Canon Patent: Tilt-shift Lens With Internal Moving Elements

Canon Patent

A new Canon patent application for tilt-shift lenses with moving internal parts. Thanks Fred for the tip.

Canon patent application 20220155653 (USA) discusses optical formulas and methods for a tilt-shift lens with internal moving parts.

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

Canon Patent: Electronic Control For Tilt-Shift Lenses

Tilt-shift

A new Canon patent: electronic control for tilt-shift lenses.

Canon patent application 2022067506 (Japan) discusses how to implement electronic controls on tilt-shift lenses.

PROBLEM TO BE SOLVED: To enable a user to intuitively and quickly perform an operation for tilting shooting.

By tilting or shifting a lens with respect to an image pickup surface, it is possible to obtain a tilting effect such as tilting a subject surface in focus with respect to the image pickup surface. Patent Document 1 has two operating rings on the outer periphery of the lens barrel, and the orientation (rotation position) of the tilt axis of the lens in the lens barrel around the optical axis can be changed by rotating the first operating ring. Disclosed is a lens device capable of changing the tilt direction around the tilt axis of a lens by rotating the second operating ring.

However, in the lens device disclosed in Patent Document 1, since the rotation operation direction of the second operation ring does not match the tilt direction of the actual lens, the user intuitively operates the second operation ring. May not be possible.

Moreover, since the orientation of the tilt axis changes due to the rotation of the first operating ring, the user confirms the orientation by visually observing the first operating ring before operating the second operating ring. Need to keep. Further, when adjusting the direction of the tilt axis to tilt the lens, the user needs to move his / her hand from the first operation ring to the second operation ring. For these reasons, it is difficult for the user to operate quickly.

The present invention provides a lens device that allows a user to intuitively and quickly perform an operation for tilting photography.

The drive unit 41 is fixed at a position on the outer periphery of the guide cylinder 31 at a position orthogonal to the tilt axis β from the optical axis α. The drive unit 41 is a motor (actuator) having a lead screw 411 that rotates around an axis parallel to the optical axis α, and generates a driving force that tilts the holding frame 22. The guide cylinder 31 is held by the fixed cylinder 51 so as to be rotatable around the optical axis α by bayonet coupling.

tilt-shift

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

[via asobinet]

Canon Patent: 200mm f/2, 300mm f/2.8 And 500mm f/4 (RF mount?)

Canon Patent

Canon patent application for some telephoto zooms, for the EOS R system I guess.

Canon patent application 2020196094 (Japan) discusses optical formulas for three telephoto zoom lenses:

  • 200mm f/2
  • 300mm f/2.8
  • 500mm f/4

As a shooting optical system having a long focal length, a so-called telephoto type shooting optical system is known. The telephoto type photographic optical system is used, for example, in a single focus super-telephoto lens.

In the photographing optical system described in Patent Document 1, the second lens group having a negative refractive power is moved during focusing. Here, the second lens group is arranged at a position relatively close to the first lens group, and it cannot be said that the focus group can be sufficiently reduced in size and weight.

An object of the present invention is to provide an optical system that is lightweight and has chromatic aberration and other aberrations satisfactorily corrected, and an image pickup apparatus having the same.

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

[via Digicame Info]

Canon Patent: RF 9-18mm f/4 Wide Angle Zoom For EOS R System

Canon Patent

Here is a new Canon patent application, and it is a rather interesting one.

Canon patent application P2022065383 (Japan) discusses optical formulas for a RF 9-18mm f/4 wide angle zoom lens for the Canon EOS R system.

PROBLEM TO BE SOLVED: To provide a zoom lens which is compact and has high resolving power while having a wide angle of view.

With the increase in the number of pixels of an image pickup apparatus, there is a demand for a zoom lens having a wide angle and high optical performance. Patent Document 1 discloses a wide-angle zoom lens having a focal length at a wide-angle end of about 11 mm in terms of 35 mm and an angle of view of about 120 °.

However, when the zoom lens is widened, the refractive power of each lens constituting the zoom lens increases and the resolution decreases.

The present invention provides a zoom lens having a wide angle of view, yet being compact and having high resolving power.

Example 1

  • Focal length: 9.27-17.46
  • F value: 4.12
  • Half angle of view: 66.80-51.10
  • Image height: 21.64
  • Overall length: 130.07-127.77
  • Back focus: 11.00

The Canon patent was spotted by Asobinet. More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

Canon Patent: RF 16-28mm f/2.8, RF 15-28mm f/2.8-4 and RF 15-28mm f/4-5.6 IS

Canon Patent

A new Canon patent, once again for RF mount lenses. Some interesting lenses, we might add.

Canon patent application 2022063727 (Japan) discusses optical formulas for three RF mount lenses:

  • RF 16-28mm f/2.8
  • RF 15-28mm f/2.8-4
  • RF 15-28mm f/4-5.6 IS

PROBLEM TO BE SOLVED: To provide a zoom lens having a wide angle of view, easy to manufacture, and having little aberration fluctuation due to scaling.

In the zoom lenses disclosed in Patent Documents 1 and 2, in order to satisfactorily correct distortion and curvature of field, aspherical lenses having a large uneven thickness and a large diameter are added to the first lens group and the second lens group. Is used. As a result, it is difficult to manufacture a zoom lens.

The present invention provides a zoom lens capable of satisfactorily correcting distortion and curvature of field while having a wide angle of view and being easy to manufacture.

Example 1

  • Focal length: 16.45-27.50
  • F value: 2.88
  • Half angle of view: 52.71-38.49
  • Image height: 19.00-21.64
  • Overall length: 134.57-119.35
  • Back focus: 14.07

Example 2

  • Focal length: 15.40-27.50
  • F value: 2.88-4.04
  • Half angle of view: 54.50-38.66
  • Image height: 19.00-21.64
  • Overall length: 114.50-110.87
  • Back focus: 14.15

Example 3

  • Focal length: 15.40-27.50
  • F value: 4.00-5.60
  • Half angle of view: 54.51-38.94
  • Image height: 19.00-21.64
  • Overall length: 103.50-103.50
  • Back focus: 14.20

The Canon patent was spotted by Asobinet. More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

Industry News: Fujifilm Files Patent For Active Sensor Cooling System For Cameras With IBIS

Fujifilm

Interesting patent application by Fujifilm: active sensor cooling for cameras with IBIS (In Body Image Stabilisation).

Fujifilm patent application 2022-55674 (Japan) discusses methods and technology to actively cool down an imaging sensor with IBIS.

PROBLEM TO BE SOLVED: To provide an imaging device and an imaging method including an imaging unit.

Conventionally, in an image pickup apparatus provided with a camera shake correction mechanism, a technique for cooling an image pickup element has been proposed.

In recent years, an image pickup device may be used to shoot a high-quality moving image for a long time. The image pickup device is preferably used in an appropriate temperature range. Shooting high-quality moving images consumes a lot of power, and the heat generated from the image pickup device itself exceeds the appropriate temperature range. In high-quality video shooting for a long time, the image pickup device activates a protection function such as forcibly terminating the shooting when the temperature exceeds an appropriate temperature range for the protection of the device itself and the safety of the photographer. Therefore, it may not be possible to secure a sufficient shooting time when shooting a high-quality moving image. Further, in the case of repeated shooting, if there is no time interval in which the temperature of the image pickup device, which has risen during the previous use, falls to an appropriate range, it is not possible to secure a sufficient shooting time. Further, in an image pickup device with a camera shake correction function, since the heat-generating image pickup element is always floating at the time of shooting, it is structurally difficult to dissipate the heat generated from the image pickup element.

The image pickup unit 100 includes three heat pipes 180A to 180C. The heat pipes 180A to 180C are heat transporters that transport heat. The ends of the heat pipes 180A to 180C are installed on the sheet metal 108C of the cooling device 108. Further, the other end of the heat pipes 180A to 180C is installed in the heat sink 110. As a result, the heat generated by the cooling device 108 is transported by the heat pipes 180A to 180C, and can be cooled by the forced cooling mechanism 46 at the transportation destination.

As described above, the heat generated from the cooling device 108 can be transported by using the heat pipes 180A to 180C, and the cooling can be performed by the forced cooling mechanism 46 at the transportation destination. As a result, it is not always necessary to equip the sheet metal 108C of the cooling device 108 with the forced cooling device, and the space inside the image pickup device main body 2 of the image pickup device 10 can be effectively used.

The Fujifilm patent application was spotted by Asobinet. Canon patents are listed here.