Patent ID: 7375868

Claim:
An image scanning apparatus comprising: a spatial light modulator for diffracting light beams having different wavelengths into relevant modes; an iris for limiting the light beams of modes except a mode of 0 th -order among the modes diffracted by the spatial light modulator module; a plurality of light sources for generating light beams of different visible wavelengths; a first lens for collimating a green light beam generated by one of said plurality of light sources; second and third lenses for collimating red and blue light beams generated by respective ones of the plurality of light sources; a first wavelength selection filter for passing the green light beam input from the first lens and perpendicularly reflecting the red light beam input from the second lens; a second wavelength selection filter for passing the green and red light beams input from the first wavelength selection filter and perpendicularly reflecting the blue light beam input from the third lens; a first diffusion lens for diffusing the green, red, and blue light beams input from the second wavelength selection filter; collimation and convergence lenses, which are disposed between the first diffusion lens and the spatial light modulator, forms a stripe pattern of the green, red, and blue light beams, which are input from the first diffusion lens, in a direction perpendicular to the light beam traveling direction, and outputs the stripe pattern to the spatial light modulator, and a scan minor for reflecting the light beams input from the spatial light modulator into a direction of the iris.