Canon patent for 3.6-255mm f/2.8-7 PowerShot lens with built-in extender

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Interesting Canon patent for a 3.6-255mm f/2.8-7 lens for PowerShot cameras. The interesting fact: the lens has a built-in extender. With the extender, this lens becomes a 1000mm f/10 (35mm equivalent).

  • Patent publication number 2016-212210
    • Publication date 2016.12.15
    • Application date 2015.5.7
  • Example 1
    • Zoom ratio 66.07
    • Focal length 3.71 10.16 245.00
    • F number 2.90 4.99 7.07
    • Half angle of view (degree) 40.59 20.88 0.91
    • Lens total length 94.31 86.88 150.26
    • BF 9.45 16.24 9.56
    • Lens construction 11 groups 14 pieces
    • Aspheric surface 3 surfaces 2 pieces
    • UD 2
    • Super UD 1
  • Super telephoto (D)
    • Focal length 359.99
    • F number 10.39
    • Half angle of view (degree) 0.62
    • Lens total length 150.26
    • BF 3.56
    • Lens composition 13 groups 17 sheets
    • Aspheric surface 3 surfaces 2 pieces
    • UD 3
    • Super UD 1

Excerpt from the patent literature (note: machine translated):

[Claim(s)] [Claim 1] They are a main lens system which has a focus lens system which moves on the occasion of focusing, and an optical system which has a converter lens system which expands a focal distance of the whole system,
The aforementioned converter lens system is removable to space formed when the aforementioned focus lens system moves on the occasion of focusing,
When the aforementioned converter lens system has the lens part Gn of negative refracting power, and the lens part Gp of positive refracting power from the object side in order to the image side bordering on the widest air spacing in optical axis direction and a focal distance of fN and the aforementioned lens part Gp is set to fP for a focal distance of the aforementioned lens part Gn,
-9.3<fP/fN<-1.0
An optical system satisfying a becoming conditional expression.
[Claim 2] When [ of the aforementioned converter lens system ] setting a curvature radius of a lens surface on the object side to Rf and setting to Rr a curvature radius which is a lens surface on the image side most most,
2.0<(Rf+Rr)/(Rf-Rr)<100.0
The optical system according to claim 1 satisfying a becoming conditional expression.
[Claim 3] the aforementioned lens part Gn — most — a curvature radius of a lens surface on the image side — a time of setting a curvature radius of a lens surface on the object side to Rpf most of Rnr and the aforementioned lens part Gp,
-600.0<(Rnr+Rpf)/(Rnr-Rpf)<0.0
The optical system according to claim 1 or 2 satisfying a becoming conditional expression.
[Claim 4] An optical system of a description in any 1 item of Claims 1-3 characterized by comprising the following.
A positive lens of meniscus shape in which the aforementioned lens part Gn turned a concave surface to the image side in order from the object side at the object side.
Both lens surfaces comprise a cemented lens which joined a negative lens of concave shape, and, as for the aforementioned lens part Gp, the image side is a positive lens of a convex configuration.

[Claim 5] The aforementioned optical system is Sk about distance of the aforementioned converter lens system when it consists of zoom lenses and equips with the aforementioned converter lens system on an optic axis which it is most on an optic axis from a lens surface on the image side to the image surface. When [ of the aforementioned main lens system when the aforementioned main lens system is not equipped with the aforementioned converter lens system in telephoto end ] setting distance on an optic axis from a lens surface on the object side to the image surface to TD most,
0.005<Sk/TD<0.060
An optical system of a description in any 1 item of Claims 1-4 satisfying a becoming conditional expression.
[Claim 6] When [ of the aforementioned focus lens system / in / the aforementioned optical system consists of zoom lenses, and / telephoto end ] setting thickness on an optic axis of SSk and the aforementioned converter lens system to CTD for distance on an optic axis from a lens surface on the image side to the image surface most,
0.50<SSk/CTD<1.40
An optical system of a description in any 1 item of Claims 1-5 satisfying a becoming conditional expression.
[Claim 7] When setting thickness on an optic axis of M and the aforementioned converter lens system to CTD for movement magnitude of the aforementioned focus lens system when the aforementioned optical system consists of zoom lenses and it equips with the aforementioned converter lens system on an optic axis in telephoto end,
0.50<M/CTD<1.40
An optical system of a description in any 1 item of Claims 1-6 satisfying a becoming conditional expression.
[Claim 8] The aforementioned optical system is TD most about distance on an optic axis from a lens surface on the object side to the image surface, when it consists of zoom lenses and is not equipped with the aforementioned converter lens system on an optic axis in telephoto end. It is TD/TDA=1.0, when it equips with the aforementioned converter lens system on an optic axis and distance on an optic axis from a lens surface on the object side to the image surface is most set to TDA.
An optical system of a description in any 1 item of Claims 1-7 satisfying a becoming conditional expression.
[Claim 9] It is a zoom lens provided with a focus lens system which the aforementioned main lens system has a plurality of lens groups, and an interval of a lens group which is adjacent to on the occasion of zooming changes, and moves on the occasion of focusing,
An optical system of a description in any 1 item of Claims 1-8, wherein space formed when the aforementioned focus lens system moves in telephoto end is equipped with the aforementioned converter lens system.
[Claim 10] To order, the aforementioned main lens system is the 1st lens group of positive refracting power from the object side to the image side. The 2nd lens group of negative refracting power, the 3rd lens group of positive refracting power, the 4th lens group of negative refracting power, It is a zoom lens from which an interval of a lens group which comprises the 5th lens group of positive refracting power, and is adjacent to on the occasion of zooming changes, An optical system of a description in any 1 item of Claims 1-8, wherein space which said 5th lens group is the aforementioned focus lens system, and is formed when said 5th lens group moves in telephoto end is equipped with the aforementioned converter lens system.
[Claim 11] To order, the aforementioned main lens system is the 1st lens group of positive refracting power from the object side to the image side. The 2nd lens group of negative refracting power, the 3rd lens group of positive refracting power, the 4th lens group of negative refracting power, It comprises the 5th lens group of positive refracting power, and the 6th lens group of positive refracting power, It is a zoom lens from which an interval of a lens group which is adjacent to on the occasion of zooming changes, An optical system of a description in any 1 item of Claims 1-8, wherein space which said 5th lens group is the aforementioned focus lens system, and is formed when said 5th lens group moves in telephoto end is equipped with the aforementioned converter lens system.
[Claim 12] An imaging device having a solid state image pickup device which carries out light reception of the image formed by Claim 1 thru/or an optical system and the optical system of a description in any 1 item of Claim 11.

[via Egami]

Canon patent for 135mm f/2 lens with Apodization Filter

canon patent

Canon patent for a 135mm f/2 lens with apodization filter. This is not the first Canon patent for an optical formula with apodization filter, we got a 135mm f/2.8 and a 180mm f/3.5.

  • Patent publication number 2016-218444
    • Release date 2016.12.22
    • Application date 2015.5.20
  • Example
    • Focal length 130.98
    • F number 2.06
    • Field of View 9.38
    • Image height 21.64
    • Lens total length 159.05
    • BF 53.99
  • Canon patent
    • Even in the presence of vignetting, a good blurred image at all angle of view
[via Egami]

Canon Patent for RGWB 12 image sensor array

canon patentCanon patent for an RGWB image sensor.

  • Patent publication number 2016-208093
    • Release date 2016.12.8
    • Application date 2015.4.15
  • Canon patent
    • RGBW 12 array
    • Generate resolution data and color data, synthesize resolution data and color data, upconvert, process with mosaic processing (Bayer conversion), demosaic order

An excerpt from the patent literature after the break.

[via Egami]
Click here to open the rest of the article

Canon patent for electrically bending image sensor

canon patent

Indefatigable Canon Labs produced a new, innovative patent, an image sensor that bends when electricity is applied. Such a sensor would allow for optics with larger apertures, and also reduces light falloff at the edges that’s typical for flat CMOS sensors. This is not the first Canon patent for a curved sensor.

  • Patent publication number 2016-201425
    • Release date 2016.12.1
    • Application date 2015.4.8
  • Canon patent
    • Coupling the imaging element and the expansion / contraction section
    • As the stretchable portion expands, the amount of curvature of the imaging surface increases
    • The expansion and contraction section is electrically controlled

canon patent

Excerpt from the patent literature:

[Claim(s)] [Claim 1] An image sensor which has the 2nd page of an opposite side in the 1st page including an imaging region and said 1st page,
It is an imaging device provided with an elastic member combined with said 2nd page of the aforementioned image sensor,
The aforementioned elastic member can respond to an electrical signal input into the aforementioned elastic member, and it can expand and contract it over said 2nd page,
An imaging device characterized by said curved quantity of the 1st page enlarging as the aforementioned elastic member develops over said 2nd page.
[Claim 2] The aforementioned elastic member,
A plate-like elastic section,
A first electrode that was arranged at the aforementioned image sensor side to the aforementioned elastic section,
With the aforementioned image sensor side, a second electrode which was arranged at an opposite side is included to the aforementioned elastic section,
In plane view over said 1st page, said first electrode and said second electrode are arranged so that it may lap with the aforementioned imaging region at least among the aforementioned image sensors,
The imaging device according to claim 1, wherein it responds to voltage applied between said first electrode and said second electrode and the aforementioned elastic section expands and contracts over said 2nd page.
[Claim 3] The imaging device according to claim 1 or 2, wherein it expands [ the aforementioned elastic member ] and contracts radiately from a center of the aforementioned elastic member over said 2nd page in plane view over said 1st page.
[Claim 4] In plane view over said 1st page, the aforementioned imaging region has the rectangular shape which has a long side and a shorter side,
The imaging device according to claim 1 or 2, wherein the aforementioned elastic member expands and contracts in the direction of the aforementioned long side.
[Claim 5] The aforementioned imaging device further contains a substrate for mounting the aforementioned image sensor,
The aforementioned elastic member is combined with the aforementioned substrate via a coupling member,
An imaging device of a description in any 1 item of Claims 1-4 having a circle configuration to which the aforementioned coupling member laps in the center of the aforementioned imaging region in plane view over said 1st page.
[Claim 6] The aforementioned imaging device further contains a substrate for mounting the aforementioned image sensor,
The aforementioned elastic member is combined with the aforementioned substrate via a coupling member,
The imaging device according to claim 4 having the outline to which the aforementioned coupling member was along said side of the 1st page in plane view over said 1st page.
[Claim 7] An imaging device of a description in any 1 item of Claims 1-4, wherein the aforementioned elastic member is a substrate for mounting the aforementioned image sensor.
[Claim 8] An imaging device of a description in any 1 item of Claims 1-7, wherein the aforementioned elastic member is a piezoelectric device.
[Claim 9] An imaging device of a description in any 1 item of Claims 1-8, wherein thickness of a semiconductor layer at which a photoelectric conversion part of the aforementioned image sensor was arranged is 100 micrometers or less and distance of a semiconductor layer and the aforementioned elastic member at which a photoelectric conversion part of the aforementioned image sensor was arranged is 1000 micrometers or less.
[Claim 10] An imaging device of a description in any 1 item of Claims 1-9, wherein black resin is arranged between the aforementioned elastic member and the aforementioned image sensor.
[Claim 11] An imaging device of a description in any 1 item of Claims 1-10 to which the aforementioned image sensor and the aforementioned elastic member are characterized by having combined with each other in a region with which the aforementioned imaging region and the aforementioned elastic member lap at least among the aforementioned image sensors in plane view over said 1st page.
[Claim 12] An imaging device of a description in any 1 item of Claims 1-11 to which a product of Young’s modulus of the aforementioned image sensor and a cube of thickness is characterized by being smaller than a product of Young’s modulus of the aforementioned elastic member, and a cube of thickness.
[Claim 13] An imaging device of a description in any 1 item of Claims 1-12 to which a coefficient of linear expansion of the aforementioned image sensor and a coefficient of linear expansion of the aforementioned elastic member are characterized by a mutually equal thing.
[Claim 14] The aforementioned image sensor has a silicon layer,
An imaging device of a description in any 1 item of Claims 1-13, wherein coefficients of linear expansion of the aforementioned elastic member are 3.0 or more ppm/K and 4.0 ppm/K or less.

[via Egami]

Canon patent for curved sensor design (to suppress vignetting)

canon patent

Canon’s labs working on a curved sensor design? At least a new patent suggests it.

The patent refers to a curved sensor design with should suppress vignetting artefacts to a large degree.

  • Patent publication number 2016 – 197663
    • Release date 2016.11.24
    • Application date 2015.4.3
  • Canon patent
    • Make the central part flat in shape where light falloff is not noticeable
    • The surrounding portion where the drop in light quantity is conspicuous is defined as a curved shape

p

Excerpt from the patent literature:

[Claim(s)] [Claim 1] It has an imaging surface which carries out light reception of the light from an object imaged with a lens,
An image sensor, wherein the aforementioned imaging surface has a flat shape part and a curved shape section.
[Claim 2] The image sensor according to claim 1 having made a central part of the aforementioned imaging surface into a flat shape part, and making a periphery of the aforementioned imaging surface into the aforementioned curved shape section.
[Claim 3] The image sensor according to claim 2, wherein a position of a boundary between said flat shape part and the aforementioned curved shape section is set as the same distance to one reference point on the aforementioned imaging surface.
[Claim 4] The image sensor according to claim 3, wherein the aforementioned imaging surface has a picture element region where a unit pixel is arranged at matrix form.
[Claim 5] The image sensor according to claim 4 which is provided with the following and characterized by the aforementioned valid pixel area comprising said flat shape part and an aforementioned curved shape section.
A valid pixel area which outputs a signal [ picture element region / aforementioned ] according to light income.
A black reference picture element region which outputs a black reference signal.

[Claim 6] The image sensor according to claim 5, wherein the aforementioned reference point is placed at the center of the aforementioned valid pixel area.
[Claim 7] The aforementioned black reference picture element region adjoins the aforementioned valid pixel area, and is arranged, and, in the aforementioned black reference picture element region, the part or whole serves as a curved shape section, The image sensor according to claim 5 or 6, wherein curvature of a curved shape section of the aforementioned black reference picture element region differs from curvature of a curved shape section of the aforementioned valid pixel area.
[Claim 8] The image sensor according to claim 7, wherein curvature of a curved shape section of the aforementioned black reference picture element region is smaller than curvature of a curved shape section of the aforementioned valid pixel area.
[Claim 9] An image sensor of a description in any 1 item of Claims 5-8, wherein the aforementioned black reference picture element region comprises a shaded unit pixel provided with a photoelectric conversion part.
[Claim 10] An image sensor of a description in any 1 item of Claims 5-8, wherein the aforementioned black reference picture element region comprises a unit pixel without a photoelectric conversion part.
[Claim 11] An image sensor of a description in any 1 item of Claims 1-10,
The aforementioned lens,
An imaging device characterized by preparation ******.
[Claim 12] The imaging device according to claim 11, wherein the aforementioned reference point is placed on an optic axis of the aforementioned lens.

[via Egami]

Canon patent for 6-22mm f/1.4-1.8 lens for Powershot cameras with 1/1.7″ sensor

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Canon patent describing an optical formula for a 6-22 mm f/1.4-1.8 lens for a 1/1.7″ sensor equipped camera. 6-22mm is 28-100mm equivalent on full-frame sensors.

The Canon PowerShot G3 X and Powershot S110 are equipped with a 1/1.7″ sensor (as other Canon Powershots), so I guess this patent is possibly referring to a future Powershot model.

  • Patent publication number 2016 – 191753
    • Release date 2016.11.10
    • Application date 2015.3.31
  • Example 1
    • Zoom ratio 3.43
    • Focal length 6.15 20.03 21.08
    • F number 1.44 1.85 1.85
    • Viewing angle 37.08 13.06 12.43
    • Image height 4.65 4.65 4.65
    • Length Total length 74.93 77.34 76.67
    • BF 3.98 3.98 3.98

And the usual excerpt from the patent literature:

[Claim(s)] [Claim 1] In a zoom lens which performs variable power by having the 1st positive lens group and the 2nd negative lens group, having the 3rd positive lens group and a lens group of succession to the image side, and changing air spacing of each lens group from the object side,
setting air spacing of the aforementioned 1 lens group and said 2nd lens group to telephoto end — a wide angle end — largely
setting air spacing of said 2nd lens group and said 3rd lens group to a wide angle end — telephoto end — largely
Said 1st lens group consists of two lenses, one negative lens and positive lens,
Said 2nd lens group comprises five lenses containing three negative lenses and two positive lenses, and. Said 2nd lens group is 21 lenses more negative than the object side, 22 negative lenses, and 23 positive lenses. A zoom lens comprising a following lens, and said 22 negative lenses and 23 positive lenses comprising a cemented lens which has the plane of composition which turned a convex to the object side, and satisfying the following conditional expressions.
2.5 <f22/f2< 4.0
-7.0 <f23/f2< -3.0
25 <nu22-nu23< 55
f2: A focal distance of the 2nd lens group
f22: A focal distance of the 22nd lens
f23: A focal distance of the 23rd lens
nu 22: An Abbe number of the 22nd lens
nu 23: An Abbe number of the 23rd lens
[Claim 2] The zoom lens according to claim 1, wherein said 2nd negative lens group comprises five lenses, 21 lenses more negative than the object side, 22 negative lenses, 23 positive lenses, 24 negative lenses, and 25 positive lenses, and it satisfies the following conditional expressions.
9 <f1/ fw < 14
-2.5 <f2/fw< -1.0
f1: A focal distance of the 1st lens group
fw: A focal distance of a wide angle end
[Claim 3] The zoom lens according to claim 1 or 2 comprising an object side by the 1st positive lens group of the above, said 2nd negative lens group, the 3rd positive lens group of the above, the 4th negative lens group, and the 5th positive lens group.
[Claim 4] The zoom lens according to claim 1 or 2 which object sides being consisted of by the 1st positive lens group of the above, said 2nd negative lens group, the 3rd positive lens group of the above, the 4th negative lens group, the 5th negative lens group, and the 6th positive lens group.
[Claim 5] The zoom lens according to any one of claims 1 to 4, wherein the 1st positive lens group of the above comprises a cemented lens which joined the 11th lens more negative than the object side and the 12th positive lens.
[Claim 6] The 3rd positive lens group of the above is the 31st positive lens, the 32nd negative lens, and the 33rd positive lens. The zoom lens according to any one of claims 1 to 5 having composition which comprised the 34th negative lens and the 35th positive lens, joined said 32nd lens and the 33rd lens, and joined the 34th lens and the 35th lens, respectively.
[Claim 7] The zoom lens according to claim 3 or 4 constituting said 4th negative lens group from three sheets, the 41st positive lens, the 42nd negative lens, and the 43rd negative lens.
[Claim 8] An imaging device provided with the zoom lens according to any one of claims 1 to 7.

[Egami]