US 12,474,583 B2
Virtual image display apparatus
Takashi Takeda, Suwa (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Oct. 28, 2022, as Appl. No. 17/976,113.
Claims priority of application No. 2021-177167 (JP), filed on Oct. 29, 2021.
Prior Publication US 2023/0139134 A1, May 4, 2023
Int. Cl. G02B 27/01 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 2027/011 (2013.01); G02B 2027/013 (2013.01); G02B 2027/0178 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A virtual image display apparatus comprising:
an imaging light emitting unit that emits an imaging light;
a first mirror that reflects the imaging light from the imaging light emitting unit;
an optical member that includes a reflecting portion reflecting the imaging light reflected by the first mirror; and
a second mirror that reflects the imaging light reflected by the reflecting portion toward a position of an exit pupil, wherein
a distance from the imaging light emitting unit to the first mirror is shorter than a distance from the position of the exit pupil to the second mirror; and
a first angle between the imaging light incident on the second mirror and the imaging light reflected by the second mirror is greater than 0° and 45° or less,
the optical member includes an incidence-emission portion where the imaging light from the first mirror is incident and where the imaging light reflected by the reflecting portion is emitted; and
the incidence-emission portion is configured to refract the imaging light incident and the imaging light emitted,
the incidence-emission portion is an aspheric surface or a free curved surface.