SCANNING OPTICAL SYSTEM

WIPO Patent Application WO/2024/069854

A1

Provided is a scanning optical system that includes first and second light sources, a polygon mirror, and first through fourth scanning lenses, the scanning optical system being configured so that the mathematical expressions below are satisfied, where A1 and A2 are the respective apexes of incidence-side surfaces of the first and second scanning lenses, an x-axis is defined as the direction of a rotational axis of the polygon mirror, a y-axis is defined as the scanning direction of a luminous flux, a z-axis is defined so as to be orthogonal to the x-axis and the y-axis, P1 and P2 are respective reference points of deflection of luminous fluxes from the first and second light sources, L1 is the distance between point P1 and point A1 in the z-axis direction, L2 is the distance between point P2 and point A2 in the z-axis direction, Lp12 is the distance between point P1 and point P2 in the z-axis direction, h1 is the thickness of the first scanning lens in the x-axis direction, h2 is the thickness of the second scanning lens in the x-axis direction, and θ1 and θ2 are each acute angles formed with the y-axis by straight lines obtained by projecting the principal ray of luminous fluxes arriving at the polygon mirror from the first and second light sources onto the plane that includes the x-axis and the y-axis.

JPH11109275	LASER PLOTTING DEVICE
JP2000321520	OPTICAL INFORMATION READER

ODA JUMPEI (JP)
KUWAGAITO TOMOHITO (JP)

PCT/JP2022/036445

April 04, 2024

September 29, 2022

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NALUX CO LTD (JP)

G02B26/12; B41J2/47; H04N1/113

JP2013020045A	2013-01-31
JP2014048313A	2014-03-17
JP2016085433A	2016-05-19
JP2008209675A	2008-09-11

FUSHIMI, Naoya (JP)

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