SYNOPSYS 光学设计软件课程十一：球形激光光束整形器

Opc, {,z6  
激光器的输出具有非均匀的高斯强度分布，并且对于某些应用，人们希望使其均匀分布。 这是激光束整形器的工作需求。 .(T*mk*>  
处理办法： :77dl/d%  
这项工作可以通过多种方式完成。 对于具有球面的简单透镜，它需要以重新分布光的方式平衡大量的球差，降低光束中心处的能量密度，同时在边缘附近增加光束。 使用非球面表面更容易，其中人们可以更好地控制要引入的像差量，如果使用衍射光学元件，则更容易控制。 问题是后者比球面镜片贵得多，所以我们要明白我们想要一个什么样的结果。 *3;H6   
考虑到这一点，我们将尝试一种全部使用球面透镜的方法，以确定我们可以制作光束的均匀程度以及我们需要多少元件。 让我们从一个非常简单的结构开始。 >OP[qj  
将腰半径为0.35mm的HeNe激光器转换成直径为10mm且均匀至10％以内的光束。 B%Pg:|  
这是我们输入的初始结构：

5U[m]W=B  
    RLE                         ! Beginning of lens input file. ID LASER BEAM SHAPER 6\jhDP@`9  
    WA1 .6328                 ! Single wavelength '6Lw<#It  
    UNI MM                     ! Lens is in millimeters JDi\?m d.  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. *&7F(  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. luNEgCq  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 =ELl86=CG  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 3aL8GMiu  
                             ! find spacing so ray height is 5 mm on next surface /G}TPXA  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 AUZ^XiK  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. "UUzLa
_  
    7                         ! Surfaces 6 and 7 exist tGq0f"}'J  
    AFOCAL                     ! because they are required for AFOCAL output. Ct-^-XD  
    END                         ! End of lens input file.

QfHJZ7K.4  
    FLUX 100 P 3

~yrEB:w`_  
    DD: DO MACRO FOR AIP = -1 TO 1 9Tju+KcK  
    COMPOSITE                    ! Ready a composite definition. iLd_{  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP jv<C#0E^  
                                ! (defined later) on surface 3. sr|afqjXD  
    = CD1 #`kLU:  
    Z1 = FILE 1 S.iCkX  
    = 1 + Z1 .(2Zoa  
    ORD = FILE 1

\R}`S`fIw`  
    CHG NOP y
?r:`n  
    9 UMC END udld[f.  
r=S6yq}  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. AJ%
x"  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END Ho_ 2zx:8b  
BS(XEmJn&j  
    AANT                        ! Start of merit function definition AEC 3Mlwq'pzD  
    ACC ){_D  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. 2u=Nb0  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 rB<za I\V  
    M 5 10 A P YA 0 0 1 0 10 kN'.e*  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 Uiz#QGt  
    M    0    1    A    P    FLUX    0    0    .98        0    10 Z2.S:y.  
    M    0    1    A    P    FLUX    0    0    .97        0    10 `H#G/zOr  
    M    0    1    A    P    FLUX    0    0    .96        0    10 |IgH0 zZ  
    M    0    1    A    P    FLUX    0    0    .95        0    10 yn;sd+:z  
    M    0    1    A    P    FLUX    0    0    .94        0    10 G\I DgPj`  
    M    0    1    A    P    FLUX    0    0    .93        0    10 jcY:a0[{D  
    M    0    1    A    P    FLUX    0    0    .92        0    10 L{i,.aE/nO  
    M    0    1    A    P    FLUX    0    0    .91        0    10 lY,dy
NFHV  
    M    0    1    A    P    FLUX    0    0    .85        0    10 MU-T>S4  
    M    0    1    A    P    FLUX    0    0    .8    0        10 .dr-I7&!  
    M    0    1    A    P    FLUX    0    0    .7    0        10 r\x"nS  
    M    0    1    A    P    FLUX    0    0    .5    0        10 REaU=-m-  
    M    0    1    A    P    FLUX    0    0    .3    0        10 HpQuro'Qh  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays.
XoO#{7a  
    END                            ! End of merit function definition. bt2`elH|  
    SNAP "F.0(<4)  
    SYNO 100

/@!%/Kl  
    CHG NOP a'U}.w}  
    13 UMC END -#e3aXe  
2L!wbeTb;  
    PANT                        ! Start of variable parameter definitions. B_u1FWc  
    VLIST RAD ALL                ! Vary all radii. 2yt)"DnFk  
    VLIST TH ALL tt=JvI9>  
    END j\o<r0I  
8^8fUN4<=  
    AANT                        ! Start of merit function definition AEC ST*\Q  
    ACC @Z fQ)q\  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large zlw+=NX  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 +Ui @3Q  
    M 5 10 A P YA 0 0 1 0 LB2 VXM5 B  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones oXQzCjX_  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 ?c$z?QTMJ  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 "Q>gQKgL  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 )U?O4| \P  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 KTQy pv  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 WFYbmfmV  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 [i&EUvo  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 d;<gwCc  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 19r4J(pV  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 I 19 
/  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 Rfk8trD B  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 Zs$Qo->F  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 9}=]oX!+V  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 s5 P~feg  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P #DqVh!t"  
nz?jNdyz  
    END                            ! End of merit function definition. MHm=X8eg  
    SNAP r&MHww1i  
-$; h+9BO  
    SYNO 40

L,m'/}$  
    CHG &sbKN[xM  
    CFIX <3 b|Sk:T  
    1 TH 0 e]1&f.K  
    END ]d}h`!:  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE

火车污污:很有收获，谢谢楼主 (2019-02-26 15:21)  ,drcJ