In an aircraft HMD, a visor has toroidally-shaped portions respectively corresponding to left and right eyes of a user, and the toroidally-shaped portions are connected at a substantially central part between the user's eyes. The toroidally-shaped portions are aspherical shapes having a smaller curvature in a vertical direction than in a horizontal direction. Two sets of an image display section and a projection optical system are provided independently corresponding to the left and right toroidally-shaped portions. Due to the difference in curvature, a difference in optical power caused, for example, by a difference in incident angle on the reflecting surface is eliminated. This lessens astigmatism and allows display of an image with a wider visual field. An intermediate image is formed in both the vertical and horizontal directions within the projection optical system or in the middle of an optical path from the projection optical system to the reflecting surface.
HEAD MOUNTED DISPLAY DEVICE
2020-10-29
Patent
Electronic Resource
English
European Patent Office | 2019
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