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Canon Patent Application: Improved EVF optics
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Canon Patent Application: Improved EVF optics

We all talk about the number of dots on the EVF but rarely do we get into the workings of the more important aspect of the EVF, which is the optics.

In this patent application, Canon is looking at providing a high magnification, with a good eye point relief.  This actually allows for higher magnification, larger viewable viewfinder image, and a more comfortable viewing. Something we all can get behind.

In the   finder optical system used in the observation device, in order to obtain good optical performance while maintaining a high observation magnification (large observation viewing angle) and long eye relief, the lens configuration of the finder optical system and each It is important to properly set the refractive force of the lens. In addition, it is also important to appropriately set the refractive index of the material of each lens. When an image display element having a smaller image display surface is used, it is important to appropriately set the ratio of the refractive power of the finder optical system to the size of the image display surface.

Japan Patent Application 2020-170022

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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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