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US 2025/0155682 A1Published application
Optical system and image pickup apparatus
AssigneeCanon Kabushiki Kaisha
InventorMayu OHHORI
Life of this patent
Estimating the term…
Abstract
An optical system includes a plurality of lenses including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side to an image side, and an aperture stop disposed between the first lens and the second lens. Predetermined inequalities are satisfied.
Claims13
An optical system comprising:
- a plurality of lenses including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side to an image side;
- and
- an aperture stop disposed between the first lens and the second lens,
- wherein the following inequalities are satisfied:
- -
- 0
- .
- 5
-
- 9
- ≤
- S
-
- 23
- <
- 0
- .00
- 1.5
- ≤
- f
-
- 2
- /
- f
- ≤
- 3.
- where R2i is a radius of curvature of a surface on the image side of the second lens, R3o is a radius of curvature of a surface on the object side of the third lens, S23=(R2i+R3o)/(R2i−R3o), f is a focal length of the optical system, and f2 is a focal length of the second lens.
24 more elements
An image pickup apparatus comprising:
- an optical system;
- and
- an image sensor configured to image an object through the optical system,
- wherein the optical system includes:
- a plurality of lenses including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side to an image side;
- and
- an aperture stop disposed between the first lens and the second lens,
- wherein the following inequalities are satisfied:
- -
- 0
- .
- 5
-
- 9
- ≤
- S
-
- 23
- <
- 0
- .00
- 1.5
- ≤
- f
-
- 2
- /
- f
- ≤
- 3.
- where R2i is a radius of curvature of a surface on the image side of the second lens, R3o is a radius of curvature of a surface on the object side of the third lens, S23=(R2i+R3o)/(R2i−R3o), f is a focal length of the optical system, and f2 is a focal length of the second lens.
28 more elements
Dependencies are inferred from the claim text.