gudong 发表于 2003-11-22 20:00:00

question about field flattener



I am using a Newport PAC040, (you should be able to find data through lens catalogs), and the major aberration is Petzval. I am thinking to use a negative lens near image plane as field flattener, but do not how to design such a lens. generally, what principle should I follow?

thanks in advance!



gudong 发表于 2003-11-26 13:46:00

question about field flattener



noboday answer this?
Anybody can give a guildline on how to choose lens?
when I need pick some lens from catalogs, I only know Focus length and Diameter, but there is so many of such lens with same F and D...



ukyochen 发表于 2003-11-26 17:00:00

gudong 发表于 2003-11-26 20:13:00

question about field flattener



well, if I design lens, I probablly can set 2 faces as variable and optimize them. however, in real world, you would not find such lens. so my question is: during the system design, how to choose lens from catalogs to minimize aberration?



ukyochen 发表于 2003-11-26 21:30:00

gudong 发表于 2003-11-27 15:54:00

question about field flattener

what puzzles me is that there are so many different lens from different companies but all have same focus length or similar diameter. I am sure they are all different, maybe different glass V# or different curvature...how do I select a suitable lens? do I need look into all these detail spec?

ukyochen 发表于 2003-11-27 16:52:00

gudong 发表于 2003-11-28 09:35:00

question about field flattener

Thank you very much, ukyochen!
now I can see it needs lots of work to select good lens during the system design.
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