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]
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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

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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

6-22mm
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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]

Canon patent for 400mm f/2.8L IS lens with built-in extender

canon patent

Canon’s labs are working without interruption. Here we have a Canon patent for a 400mm f/2.8L IS lens with built-in extender.

  • Patent publication number 2016-191761
    • Release date 2016.11.10
    • Application date 2015.3.31
  • Main lens
    • Focal distance 392.57
    • F number 2.90
    • Field of View 3.15
    • Image height 21.64
    • Lens total length 371.15
    • BF 44.00
  • Example 1
    • First state magnification 1.40
    • Second state magnification 1.70

Excerpt from the patent literature:

[Claim(s)] [Claim 1] In a rear converter lens expandable to a long focal length by equipping the image surface side of a main lens,
Magnification can be changed by switching some or all of the rear converter lens,
Magnification of the n-th state of a rear converter lens from an installing surface which guarantees mechanically a relative position on an optic axis of beta_n, a rear converter lens, and a main lens, When average value of Sk_n and Sk_n of each state is made into Sk_ave for distance to a paraxial image surface position of the n-th state when a main lens is equipped with a rear converter lens
| (Sk_n-Sk_ave) x beta_n | < 0.10
A satisfied rear converter lens.
[Claim 2] When a focal distance of a rear converter lens of f_max and a minimum magnification state is made into f_min for a focal distance of a rear converter lens of a maximum magnification state of the aforementioned rear converter lens
1.5 < |f_min/f_max| < 10.0
The satisfied rear converter lens according to claim 1.
[Claim 3] When a forward side principal point position of ho_max and a minimum magnification state is made into ho_min for a forward side principal point position of a maximum magnification state of the aforementioned rear converter lens
0.05 (ho_max -ho_min) < /root(f_max^2+f_min^2) < 0.28
The satisfied rear converter lens according to claim 1.
[Claim 4] The rear converter lens according to claim 1 in which the aforementioned rear converter lens is characterized by some or all of a rear converter lens changing to optical axis direction and vertical direction at the time of magnification change.
[Claim 5] The rear converter lens according to claim 1, wherein the aforementioned rear converter lens has the 1st lens group Lfix of fixing at the time of magnification change in order, and the 2nd switchable lens group Lex from the object side.
[Claim 6] When a focal distance of a change group of fex_max and a minimum magnification state is made into fex_min for a focal distance of a change group of a maximum magnification state of the aforementioned rear converter lens
1.1 < |fex_min/fex_max| < 5.0
The satisfied rear converter lens according to claim 5.
[Claim 7] A focal distance of the n-th lens of a change group of a maximum magnification state of the aforementioned rear converter lens, a refractive index of d line, and magnification, respectively f_max_n, When a focal distance of the n-th lens of a change group of nd_max_n, betamax, and a minimum magnification state, a refractive index of d line, and magnification are set to f_min_n, nd_min_n, and betamin, respectively
-(sigma(1/(nd_min_nxf_min_n))/ sigma(1/(nd_max_nxf_max_n))-1) 0.7 < *(beta min/beta max) < 0.7
The satisfied rear converter lens according to claim 5.
[Claim 8] A focal distance of the n-th lens of a change group of a maximum magnification state of the aforementioned rear converter lens, an Abbe number of d line, and magnification, respectively f_max_n, When a focal distance of the n-th lens of a change group of vd_max_n, betamax, and a minimum magnification state, an Abbe number of d line, and magnification are set to f_min_n, vd_min_n, and betamin, respectively
-(sigma(1/(vd_min_nxf_min_n))/ sigma(1/(vd_max_nxf_max_n))-1) 0.7 < * (beta min/beta max) < 0.7
The satisfied rear converter lens according to claim 5.
[Claim 9] From an installing surface guaranteed mechanically, a relative position on an optic axis of the aforementioned rear converter lens and a main lens, Most average value of Dex_n of each state when distance to a point on an optic axis of a surface on the object side is made into Dex_n of the n-th status-switching group of the aforementioned rear converter lens Dex_ave, When average value of Sk_n of each state when distance from an installing surface which guarantees mechanically a relative position on an optic axis of the aforementioned rear converter lens and a main lens to a paraxial image surface position of the n-th state when a main lens is equipped with a rear converter lens is made into Sk_n is made into Sk_ave
0.08 < Dex_ave/Sk_ave < 0.40
The satisfied rear converter lens according to claim 4 or 5.
[Claim 10] From an installing surface guaranteed mechanically, a relative position on an optic axis of the aforementioned rear converter lens and a main lens, Most distance of a fixing group of the aforementioned rear converter lens which it is to a point on an optic axis of a surface on the object side Dfix, When average value of Sk_n of each state when distance from an installing surface which guarantees mechanically a relative position on an optic axis of the aforementioned rear converter lens and a main lens to a paraxial image surface position of the n-th state when a main lens is equipped with a rear converter lens is made into Sk_n is made into Sk_ave
-0.20 < Dfix/Sk_ave < 0.00
The satisfied rear converter lens according to claim 4 or 5.
[Claim 11] The rear converter lens according to claim 5, wherein the aforementioned rear converter lens has an aspheric surface in the 1st lens group of fixing to the time of magnification change.

canon patent

[via Egami]