解决方案
从平面平行的表面开始设计了一个七片透镜的镜头,这个镜头很接近我们的设计要求。 该课程旨在展示PSD III优化算法的速度。
在本课程中,我们将从相同的初始结构开始 - 但在这种情况下,我们希望四个视场都能实现高MTF,并将目录玻璃类型替换为前一课程的玻璃模型。 为了做到这一点,我们将使用自动实际玻璃插入程序ARGLASS
这是输入:
RLE ! The starting system. 启动系统 ID TEST PSD III OBB 0 20 12.7 WAVL CDF UNITS MM 1 TH 5 GLM 1.6 50 2 TH 5 3 TH 5 GLM 1.6 50 4 TH 5 5 TH 5 GLM 1.6 50 6 TH 5 7 TH 5 GLM 1.6 50 8 TH 5 9 TH 5 GLM 1.6 50 10 TH 5 11 TH 5 GLM 1.6 50 12 TH 5 13 TH 5 GLM 1.6 50 14 TH 50 15 APS 7 END PAD/U ! Show the initial system. 显示初始系统 PROJECT ! Start a timer, then define a symbol, AWT, for the aperture weight启动计时器,然后为孔径权重定义符号AWT AWT: 0.5 ! almost equal weight over aperture孔径权重几乎相等 QUIET ! not showing everything on the monitor speeds things up在显示屏上没有显示F数的一切东西 PANT ! Define variables. 定义变量 CUL 1.9 ! Set upper limit of 1.9 on index variables. 在折射率变量上设置上限1.9 FUL 1.9 VY 1 YP1 ! Vary the paraxial stop position. 改变了近轴光阑位置 VLIST RAD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VLIST TH ALL VLIST GLM ALL END AANT ! Start of merit function definition. 开始评价函数定义 AEC ACC M 33 2 A GIHT GSR AWT 5 5 M 0 ! Note how weights are assigned to the several field points. 注意如何将权重分配给多个视场点 GNR AWT 4 4 M .3 ! This creates a ray grid at the .3 field point这会在.3视场点处创建光线网格 GNR AWT 4 4 M .6 ! These for the 0.6 field point这些为0.6视场点 GNR AWT 5 4 M .75 ! These for the 0.75 field point这些为0.75视场点 GNR AWT 4 4 M .8 ! These for the 0.8 field point这些为0.8视场点 GNR AWT 4 4 M 1 ! Full field全视场 END SNAP 100 DAMP 1000 SYNOPSYS 5 SYNOPSYS 10 SYNOPSYS 15 SYNOPSYS 100 ANNEAL 50 10 LOUD ! Restore output to the monitor将输出恢复到探测器 MERIT? STORE 3 ! Store the results in the library. 将结果存储在库中 ARGLASS 3 QUIET ! Start of ARGLASS input. 开始ARGLASS输入 CAT S ! Specify the Schott glass catalog. 指定Schott玻璃目录 INCLUDE 1 TO 13 ! Do all surfaces.执行所有表面 PREF ! Only use preferred glass types仅使用首选玻璃类型 SAFE ! and environmentally safe glasses.环保玻璃 GO ! Execute ARGLASS. 执行ARGLASS PROJECT ! See how long the job took看看工作花了多长时间 MOF M 0 40 80 0 Q 30 20 10 ! Calculate the MTF over field. 计算视场上的MTF 作业运行约30秒,并产生此结果: RLE ID TEST PSD III 180 WAVL .6562700 .5875600 .4861300 APS 1 UNITS MM OBB 0.000000 20.00000 12.70000 -25.39490 0.00000 0.00000 12.70000 0 AIR 1 RAD 63.9324304819396 TH 6.13775631 1 N1 1.82743442 N2 1.83402633 N3 1.84979432 1 CTE 0.584000E-05 1 GTB S 'N-LASF40 ' 2 RAD 121.4260973202004 TH 1.00000000 AIR 3 RAD 38.9734739086511 TH 20.57680176 3 N1 1.72508287 N2 1.72915286 N3 1.73846093 3 CTE 0.581000E-05 3 GTB S 'N-LAK34 ' 4 RAD 87.2688769717594 TH 1.01574402 AIR 5 RAD 76.7614323395048 TH 3.26054685 5 N1 1.72090550 N2 1.72827542 N3 1.74642643 5 CTE 0.940000E-05 5 GTB S 'N-SF10 ' 6 RAD 19.7361513224512 TH 21.84758786 AIR 7 RAD -29.7587962681538 TH 1.00000000 7 N1 1.83649445 N2 1.84665729 N3 1.87209365 7 CTE 0.846000E-05 7 GTB S 'N-SF57 ' 8 RAD -38.0771643426431 TH 1.00000000 AIR 9 RAD 148.7057065172241 TH 6.45696908 9 N1 1.91038602 N2 1.92285755 N3 1.95457944 9 CTE 0.590000E-05 9 GTB S 'N-SF66 ' 10 RAD 84.7349933920333 TH 1.28380951 AIR 11 RAD 116.5460118813826 TH 25.45671730 11 N1 1.64820928 N2 1.65159874 N3 1.65934342 11 CTE 0.710000E-05 11 GTB S 'N-LAK7 ' 12 RAD -40.6054550188090 TH 18.94463076 AIR 13 RAD 70.2471757058936 TH 25.49467569 13 N1 1.84254602 N2 1.85024035 N3 1.86897227 13 CTE 0.737000E-05 13 GTB S 'N-LASF9 ' 14 RAD 73.0342740343945 TH 16.56312158 AIR 15 CV 0.0000000000000 TH 0.00000000 AIR END
ARGLASS功能允许您过滤一些选项,这过滤项会影响程序选择玻璃。 例如,您可能只需要便宜的玻璃或耐酸性良好的玻璃。 在本练习中,我们只想使用具有良好环境特性的类型。 这是选择的内容:
--- ARGLASS 3 QUIET ! START OF ARGLASS INPUT. Lens number 3 ID TEST PSD III GLASS N-LASF40 HAS BEEN ASSIGNED TO SURFACE 1; MERIT = 0.248127 GLASS N-LAK34 HAS BEEN ASSIGNED TO SURFACE 3; MERIT = 0.370709 GLASS N-SF10 HAS BEEN ASSIGNED TO SURFACE 5; MERIT = 0.772238 GLASS N-SF57 HAS BEEN ASSIGNED TO SURFACE 7; MERIT = 0.290459 GLASS N-SF66 HAS BEEN ASSIGNED TO SURFACE 9; MERIT = 10.2718 GLASS N-LAK7 HAS BEEN ASSIGNED TO SURFACE 11; MERIT = 0.214292 GLASS N-LASF9 HAS BEEN ASSIGNED TO SURFACE 13; MERIT = 0.203867
要检查这些玻璃的属性,我们输入命令
PGA ALL ! Print Glass Attributes, all glasses
并得到一个列表,其中一部分如下所示:
*********************************************************** GLASS ATTRIBUTE FOR SURFACE NO. 1 SCHOTT N-LASF40 GLASS IS A PREFERRED TYPE. GLASS IS ENVIRONMENTALLY SAFE (NO Pb OR As). PRICE BUBBLE HUMIDITY STAIN ACID RESIST ALKALI RESIST SP GRAVITY 6.0 1 1 2 5 1 4.55 THIS GLASS HAS A LIST OF TRANSMISSION VALUES ATTACHED VALID RANGE OF TRANSMISSION DATA: LOW HIGH 0.365 2.500 GLASS HAS SELLMEIER INDEX COEFFICIENTS: 0.1985503E+01 0.2740570E+00 0.1289457E+01 0.1095833E-01 0.4745516E-01 0.9690853E+02 GLASS HAS 6 DNDT VALUES FROM GLASS TABLE: 8.1000E-06 1.2500E-08 -1.7300E-11 8.2700E-07 1.0800E-09 2.3800E-01 THERMAL COEFFICIENT (ALPHA) = 0.584E-05 ***********************************************************
如果这看起来像你所追求的那样,将ADT监视器添加到AANT文件中并进一步优化以修复薄透镜。分析镜头以找出问题,然后告诉AANT。
我们建议您自己运行此练习。尝试更改一些视场权重或孔径权重,然后再次运行。结果对这些变化非常敏感,当你设计自己的镜片时,你需要了解哪些控制有效,哪些控制无效。
这个例子从平面平行板开始,产生了一个相当不错的镜头。如果你运行它会发生什么。
(该程序以非零光焦度开始,根据其规则分配,并发现更多设计。)我们尝试了解这个问题,并得到了更好的解决方案。调整输入变量以查看发生的情况。
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