Archive for the ‘Canon Patents’ Category

Patent: 10-22mm f/3.5-4.5 With a Liquid Element

A patent showing a 10-22 f/3.5-4.5 optical formula with a liquid element has shown up. I think it’s safe to say that this isn’t going to end up as a consumer product any time soon, but it’s still pretty interesting.

liquidelementpatent

  • Patent Publication No. 2014-145883 (Google Translated)
    • Published Date 2014.8.14
    • Filing date 2013.1.29
  • Example 4
    • Zoom ratio 2.07
    • Focal length f = 10.30-13.12-21.35mm
    • Fno. 3.23-3.62-4.63
    • Half angle ω = 52.86-46.03-32.50 °
    • Image height 13.60mm
    • The overall length of the lens 135.13-133.91-135.09mm
    • BF 0.15mm
  • Canon patents
    • And by varying the shape of the boundary surface, thereby changing the refractive power
    • Zooming, and has a refractive power element is positive, the element is negative
    • And reduce the variation of the curvature

Source: [EG] via [NL]

cr

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Patent: Canon EF 2.0X TC With Diffractive Optics Element

dotc

A patent showing a 2x teleconverter with a diffractive optic element (DO) has surfaced. The 2.0x teleconverter could use a little length reduction, though I’m not sure if DO would reduce the size of the current TC all that much.

Patent Publication No. 2014-145870 (Google Translated)

  • Published Date 2014.8.14
  • Filing date 2013.1.29

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Patent: Canon 2mm f/1.4 Lens for Small Sensors

A patent for a 2mm f/1.4 lens from Canon has appeared. This type of lens would be for a small sensor device such as a compact video camera or action camera.

canon2mmpatent

Patent Publication No. 2014-197128 (Google Translated)

  • Published  Date 2014.10.16
  • Filing date 2013.3.29

Example

  • Focal length f = 2.03mm
  • Fno. 1.44mm
  • Half angle ω = 59.18 °
  • Image height 3.00mm
  • The overall length of the lens 32.17mm
  • BF 0.51mm
  • Canon patents
  • Focus position of the periphery of the screen is shifted If you install the dome cover
  • And suppress the deviation of the focus by changing the air space of the lens in accordance with the presence or absence of the dome cover

Source: [EG]

cr

7 Comments

Patent: Variable Diffusion Focusing Screen

A patent for a variable diffusion focusing screen from Canon is out there. The patent shows a focusing screen capable of showing sharp areas as well as giving the shooter a better idea of depth of field. Current DSLRs are quite difficult to manually focus accurately using fast primes with the default focusing screens. There are focusing screens out there you can swap out, but having it all in one screen would be ideal.

patentfocusingscreen

Patent Publication No. 2014-191184

  • Published Date 2014.10.6
  • Filing date 2013.3.27

Canon patents

  • Spreading factor variable finder screen
  • First diffusion rate
  • Brightness priority
  • Setting of low diffusivity and high transmittance
  • Second diffusion rate
  • Blur priority
  • Setting of high diffusivity and low transmittance
  • The partially changed spreading factor according to the focusing range

Source: [EG] via [NL]

cr

50 Comments

Patent: Improved Cooling for DSLRs

Canon has filed a patent that uses more of the camera as a heatsink to cool the electronics and most likely the sensor. I think this would be especially useful for video applications. 4K perhaps?

Patent Publication No. 2014-171141 (Google Translated)

  • Published Date 2014.9.18
  • Filing date 2013.3.5

coolingpatent

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

Source: [EG]

cr

13 Comments