IMAGE DISPLAY DEVICE

摘要

An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided.

主权项

1. An image display device comprising:
an image forming device; and an optical device, wherein said optical device includes
a light guide plate wherein input light is propagated internally,a first diffraction grating member for diffracting and reflecting light input to said light guide plate which is disposed on said light guide plate, anda second diffraction grating member for diffracting and reflecting light propagated within said light guide plate which is disposed on said light guide plate, wherein the thickness of said second diffraction grating member is thinner than the thickness of said first diffraction grating member.