US 12,405,461 B2
Method of determining and maintaining scanning condition for optimal Lissajous scanning
Cheol Song, Daegu (KR); and Jintaek Im, Sacheon-si (KR)
Assigned to DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY, Daegu (KR)
Filed by DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY, Daegu (KR)
Filed on Sep. 19, 2022, as Appl. No. 17/947,533.
Claims priority of application No. 10-2021-0124891 (KR), filed on Sep. 17, 2021.
Prior Publication US 2023/0106944 A1, Apr. 6, 2023
Int. Cl. G02B 26/10 (2006.01); G01S 7/481 (2006.01)
CPC G02B 26/101 (2013.01) [G01S 7/4817 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of determining and maintaining a scanning condition for optimal Lissajous scanning performed by a processing device, the method comprising:
selecting a frequency combination and a mapping time delay difference, when minimum scanning density according to the mapping time delay difference in the frequency combination within a preset frequency range for two axes is maximum, as an optimal scanning condition; and
maintaining optimal scanning by applying a modulated drive phase offset to compensate for a deviation between an actual time delay difference and an optimal time delay difference selected as the optimal scanning condition due to a delay index adjusted according to an actual phase change,
wherein a mapping time delay is adjusted by a delay index of each axis, a phase of each axis has a phase change amount determined by the delay index, and the modulated drive phase offset is obtained by reflecting the phase change amount.