Canon Files Apodization Filter Patent for 135mm f/2

According to the Egami Blog, Canon has filed a patent for a 135mm f/2 optical design containing two apodization filters.
 
From Wikipedia:
Apodization is an optical filtering technique, and its literal translation is "removing the foot". It is the technical term for changing the shape of a mathematical function, an electrical signal, an optical transmission or a mechanical structure. In optics, it is primarily used to remove Airy disks caused by diffraction around an intensity peak, improving the focus.
Patent Details (Google Translated)
 
  • Patent Publication No. 2016-218444
  • Published 2016.12.22
  • Submitted 2015.5.20
  • Focus distance 130.98
  • F-number 2.06
  • AOV 9.38
  • Like high 21.64
  • Overall length of the lens 159.05
  • BF 53.99
  • Good blurred image at all angles, even if there is a vignetting
Posted: 12/26/2016 5:43:12 AM CT   Posted By: Sean
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