Diffractive laser scanner

Details Diffractive laser scanner Diffractive laser scanner

1996-07-19

1999-01-12

Spyrou, Cassandra C.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359565, 359 18, 359205, 359206, 359207, G02B 532, G02B 2610, G02B 2744, G02B 2608

Patent

active

058597158

ABSTRACT:
A scanner (40) is disclosed which includes a source of coherent light (12), a radial holographic deflector (16), a F.theta. lens (62), which images a scanned spot onto an image plane (18). The F.theta. lens (62) is comprised of a decentered aspheric mirror (64) and a diffractive--refractive toroidal lens (66). The apparatus is relatively insensitive to variations in the wavelength of the source of coherent light.

REFERENCES:
patent: 4505537 (1985-03-01), Funato
patent: 4753503 (1988-06-01), Day et al.
patent: 4810046 (1989-03-01), Yamagishi et al.
patent: 5182659 (1993-01-01), Clay et al.
patent: 5457550 (1995-10-01), Baba et al.
patent: 5486694 (1996-01-01), Harris
patent: 5619350 (1997-04-01), Taki

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