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

13 Comments

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

Example 1

  • Focal length -109.09mm
  • Magnification 2.00x
  • 4 group 9-lens configuration
  • One plane diffraction plane (the first group)
  • Master lens
  • Focal length f = 293.76mm
  • Fno. 2.91
  • Half angle ω = 4.21 °
  • Image height Y = 21.64mm
  • The overall length of the lens 275.41mm
  • BF 53.79mm
  • 15 sheets 11 groups lens configuration
  • Protective glass 1
  • Rear filter 1
  • UD 2
  • Fluorite 1

Canon Patents

  • I and the diffraction plane cemented surface of the cemented lens closest to the object side
  • This arrangement can suppress the flare

Source: [EG]

cr

13 Comments

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

Patent: Dual Motor For Autofocus on STM Lenses

UPDATE
This is what we’re told this patent actually is.

“This is not a focus drive patent, it’s a SPRINGLESS LEAF SHUTER mechanism. EF Leaf shutter lens that will allow a true 1/1000s are on the drawing board, they just can’t make the Cmos do a clear scan and dump faster than 1/250s no matter what they have tried , and HSS make you loose way too much power.”

Original Post
A patent showing a dual motor autofocus for STM lenses has appeared. There is one motor for the STM and a secondary DCM motor. It looks like one motor assists starting the second motor for a faster and smoother operation. The patent information below is Google Translated. If anyone can clarify the patent, please do so in the forum thread associated with this post.

newstm

  • 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

Source: [EG]

cr

20 Comments

Patent: Dual Pixel Phase Detect AF While in AI Servo

A new patent that integrates normal AF with phase detect AF has become public. This sort of technology could very much improve AF tracking in burst mode. Perhaps we’ll see this technology on the upcoming EOS 7D replacement?

If anyone can further clarify this patent, please do.

Phase Detect AF w/Normal AF

Phase Detect AF w/Normal AF

Patent Publication No. 2014-142372

  • Published Date 2014.8.7
  • Filing date 2012.1.22

Source: [EG]

cr

39 Comments

Patent: Canon EF 180mm f/3.5 DO Macro

Patent: Canon EF 180mm f/3.5 DO Macro

This is the first I have seen this sort of patent. Canon has filed an optical formula patent for a diffractive optic macro lens. What better lens to upgrade with a DO version than the long-in-the-tooth Canon EF 180 f/3.5L Macro?

Patent Information (Google Translated)

  • Patent Publication No. 2014-137484
    • Publication date 2014.7.28
    • Filing date 2013.1.17
  • Example 1
    • Focal length f = 180.00mm
    • Shooting magnification ∞ 0.5x 1.0x
    • Fno. 3.50-4.50-5.20
    • Half angle ω = 6.85 °
    • Image height 21.64mm
    • The overall length of the lens 202.38mm
    • BF 52.18mm

Source: [EG]

cr

17 Comments

Patent: 45x Zoom for Waterproof Camera

Patent: 45x Zoom for Waterproof Camera

This patent may show where the next PowerShot D series camera is heading. Below is a patent for a 45x zoom lens that is for a waterproof/dustproof application.

  • Patent Publication No. 2014-109664 (Google Translated)
    • Publication date 2014.6.12
    • Filing date 2012.11.30
    • Related 2014-109665,2014-109666
  • Example 1
    • Zoom ratio 44.41
    • Focal length f = 4.62-13.02-205.00mm
    • Fno. 3.91-6.14-9.00
    • Half angle ω = 36.14-16.58-1.08 °
    • 99.33-103.38-113.64mm overall length of the lens
    • BF 12.11-10.81-4.28mm

Source: [EG]

cr

21 Comments

Patent: Another Multi Layer Related Sensor Patent from Canon

Patent: Another Multi Layer Related Sensor Patent from Canon

Below is another patent for a multi-layer related sensor patent from Canon has come to light. This is the third one that has appeared in the last month or so.

Keith over at Northlight breaks it down in a way that’s easy to understand. “The issue addressed, is light of the ‘wrong’ colour being reflected from one layer into another, which reduces the ability of different layers to respond to photons of only a particular range of colours. This has the potential to greatly improve the colour accuracy and fidelity of such stacked sensor designs.

Patent Publication No. 2014-130890 (Google Translated)

  • Publication date 2014.7.10
  • Filing date 2012.12.28
  • Multilayer sensor drawback of
  • G is light, the image quality is degraded and reflected by the surface of the layer between the G and B layer, re-enters the B layer
  • Canon patents
  • The provision of the dielectric film and the insulating film as an anti-reflection film
  • First insulating layer, B layer, a dielectric film, insulating film, dielectric film, G layer, a dielectric film, insulating film, insulating film, dielectric film, the R layer
  • By increasing the thickness of the dielectric film, to suppress the multiple reflection
  • The dielectric film is between the G layer and B layer, the reflectance with respect to G is lower than B

Source: [EG] via [NL]

cr

21 Comments