Optical system for airborne perspective helmet-mounted display

Abstract

An optical system for an airborne perspective helmet-mounted display belongs to the technical field of optics and aims to solve the problems of complicated structure, small field angle, short exit pupil distance and small exit pupil size in the prior art. The optical system comprises an image source, a relay lens block and a combiner, which are sequentially arranged along the optical axis; images produced by the image source pass through an optical wedge, a second biconvex lens, a first biconvex lens and a concave lens to be transmitted to the combiner and then reflected by the combiner to eyes of a pilot, the combiner simultaneously transmits external environmental images, and the pilot acquires the image information and the external environmental information. The optical system utilizes a free surface and binary optical elements to resolve conflicts between the demands on both field angle and the exit pupil distance and small-sized light weight, and enables the helmet-mounted display to be more compact in structure and lighter in weight, thereby reducing wearing fatigue of the pilot and improving the fighting efficiency.

Description

technical field [0001] The invention belongs to the field of optical technology, and in particular relates to an airborne see-through head-mounted display optical system. Background technique [0002] Helmet-Mounted Displays (HMDs) use an optical system to project image information from a microdisplay in front of people's eyes to form a magnified virtual image. For a see-through helmet display, the wearer can see the real world at the same time in addition to the screen on the display. have better environmental awareness. [0003] Typical traditional head-mounted displays often have the following disadvantages: the relay lens group is complex, the center of gravity is shifted greatly, and the exit pupil size is small. The U.S. patent with the publication number US3940204 discloses an invention named as the image information displayed by the optical system CRT image source to form an intermediate image through a relay lens group, then pass through a combiner, and finally be ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose an airborne see-through head-mounted display optical system to solve the existing problems of complex structure, small field of view, short exit pupil distance, and small exit pupil size.

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