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。 5f}wQ  
处理办法： XCQ=`3f  
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。 NcFHvK  
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。 eX$u  
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。 \$GlB+ iCx  
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 M%yT?R+  
    WA1 .6328                 ! Single wavelength -*+7-9A I  
    UNI MM                     ! Lens is in millimeters sIg{a(1/  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. |Y2u=B  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. &5c)qap;n  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 mI?AI7DqK  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 g$9Yfu  
                             ! find spacing so ray height is 5 mm on next surface So,EPB+  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 ~#7=gI&p@  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. 'tp+g3V  
    7                         ! Surfaces 6 and 7 exist rS8/_'  
    AFOCAL                     ! because they are required for AFOCAL output. F0]NtKaH  
    END                         ! End of lens input file.

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    FLUX 100 P 3

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    DD: DO MACRO FOR AIP = -1 TO 1 7WKb| /#;  
    COMPOSITE                    ! Ready a composite definition. 0x[v)k9"0  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP $hn#T#J3  
                                ! (defined later) on surface 3. i|y8n7c  
    = CD1 VuPa'2  
    Z1 = FILE 1 YN.rj-;^+  
    = 1 + Z1 F@)wi0  
    ORD = FILE 1

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    CHG NOP &k+jVymH  
    9 UMC END DwMq  
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    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. 4l<%Q2  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END ,Tvfn`;(  
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    AANT                        ! Start of merit function definition AEC LK-2e$1  
    ACC DZ<q)EpC  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. &"p7X>bd  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 x_GD  
    M 5 10 A P YA 0 0 1 0 10 xKi: 2  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 b MZ-{<+i  
    M    0    1    A    P    FLUX    0    0    .98        0    10 PJ5~,4H-4  
    M    0    1    A    P    FLUX    0    0    .97        0    10 +fBbW::R^  
    M    0    1    A    P    FLUX    0    0    .96        0    10 ,9SBGxK5`  
    M    0    1    A    P    FLUX    0    0    .95        0    10 x\z*iv  
    M    0    1    A    P    FLUX    0    0    .94        0    10 2? 9*V19yu  
    M    0    1    A    P    FLUX    0    0    .93        0    10 s{#rCc)  
    M    0    1    A    P    FLUX    0    0    .92        0    10 1MkQ$v7m  
    M    0    1    A    P    FLUX    0    0    .91        0    10 }1kT0*'L  
    M    0    1    A    P    FLUX    0    0    .85        0    10 b=amd*  
    M    0    1    A    P    FLUX    0    0    .8    0        10 Ha>Hb`  
    M    0    1    A    P    FLUX    0    0    .7    0        10
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    M    0    1    A    P    FLUX    0    0    .5    0        10 H
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    M    0    1    A    P    FLUX    0    0    .3    0        10 efW<  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. o/I'Qi$v-  
    END                            ! End of merit function definition. >NwS0j$j@  
    SNAP l.[S.@\=.  
    SYNO 100

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    CHG NOP G(joamfM  
    13 UMC END >d2U=Yk!  
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    PANT                        ! Start of variable parameter definitions. <vS3[(  
    VLIST RAD ALL                ! Vary all radii. .xG3`YH  
    VLIST TH ALL Lmh4ezrdH  
    END ($s%5|  
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    AANT                        ! Start of merit function definition AEC d7(g=JK<  
    ACC Ix~_.&  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large QAN :  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 eI99itDQ  
    M 5 10 A P YA 0 0 1 0 LB2 f0Wbc\L[  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones N(ov.l;  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 FL
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    M    0    1    A    P    FLUX    0    0    .97    0    LB1 !g|)?XWc  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 b~oQhU??"  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 Z@sDxYt9  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 KNvvYwFH]  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 k9Pwf"m|](  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 naOCa  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 }(MI
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    M    0    1    A    P    FLUX    0    0    .85    0    LB1 nev@ykP6  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 I!-"SuBy4J  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 GQ-fEIi{  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 2&b?NqEeZ  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 };/;L[,G  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P )SjhOvm  
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    END                            ! End of merit function definition. `|rF^~6(dR  
    SNAP VAD9mS^~  
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    SYNO 40

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    CHG m.6O%jD  
    CFIX ?:woUTyCv  
    1 TH 0 KA#P_e{<@  
    END I,8f{T!O@"  
    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)  4K(oOxc9.