Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1999-12-03
2000-08-08
Phan, James
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359206, 359212, 359216, G02B 2608
Patent
active
061010200
ABSTRACT:
An optical scanner is provided that reduces chromatic aberration (focus error) due to mode hopping of a semiconductor laser light source and that can give high-resolution output applicable to digital copiers and optical printers even when using an imaging optical system having only a few lens elements. At least one surface of the collimating lens includes a zone plate diffractive optical surface which meets specified design conditions to ensure that the focus error due to mode hopping is acceptably small.
REFERENCES:
patent: 5808775 (1998-09-01), Inagaki et al.
Arnold Bruce Y.
Fuji Photo Optical Co., Ltd.
Phan James
LandOfFree
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