1986-06-17
1988-05-31
Corbin, John K.
G02B 2610, H01J 314
Patent
active
047476478
ABSTRACT:
A scanning device is described which comprises a rotationally symmetrical rotating reflecting facet disc (3) in which a scanning beam (2, 2') is focussed on a face (5, 6) of the facet elements (4). The sensitivity of the device to surface defects or dust particles on the faces of the facet elements can be reduced by means of a first astigmatic element (20) which widens the beam (2') issuing from the detector (10) at the location of the facet disc in a direction transverse to the scanning direction (18), while a second astigmatic element (21) cancels the astigmatism of the first element.
REFERENCES:
patent: 3787107 (1974-01-01), Sick et al.
patent: 3817593 (1974-06-01), Harris et al.
patent: 3909105 (1975-09-01), Neiswander et al.
patent: 4019804 (1977-04-01), Collier
patent: 4106845 (1978-08-01), Moore et al.
patent: 4496209 (1985-01-01), Itoh et al.
patent: 4508422 (1985-04-01), Karlsson
patent: 4519680 (1985-05-01), Grollimund
patent: 4585296 (1986-04-01), Minoura et al.
IBM Journal of Reasearch and Development, vol. 21, No. 5, Sep. 1977, "Laser-Optical System of the 3800 Printer", by Fleischer et al., pp. 480-483.
de Zoeten Peter
Smid Albert
Botjer William L.
Corbin John K.
Kachmarik Ronald M.
U.S. Philips Corp.
LandOfFree
Optical scanning device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical scanning device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical scanning device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1870231