Appeal No. 97-3467
Application 08/279,748
6-12 as being unpatentable over Morimoto and Takemoto.
Claim 1 expressly recites the following criteria for
limiting
the height of the drawing beams on the drawing surface:
wherein there is the following relationship:
* =cos { 2 cos" X cos T - cos " }-1 2
( =tan { sin" / ( 2cos" x sinT x cosT ) }-1
(* sin( - " ) < p/f
wherein
"f" designates the focal length of the scanning optical
system;
""" the incident angle of a drawing beam upon the reflecting
surface of the deflecting mirror in a sub-scanning direction
normal to said main scanning direction;
"T" the angle of a line normal to the reflecting
surface of the deflecting mirror with respect to
a bisector of the optical axis of the scanning
optical system and the axis of an incident beam;
"p" the pitch of the aligned drawing beams;
"*" the angle of the drawing beams reflected by
the reflecting surface of the deflecting mirror
with respect to the optical axis of the scanning
optical system; and,
"(" the angle of a line connecting an image
forming point of the drawing beams reflected by
the reflecting surface on the drawing surface and
an intersecting point on the optical axis of the
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Last modified: November 3, 2007