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Canon Patent Applicaton: Diffractive Optics
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Canon Patent Applicaton: Diffractive Optics

Canon has never stopped looking to advance diffractive optic elements.  I'm hoping that this sooner than later translates into some super uber cool Canon RF lenses.

This patent applications seems to be improving the transmittance of the diffractive element over a wide wavelength range.  It appears that this diffractive element is using ITO (indium tin oxide) fine particles.

Japan Patent Application 2020-086106

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How to view Japan Patent applications.

Unfortunately, there's no direct way of linking to the patent application (sad!) however, this is the easiest process to view a japan patent or application.

  1. Go to the Japan Patent Office search page.
  2. If it's a patent application (they are usually in the format of Year-Number ie: 2017-011300) then type the patent application number into the second field down from the top where it says publication of patent application. 
  3. Click on search.
  4. Then click on the patent application number link, and there's the patent application!

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