Two-mirror scanner with pincushion error correction

Details Two-mirror scanner with pincushion error correction Two-mirror scanner with pincushion error correction

1991-08-12

1992-09-22

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359205, 359221, 250234, G02B 2610

Patent

active

051502496

ABSTRACT:
A two-dimensional scanner employs first and second pivotable mirrors (36 and 40) to control the position of the target point that a light spot assumes in a target plane (44). The second mirror (40) is driven in a resonant mode. An f.multidot..theta. lens (42) converts the pincushion error that would otherwise result into a barreling error, which can be compensated for by controlling the amplitude of the second mirror's oscillations.

REFERENCES:
patent: 4003626 (1977-01-01), Reinke et al.
patent: 4685775 (1987-08-01), Goodman et al.
patent: 4714830 (1987-12-01), Usui
patent: 5048904 (1991-09-01), Montagu

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