Patent ID: 7042606

Claim:
A light modulator type multi-beam scanning apparatus using a dichroic slit, comprising: a first lens unit for converting a plurality of beams of light, which are emitted from a plurality of light sources, into collimated beams, respectively, and outputting the collimated beams; a plurality of light modulators for modulating the collimated beams, which are emitted from the first lens unit, into diffracted beams having a plurality of diffraction orders, respectively; a focusing unit for forming a multi-diffracted beam by focusing the diffracted beams having a plurality of diffraction orders; a second lens unit for separating the multi-diffracted beam, which is focused by the focusing unit, into separate diffracted beams according to diffraction orders; a dichroic slit for selectively transmitting some of the separate diffracted beams having one or more predetermined diffraction orders; and a third lens unit for projecting the some of the separate diffracted beams, which are selectively transmitted by the dichromatic mirror, onto an object.