Patents are always interesting to look at from a purely speculative angle, due to the hit or miss nature of if they actually make it to market or not. It gives you a look into the R&D of our favorite companies and what they are thinking the future of their business could be.



If Canon’s latest patent is any indication, the DSLR king doesn’t feel that mirrors are going any where any time soon. A new patent, discovered by Egami, reveals a new multi-layered auto-focus sensor. Think of it like Sigma’s Foveon Technology, only instead of each layer picking up different colors, each layer is monitoring a different aspect of the scene you are focusing in.

The idea is pretty interesting, if you ask me. I could be wrong, but since this is a dedicated AF sensor, it would seem that this is technology meant for use in a DSLR, which utilizes a dedicated AF sensor (unlike mirrorless systems where the AF must be done on the imaging sensor as well).


Below you can read the machine translated patent details. It sounds like it could be a pretty accurate system.

Patent Publication No. 2015-37217

  • Published 2015.2.23
  • Filing date 2013.8.12

Canon patent

  • AF sensor
  • In the depth direction, I comprises a first layer, the second layer, the photoelectric conversion portion of the third layer
  • The second layer is for monitoring, detecting the amount of light that is received in real-time, to control the accumulation time
  • The third layer in a bright environment, the dark environment so that the use of the first layer, sensitivity can be switched
  • Furthermore, in a dark environment is used by adding the first and third layers

What are your thoughts on this interesting Canon Patent? Do you see this making it into a future DSLR? Leave a comment below and let us know what you think!

[via Canon Rumors]