US 12,282,157 B2
Ocular optical system
Matthew Bone, Fujian (CN)
Assigned to GENIUS ELECTRONIC OPTICAL CO., LTD., Taichung (TW)
Filed by GENIUS ELECTRONIC OPTICAL CO., LTD., Taichung (TW)
Filed on May 19, 2022, as Appl. No. 17/748,037.
Application 17/748,037 is a continuation of application No. 16/788,307, filed on Feb. 12, 2020, granted, now 11,366,314.
Application 16/788,307 is a continuation of application No. 15/401,120, filed on Jan. 9, 2017, granted, now 10,606,070, issued on Mar. 31, 2020.
Claims priority of provisional application 62/396,242, filed on Sep. 19, 2016.
Prior Publication US 2022/0342209 A1, Oct. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 27/00 (2006.01); G02B 25/00 (2006.01); G02B 27/01 (2006.01); G02B 27/02 (2006.01); G02B 3/04 (2006.01)
CPC G02B 27/0025 (2013.01) [G02B 25/001 (2013.01); G02B 27/0172 (2013.01); G02B 27/027 (2013.01); G02B 3/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ocular optical system, for imaging of imaging rays entering an eye of an observer via the ocular optical system from a display screen, a side facing towards the eye being an eye-side, a side facing towards the display screen being a display-side, the ocular optical system comprising a first lens element, a second lens element, and a third lens element from the eye-side to the display-side in order along an optical axis, the first lens element, the second lens element, and the third lens element each comprising an eye-side surface and a display-side surface,
wherein lens elements of the ocular optical system are only the first lens element, the second lens element, and the third lens element,
the eye-side surface of the second lens element has a convex portion in a vicinity of the optical axis, and the display-side surface of the second lens element has a concave portion in a vicinity of the optical axis,
wherein the ocular optical system satisfies: 40°≤ω, where ω represents a half apparent field of view, which is one half the field of view of an observer,
wherein the second lens element has positive refracting power, and the ocular optical system satisfies: 1.4≤T1/T2≤4.0, where T1 is a thickness of the first lens element along the optical axis, and T2 is a thickness of the second lens element along the optical axis.