US 12,422,666 B2
Optical scanning device, driving method of optical scanning device, and image drawing system
Shinichiro Sonoda, Kanagawa (JP); and Hirotoshi Yoshizawa, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Mar. 8, 2023, as Appl. No. 18/180,273.
Claims priority of application No. 2022-050810 (JP), filed on Mar. 25, 2022.
Prior Publication US 2023/0305293 A1, Sep. 28, 2023
Int. Cl. G02B 26/08 (2006.01); G02B 26/10 (2006.01)
CPC G02B 26/0858 (2013.01) [G02B 26/101 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An optical scanning device comprising:
a mirror portion that has a reflecting surface on which an incidence ray is reflected;
a first actuator that causes the mirror portion to swing around a first axis which is in a plane including the reflecting surface at a time of a standstill of the mirror portion;
a second actuator that causes the mirror portion to swing around a second axis which is in the plane including the reflecting surface at the time of the standstill of the mirror portion and which intersects with the first axis;
a first angle detection sensor that outputs a signal corresponding to an angle of the mirror portion around the first axis;
a second angle detection sensor that outputs a signal corresponding to an angle of the mirror portion around the second axis; and
at least one processor,
wherein the processor is configured to:
provide a first driving signal having a first driving frequency to the first actuator;
provide a second driving signal having a second driving frequency to the second actuator;
derive a first integrated value by integrating a first phase delay time of the output signal of the first angle detection sensor with respect to a first signal to be referred to corresponding to the first driving signal, the number of times that is greater by a factor of a natural number than the number of times corresponding to a period of time of one frame of a motion image to be drawn; and
derive a second integrated value by integrating a second phase delay time of the output signal of the second angle detection sensor with respect to a second signal to be referred to corresponding to the second driving signal, the number of times that is greater by a factor of a natural number than the number of times corresponding to the period of time of one frame.