Optical system and display apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYu MIYAJIMA, Yoshihisa TASHIRO
Life of this patent
Estimating the term…
Abstract
An optical system may be configured to guide a light beam from a display surface to a pupil plane, and may include, in order from a pupil plane side to a display surface side, a first lens unit, a first transmissive reflective member having a first transmissive reflective surface, a second lens unit, a second transmissive reflective member having a second transmissive reflective surface, and a third lens unit. At least one optical surface of the first lens unit that forms an interface with air may be a first aspheric surface. At least one optical surface of the third lens unit that forms an interface with air may be a second aspheric surface.
Claims19
An optical system configured to guide a light beam from a display surface to a pupil plane, the optical system comprising, in order from a pupil plane side to a display surface side:
- a first lens unit;
- a first transmissive reflective member having a first transmissive reflective surface;
- a second lens unit;
- a second transmissive reflective member having a second transmissive reflective surface;
- and
- a third lens unit,
- wherein at least one optical surface of the first lens unit that forms an interface with air is a first aspheric surface, and
- wherein at least one optical surface of the third lens unit that forms an interface with air is a second aspheric surface.
A display apparatus comprising:
- an optical system configured to guide a light beam from a display surface to a pupil plane;
- and
- a display element,
- wherein the optical system includes, in order from a pupil plane side to a display surface side, a first lens unit, a first transmissive reflective member having a first transmissive reflective surface, a second lens unit, a second transmissive reflective member having a second transmissive reflective surface, and a third lens unit,
- wherein at least one optical surface of the first lens unit that forms an interface with air is a first aspheric surface, and
- wherein at least one optical surface of the third lens unit that forms an interface with air is a second aspheric surface.
Dependencies are inferred from the claim text.