<p> Following above, I ran the same POP.zmx file on one computer that has Zemax version 2023.R2.02. Resampling on that same surface does not change the coupling result. My question is: What is the difference between the sampling of 2023.R2 and 2024.R2?<\/p><\/p>\n
- \n
- Here are some specific examples to illustrate how the sampling choice affecting the total power calculation:<\/li>\n<\/ul>\n
<p> As we change the sampling on dummy surface #1, which is just a standard surface sitting in front of all lenses. Beam propagates from source to this surface without anything in between. Here are some results using Zemax 2024.R2.02:<\/p><\/p>\n
- \n
- When resampling is completely off: Total power is 1, which is desired.<\/li>\n<\/ul>\n
<figure>
![\"\"](\"https:\/\/uploads-us-west-2.insided.com\/zemax-en\/attachment\/09bf9abb-0d21-4017-8c11-5e7005e38d96.png\")
<\/figure><p> <\/p><\/p>\n- \n
- When “Auto resample” is clicked: Total power drops to 0.2, which is not right.<\/li>\n<\/ul>\n
<figure>
![\"\"](\"https:\/\/uploads-us-west-2.insided.com\/zemax-en\/attachment\/b4d0b444-4633-4f3f-bc4a-0d9a09840a8f.png\")
<\/figure><p> <\/p><\/p>\n- \n
- When I reduced the X-width and Y-width, i.e., the window size while keep the sampling number the same: Total power increases to 1.7, which does not make sense because there is clipping now.<\/li>\n<\/ul>\n
<figure>
![\"\"](\"https:\/\/uploads-us-west-2.insided.com\/zemax-en\/attachment\/691d9adb-f629-4e50-94c6-f56ceed35621.png\")
<\/figure><p> <\/p><\/p>\n- \n
- When I try to over sample it with original grid size by increasing the sampling number, total power increases to 3.9. This is to say the higher the resolution, the higher the total power is.<\/li>\n<\/ul>\n
<figure>
![\"\"](\"https:\/\/uploads-us-west-2.insided.com\/zemax-en\/attachment\/9d83999f-896d-437e-b206-5a970f2734c4.png\")
<\/figure><p> <\/p><\/p>\n- \n
- When I try to under sample it with original grid size by decreasing the sampling number, total power decreases significantly to 0.06. This is to say the lower the resolution, the lower the total power is.<\/li>\n<\/ul>\n
<figure>
![\"\"](\"https:\/\/uploads-us-west-2.insided.com\/zemax-en\/attachment\/ab867886-8c9f-454a-99f3-5c215ac154f1.png\")
<\/figure><p>Is this possibly a BUG in Zemax POP calculation?<\/p><p>The version 2024.R1 also has bug: changing sampling does not change total power at all. It remains 1.<\/p><figure>![\"\"](\"https:\/\/uploads-us-west-2.insided.com\/zemax-en\/attachment\/2438bcaa-ea9c-4622-9017-7f9821cd1ac3.png\")
<figcaption>With a big grid size 2 x 2<\/figcaption><\/figure><figure>![\"\"](\"https:\/\/uploads-us-west-2.insided.com\/zemax-en\/attachment\/aa7d8c14-5225-40ec-a4b9-2caaa0a8464d.png\")
<\/figure><p>With a small grid size 0.1 x 0.1 so the beam is highly clipped, how come the total power is still 1?<\/p><p> <\/p><p>Thank you!<\/p><p>Di<\/p><\/p>\n","protected":false},"template":"","class_list":["post-392269","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["477029","50911"],"_bbp_author_ip":["206.47.231.172"],"_btv_view_count":["338"],"_bbp_topic_status":["unanswered"],"_bbp_notification_enabled":["477029"],"_bbp_topic_id":["392269"],"_bbp_forum_id":["27816"],"_bbp_engagement":["50911","477029"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["392386"],"_bbp_last_active_id":["392386"],"_bbp_last_active_time":["2024-11-01 10:39:21"]},"test":"di-changlumentum-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392269","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/392269\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=392269"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- When I try to under sample it with original grid size by decreasing the sampling number, total power decreases significantly to 0.06. This is to say the lower the resolution, the lower the total power is.<\/li>\n<\/ul>\n
- When I try to over sample it with original grid size by increasing the sampling number, total power increases to 3.9. This is to say the higher the resolution, the higher the total power is.<\/li>\n<\/ul>\n
- When I reduced the X-width and Y-width, i.e., the window size while keep the sampling number the same: Total power increases to 1.7, which does not make sense because there is clipping now.<\/li>\n<\/ul>\n
- When “Auto resample” is clicked: Total power drops to 0.2, which is not right.<\/li>\n<\/ul>\n
- When resampling is completely off: Total power is 1, which is desired.<\/li>\n<\/ul>\n