Optical scanning device, image scanning method and photographic processing device

An electrophotographic processing device, comprising:

• an optical scanning device which includes:
• a plurality of light sources for projecting light beams having different wavelengths respectively;
• a plurality of light beam modulation means for modulating the light beams projected from said plurality of light sources respectively according to image data;
• deflecting means for deflecting the light beams modulated by said plurality of light beam modulation means respectively in a main scanning direction;
• and
• optical means for converging a light beam from said deflecting means onto the photosensitive material,
• wherein said timing control means individually controls respective modulation timings for said plurality of light beam modulation means, said timing control means controlling a scanning clock in each of said plurality of light beam modulation means, and said timing control means controlling modulation timing in such a manner that a scanning clock having a smaller frequency is set for a light beam having a wavelength corresponding to a larger refractive index of said optical means;
• a developing section which performs a developing operation with respect to the photosensitive material which have gone through a printing process by said optical scanning device using a developing solution;
• and
• a drying section for drying the developing material having gone through the developing process by said developing section.

An optical scanning device which performs an exposing operation by scanning with respect to a photosensitive material being moved relatively, said optical scanning device, comprising:

• a plurality of light sources for projecting light beams respectively having different wavelengths;
• a plurality of light beam modulation means for modulating the light beams projected from respective light sources according to image data;
• timing control means for controlling a modulation timing for each of said plurality of light beam modulation means;
• deflecting means for deflecting the light beams modulated by said plurality of light beam modulation means in a main scanning direction;
• and
• optical means for converging a light beam from said deflecting means onto the photosensitive material,
• wherein said timing control means controls a modulation timing for each of said plurality of light beam modulation means individually, said timing control means controlling modulation timing in such a manner that an earlier scanning timing is set for a light beam having a wavelength corresponding to a larger refractive index of said optical means.

An optical scanning method for an optical scanning device which performs an exposing operation by scanning with respect to a photosensitive material being moved relatively, comprising the steps of:

• providing a plurality of light sources for projecting light beams having different wavelengths respectively;
• modulating the light beams projected from said plurality of light sources with a plurality of light beam modulation means respectively according to image data;
• controlling the modulation timing for each of said plurality of light beam modulation means with a timing control means that controls a scanning clock in each of said plurality of light beam modulation means;
• deflecting with a deflecting means said light beams modulated by said plurality of light beam modulation means respectively in a main scanning direction;
• and
• converging with optical means a light beam from said deflecting means onto the photosensitive material;
• wherein said timing control means controls modulation timing in such a manner that a scanning clock having a smaller frequency is set for a light beam having a wavelength corresponding to a larger refractive index of said optical means.

An optical scanning method for an optical scanning device which performs an exposing operation by scanning with respect to a photosensitive material being moved relatively, comprising the steps of:

• providing a plurality of light sources for projecting light beams having different wavelengths respectively;
• modulating the light beams projected from said plurality of light sources with a plurality of light beam modulation means respectively according to image data;
• controlling the modulation timing for each of said plurality of light beam modulation means with a timing control means;
• deflecting with a deflecting means said light beams modulated by said plurality of light beam modulation means respectively in a main scanning direction;
• and
• converging with optical means a light beam from said deflecting means onto the photosensitive material;
• wherein said timing control means controls modulation timing in such a manner that an earlier scanning timing is set for a light beam having a wavelength corresponding to a larger refractive index of said optical means.

An electrophotographic processing device, comprising:

• an optical scanning device which includes:
• a plurality of light sources for projecting light beams having different wavelengths respectively;
• a plurality of light beam modulation means for modulating the light beams projected from said plurality of light sources respectively according to image data;
• deflecting means for deflecting the light beams modulated by said plurality of light beam modulation means respectively in a main scanning direction;
• and
• optical means for converging a light beam from said deflecting means onto the photosensitive material,
• wherein said timing control means individually controls respective modulation timings for said plurality of light beam modulation means, said timing control means controlling modulation timing in such a manner that an earlier scanning timing is set for a light beam having a wavelength corresponding to a larger refractive index of said optical means;
• a developing section which performs a developing operation with respect tot he photosensitive material which have gone through a printing process by said optical scanning device using a developing solution;
• and
• a drying section for drying the developing material having gone through the developing process by said developing section.