Patent ID: 8120633
Filing Date: 2012-02-21
Classification: G02B,G03G

Abstract:
1. A scanning optical apparatus, comprising: a light source configured to output a light beam in accordance with inputted image data; a deflection unit configured to deflect the light beam so that the light beam scans an image carrier; a detection unit positioned at a scanning line for detecting the light beam; a specifying unit configured to specify an exposure position on the image carrier in a scanning direction based on a detection timing at which the detection unit detects the light beam; a memory for storing correction data which corrects both of a time duration for which the light beam is continuously outputted to form one pixel and a light amount of the light beam, each of such correction data corresponding to an amount of focus error at exposure positions on the image carrier in the scanning direction; and a correction unit configured to read out the correction data corresponding to the exposure position specified by the specifying unit from the memory and to correct the time duration for which the light beam is continuously outputted to form the pixel and the light amount of the light beam based on the read out correction data.