Light beam scanner

Optical: systems and elements – Deflection using a moving element

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Details

359216, 25022731, 250235, G02B 2608, H01J 516

Patent

active

052106349

ABSTRACT:
A light beam emitted from a light source such as a semiconductor laser, is irradiated onto a recording section such as a photosensitive drum, through a scanning section composed of a rotary polygonal mirror. In a predetermined position in a plane formed by the scanning light beam, a columnar fluorescent optical fiber is arranged perpendicular to this plane, containing fluorescent substances therein. The fluorescent substances generate fluorescent light when the light beam is incident onto these fluorescent substances which is received by the photodetector arranged on the end face of the fluorescent optical fiber. As a result, even when a reflecting face of the rotary polygonal mirror is inclined irregularly, the light beam is incident to the fluorescent optical fiber so that it is not necessary to adjust the position of the fluorescent optical fiber.

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