Egami (translated) spotted a patent filed by Canon that uses more of the DSLR body as a heat sink. This should help to cool down the electronics and possibly also the sensor. Could also be useful for 4k video processing.

• Patent Publication No. 2014-171141
  • Published Date 2014.9.18
  • Filing date 2013.3.5
• Canon patents
  • , An electric path for heat imaging devices , electric heating member group, member boric mount ring portion (heat sink) heat to low thermal conductivity of the resin, and the order of the mount ring

Egami spotted a patent filed by Canon for an apodization filter. Such a filter should not decrease light and allows for phase difference detection

• Patent Publication No. 2014-63100
  • Published Date 2014.4.10
  • Filing date 2013.9.24
• Canon purpose of patents
  • Improvement of the blurred image by apodization filter
  • And suppress the reduction in light intensity
  • Symmetry of the permeability is achieved to ensure
• Canon patents
  • Split the exit pupil, and receives by dividing also the imaging surface
  • The divided regions of the exit pupil, there is not, as with a filter apodization

[via Egami]

Egami (transklated) spotted a patent filed by Canon for an OLPF that can move along the optical axis, hence yielding a different effect on the sensor,

• Patent Publication No. 2014-146935
  • Published Date 2014.8.14
  • Filing date 2013.1.28
• Canon patents
  • OLPF effect of the variable
  • OLPF using the diffusion plate, the movement of the optical axis direction, the diffusion degree of the variable
  • Automatic movement corresponding to the false color

Egami (translated) spotted a patent filed by Canon for a new, faster auto-focus that appears to be the next step in STM lens technology. The AF in the patent is driven by 2 motors, the main STM and an auxiliary DCM motor. This should be useful especially for continuous shooting & focusing in the videographers domain.

Machine translated text:

• Patent Publication No. 2014-164106
  • Published Date 2014.9.8
  • Filing date 2013.2.25
• Example 1
  • Moving the aperture one two motors
  • Main motor STM
  • Auxiliary motor DCM
  • And then rotate the first auxiliary motor, to assist the acceleration of the main motor

Egami (translated) spotted a patent filed by Canon for a 55-300mm lens with image stabilisation and inner focusing (lens does not extend when focusing). The patent ale refers to a EF-S 55-250mm F4-5.6 IS STM lens

• Patent Publication No. 2014-145960
  • Published Date 2014.8.14
  • Filing date 2013.1.30
• Example 3
  • Zoom ratio 5.20
  • Focal length f = 56.80-135.16-241.32mm
  • Fno. 4.16-5.18-5.88
  • Half angle ω = 13.52-5.77-3.24 °
  • Image height Y = 13.66mm
  • The overall length of the lens 153.89-191.28-208.89mm
  • BF 38.57-57.95-65.38mm
• Example 5
  • Zoom ratio 5.20
  • Focal length f = 56.37-133.75-293.01mm
  • Fno. 4.16-5.18-5.88
  • Half angle ω = 13.62-5.83-2.67 °
  • Image height Y = 13.66mm
  • The overall length of the lens 155.00-190.52-210.00mm
  • BF 38.40-54.49-65.40mm
• Canon patents
  • Inner focus
  • Vibration control

Egami (translated) spotted a patent filed by Canon regarding a faster and more accurate AF method for continuous shooting. If I understood the patent correctly, the method is using the “classic” AF method (using the dedicated phase difference sensor) for the first shot, and phase difference AF on the “image plane” (i.e. the image sensor) for all subsequent shots. The advantage: you do not need to move the mirror for focusing after the first shot, hence allowing for a higher frames per seconds rate.

Could this patent point to the EOS 7D replacement we expect to be announced in September? Possibly. A higher fps is one of the features most of us think will be implemented in the camera Canon is going to announce.

• Patent Publication No. 2014-142372
  • Published Date 2014.8.7
  • Filing date 2012.1.22
• Canon patents
  • I use the phase difference AF the first time
    • I use the OVF
  • I use the image plane phase difference AF with the second and subsequent
    • There is no need to wait for the stable state up mirror, the mirror down