US 11,947,104 B2
Reflective spiral phase plate, and apparatus for generating Laguerre Gaussian beam comprising same
I Jong Kim, Seo-gu (KR); Ji Yong Bae, Yuseong-gu (KR); Hong Seung Kim, Sejong (KR); Geon Hee Kim, Sejong (KR); Ki Soo Chang, Yuseong-gu (KR); Cheonha Jeon, Jinju (KR); Il Woo Choi, Buk-gu (KR); and Chang Hee Nam, Buk-gu (KR)
Assigned to KOREA BASIC SCIENCE INSTITUTE, Yeonsu-gu (KR); INSTITUTE FOR BASIC SCIENCE, Yuseong-gu (KR); and GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY, Buk-gu (KR)
Appl. No. 17/641,770
Filed by KOREA BASIC SCIENCE INSTITUTE, Yeonsu-gu (KR); INSTITUTE FOR BASIC SCIENCE, Yuseong-gu (KR); and GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY, Buk-gu (KR)
PCT Filed Sep. 9, 2020, PCT No. PCT/KR2020/012155
§ 371(c)(1), (2) Date Mar. 9, 2022,
PCT Pub. No. WO2021/049867, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 10-2019-0112290 (KR), filed on Sep. 10, 2019; and application No. 10-2020-0113301 (KR), filed on Sep. 4, 2020.
Prior Publication US 2022/0382041 A1, Dec. 1, 2022
Int. Cl. G02B 26/06 (2006.01); G02B 26/08 (2006.01); G02B 27/00 (2006.01)
CPC G02B 26/06 (2013.01) [G02B 26/0825 (2013.01); G02B 27/0068 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A spiral phase plate for generating a Laguerre Gaussian beam by reflecting an incident beam emitted from a light source, the spiral phase plate comprising:
a first quadrant area in which a step increase rate per unit angle decreases progressively in one direction from a point with a lowest step to a point with a highest step; and
a second quadrant area in which a step increase rate per unit angle increases progressively in the one direction.