Three-dimensional helmet display of augmented reality system

Abstract

A three-dimensional helmet display of an augmented reality system is characterized by adopting an optical perspective type structure; being horizontally symmetrical by taking the nose part of a user as a central line; and being provided with an image source, a polarization azimuth adjustment mirror with adjustable azimuth, an optical imaging system and a polarization combination mirror in sequencefrom the external side to the human eye center along the optical axis direction, wherein the polarization combination mirror leads the light direction of the image source to be reflected and deflected by 90 degrees and then enter human eyes; the external light forms a 90-degree angle with the image source light, and then enters human eyes through the transmission of the polarization combination mirror after pass through the polarization mirror with the adjustable azimuth; two images forming a three-dimensional image pair are respectively transmitted to the image sources at the left side and the right side; the polarization azimuth adjustment mirror and the polarization combination mirror constitute an image source brightness adjustment unit; and the polarization mirror and the polarization combination mirror constitute an external light brightness adjustment unit. The invention can lead the virtual environment and the real environment of the three-dimensional helmet display to achievethe best matching state, eliminates the two-eye competition phenomenon, and is used for the augmented reality system.

Description

technical field [0001] The invention relates to a three-dimensional helmet-mounted display, more precisely, an optical see-through stereoscopic helmet-mounted display that realizes optimal integration of virtual and real environments by adjusting the brightness of an image source and external light. Background technique [0002] Head-Mounted Display (HMD) is a display installed on the user's helmet. Its active field of view can be as wide as 360 degrees, and it has the characteristics of large screen, portability and high presence. It is widely used in military, Simulation training, entertainment, medical and engineering fields. [0003] Augmented reality technology (Augmented Reality, AR) requires the integration of the virtual environment and the real environment, so that users can obtain the information of the virtual environment and the real environment at the same time, and the brightness of the virtual environment and the real environment must be optimally matched. Th...

AI Technical Summary

Problems solved by technology

[0005] 1. When under strong external light, the image brightness and contrast of the helmet display are low, and the image is covered by the external environment, so that the human eye can only see the external environment under strong light, and cannot clearly see the display information of the helmet display;

[0006] 2. When the external environment is dark, the image brightness of the helmet display is too high, and the external environment is blocked by the image source information, so that the human eye cannot see the external information

[0007] 3. In the binocular partial overlap, due to the difference in binocular observation images, binocular competition will result. In severe cases, it will cause image splitting, resulting in visual fatigue and increasing the workload of users.

[0008] Chinese patent 200710108422.0 discloses a head-mounted display that can adjust the intensity of ambient light. Two polarizers are stacked together, one of which is fixed, and the brightness of the external light is adjusted by adjusting the azimuth of the other polarizer. This patent cannot adjust the brightness of the virtual environment, so the user cannot see the external environment clearly

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