Optical system of holographic optical waveguide helmet-mounted display

Abstract

The invention provides an optical system of a holographic optical waveguide helmet display. The optical system comprises a relay collimation optical system, a holographic optical waveguide assembly and a display image source, wherein light rays of the display image source are collimated through the relay collimation optical system and coupled into the holographic optical waveguide assembly; when light waves are transmitted through the holographic optical waveguide assembly, the light waves are partially diffracted to form holographic optical waveguides; and meanwhile, light rays of external scenes pass through the holographic optical waveguide assembly, so that a user can see that the images of the coupled holographic optical waveguides are superposed on the external scenes in a projection way. The optical system has the advantages as follows: the holographic and waveguide technologies are combined, so that the problem of off-axis transmission of a light path is effectively solved, the system imaging quality is guaranteed, the clear imaging requirement is met, the distortion is small, the system weight and volume are reduced, the comprehensive system performance is improved, and the problem of high difficulty in the conventional optical design and manufacture is solved.

Description

technical field [0001] The invention relates to an optical system, in particular to a helmet mounted display optical system. Background technique [0002] As an important photoelectric display device, the helmet-mounted display plays a key role in providing key measurement and control information for aircraft or tank drivers, individual soldiers, astronauts, etc., and improving situational awareness. Under the premise of satisfying the function and reliability, the head-mounted display constantly puts forward new requirements for its weight and structural form. Reducing the weight can reduce the load on the wearer, and a good structural form can ensure the position of the center of mass of the head, thereby delaying the wearer's Fatigue level, prevent neck sprains caused by impact, etc. [0003] In order to adapt to the installation of the helmet and ensure a good display function, the traditional helmet-mounted display optical system requires tighter curvature tolerances f...

AI Technical Summary

Problems solved by technology

[0003] In order to adapt to the installation of the helmet and ensure a good display function, the traditional helmet-mounted display optical system requires tighter curvature tolerances for the goggles. The lenses of the relay lens group need to be off-axis and tilted, which makes the assembly tolerance of the relay mirror tight, resulting in optical distortion, The off-axis residual aberration is relatively large, the exit pupil and field of view of the system are small, resulting in difficult overall design, long processing and assembly cycle, high cost, complex structure of optical lens group, large quality and volume

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