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。 ?IpLf\n-  
处理办法： 7 [0L9\xm  
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。 ;J7F J3n  
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。 0Fu~
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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。 tJN<PCG6"  
这是我们输入的初始结构：

.9.2Be  
    RLE                         ! Beginning of lens input file. ID LASER BEAM SHAPER yr,=.?C-  
    WA1 .6328                 ! Single wavelength av~5l4YL  
    UNI MM                     ! Lens is in millimeters 5eWwgA  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. D_Bb?o5  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. 5 (A5Y-B  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 JfPD}w  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3
0]4(:(B  
                             ! find spacing so ray height is 5 mm on next surface zl`h~}I  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 V*~Zs'L'E  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. }u1O#L}F5  
    7                         ! Surfaces 6 and 7 exist )vxUT{;sH  
    AFOCAL                     ! because they are required for AFOCAL output. 3h<,  
    END                         ! End of lens input file.

Sf8{h|71  
    FLUX 100 P 3

M+x,opl  
    DD: DO MACRO FOR AIP = -1 TO 1 +zs4a96[  
    COMPOSITE                    ! Ready a composite definition. HJY2#lSha6  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP r hfb ftw  
                                ! (defined later) on surface 3. $.bBFWk  
    = CD1 ZWS`\M  
    Z1 = FILE 1 {%C7EAq*  
    = 1 + Z1 #BSTlz  
    ORD = FILE 1

7>~5jYP  
    CHG NOP &e8s65`  
    9 UMC END ]EpWSs!"g  
nb>7UN.9  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. ZGd!IghL  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END &:7ZQ1  
r4#o+qE  
    AANT                        ! Start of merit function definition AEC q?ix$nKOv  
    ACC vz!s~cAt  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. Kx%Sku<F'  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 G2FXrkU  
    M 5 10 A P YA 0 0 1 0 10 ]H1I,`=@  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 ;"m ,:5%  
    M    0    1    A    P    FLUX    0    0    .98        0    10 &sd}ulEg`  
    M    0    1    A    P    FLUX    0    0    .97        0    10 @i*|s~15  
    M    0    1    A    P    FLUX    0    0    .96        0    10 Y(d$  
    M    0    1    A    P    FLUX    0    0    .95        0    10 pt}X>ph{  
    M    0    1    A    P    FLUX    0    0    .94        0    10 piZJJYv t  
    M    0    1    A    P    FLUX    0    0    .93        0    10 J:\|Nc?  
    M    0    1    A    P    FLUX    0    0    .92        0    10 +) m_o"hl  
    M    0    1    A    P    FLUX    0    0    .91        0    10 (!zy{;g|  
    M    0    1    A    P    FLUX    0    0    .85        0    10 |*0<M(YXN  
    M    0    1    A    P    FLUX    0    0    .8    0        10 {qa Aq%'  
    M    0    1    A    P    FLUX    0    0    .7    0        10 N~xLu8,  
    M    0    1    A    P    FLUX    0    0    .5    0        10 qZA).12qS  
    M    0    1    A    P    FLUX    0    0    .3    0        10 '3 ^+{=q  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. ~Onoe $A[<  
    END                            ! End of merit function definition. #&7}-"Nd  
    SNAP r#Oo nZ  
    SYNO 100

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    CHG NOP +@/"%9w
 
    13 UMC END jav#f{'  
mFZ?hOyP.  
    PANT                        ! Start of variable parameter definitions. k'5?M  
    VLIST RAD ALL                ! Vary all radii. 6 M*O{f
 
    VLIST TH ALL n;T7=1_"  
    END 6ZQwBS0
Y  
 MEGv}  
    AANT                        ! Start of merit function definition AEC aWY g
R  
    ACC =HlQ36;*  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large *NClfkZ  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 }-sdov<<  
    M 5 10 A P YA 0 0 1 0 LB2 K]0JC/R6(@  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones W0]gLw9*  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 V:c;-)(  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 )}?#  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 SK#(#OQoh  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 Q{lpKe0  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 HI11Jl}{  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 |]X  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 >b{q.  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 &Ob!4+v/GP  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 8{X"h#  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 ikSt"}/hd  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 d>t<_}  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 Rw:*'1  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 _<OSqE  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P p$3sME$L  
6'Worj  
    END                            ! End of merit function definition. +P`*kj-P\  
    SNAP `.Qi?* ^  
Evjj"h&0J  
    SYNO 40

j?x>_#tIY  
    CHG @dPTk"P  
    CFIX sv&;Y\2c  
    1 TH 0 -RvQB  
    END >^*+iEe  
    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)  10q'Z}34