VIRTUAL IMAGE DISPLAY APPARATUS

摘要

A light guide member (10) includes three surfaces of a second surface (S12), a fourth surface (S14), and a fifth surface (S15) as two or more non-axisymmetric curved surfaces, and a projection lens (30) includes a lens surface (31a) as a non-axisymmetric aspheric surface. With this, on the light guide member side, even when there is a shape constraint that the first surface (S11) or the third surface (S13) which is a surface contributing to light guide is a flat surface, and correction of asymmetric aberration is limited, it becomes possible to perform sufficient aberration correction as the whole of an optical system including the projection lens. Therefore, the virtual image display apparatus can have a wide viewing angle and high performance, and can be made small and lightweight.

主权项

1. A virtual image display apparatus comprising:
a video element which generates video light; a light guide member which includes two or more non-axisymmetric curved surfaces and is a part of an optical system, an intermediate image being formed inside the light guide member; and a projection lens which makes video light from the video element enter the light guide member, wherein the projection lens includes at least one non-axisymmetric aspheric surface, a first surface and a third surface among a plurality of surfaces constituting the light guide member are arranged to face each other, and when an external scene is visually recognized through the first surface and the third surface, diopter substantially becomes 0, and video light from the video element is totally reflected by the third surface, is totally reflected by the first surface, is reflected by the second surface, is transmitted through the first surface, and reaches an observation side.