Raster output scanning system with a super-elliptic laser beam s

Details Raster output scanning system with a super-elliptic laser beam s Raster output scanning system with a super-elliptic laser beam s

1995-10-06

1998-11-10

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359207, G02B 2608

Patent

active

058352538

ABSTRACT:
The optical path length of a raster output scanning (ROS) system is minimized by the use of a laser beam source for emitting a light beam with an enlarged divergence ratio. A super-elliptic light source beam with at least an 8:1 elliptic ratio of the major cross-scan axis to the minor scan axis will minimize the optical path length of a raster output scanning (ROS) system. The large divergence ratio of the super-elliptic light beam reduces the required focal lengths in the ROS optics while maintaining the desired numerical apertures and high energy throughput.

REFERENCES:
patent: 5033806 (1991-07-01), Tomita et al.
patent: 5475522 (1995-12-01), Itabashi et al.
patent: 5557449 (1996-09-01), Miyagawa et al.

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