Multiple-beam scanning optical systems are widely used for high-speed and high-resolution printers. One of the requirements that the printer with several levels of print dot density has is conversion of intervals of scanning lines formed by multiple beams. For this purpose, we developed a converting lens system, which consists of two cylindrical lenses and a spherical lens, and designed a four-beam optical system with a converting function of seven levels in print dot density.
Takeshi Mochizuki, Yasuyuki Shibayama, Kazuhiro Akatsu, Junshin Sakamoto, Yasushi Hashimoto, Keiji Kataoka, "Four-Beam Scanning Optical System With a Converting Function of Seven-Level Print Dot Density" in Journal of Imaging Science and Technology, 2008, pp 20501-1 - 20501-4, https://doi.org/10.2352/J.ImagingSci.Technol.(2008)52:2(020501)