US 12,032,144 B2
Internal-reflective telecentric lens system
Tianshu Zhang, Shenzhen (CN); Ruibin Huang, Shenzhen (CN); Li Zhu, Shenzhen (CN); Fanglu Lyu, Shenzhen (CN); and Bo Wang, Shenzhen (CN)
Assigned to Shenzhen Guangjian Technology Co., Ltd., Shenzhen (CN)
Filed by SHENZHEN GUANGJIAN TECHNOLOGY CO., LTD., Guangdong (CN)
Filed on Feb. 16, 2023, as Appl. No. 18/110,754.
Application 18/110,754 is a continuation of application No. 17/105,058, filed on Nov. 25, 2020, granted, now 11,586,023.
Claims priority of application No. 202010894081.X (CN), filed on Aug. 31, 2020; application No. 202022331891.2 (CN), filed on Oct. 20, 2020; and application No. 202022331921.X (CN), filed on Oct. 20, 2020.
Prior Publication US 2023/0194839 A1, Jun. 22, 2023
Int. Cl. G02B 13/22 (2006.01); G02B 9/34 (2006.01); G02B 13/00 (2006.01)
CPC G02B 13/22 (2013.01) [G02B 9/34 (2013.01); G02B 13/0065 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An internal-reflective telecentric lens system, comprising:
a first lens assembly;
a reflector; and
a second lens assembly, wherein:
the first lens assembly comprises a first lens;
the second lens assembly comprises a second lens, a third lens, and a fourth lens, that are disposed in sequence along a light path;
the reflector is disposed at an image side of the first lens;
the second lens is disposed at an image side of the reflector;
the fourth lens is disposed at an image side of the second lens;
the first lens assembly is configured to receive and output one or more light beams towards the reflector;
the reflector is configured to reflect the one or more light beams towards the second lens assembly;
the second lens assembly is configured to receive and converge the one or more light beams reflected by the reflector at a diaphragm between the second lens and the fourth lens, and transmit the one or more light beams past the diaphragm through the fourth lens for imaging;
an object-side surface of the third lens is concave, and an image-side surface of the third lens is convex, and
the fourth lens has a negative optical power, an object-side surface of the fourth lens is concave, and an image-side surface of the fourth lens is convex.