Appeal No. 1999-1117
Application 08/674,308
This is a decision on appeal under 35 U.S.C. § 134 from
the final rejection of claims 1-9.
We reverse.
BACKGROUND
The disclosed invention relates to laser beam intensity
control and start of scan detection in laser raster output
scanners. The control of laser beam intensity is important
for optimal exposure control and the detection of the start of
each scan line enables the synchronization of the modulation
with the position of the photoreceptor. In the prior art,
start of scan detection and beam intensity control were
performed using separate photodetectors and separate
electronic systems. The invention relates to performing start
of scan detection and beam intensity control using a single
photosensor.
Claim 1 is reproduced below.
1. A raster output scanner, comprising:
a laser source for generating a laser beam having an
intensity that is dependent upon a beam control signal;
a rotating polygon for sweeping the laser beam along
a scan line plane;
an optical fiber with a light receiving end and an
[sic] light exit end, wherein said light receiving end is
- 2 -
Page: Previous 1 2 3 4 5 6 7 Next
Last modified: November 3, 2007