US 11,789,257 B2
Optical fiber, optical fiber scanner and projection apparatus
Jiazhou Wang, Sichuan (CN); Chao Chen, Sichuan (CN); and Dawei Shen, Sichuan (CN)
Assigned to CHENGDU IDEALSEE TECHNOLOGY CO., LTD., Chengdu (CN)
Appl. No. 17/598,764
Filed by CHENGDU IDEALSEE TECHNOLOGY CO., LTD., Sichuan (CN)
PCT Filed Mar. 10, 2020, PCT No. PCT/CN2020/078583
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/192410, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 201910233863.6 (CN), filed on Mar. 26, 2019.
Prior Publication US 2022/0197017 A1, Jun. 23, 2022
Int. Cl. G02B 26/10 (2006.01); G02B 6/02 (2006.01)
CPC G02B 26/10 (2013.01) [G02B 6/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical fiber, wherein a fiber core end face of the optical fiber is designed as being recessed inwardly to form a negative focal power, such that an equivalent light-emitting surface of the fiber core end face is focused reversely inside a fiber core, wherein the equivalent light-emitting surface has a projection area smaller than that of the fiber core end face.