Decentration optical system, and image display apparatus and imaging apparatus incorporating the same

Abstract

The invention provides a decentration optical system comprising at least five optical surfaces. The optical surfaces are each decentered with respect to an axial chief ray in the Y-Z plane in the XYZ coordinate space, and at least one surface is decentered in the X-Z plane orthogonal to the Y-Z plane. At least two of the multiple optical surfaces are rotationally asymmetric surfaces, and at least one of the at least two rotationally asymmetric surfaces is a rotationally asymmetric surface having an X odd-numbered degree term.

Description

technical field [0001] The present invention relates to an optical device such as a decentered optical system using a rotationally asymmetric plane, an image display device using the decentered optical system, and an imaging device. Background technique [0002] Conventionally, an optical system using a prism having a plurality of optical surfaces as an observation image display element is known. In such a prism, the light emitted from the display element enters the prism, is reflected inside the prism, exits the prism, and reaches the observer's eyeball, whereby the image can be observed as a magnified virtual image. [0003] As an optical system for observing such an image, Patent Document 1 proposes an optical system based on a prism that forms a primary image via at least three reflecting surfaces and projects it to the eyeball, and Patent Documents 2 and 3 propose a hologram element arrangement. In the optical system of the eyeglass lens part, etc. [0004] In additio...

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Problems solved by technology

Furthermore, assembly and adjustment are labor-intensive, and there are problems with the durability of the device, such as water resistance.

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