Laser beam scanner

Details Laser beam scanner Laser beam scanner

1995-05-31

1996-10-15

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359207, 359216, 359662, 347259, G02B 2608

Patent

active

055660169

ABSTRACT:
A laser beam scanner is composed of an optical source, a beam deflector for deflecting the beam emitted from the optical source and a sensitive drum for performing printing and photosensitive processes from the beam after its deflection by the beam deflector. Also, the laser beam scanner comprises an f-.theta. lens between the beam deflector and sensitive drum for increasing resolution. The f-.theta. lens is composed of a first lens for correcting aberrations and a second lens for correcting the deflected beam passed through the first lens. The f-.theta. lens is made of plastic whose cost is lower than that of glass and can be easily manufactured since the beam emitting surface of the f-.theta. lens is spherical.

REFERENCES:
patent: 5196957 (1993-03-01), Brueggemann
patent: 5221986 (1993-06-01), Itabashi

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