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US 9,285,514 B2Granted
Image display apparatus having a prism optical system including a plurality of rotationally asymmetric surfaces
AssigneeOlympus Corporation
InventorKoichi Takahashi
Life of this patent
Estimating the term…
Abstract
A prism optical system including at least four optical surfaces, each having optical functions. At least two of the four optical surfaces are each a rotationally asymmetric surface, and one of two surfaces on which light is incident or from which light exits out is capable of one transmission and two internal reflections.
Claims15
An image display apparatus, comprising:
- an image display device, and
- a prism optical system that receives light from the image display device and emits the light toward a viewer's eye, wherein:
- the prism optical system comprising at least four optical surfaces, wherein:
- one of the four optical surfaces is an entrance and transmission surface,
- at least two of the four optical surfaces are rotationally asymmetric surfaces,
- one of the rotationally asymmetric surfaces being an exit surface and capable of one transmission and two internal reflections, and
- the other being an internal reflection surface,
- the entrance and transmission surface is an optical surface different from the exit surface and other reflection area,
- the image display device is located in opposition to the entrance and transmission surface of the prism optical system, and
- an area having internal reflection in the exit surface is in a convex shape on an internal side of the prism optical system and in a concave shape on a viewer side in a plane including a center chief ray.
7 more elements
An image display apparatus, comprising:
- an image display device, and
- a prism optical system that receives light from the image display device and emits the light toward a viewer's eye, wherein:
- the prism optical system comprising at least five optical surfaces, wherein:
- one of the four optical surfaces is an entrance and transmission surface,
- at least two of the five optical surfaces are rotationally asymmetric surfaces,
- one of the rotationally asymmetric surfaces being an exit surface and capable of one transmission and two internal reflections, and
- the other being an internal reflection surface,
- the entrance and transmission surface is an optical surface different from the exit surface and other reflection area,
- the image display device is located in opposition to the entrance and transmission surface of the prism optical system, and
- an area having internal reflection in the exit surface is in a convex shape on an internal side of the prism optical system and in a concave shape on a viewer side in a plane including a center chief ray.
7 more elements
Dependencies are inferred from the claim text.