_FRED.txt”格式,<SAMPLE>即为RPC Photonics散射片数据集 h| ,:e;>} 例如下所示: g/P+ZXJ Sample name: EDF-C1-56 y~q8pH1
Merging data from file EDF-C1-56 0-0.txt N"]q='t Finished merging RPC data for sample EDF-C1-56 '}fzX2Q# FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt 7]blrN] 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 D|e
uX7b a. 创建一个新的散射库 gDQ1?N'8{t b. 散射模型命名 ~:Ll&29i c. 改变散射模型为“Tabulated BSDF”. 555XCWyrC d. 在File框出右键选择“Replace With Data From a File”, 选择步骤三生成的数据文件(如EDF-C1-56_FRED.txt ) ]ooIrY8 e. 切换为“Varies w/angle” 选项(假定所有的RPC Photonics datasets 数据有多个测试角度。 qU#1i:(F* f. 在底部的对话框中,选择透射散射、反射停并且你需要终止入射光线, 1JztFix g. 点击OK [co% :xJu 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 U56G. - `p4-J!Fy L&u$t}~) 脚本代码: (NF~Ck$#q G/7cK\^u '#Language "WWB-COM" K
i'Fn" sj HrPs e Option Explicit "|q qUKJZ |4B:<x Sub Main B56L1^7 >pp5;h8! 'Cleanup *7ZN]/VRT ClearOutputWindow() X]wRwG DXJ`oh Print "Merging RPC Photonics BSDF Data Files" Y8-86 *zC SetTextColor(255,0,0) ;\14b?TUH Print "Note: Script should be located in the same folder as the BSDF TXT files." FVaQEMZ^ Print "Note: Do not run this script multiple times without deleting the output file between executions." J&.{7YF SetTextColor(0,0,0) EfCx`3~EX ;[=8B\? 'Current directory of this script (should be the same as the text files being merged) _j< K=){ Dim cDir As String 56zL"TF` cDir = MacroDir$ & "\" B9NWW6S ihIVUu-M 'Array which will be populated with the list of files to be merged MP_ ~<Q Dim fList() As String, curFile As String HY&aV2|A1 GetFileList( cDir, fList ) +n{#V;J i}.&0Fp Print "" y5*Z3"< Print "Files found for merging:" B0dQ@Hq* For Each curFile In fList }\\KYyjY Print Chr(9) & curFile 4QvsBpz@ Next glM$R &/ BG6B : 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. 95A1:A^t Dim nameArray() As String, sampName As String >z%&xgOa nameArray = Split(fList(0)," 0-0.txt") @mw5~ + sampName = nameArray(0) cx&>#8s& Print "" ]:4*L Print "Sample name: " & Chr(9) & sampName wt!nMQ /aZ+T5O 'Open an output file and write the FRED header data vms|x wb Dim outFile As String {2=jAz'? outFile = cDir & sampName & "_FRED.txt" G6/p1xy>o: Open outFile For Output As #1 JBE!j-F Print #1, "type bsdf_data" x:),P-~w Print #1, "format angles=deg bsdf=value scale=1" . 1KhBgy^K [d(U38BI 'Loop the file list, skip the two header lines and write the remaining data to file 5-aj2>=7 Dim lineArray() As String, curLine As Long lQ" p ! For Each curFile In fList _+K_5IO4 Print "Merging data from file " & curFile E"qRw_
~t ReadFile( cDir & curFile, lineArray ) eJxw)zd7 For curLine = 2 To UBound(lineArray) OBOtu u. Print #1, lineArray(curLine) 9N@W\DT Next g!lWu[d Next Cs9.&Y W+UfGk}A 'Close the output file iBF|&h(\ Close #1 D8Ykg >B;& #gz
M| Print "Finished merging RPC data for sample " & sampName bCo7*<I4 Print "FRED formatted data file: " & Chr(9) & outFile DI:]GED"= End Sub $c0h.t }uJu>'1[G 'Utility function to read the contents of a file into an array of strings. v|uAzM{73 Function ReadFile(ByVal fileName As String, _ a%kQl^I4 ByRef lineArray() As String) As Long Al}6q{E9+8 C-Q28lD}f ReadFile = -1 iII=;:p Dim oFSO As Object W-mQjJ`,B Set oFSO = CreateObject("Scripting.FileSystemObject") 9^oKtkoDZ Erase lineArray @ ;*Ksy@1O LAB=Vp1y3[ Dim fid As Long )bS yB29S If oFSO.fileexists( fileName ) Then {:6r;TB fid = FreeFile() i,>khc Open fileName For Input As fid AL9chYP}/ lineArray = Split(Input(LOF(fid), fid), vbCrLf) (;T^8mI2 Close fid 7 HIeJ End If hs^zTZ_ Set oFSO = Nothing >AVVEv18 Return UBound( lineArray ) &]`(v}`] 3EJj9}#x"' End Function 39:bzUIF O_`VV* Sub GetFileList( ByVal in_dir As String, _ ojcA<60
' ByRef in_flist() As String ) 7m4aoK 4!Fo$9 'Redimension the file list array GeyvId03H Erase in_flist ]{3)^axW; Of*Pw[vD 'Tracks how many files are found C 3^JAP Dim fCount As Long !%CWZZ 6u fCount = 0 VCV"S>aVf 6wBx;y
| 'Recurse directory and search for text files S0zD"T Dim f As String u(@$a4z f = Dir$(in_dir & "*.txt") .c8g:WB< While f <> "" Bmr>n6| ReDim Preserve in_flist(fCount) aOlT;h in_flist(fCount) = f *=8JIs A>! fCount += 1 u_@f$ f = Dir$() CDsSrKhx Wend ZInpMp ReDim Preserve in_flist(fCount-1) K'L^;z6 mk;&yh End Sub |,S+@"0#
|