Patent ID: 8314975
Filing Date: 2012-11-20
Classification: H04N

Abstract:
1. An optical scanning device comprising: a light source configured to emit a light flux; and a deflector configured to sinusoidally oscillate and thereby deflectively scan a surface to be scanned with the light flux emitted from the light source; and wherein the optical scanning device includes a first correction unit configured to divide the surface into a plurality of first areas in a main scanning direction and set a separate clock-pulse timing for each of the first areas, and correct a main-scanning position error, and generate first corrected data; wherein the scanning device includes a second correction unit configured to divide the surface into a plurality of second areas in the main scanning direction based on the first corrected data, set a separate clock-pulse timing for each of the second areas, and correct residual main-scanning error after being corrected by the first correction unit; and wherein the main-scanning position error is corrected by the second correction unit based on the first corrected data.