Large visual field angle reality enhancement display prism and optical system

Abstract

The invention discloses a large visual field angle reality enhancement display prism and an optical system. The large visual field angle reality enhancement display prism has three optical working surfaces which are a first optical working surface which is plane, a second optical working surface which is an aspheric surface or a free-form surface and a third optical working surface which is in parallel with the first optical working surface; the third optical working surface has a microstructure and is plated with a translucent and half-reflecting film; light rays of an image representing virtual information are transmitted into a display prism and then arrive to a first optical working surface after being reflected by the second optical working surface and meet a full reflection condition; light rays of full reflection are transmitted to the third optical working surface having the microstructure and are transmitted into human eyes from the first optical working surface after reflection; and external environment light rays are transmitted into the display prism from the third optical working surface and are transmitted to the human eyes through the first optics working surface. The large visual field angle reality enhancement display prism and the optical system have simple structure prisms, can increase the visual field angle of the optical system and do not need to add a compensating prism.

Description

technical field [0001] The invention relates to the field of augmented reality display technology, in particular to a display prism and an optical system for augmented reality with a large viewing angle. Background technique [0002] Augmented reality technology (AR) is a display technology that superimposes virtual information on the real world, and can be widely used in military, medical, education, manufacturing, entertainment and other fields. With the advent of the first year of augmented reality, augmented reality glasses are becoming more and more familiar to the public, and products are gradually spreading to the consumer market. [0003] As a head-mounted system, considering the wearer's comfort and other issues, it is necessary to restrict the size and weight of its structure, which also limits the optical parameters such as the field of view and exit pupil of this type of eyepiece system. The augmented reality glasses currently on the market have problems such as...

AI Technical Summary

Problems solved by technology

The diagonal field of view of the free-form surface prism can reach 50 degrees, and the exit pupil diameter is 8mm; but in order not to tilt and deform when viewing the external scene, a compensating prism needs to be glued together to compensate for the offset and tilt of the light, which increases the processing technology the complexity of

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