SYNOPSYS 光学设计软件课程十一：球形激光光束整形器

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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。 @:!%Z`  
处理办法： G`;mSq6i  
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。 ZC^?ng  
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。 %V
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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。 2Y=Q%  
这是我们输入的初始结构：

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    RLE                         ! Beginning of lens input file. ID LASER BEAM SHAPER 6e}T zc\@(  
    WA1 .6328                 ! Single wavelength (ueH@A"9;  
    UNI MM                     ! Lens is in millimeters gKIN* Od  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. G~Y#l@8M+  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. R9+f^o`W  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 >S?7-2X  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 K:pG<oV|}  
                             ! find spacing so ray height is 5 mm on next surface 6skd>v UU  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 !yV)EJ:$  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. g)MLgjj  
    7                         ! Surfaces 6 and 7 exist p4b6TI9;  
    AFOCAL                     ! because they are required for AFOCAL output. %U1HvmyK  
    END                         ! End of lens input file.

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    FLUX 100 P 3

gJzS,g1]  
    DD: DO MACRO FOR AIP = -1 TO 1 >rh<%55P`  
    COMPOSITE                    ! Ready a composite definition. CR|>?9V  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP fAvB!e  
                                ! (defined later) on surface 3. 8}^ym^H|j  
    = CD1 3v<9 Z9O  
    Z1 = FILE 1 qZSW5lC0  
    = 1 + Z1 :!,.c$M  
    ORD = FILE 1

zPb"6%1B  
    CHG NOP I~c}&'V  
    9 UMC END #Cz:l|\ i  
2{#=Ygb0  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. hM`*-+Zb  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END t]pJt  
.ZH5^Sv$vp  
    AANT                        ! Start of merit function definition AEC mHC36ba  
    ACC Qp>Q-+e0  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. 
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    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 rB5+~ K@  
    M 5 10 A P YA 0 0 1 0 10 ~3m} EL  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 !^A t{[U  
    M    0    1    A    P    FLUX    0    0    .98        0    10 rYr.mX  
    M    0    1    A    P    FLUX    0    0    .97        0    10 v_
@&#!u`  
    M    0    1    A    P    FLUX    0    0    .96        0    10 .w]S!=h  
    M    0    1    A    P    FLUX    0    0    .95        0    10 90)rOD1B  
    M    0    1    A    P    FLUX    0    0    .94        0    10 S8Yh>j8-  
    M    0    1    A    P    FLUX    0    0    .93        0    10 =t-503e.J  
    M    0    1    A    P    FLUX    0    0    .92        0    10 &rxR"^x\  
    M    0    1    A    P    FLUX    0    0    .91        0    10 BLhuYuON  
    M    0    1    A    P    FLUX    0    0    .85        0    10 ZpY"P6
 
    M    0    1    A    P    FLUX    0    0    .8    0        10 (tP^F)}e5  
    M    0    1    A    P    FLUX    0    0    .7    0        10 -^7n+ QX  
    M    0    1    A    P    FLUX    0    0    .5    0        10 Q /\Hc  
    M    0    1    A    P    FLUX    0    0    .3    0        10 LHP?!rO0  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. cb~m==G  
    END                            ! End of merit function definition. /-ky'S9  
    SNAP hC=="4 -  
    SYNO 100

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    CHG NOP _sCpy
u  
    13 UMC END `p%&c%*A  
1jozM"H7Q  
    PANT                        ! Start of variable parameter definitions. qcfLA~y  
    VLIST RAD ALL                ! Vary all radii. vQ}llA h  
    VLIST TH ALL X;0DQnAI8j  
    END !(Y23w*  
,9p 4(jjX  
    AANT                        ! Start of merit function definition AEC )y:~T\g  
    ACC Ol24A^  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large mko<J0|4  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 O(PG"c  
    M 5 10 A P YA 0 0 1 0 LB2 UpS`KgF"v  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones MLcc  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 5!G}*u.  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 x*[\$E`v  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 g+k0Fw]!  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 "tbKKh66  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 e? fFh,a  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 jC<!Ny-$  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 GKwm %A  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 dg4
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    M    0    1    A    P    FLUX    0    0    .85    0    LB1 rr#&0`]  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 ;p#)z/zZ  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 T?c:z?j_9  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 n
rMm](Y45  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 A@EeX4N  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P lM5Xw  
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    END                            ! End of merit function definition. Q': }'CI  
    SNAP AjK'P<:/  
 `'5(4j  
    SYNO 40

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    CHG v3Y/D1jd"  
    CFIX d:6?miMH]t  
    1 TH 0 Dg4?,{c9W  
    END mh!;W=|/"  
    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)  mF[w-<:.d