US 12,461,371 B2
Head-mounted display and virtual image forming lens to be used for the head-mounted display
Yasushi Miyajima, Gamagori (JP); and Yasuhiro Takaki, Fuchu (JP)
Assigned to National University Corporation Tokyo University of Agriculture and Technology, Fuchu (JP); and Itoh Optical Industrial Co., Ltd., Gamagori (JP)
Appl. No. 17/791,736
Filed by National University Corporation Tokyo University of Agriculture and Technology, Fuchu (JP); and Itoh Optical Industrial Co., Ltd., Gamagori (JP)
PCT Filed Jan. 18, 2021, PCT No. PCT/JP2021/001443
§ 371(c)(1), (2) Date Jul. 8, 2022,
PCT Pub. No. WO2021/149628, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 2020-009320 (JP), filed on Jan. 23, 2020.
Prior Publication US 2023/0032859 A1, Feb. 2, 2023
Int. Cl. G02B 27/00 (2006.01); G02B 27/01 (2006.01); G02B 27/14 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 27/144 (2013.01); G02B 2027/0134 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A head-mounted display comprising:
a display device to display images for the left eye and the right eye on a screen; and
virtual image forming optical systems for the left eye and the right eye respectively disposed with respect to the images for the left eye and the right eye on the screen,
wherein the virtual image forming optical systems have positive power set in respective regions that visual lines of a user pass through, and include, at outer sides of optical centers in directions orthogonal to respective optical axes, power adjusting regions having power set closer to the negative side than power at the optical centers,
wherein the power in the power adjusting regions changes more to the negative side toward the outer sides in the directions orthogonal to the respective optical axes, and
wherein absolute value of a change in amount of power with respect to the power at the optical centers in the power adjusting regions falls within a range of 0.10 to 3.00 units of diopter (D) at a position 15 mm away from the optical centers.