Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-10-08
1998-04-14
Phan, James
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359216, G02B 2608
Patent
active
057399409
ABSTRACT:
A high-performance, low-cost multi-beam scanning optical device prevents picture quality from being degraded owing to the chromatic aberration of a cylindrical lens and an image formation lens system. In this multi-beam scanning optical device, a synthetic beam L.sub.0 is synthesized by a beam synthesizer from laser light beams L.sub.1 and L.sub.2, which are respectively generated by different semiconductor lasers and are different in wavelength from each other. The synthetic beam is then deflected and used for scanning. Subsequently, the synthetic beam is led through an image formation lens system to a beam splitter whereupon the synthetic beam is split into scanning light beams L.sub.3 and L.sub.4. Thereafter, images are formed from the scanning light beams L.sub.3 and L.sub.4 on a light-sensitive drum that serves as a recording medium. Further, degradation in picture quality due to the chromatic aberration is prevented by providing a grating lens, which is operative to offset or cancel out the chromatic aberration of lenses of the image formation lens system, in an optical path of the synthetic beam.
REFERENCES:
patent: 4435041 (1984-03-01), Torok et al.
patent: 4774542 (1988-09-01), Kondo
patent: 4894682 (1990-01-01), Kondo et al.
Canon Kabushiki Kaisha
Phan James
LandOfFree
Multi-beam scanning optical device with a chromatic aberration c does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-beam scanning optical device with a chromatic aberration c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-beam scanning optical device with a chromatic aberration c will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-640914