Holographic laser beam scanning apparatus

Details Holographic laser beam scanning apparatus Holographic laser beam scanning apparatus

1991-12-13

1993-10-12

Bovernick, Rodney B.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 18, 359209, G02B 532, G02B 2610

Patent

active

052530876

ABSTRACT:
A holographic laser beam scanning apparatus capable of removing astigmatism created by a hologram disc of the apparatus due to discordance of wave fronts of the laser beams, thereby allowing precise scanning to be effected. The apparatus includes a focusing lens for focusing a laser beam generated by a laser generator, and a hologram for converting the focused beam into a parallel beam, both the lens and hologram being disposed between the laser generator for generating the laser beam and the hologram disc for irradiating the parallel beam as a diffracted beam.

REFERENCES:
patent: 4957336 (1990-09-01), Hasegawa et al.
patent: 4981332 (1991-01-01), Smith

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