Multiple beam scanning optical system

Details Multiple beam scanning optical system Multiple beam scanning optical system

1996-09-03

1999-09-28

Spyrou, Cassandra

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359196, 359210, 359739, 359820, G02B 2608

Patent

active

059597593

ABSTRACT:
An optical unit provided between a plurality of light sources and a deflecting system in a multiple beam scanning optical system in which the appropriate intensity and appropriate intensity distribution of each beam on the scanned surface change are maintained regardless of foreseen changes in ambient temperature. The optical unit includes a condenser lens which condenses the beams emitted from the light sources and an aperture which regulates diameters of beams projected from the condenser lens. A connecting member which connects the condenser lens and the aperture at a distance corresponding to a focal length of the condenser lens. The connecting member is formed of material or materials whose amount of linear expansion per unit of temperature is approximately equal to an amount of change in the focal length of the condenser lens per unit of temperature

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