Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-12-29
1999-08-31
Phan, James
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359217, 359218, 359219, G02B 2608
Patent
active
059461241
ABSTRACT:
A laser scanning unit includes an emitting portion for emitting laser beams, a deflecting portion having a plurality of mirror surfaces at its side portions to deflect the laser beams upon a predetermined position of a pickup surface by rotation of a predetermined speed, and a pickup portion for scanning the laser beams deflected by the deflecting portion into the pickup surface. A rotative noise reducing portion is formed at a plurality of edges formed by the plurality of adjacent mirror surfaces of a polygon mirror which acts as the deflecting portion. Preferably, the rotative noise reducing portion includes at least one air groove at the portion where the mirror surfaces connect, so as to be formed around the edges of the mirrors. Thus, it is possible to reduce the pressure difference between the mirror surfaces with the air groove, thereby reducing noise during rotation of the polygon mirror.
REFERENCES:
patent: 4518218 (1985-05-01), Diepeveen
patent: 5024496 (1991-06-01), Otkawa
Choi Hwan-Young
Moon Kwang-ho
Phan James
Samsung Electronics Co,. Ltd.
LandOfFree
Laser scanning unit having a noise reducing portion does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser scanning unit having a noise reducing portion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser scanning unit having a noise reducing portion will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2427754