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OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS

  • US 20080055672A1
  • Filed: 08/27/2007
  • Published: 03/06/2008
  • Est. Priority Date: 09/04/2006
  • Status: Abandoned Application
First Claim
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1. An optical scanning device comprising:

  • a light source that includes a two-dimensional array of light-emitting units; and

    an optical system that scans a target surface with light beams from the light source, whereinthe two-dimensional array include N light-emitting arrays each formed of M light-emitting units arranged equally spaced along a first direction, the first direction tilting from a main scanning direction at an angle α

    toward a sub-scanning direction,the light-emitting arrays are equally spaced in the sub-scanning direction,a space ds2 between adjacent light-emitting arrays with respect to the sub-scanning direction satisfies ds2=ds1×

    M where ds1 is a positional difference in the sub-scanning direction between light-emitting units adjacent each other in the main scanning direction in the light-emitting array orthographically-projected on a virtual line extending in the sub-scanning direction, andthe angle α

    satisfies α

    =sin

    1
    ((ds2/d1)/M) where d1 is a space between adjacent light-emitting units in the light-emitting array with respect to the first direction.

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