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US 2026/0259398 A1Published application
Imaging optical system and image pickup apparatus
AssigneeCanon Kabushiki Kaisha
InventorYuma KOBAYASHI
Life of this patent
Estimating the term…
Abstract
An imaging optical system includes at least one positive lens, at least one negative lens, a first transmissive reflective surface, and a second transmissive reflective surface disposed closer to an image plane than the first transmissive reflective surface.
Claims17
An imaging optical system comprising:
- at least one positive lens;
- at least one negative lens;
- a first transmissive reflective surface;
- and
- a second transmissive reflective surface disposed closer to an image plane than the first transmissive reflective surface,
- wherein the following inequality is satisfied:
- 3
-
- Rt
- -
- 6
- ≤
- θ
- ≤
- 30
-
- Rt
- +
- 2
-
- 0
- where Rt is a telephoto ratio of the imaging optical system, and θ [°] is a half field angle of the imaging optical system.
19 more elements
An imaging optical system comprising:
- at least one positive lens;
- at least one negative lens;
- a first transmissive reflective surface;
- and
- a second transmissive reflective surface disposed closer to an image plane than the first transmissive reflective surface.
2 more elements
An image pickup apparatus comprising:
- an imaging optical system;
- and
- an image sensor configured to capture an object through the imaging optical system,
- wherein the imaging optical system includes:
- at least one positive lens;
- at least one negative lens;
- a first transmissive reflective surface;
- and
- a second transmissive reflective surface disposed closer to an image plane than the first transmissive reflective surface,
- wherein the following inequality is satisfied:
- 3
-
- Rt
- -
- 6
- ≤
- θ
- ≤
- 30
-
- Rt
- +
- 2
-
- 0
- where Rt is a telephoto ratio of the imaging optical system, and θ [°] is a half field angle of the imaging optical system.
23 more elements
Dependencies are inferred from the claim text.