US 12,130,437 B2
Image display apparatus and AR glasses
Hiroshi Sato, Minamiashigara (JP); Katsumi Sasata, Minamiashigara (JP); and Yukito Saitoh, Minamiashigara (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jun. 24, 2022, as Appl. No. 17/849,181.
Application 17/849,181 is a continuation of application No. PCT/JP2020/047378, filed on Dec. 18, 2020.
Claims priority of application No. 2019-239115 (JP), filed on Dec. 27, 2019.
Prior Publication US 2022/0373809 A1, Nov. 24, 2022
Int. Cl. G02B 27/01 (2006.01); G02F 1/1335 (2006.01); G02F 1/1337 (2006.01)
CPC G02B 27/0172 (2013.01) [G02F 1/133504 (2013.01); G02F 1/133543 (2021.01); G02F 1/1337 (2013.01); G02B 2027/0178 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An image display apparatus comprising:
a display element; and
a reflective polarization diffraction element that reflects an image displayed by the display element,
wherein the polarization diffraction element is arranged such that a distance between a main surface of the polarization diffraction element and the display element increases in one direction, and
wherein the polarization diffraction element has a region where a period of a diffraction structure decreases in a direction away from the display element.