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Canon to use Double Sensor to Maximize Image Quality - Patent

Canon patent shows they are planning to add two sensors in once camera. And, its not a mirrorless they will keep the mirror inside the camera to reflect some portion of light to secondary sensor. The main intention of the entire setup to maximize the image quality.

Canon Patent Double Sensor in a camera

The half mirror 103 splits the imaging light beam (subject light beam) that has passed through the imaging optical system 102 into a first light beam and a second light beam. The first image sensor 104 and the second image sensor 105 receive the first light beam and the second light beam, respectively. The first image sensor 104 and the second image sensor 105 are constituted by a CCD image sensor, a CMOS image sensor, or the like. The first image sensor 104 and the second image sensor 105 have an image pickup pixel and a focus detection pixel for autofocus using a phase difference detection method. The MPU 106 includes a CPU and a memory that stores a program executed by the CPU, and functions as a control unit that controls the overall operation of the camera body 101. Further, the MPU 106 controls the driving of the photographing lens 102b via the lens driving motor 108.

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Canon upcoming cameras Canon 1DX Mark III | Canon EOS R PRO | Canon EOS Ra

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Canon Working on Ultimate Portrait Zoom Lens

Canon is working on 50-80mm lens for FF Mirrorless camera while having a constant F1.1 aperture throughout the zoom range. The patent was published on Aug 8 2019, so roughly after 2 years from now we can expect Canon RF 50-80mm F1.1 STM Lens in the stores.

Canon RF 50-80mm f/1.1:

  • Focal length: 51.50mm 64.17mm 82.52mm
  • F-number: 1.13 1.13 1.13
  • Half angle of view: 22.79° – 18.63° – 14.69°
  • Total lens length 220.20mm 225.05mm 224.20mm
  • BF 6.51mm 6.53mm 8.64mm

We will update you soon as we get any new information. See more Canon patents

also see – Canon Eye Controlled AF Coming for Mirrorless

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Canon Eye Controlled AF Coming for Mirrorless

According to a latest patent Canon is working on a eye-controlled autofocus for their upcoming Mirrorless camera. The EOS-3 was the first Canon camera to introduce eye-controlled autofocus back on November 1998.

How Eye Controlled AF Work

The camera features  a infrared transmitter and receiver mounted around the eyepiece monitored the position of the iris, thus “knowing” where the photographer was looking and focusing on that point. At that time the system was having some system limitations however, notably eyeglasses and occasionally contact lenses would confuse the system.

New Eye AF Patent for Mirrorless Camera

Patent Details Machine translated

In addition, a display element 10 composed of a liquid crystal or the like for displaying a captured image, a display element driving circuit 11 for driving the display element 10, and an eyepiece 12 for observing a subject image displayed on the display element 10 are provided. Has been placed.   Reference numerals  13a to 13b denote light sources for illuminating the photographer’s eyeball 14 for detecting the direction of the line of sight from the relationship between the elephant and the pupil reflected by the cornea reflection of the light source conventionally used in a single-lens reflex camera or the like. The infrared light emitting diode is disposed around the eyepiece 12. The illuminated eyeball image and the image by corneal reflection of the light sources 13a to 13b are transmitted through the eyepiece lens 12, reflected by the light splitter 15, and the eyeball lens in which the photoelectric element array of the CCD ridge is arranged two-dimensionally by the light receiving lens 16. An image is formed on the image sensor 17. The light receiving lens 16 positions the pupil of the photographer’s eyeball 14 and the image sensor 17 for the eyeball in a conjugate imaging relationship. The line-of-sight direction is detected by a predetermined algorithm, which will be described later, from the positional relationship between the eyeball imaged on the eyeball image sensor 17 and the corneal reflection of the light sources 13a to 13b. 

So, Canon will be implementing Eye AF in their pro mirrorless camera in 2021-2022. In general once a patent gets registered it takes 2 to 3 years to become a real product.

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Canon RF 400mm F2.8, 500mm F4 and 600mm F4 Lens Patents

Canon is working to introduce a new range of super-telephoto photo lenses for their Fullframe Mirrorless Camera. We all know that existing Canon EF lenses are highly compatible the new range of Mirrorless cameras. But as we all know RF lenses are more superior (see video below) than EF lenses so they have to bring out new lenses for professionals as soon as possible

Focal length: 392mm
FNo.: 2.90
2ω: 3.16
Image height: 21.64 mm
Lens length: 360.03 mm
Back focus: 31.01 mm

Focal length: 490mm
FNo.: 4.12
2ω: 2.54
Image height: 21.64 mm
Lens length: 412.08 mm
Back focus: 33.39 mm

Focal length: 588mm
FNo.: 4.12
2ω: 2.11
Image height: 21.64 mm
Lens length: 476.08 mm
Back focus: 33.21 mm

See more Canon patents here

Canon RF Lenses are Better than Canon EF Lenses

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Canon to Implement Anti-Flickering Tech For Video in DSLR and Mirrorless

Sometimes we do see flicker on camera screen as shown below, In some way it effects the Video as well as still image quality of the Camera. Flickering happens when the refresh rate of LED lights are lower compared to your camera shutter speed. So, Canon will be soon implementing flicker detection algorithm for Still and Video. It will automatically fix whenever flickers are detected by the camera.

Canon Patent – Application Timeline

2018-05-30 Application filed by Canon Inc
2018-05-30 Priority to xxxxxxxxxxxx
2018-08-23 Publication of JPxxxxxxxxxxx
2019-04-24 Application granted
2019-04-24 Publication of JPxxxxxxx
2019-06-13 Application status is Active
2034-07-02 Anticipated expiration

Take a look at the short description

Translated Details from Patent
Image sensor 103 is used when performing flicker detection for video, metering sensor 108 is used when performing a flicker detection still image. That is, the sensor used for flicker detection between a moving image and still image are different.

We will update you soon as we get any new information

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Canon Working AF Phase and Contrast AF Calibration, Hybrid Viewfinders

Canon Working Hybrid Viewfinder and advance AF systems,  the screen shot of new Hybrid Viewfinder is on your screen, That will display additional information while getting AF done. Canon is also working to enhance the Phase and Contrast based AF system collaboration. Both will all together when you are using viewfinder of the DSLR. These patents are published in Japanese language so its bit hard to get everything from it.

Canon working on new Hybrid AF Module that will help upcoming Pro DSLRs to calibrate Phase + Contrast AF all-together to give improved AF performance while working in Viewfinder mode.

Also see – Canon Patent: More Improved Touch Display Screen

Canon Working AF Phase and Contrast AF Calibration Patent Details

Application JP2018088400A events – 2018-05-01
Application filed by キヤノン株式会社, Canon Inc – 2018-05-01
Priority to JP2018088400A – 2018-09-13
Publication of JP2018142007A – 2019-02-26
Application status is Pending

Patent details: To enable focus calibration for focus detection based on phase difference detection to be achieved simply and efficiently for even a general subject without using a dedicated chart.SOLUTION: The present invention comprises: an imaging unit for photoelectrically converting a subject image formed by a photographic optical system and generating an image signal; a phase difference detection unit for detecting, on the basis of a pair of image signals of the subject image, a first in-focus position of a focus lens included in the photographic optical system by means of phase difference detection; a contrast detection unit for detecting a second in-focus position of the focus lens by means of contrast detection using the image signal; a calibration unit for correcting the first in-focus position using a correction amount calculated from a difference between the second in-focus position and the first in-focus position; and a subject determination unit for determining whether or not the subject image is suitable for detection of the in-focus position by the phase difference detection unit or the contrast detection unit before or during the calibration performed by the calibration unit.

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Canon Patent: More Improved Touch Display Screen

Canon working to improve user experience by improving the touch display interface of the camera. This patent talks about improving user experience while reviewing the image. Patent document describes the camera will maintain the same zoom ratio even when slide to another image and lot’s of other improvement.

We think these are minor updates and can be implemented to existing touch display screens via a simple firmware update too. See more Canon Patent

Google translate

In the digital camera equipped with recent touch panel, changes the magnification, but the movement of the expansion position can be performed by touch operation, no means for switching to another image while maintaining the expanded position, efficiently focus confirmation was not performed.
In view of the problems described above, and an object thereof to be able to switch smoothly while maintaining the expanded position by the touch operation to the other images.

The display control device of the present invention includes: a touch detection means for detecting a touch operation on the display unit, a larger display means an enlarged display partial range of the image displayed on the display area of ​​said display means, said display means when the first image is enlarged and displayed, the touch of only one point, that the touch position of the one point only before the predetermined time elapses since the touch of the only one point has moved Correspondingly, changes the display range of the first image, when the first image on the display unit is enlarged and displayed, the touch of only one point, since the touch of the one point only the touch position after the elapse of the predetermined time the point only in response to the movement, the enlarged image switching display of the display unit, the enlarged display of the second image from the enlarged display of the first image and control means for controlling to perform the feed Characterized in that it.

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