US 12,111,513 B2
Optical lens and head-mounted display device
Tao-Hung Kuo, Hsin-Chu (TW); and Fu-Ming Chuang, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Jun. 15, 2020, as Appl. No. 16/901,000.
Claims priority of provisional application 62/866,634, filed on Jun. 26, 2019.
Claims priority of application No. 202010155853.8 (CN), filed on Mar. 9, 2020.
Prior Publication US 2020/0409034 A1, Dec. 31, 2020
Int. Cl. G02B 9/34 (2006.01); F21V 8/00 (2006.01); G02B 13/00 (2006.01); G02B 13/18 (2006.01); G02B 27/01 (2006.01)
CPC G02B 9/34 (2013.01) [G02B 6/0025 (2013.01); G02B 6/0036 (2013.01); G02B 13/004 (2013.01); G02B 13/18 (2013.01); G02B 27/0172 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An optical lens, adapted to receive an image beam from an image generator, wherein a prism is disposed between the optical lens and the image generator, the optical lens comprising:
a first lens, a second lens, a third lens, and a fourth lens sequentially arranged from a light exit side to a light incident side, and refractive powers of the first lens, the second lens, the third lens, and the fourth lens being sequentially positive, negative, positive, and positive, wherein the image generator is disposed at the light incident side, the image beam forms a stop at the light exit side, and the stop has the minimum cross-sectional area of beam convergence of the image beam,
wherein the prism does not have a refractive power and is configured to guide the image beam from the image generator to the fourth lens, and the image beam is directly incident onto the fourth lens after the image beam leaves from the prism,
wherein the fourth lens is a concavo-convex lens and has a concave surface facing the light incident side,
wherein the first lens is a biconvex lens, the second lens is a convexo-concave lens and has a convex surface facing the light incident side, the third lens is a biconvex lens.