-
UID:317649
-
- 注册时间2020-06-19
- 最后登录2024-05-30
- 在线时间1273小时
-
-
访问TA的空间加好友用道具
|
摘要: Vw~st1",[ ztRe\(9bL 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。 y {PUklq c@xQ2&i 背景: )>X
C_ R 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。 l2lyi
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。 #@cOyxUt 图1. RPC Photonics工程漫射体结构及光束投射形状 <8[y2|UBt PAUepO_ -{tB&V~+v 步骤 ~s[St0 }bZcVc2 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。 P
nxx W? -? |-ux 图2. RPC Photonics工程漫射体不同类型的散射数据
?8O %k<? 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) w
'<8lw 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 F}C.F 例如下所示: 2VgDM6h Sample name: EDF-C1-56 X4bB Merging data from file EDF-C1-56 0-0.txt
8FmRD Finished merging RPC data for sample EDF-C1-56 .e,(}_[[< FRED formatted data file: D:\FRED\散射片数据\EDF-C1-56_FRED.txt S.#IC
lV 4、 生成了FRED可识别的文件后,将散射模型导入到FRED里面 `]q>A']Dl a. 创建一个新的散射库 NPFrn[M$ b. 散射模型命名 f L}3I(VK c. 改变散射模型为“Tabulated BSDF”. d;-/F b{4 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 ) j18qY4Gw) 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。 pFZ2(b& 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, a1 I"Sh g. 点击OK >Wbt_%dKy 5、 数据输入后,可点击“Plot”按钮验证BSDF模型及总的散射值 #go!"HL E<|p9,M '0juZ~>} 脚本代码: V:wx@9m) -q}c;0vL-a '#Language "WWB-COM" vp>,}nx4 %v_w"2x; Option Explicit =(-oQ<@v {r$n
$ Sub Main 4%]wd}'#Un -ST[!W V 'Cleanup oOU?6nq ClearOutputWindow() 0)?.rthk4S _^;;vR% Print "Merging RPC Photonics BSDF Data Files" 8)1k>= SetTextColor(255,0,0) k$u/6lw]IB Print "Note: Script should be located in the same folder as the BSDF TXT files." ;Rz+4< Print "Note: Do not run this script multiple times without deleting the output file between executions." S5W*,? SetTextColor(0,0,0) [ ;$(; BM@:=>ypQ 'Current directory of this script (should be the same as the text files being merged) u$"dL=s! Dim cDir As String has \W\( cDir = MacroDir$ & "\" CXZO 5c W2 'Array which will be populated with the list of files to be merged T/A[C Dim fList() As String, curFile As String TCC([ GetFileList( cDir, fList ) qNH=
W?T8. .BWCGb2bH Print "" CfSpwkg Print "Files found for merging:" %s^2m"ca}= For Each curFile In fList .sO.Y<-fl Print Chr(9) & curFile h]DS$WZ Next _aR_[ ex-0@ 'Split the first text file name found to get the sample name. First file should be 0-0 measurement. ncGg@$E Dim nameArray() As String, sampName As String ?_!} lg nameArray = Split(fList(0)," 0-0.txt") "wB~*,Ny sampName = nameArray(0) \KGi54&Y Print "" g^V4+3v|a' Print "Sample name: " & Chr(9) & sampName Ed(6%kd Gs2|#*6 'Open an output file and write the FRED header data h7}D//~p Dim outFile As String &at^~o outFile = cDir & sampName & "_FRED.txt" =lE_
Q[P Open outFile For Output As #1 ZW6ZO[`6 Print #1, "type bsdf_data" &Ow[ Print #1, "format angles=deg bsdf=value scale=1" VdVUYp W!R}eLf@ 'Loop the file list, skip the two header lines and write the remaining data to file J`&*r;""V Dim lineArray() As String, curLine As Long e~NEyS~3 For Each curFile In fList O,&nCxB] Print "Merging data from file " & curFile |Sne\N>% ReadFile( cDir & curFile, lineArray ) &L88e\
c+ For curLine = 2 To UBound(lineArray) :r{;'[38 Print #1, lineArray(curLine) aCq ) hR Next wRa$b Next yc#0c[ZQu ?!h
jI;_& 'Close the output file gJkk0wokC Close #1 lk$@8h$vS 0 e}N{,&Y Print "Finished merging RPC data for sample " & sampName Fp_?1y Print "FRED formatted data file: " & Chr(9) & outFile 3X0"</G6 End Sub <6
LpsM} MDHTZ94\Q 'Utility function to read the contents of a file into an array of strings. $IM}d"/9 Function ReadFile(ByVal fileName As String, _ qmWK8}F.cE ByRef lineArray() As String) As Long 69z,_p$@: 7Vn;LW ReadFile = -1 YA";&|V Dim oFSO As Object q_h=O1W Set oFSO = CreateObject("Scripting.FileSystemObject") M<4tjVQ6 Erase lineArray p~n62( Kzj9!'0R Dim fid As Long z1-JoZ If oFSO.fileexists( fileName ) Then i'[o,dbE fid = FreeFile() gPo3jw o$ Open fileName For Input As fid j9V*f
HK lineArray = Split(Input(LOF(fid), fid), vbCrLf) R-L*N$@! Close fid J%Cn End If `t@Rh~B Set oFSO = Nothing bJ~@
k,' Return UBound( lineArray ) 7$z]oVbO' 9S.J%*F7 End Function 8?YWE62 0u3"$o'R Sub GetFileList( ByVal in_dir As String, _ O&]P
u5 ByRef in_flist() As String ) }i)^?@ qu}&4_`%:V 'Redimension the file list array U_X / Erase in_flist l8$7N=Y G2 'Tracks how many files are found (jV_L1D Dim fCount As Long "_g3{[es! fCount = 0 Za*QX| )kBN]>&R 'Recurse directory and search for text files l"C)Ia&/ Dim f As String ;Q1/53Y< f = Dir$(in_dir & "*.txt") <b5J"i&m While f <> "" /^m3?q[a ReDim Preserve in_flist(fCount) YH:murJMZ in_flist(fCount) = f yY3Mv/R fCount += 1 i*T>,z f = Dir$() )[w_LHKI Wend xE[CNJ%t^, ReDim Preserve in_flist(fCount-1) +2ZBj6 e9 I^CKq?V?: End Sub R*DQm B9Ha6kj ^Hdru]A$2 QQ:2987619807 +Kw&XRAd
|