Archive for: patent

Patent: EF-M 18-40 Pancake

Patent: EF-M 18-40 Pancake

A patent showing an EF-M 18-40  f/3.5-5.6 pancake has come to light. With this patent a bunch of other optical formulas also appear, such as an 18-55 pancake, 10-20, and a 9-18. We currently have an EF-M 11-22, which is probably rooted from the latter two optical formulas.

A zoom pancake would be a nice addition to the geographically fragmented and oddly marketed EOS M line.

  • Patent Publication No. 2014-6275
    • Publication date 2014.1.16
    • Filing date 2012.6.21
  • Example 7
    • Zoom ratio 3.00
    • Focal length f = 18.10-37.01-54.30mm
    • Fno. 4.20-6.20-8.20
    • Half angle ω = 36.92-20.17-14.06 °
    • Image height Y = 13.60mm
    • 64.74-56.63-62.13mm lens length
    • BF 0.50mm
  • Canon patents
    • The possible vibration damping by the second lens group
    • Feeding whole, front focus, focusing, rear focusing, etc.

Source: [EG]

cr

16 Comments

Patent: Microadjustment Automated

Patent: Microadjustment Automated

A patent has been published outlining automatic microadjustment for Canon DSLRs and lenses. This would definitely be a handy feature going forward. Especially if you rent lenses.

  • Patent Publication No. 2013-254194
    • Publication date 2013.12.19
    • Filing date 2012.5.11
  • Issues surrounding the AF adjustment
    • The looseness of the phase difference AF sensor, because the AF accuracy is worse, need AF adjustment
    • It is not done correctly the AF adjustment in your environment
    • Necessary facilities such as service center
  • Canon patents
    • Automation of the AF adjustment
    • Procedure
      • Let me be the difference adjusted value of the phase difference AF and contrast AF
      • To determine the reliability

Source: [EG]

cr

70 Comments

Patent: 16-120mm f/3.5-5.6 IS STM

Patent: 16-120mm f/3.5-5.6 IS STM

The following patent is most likely for the EF-M range of lenses. Also appearing alongside the 16-120 IS STM in the patent is an 18-55 IS STM and an 18-200 f/3.5-6.3 IS STM.

  • Patent Publication No. 2013-257507
    • Publication date 2013.12.26
    • Filing date 2012.6.14
  • Example 1
    • Zoom ratio 2.87
    • Focal length f = 18.58 – 27.82 – 53.36mm
    • Fno 3.60 -. 4.27 – 5.69
    • Half angle ω = 36.33 – 26.15 – 14.36 °
    • Image height Y = 13.66mm
    • 86.23 – – 104.79mm 78.22 overall length of the lens
    • BF 0.50mm
    • 13 pieces of 11-group lens configuration
    • Three four-sided aspherical
  • Example 3
    • Zoom ratio 10.39
    • Focal length f = 18.60 – 60.12 – 193.23mm
    • Fno 3.55 -. 5.59 – 6.60
    • Half angle ω = 36.29 – 12.80 – 4.04 °
    • Image height Y = 13.66mm
    • 151.48 – – 184.39mm 118.58 overall length of the lens
    • BF 0.50mm
    • 18 pieces of 14-group lens configuration
    • Three three-sided aspherical
    • One UD glass
  • Example 4
    • Zoom ratio 7.14
    • 51.87 – – 117.70mm 16.48 focal length
    • Fno 3.60 -. 5.30 – 5.88
    • Half angle ω = 39.65 – 14.75 – 6.62 °
    • Image height Y = 13.66mm
    • 138.55 – – 162.35mm 114.75 overall length of the lens
    • BF 0.50mm
    • 17 pieces of 13-group lens configuration
    • Two two-sided aspherical
    • One UD glass
  • Canon patents
    • Vibration control
    • Inner focus

Source: [EG]

cr

17 Comments

Patent: Canon EF 300-600 f/5.6 w/1.4x TC

Patent: Canon EF 300-600 f/5.6 w/1.4x TC

Super telephoto patent
A new Canon patent showing other lens formulas using a built-in 1.4x teleconverter. Two of the primary lenses are an EF 300-600 f/5.6L IS 1.4x and a 600 f/4L IS with a built in TC.

The same patent also shows the EF 200-400 f/4L IS 1.4x TC. Perhaps Canon sees value in this setup for longer lenses? Here’s hoping so.

Example 2

  • Focal length f = 585.10mm
  • Fno. 4.12
  • Half angle ω = 2.12 °
  • Image height Y = 21.64mm
  • The overall length of the lens 467.32mm
  • BF 83.15mm
  • Teleconference insertion
  • Focal length f = 819.00mm
  • Fno. 5.77
  • Half angle ω = 1.51 °

Example 3

  • Zoom ratio 1.90
  • Focal length f = 307.50 – 585.00mm
  • Fno. 5.88
  • Half angle ω = 4.02 – 2.12 °
  • Image height Y = 21.64mm
  • The overall length of the lens 405.00mm
  • BF 75.70mm
  • Teleconference insertion
  • Focal length f = 427.00 – 812.33mm
  • Fno. 8.17
  • Half angle ω = 2.90 – 1.53 °

Source: [EG]

cr

175 Comments

Patent: A Pellicle Mirror by Canon

Patent: A Pellicle Mirror by Canon

Canon coming full circle
A patent revealing a pellicle mirror by Canon has made its way to public eyes. It seems everyone is researching the technology. Canon did this a long time ago in the Pellix, F1 High Speed, EOS RT and EOS 1N RS.

Patent Publication No. 2013-218241

  • Publication date 2013.10.24
  • Filing date 2012.4.12

Canon patent

  • Pellicle mirror
  • The transmitted light image sensor in, I lead the OVF the reflected light
  • Reflectance (transmittance) variable
  • (Low transmittance) high set the reflectance OVF when, at the time of imaging is set (high transmittance) low reflectance

Source: [EG]

cr

49 Comments

Sigma Sports Line Updates Next? [CR1]

Sigma Sports Line Updates Next? [CR1]

New 300 f/2.8 OS & 400 f/2.8 OS lenses coming?
We’ve been told again that Sigma will likely announce new “sport lenses” some time in 2014. The first two to come will be the 300mm f/2.8 OS and 400mm f/2.8 OS. One of these lenses may be in testing for the Sochi Olympics this winter. A new 500mm and 800mm zoom lens could also be on the horizon, but less is known about them at this time.

A recent patent for a 300 f/2.8 from Sigma does make a good case for the updates.

cr

23 Comments

Patent: Canon Foveon Sensor

Patent: Canon Foveon Sensor

Canon still working on Foveon Technology
Canon has been working on 3 layer Foveon sensor technology for a while now, it still hasn’t appeared in a camera and we haven’t heard anything to say it will. However, the fact they continue to spend resources on it, tells us there is definitely a good application for the technology.

Patent Publication No. 2013-93553 (Google Translated)

  • Publication date 2013.5.16
  • Filing date 2011.10.4

Imaging element of three-layer structure

  • Photodiode deep layer (hereinafter, PD) in the charge is diffused into the substrate
  • Thus sensitivity is poor red

Canon patent

  • I as a photonic crystal of irregular shape, the boundary surface of the PD of red or green,
  • In the periodic structure of uneven spacing, less than twice the 1/4 times or more the wavelength of light, or I shall be two times or less 1/2 times or more
  • Irregular shape has the properties to be spatially-localized or resonant light
  • The incident light is diffracted, it combines with the light of the boundary plane, the resonant
  • Prolonged exists than normal, the light becomes easy to be absorbed by the PD Thus

Source: [EG]

cr

41 Comments

Patent – Tilt Shift Lens Related

Patent – Tilt Shift Lens Related

A new tilt-shift related patent from Canon
A patent to help usability by changing the grind lines on the EVF or LCD when tilting, shifting and rotating. This is definitely something I could see being useful in a tilt-shift macro.

Patent Publication No. 2013-81129 (Google Translation)

  • Publication date 2013.5.2
  • Filing date 2011.10.5

Shooting assist functions suitable for tilt lens

  • Rotate display grid lines
  • The angle information of the tilt lens to determine the angle of the grid lines
  • To align in the direction of change of focus, the angle of the grating lines, easy to compose the picture

Source: [NL] via [EG]

cr

7 Comments

Patent: EF 400 f/4 DO IS II

Patent: EF 400 f/4 DO IS II

Another DO patent
We haven’t seen a new DO lens in a long time, but the patents haven’t stopped. It looks like Canon is continuing the R&D, I’d love to see it go somewhere.

Interpretation and self-description of the patent literature

  • Patent Publication No. 2013-64858
  • 2013.4.11 Release Date
  • Filing date 2011.9.16

Example 1

  • Focal length f = 392.12mm
  • Fno. 4.12
  • Half angle of ω = 3.16 °
  • Image height Y = 21.64mm
  • 262.14mm length lens
  • BF 69.97mm
  • Two fluorite
  • Materials and anomalous partial dispersion DOE to use, reduce the chromatic aberration
  • Refractive power of the diffractive surface
  • Strong, but can reduce the chromatic aberration of the element itself, flare increases
  • The weaker, other optical element DOE play a role
  • Refractive optical unit
  • DOE anomalous partial dispersion and bonding materials
  • DOE aspherical surface on the opposite side of the
  • Vibration control
  • Inner Focus

Source: [EG] | Canon EF 400 f/4 DO IS

36 Comments

Patent: Canon EF 14 f/2.8 with Fluorite

Patent: Canon EF 14 f/2.8 with Fluorite

Patent for wide angle fluorite concepts
Canon has filed patent for a wide angle fluorite concept. Such a patent could be part of a new ultra-wide zoom lens, perhaps a 14-24 or a replacement to the 16-35. Egami also thinks it’s possible this patent could be for the EF-M mount. It’s an interesting read, even when Google translated. Read the full patent here.

  • Patent Publication No. 2013-37339
    • 2013.2.21 Release Date
    • Filing date 2011.7.12
  • Example 1
    • Zoom ratio 1.00
    • Focal length f = 1.00mm
    • Fno. 2.90
    • Half angle of view ω = 56.66 °
    • Image height Y = 1.52mm
    • 9.51mm length lens
    • BF 2.82mm
    • 6 aspherical surfaces, the first surface 25
    • Punctually
  • Example 3
    • Zoom ratio 2.06
    • 2.06mm – f = 1.00 focal length
    • Fno 2.79 -. 4.00
    • Half angle of view ω = 51.27 – 32.82 °
    • 1.33mm – Y = 1.25 image height
    • 8.55mm – 8.79 length lens
    • BF 2.41 – 3.46mm
    • Aspheric first surface, the fifth surface, the first surface 26
    • Positive and negative positive negative
  • Example 6
    • Zoom ratio 1.00
    • Focal length f = 1.00mm
    • Fno. 2.90
    • Half angle of view ω = 87.35 °
    • Image height Y = 21.60mm
    • 9.51mm length lens
    • BF 2.82mm
    • 6 aspherical surfaces, the first surface 25
    • Punctually

Source: [EG]

cr

17 Comments