Every story and comment from the Hacker News API, in a layout borrowed from 2001.
A comment on FFTs and Optical Lenses. Parent comment
#1: I made this more clear by saying that this holds for a lens with focal length f ... when d=f.
#2: I made the distinction between the DFT and CFT more clear. I never say they're the same thing, but that they are closely related.
#3: I added a paragraph about the complexity of the FT. Thank you for mentioning that.
#4: I didn't want to include the derivation -- I wanted to show the end result. I pointed the readers to Goodman if they want the derivation.
I also addressed the paraxial approximation in the footnotes as well.
There are no comments on this comment yet.
#1: I made this more clear by saying that this holds for a lens with focal length f ... when d=f.
#2: I made the distinction between the DFT and CFT more clear. I never say they're the same thing, but that they are closely related.
#3: I added a paragraph about the complexity of the FT. Thank you for mentioning that.
#4: I didn't want to include the derivation -- I wanted to show the end result. I pointed the readers to Goodman if they want the derivation.
I also addressed the paraxial approximation in the footnotes as well.