VIRTUAL IMAGE DISPLAY APPARATUS
First Claim
1. A virtual image display apparatus which causes an image light and an external light to be visually recognized simultaneously, comprising:
- an image element which generates an image light; and
a prism type image forming optical system including non-axisymmetric curved surfaces of three surfaces or more,wherein the prism type image forming optical system includes a relay optical system which forms an intermediate image on an optical path,wherein when the external light is visually recognized by passing the external light through a first surface and a third surface among a plurality of surfaces constituting the prism type image forming optical system, a diopter scale is approximately zero,wherein the first surface and the third surface form a concave surface shape with respect to an observation side, andwherein after the image light from the image element is totally reflected on the third surface, then totally reflected on the first surface and then reflected on the second surface, the image light is transmitted through the first surface to reach the observation side.
1 Assignment
0 Petitions
Accused Products
Abstract
An intermediate image is formed inside a first prism, and an image light, which is reflected on the order of a third surface, a first surface and a second surface, is transmitted through the first surface and reaches the eyes of the observer, therefore it is possible to make the entire optical system small and light in weight by making the first prism thin, and realize a high performance display device with a wide angle of view. Further, when an external light is passed through, for example, the first surface and the third surface and observed, a diopter scale is set to approximately zero, and thereby reducing the defocus or distortion of the external light when observed in a see-through manner. And, it is possible such that the shape of the first prism conforms to the face of the observer, the center is also close to the face.
-
Citations
16 Claims
-
1. A virtual image display apparatus which causes an image light and an external light to be visually recognized simultaneously, comprising:
-
an image element which generates an image light; and a prism type image forming optical system including non-axisymmetric curved surfaces of three surfaces or more, wherein the prism type image forming optical system includes a relay optical system which forms an intermediate image on an optical path, wherein when the external light is visually recognized by passing the external light through a first surface and a third surface among a plurality of surfaces constituting the prism type image forming optical system, a diopter scale is approximately zero, wherein the first surface and the third surface form a concave surface shape with respect to an observation side, and wherein after the image light from the image element is totally reflected on the third surface, then totally reflected on the first surface and then reflected on the second surface, the image light is transmitted through the first surface to reach the observation side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification