Light beam scanner

Abstract

Abstract PURPOSE:To enable the free adjustment of the spacing between scanning lines by plural light beams from 0 up to an optional value according to the need by providing optical elements for deflecting the light beams in the direction perpendicular to a scanning direction. CONSTITUTION:Three light sources 1a-1c are juxtaposed in a perpendicular (at a right angle to the scanning direction) direction, and the three light beams formed by the same are converged as they are separately on the surface 7 to be scanned by an ftheta lens 6. Mirrors 8a-8c are inserted to reflect the beam back onto a cylinder 7<1> which is the surface to be scanned so that the three beams are focused apart from each other by a prescribed spacing on the cylinder 7<1>. At the same time, the spacing between the plural scanning lines to be swept is made equal to the inter-dot spacing of a laser printer or the like or is made approximate to each other to the extent not much larger than the same; therefore, the scanner hardly receives the influence of the errors in the positioning of the surface to be scanned or feed errors, oscillation, etc.

Inventors

• 👤 Yoshiaki Matsunaga
• 👤 松永　佳昭

Bibliographic Details