Canon 50mm F1.5 and 32mm F0.75 Patents Found


Patents for a Canon 50mm F1.5 and Canon 32mm F0.75 lens were found

overview

  • [Publication number] P2025040503
  • [Release date] 2025-03-25
  • [Title of invention] Optical system and imaging device
  • [Application date] 2023-09-12
  • [Applicant]
    [Identification number] 000001007
    [Name or company name] Canon Inc.
  • A compact optical system and an imaging device having high optical performance over a wide focus range are provided.
  • [Background Art]
    [0002]
    In recent years, the importance of miniaturizing optical systems has increased due to the spread of smartphones and the shift from single-lens reflex cameras to mirrorless cameras in the high-end camera market. Patent Document 1 discloses a compact optical system (polarized reflective imaging system) equipped with a polarizing element and a half mirror.
  • [0004]
    The optical system disclosed in Patent Document 1 has a dark F-number of 2.85. Because the polarized reflective imaging system has a structure in which the amount of light when randomly polarized light is incident is 1/8, it is necessary to make the F-number brighter than that of a normal optical system. In addition, the optical system disclosed in Patent Document 1 does not have good aberrations when focusing and cannot increase the shooting magnification, so it is not possible to achieve high optical performance over a wide focus range.
  • SUMMARY OF THE PRESENT EMBODIMENTS [0005]
    It is therefore an object of the present invention to provide a compact optical system having high optical performance over a wide focus range.
  • EFFECT OF THE PRESENT DISCLOSURE
    According
    to the present invention, it is possible to provide a compact optical system having high optical performance over a wide focus range.


Example 1

  • Focal length: 48.00
  • F-number: 1.50
  • Half angle of view: 24.26
  • Image height: 21.64
  • Back focus: 0.10


Example 2

  • Focal length: 32.00
  • F-number: 0.75
  • Half angle of view: 24.37
  • Image height: 14.50
  • Back focus: 0.10


Example 3

  • Focal length: 32.00
  • F-number: 0.95
  • Half angle of view: 24.38
  • Image height: 14.50
  • Back focus: 0.10


Example 4

  • Focal length: 21.65
  • F-number: 0.95
  • Half angle of view: 33.81
  • Image height: 14.50
  • Back focus: 0.11


Example 7

  • Focal length: 17.38
  • F-number: 0.95
  • Half angle of view: 39.84
  • Image height: 14.50
  • Back focus: 0.10


Example 15

  • Focal length: 100.00
  • F-number: 2.00
  • Half angle of view: 7.70
  • Image height: 13.52
  • Back focus: 0.10


Example 24

  • Focal length: 35.50
  • F-number: 0.95
  • Half angle of view: 31.36
  • Image height: 21.64
  • Back focus: 0.10


Example 25

  • Focal length: 50.00
  • F-number: 0.95
  • Half angle of view: 23.40
  • Image height: 21.64
  • Back focus: 0.10

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