Patent ID: 6473233
Filing Date: 2002-10-29
Classification: B41J,G02B

Abstract:
A multi-beam optical system, comprising:a light source; a diffractive beam-dividing element that divides the light beam emitted from said light source into a plurality of light beams exiting therefrom at different diffraction angles, respectively; a converging element that is located at the exit side of said diffraction beam-dividing element to converge the beams exiting from said diffractive beam-dividing element; and a compensating optical system whose lateral magnification is inversely proportional to the wavelength of the light beam to compensate deviation in the diffraction angle of the diffracted light beams caused due to wavelength dependence of said diffraction beam-dividing element, said compensating optical system including at least one diffractive lens component, wherein the focus points of the beams formed by said converging element are located between said converging element and said compensating optical system.