Manufacturing method of scanning optical system

Details Manufacturing method of scanning optical system Manufacturing method of scanning optical system

2005-10-11

2005-10-11

Pham, Hai (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S258000

Reexamination Certificate

active

06954222

ABSTRACT:
A laser beam emitted by a light source is incident on one of reflecting surfaces of a polygon mirror. The laser beam reflected by the reflecting surface is dynamically deflected in a main scanning direction due to the revolution of the polygon mirror and enters a scanning lens. The first surface of the scanning lens is provided with anti-reflection coating only when the following condition (1) is satisfied:in-line-formulae description="In-line Formulae" end="lead"?H/2>|2βD(D−Rz1)/Rz1|  (1)in-line-formulae description="In-line Formulae" end="tail"?where “H” denotes the width of each reflecting surface of the polygon mirror in a auxiliary scanning direction, “β” denotes the incident angle [radian] of the laser beam on the reflecting surface of the polygon mirror in the auxiliary scanning direction, “D” denotes the distance between the reflecting surface and the first surface of the scanning lens, and “Rz1” denotes the curvature radius of the first surface in an auxiliary scanning cross section.

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patent: 4993792 (1991-02-01), Minoura
patent: 5191463 (1993-03-01), Minoura
patent: 5646767 (1997-07-01), Iima et al.
patent: 5680242 (1997-10-01), Ando
patent: 5841463 (1998-11-01), Debesis et al.
patent: 6667757 (2003-12-01), Yamaguchi et al.
patent: 5-346553 (1993-12-01), None

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