An Augmented Reality Optical System with Large Exit Pupil and Large Field of View

Abstract

The invention discloses a large-exit-pupil large-visual-field augmented reality system comprising a prism with three optical working surfaces, a semitransparent mirror and an image displayer. The three optical working surfaces of the prism are a first optical working surface, a second optical working surface and a third optical working surface respectively. Light rays emitted by the image displayer are incident to the prism in a transmission way through the first optical working surface and then reflected by the third optical working surface and then reflected by the second optical working surface and then incident to the third optical working surface in the transmission way and finally reflected into the human eyes through the semitransparent mirror. The light rays, which are away from the side of the human eyes, of the semitransparent mirror are incident into the human eyes in the transmission way through the semitransparent mirror. The large-exit-pupil large-visual-field augmented reality optical system has the advantages of being compact in structure, large in exit pupil distance, large in visual field, large in range of eye movement, great in whole-visual-field aberration correction and high utilization rate of optical energy.

Description

technical field [0001] The invention relates to the field of augmented reality, in particular to an augmented reality optical system with a large exit pupil and a large field of view. Background technique [0002] In recent years, augmented reality (Augmented Reality, referred to as AR) display devices have developed rapidly. Since the system is a head-mounted system, it must be compact and lightweight to enhance user comfort. For an augmented reality display device, a large field of view is very important. The large field of view can increase the user's sense of immersion and enable the observer to observe high-quality dynamic images to the greatest extent. The large exit pupil distance can enable the observer to wear other visual systems (such as myopia glasses) for use, increasing the scope of application of the system to the wearer. However, structural parameters such as the field of view, exit pupil distance, large exit pupil diameter, and short focal length of the opt...

AI Technical Summary

Problems solved by technology

However, structural parameters such as the field of view, exit pupil distance, large exit pupil diameter, and short focal length of the optical system are mutually restricted, and there are considerable difficulties in satisfying the above conditions at the same time.

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