Scanning optical apparatus

Details Scanning optical apparatus Scanning optical apparatus

2011-03-27

2011-12-13

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S207300, C359S207400, C359S216100

Reexamination Certificate

active

08077370

ABSTRACT:
In a scanning optical apparatus including a single lens configured to convert a beam deflected by a polygon mirror into a spot-like image on a scanned surface, an angle β2[deg] formed in a main scanning plane between the first optical axis and the second optical axis of the opposite lens surfaces of the lens satisfies the condition of −0.6<β2≦−0.1, and at least one of the conditions −0.5<β1<0 and −0.1<D2<0.2 are satisfied where β1indicates an angle [deg] formed in the main scanning plane between the first optical axis and a reference line perpendicular to the scanned surface, and D2indicates an amount of shift [mm] in the main scanning plane, of a point of intersection between the second optical axis and the exit-side lens surface, from the first optical axis.

REFERENCES:
patent: 6104522 (2000-08-01), Hayashi et al.
patent: 6137617 (2000-10-01), Yoshikawa et al.
patent: 2008/0158331 (2008-07-01), Kato
patent: 2008/0225105 (2008-09-01), Kudo
patent: H09-281422 (1997-10-01), None
patent: H10-142543 (1998-05-01), None
patent: 2000-180781 (2000-06-01), None

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