Light beam scanning optical system

Details Light beam scanning optical system Light beam scanning optical system

1991-07-31

1992-09-08

Church, Craig E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359217, G02B 2610

Patent

active

051463601

ABSTRACT:
A light beam scanning optical system having a linear image forming optical system for converging a laser beam from a light source into linear images on the deflection reflecting surface of deflector, and a scanning image forming optical system for causing the laser beam reflected from the deflector to form images on the object to be scanned, wherein said scanning image forming optical system including at least one toric surface and at least one compound lens composed of a positive lens and a negative lens, whereby the object is scanned correctly by the laser beam despite a difference in wavelength between the laser beams used or variations in the wavelength of the beam.

REFERENCES:
patent: 4919502 (1990-04-01), Yamakawa
patent: 4963900 (1990-10-01), Budd et al.

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