title: The α-β circular scanning with large range and low noise.
abstract: A circular-route scanning method called α-β circular scanning is proposed and realized using sinusoidal signals with a constant phase difference of π/2. Experiments show that the circular scanning range of α-β circular scanning is 57% greater than the rectangular scanning range of raster scanning within an effective optical field of view. Moreover, the scanning speed is improved by 7.8% over raster scanning because the whole sine signal is utilized in α-β circular scanning whereas the flyback area of the saw-tooth signal needs to be discarded in raster scanning. The maximum scanning acceleration decreases by a factor of 44, drastically decreasing the high noise, which should considerably elongate the lifetime of the galvanometers while inhibiting internal vibration. The proposed α-β circular scanning technique could be used in scanning imaging, optical tweezers and laser-beam fabrication.
authors.affiliation: Centre of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin, China.
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.affiliation: Centre of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin, China.
authors.forename: X
authors.initials: X
authors.lastname: You
authors.affiliation: Centre of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Centre of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin, China.
authors.forename: K
authors.initials: K
authors.lastname: Gu
authors.affiliation: Centre of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin, China.
authors.forename: C
authors.initials: C
authors.lastname: Liu
authors.affiliation: Centre of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin, China.
authors.forename: J
authors.initials: J
authors.lastname: Tan
keywords: Distortion; galvanometer; large range; low noise; scanning