An object of the present invention is to provide a virtual image display optical system that is capable of substantially simultaneously displaying virtual images at a plurality of distances even with a simple configuration, and an image display device using the virtual image display optical system. A virtual image display optical system (30) according to the present invention is provided with: a display element (11); a projection optical system (15) that enlarges an image formed on the display element (11); a diffusing screen (16) that has a diffusing function, and is positioned on the light emission side of the projection optical system (15); and a virtual image forming optical system (17) that converts an image on the diffusing screen (16) into a virtual image, wherein the virtual image display optical system (30) is further provided with a positioning changing device (62) that changes a position of the diffusing screen (16).
Virtual image display optical system and image display device
2020-12-15
Patent
Elektronische Ressource
Englisch
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