Propagation optical system, virtual image display apparatus, and head-mounted display
AssigneeRicoh Company, Ltd.
InventorYoshifumi Sudoh
Life of this patent
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Abstract
In a propagation optical system to propagate light from an image display element to a light guide element, the propagation optical system includes: a prism having a first surface having negative power to which light emitted from the image display element enters; and a lens group having positive power. The prism and the lens group are arranged between the image display element and the light guide element along an optical axis, and the prism is closer to the image display element than to the light guide element.
Claims10
A propagation optical system to propagate light from an image display element to a light guide element, the propagation optical system consisting of:
- a prism having a first surface having negative power to which light emitted from the image display element enters;
- and
- a lens group having positive power,
- wherein the prism and the lens group are arranged between the image display element and the light guide element along an optical axis, and the prism is closer to the image display element than to the light guide element such that the prism and the lens group having positive power are in this order from the image display element to the light guide element,
- wherein the lens group consists of, from a side of the image display element to a side of the light guide element:
- a first positive lens having positive power;
- a negative lens group consisting of one lens having negative power or two lenses each having negative power, the negative lens group having a negative power;
- and
- a second positive lens having positive power.
Dependencies are inferred from the claim text.