Archive for the ‘Canon Patents’ Category

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