Multiple-beam scanning optical systems are widely used for highspeed 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 a couple of lenses, and designed four-beam optical system with a converting function of seven-level print-dotdensity.
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 Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP21), 2005, pp 570 - 573, https://doi.org/10.2352/ISSN.2169-4451.2005.21.1.art00061_2