Archive for: patent

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.

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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]

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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]

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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

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]

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Patent: Noise & Aliasing Reduction for Small Pixels

Patent: Noise & Aliasing Reduction for Small Pixels

A patent for APS-C?
Canon has filed a patent to reduce the noise and aliasing in small pixels.

This sort of patent could benefit higher megapixel APS-C cameras, like the EOS 7D Mark II.

Source: [EG]

EOS 7D Body at B&H Photo for $1199

 

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Patent: Supertelephoto DO Lenses With Macro Features

Patent: Supertelephoto DO Lenses With Macro Features

400mm, 600mm and 800mm DO Lenses
Patents have shown up showing new DO optical formulas with 2:1, 1:1 and 1:4 macro functions.

Adding macro functionality to super telephoto lenses would be a pretty cool feature. It’s also good to see DO patents continue to show up, it’d be nice to see new DO lenses.

Read the patent here

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Patent: Tamron 150-600 f/5-6.3

Patent: Tamron 150-600 f/5-6.3

A new Supertelephoto Zoom?
This is definitely a lens that Tamron would make. If you need length and you’re on a budget, this could be a one of a kind option if and when it comes to market.

Patent Publication No. 2012-208434

  • Release Date 2012.10.25
  • Filing date 2011.3.30

Example 1

  • Focal length f = 152.3068-582.0002mm
  • FNo. = 5.12-6.45
  • 2ω = 16.30-4.23 ° angle of view
  • 18 sheets 13 groups lens configuration
  • 5-group configuration of positive and negative positive negative
  • Inner Focus (the fourth group focus group)
  • Stabilizer (front group of the fifth group of anti-vibration group)
  • Reduce the size of the group of anti-vibration and focus group
  • To shorten the focal length of the front group of the fifth group, reduce the amount of movement of the time the anti-vibration
  • Joining the front group lens and the fifth group, when the spherical aberration correction of the anti-vibration, axial chromatic aberration and chromatic aberration of magnification

Source: [EG]

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Patent: EF 14mm f/2.8 With a New Coating

Patent: EF 14mm f/2.8 With a New Coating

New Coating
Below seems to be a patent for large protruding front elements, that will help with issues of reflection and cleaning. This could possibly appear in the much talked about EF 14-24 f/2.8L.

 

Patent Publication No. 2012-159723

  • 2012.8.23 Release Date
  • 2011.2.1 filing date

Example 1

  • F = 14.3mm focal length
  • Fno. = 2.89
  • Half angle ω = 56.6 °
  • 14 images in 10 groups lens configuration
  • Existing coating roughness
  • Will making cleaning the front element easier and possibly less destructive

Canon patent

  • (Coating applied to one surface of a lens) thin film layer
  • Having a plurality of tubular spaces are arranged parallel to the tube
  • Maximum opening diameter of the tubular space below 400nm
  • The inorganic oxide materials (silica, titania)
Source: [EG]

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Patents: 28-135 f/4-5.6 & 28-300 f/3.5-5.6

Patents: 28-135 f/4-5.6  & 28-300 f/3.5-5.6

More Patents
A couple of new lens formula patents which seems to address lowering chromatic aberrations in a new way

Patent Publication No. 2012-163746

  • 2012.8.30 Release Date
  • 2011.2.7 filing date

Example 4

  • Zoom ratio 4.67
  • 56.11 – - 131.85mm f = 28.21 focal length
  • Fno 4.12 -. 4.89 – 5.77
  • Half angle of view ω = 37.48 – 21.09 – 9.32deg.
  • Image height 21.64mm
  • 242.67 – - 266.43mm 224.00 overall length of the lens
  • BF 55.79 – 70.40 – 82.95mm
  • 20 sheets of 14 group lens configuration
  • Two two-sided aspherical
  • Three low-dispersion glass
  • Four Super UD glass
  • 102.40mm effective diameter of the first surface
  • 5-group zoom negative positive negative

Example 5

  • Zoom ratio 10.31
  • 93.64 – - 307.06mm f = 29.77 focal length
  • Fno 3.31 -. 4.71 – 5.85
  • Half angle of view ω = 36.00 – 13.01 – 4.03deg.
  • Image height 21.64mm
  • 263.66 – - 304.01mm 209.34 overall length of the lens
  • BF 61.72 – 89.40 – 106.84mm
  • 18 sheets 12 groups lens configuration
  • Three 3 aspherical surface
  • Three low-dispersion glass
  • 2 UD glass sheets
  • 84.36mm effective diameter of the first surface
  • 5-group zoom negative positive negative
  • In the zoom lens of the positive lead type, reducing the chromatic aberration of magnification of the secondary
Source: [EG]

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