Patent ID: 8289601
Filing Date: 2012-10-16
Classification: B41J,G02B

Abstract:
1. An optical scanning device to be employed in an image forming apparatus comprising a photosensitive member that is scanned with a plurality of beams, said optical scanning device comprising: a plurality of light emitting elements that are arranged in an area of a parallelogram, in a matrix of M rows and N columns, all the light emitting elements emitting beams; and a deflector for deflecting the beams emitted from the light emitting elements; wherein the plurality of light emitting elements are arranged such that the beam emitted from the light emitting element located in the mth row and the nth column and the beam emitted from the light emitting element located in the (m−1)th row and the (n+1)th column are scanned on adjacent scanning lines on the photosensitive member; and wherein a scanning line on which the beam emitted from the light emitting element in the first row and the first column is scanned at a time of the (L+1)th scanning motion of the light emitting elements is located in an area from a scanning line on which the beam emitted from the light emitting element in the first row and the first column is scanned at a time of the Lth scanning motion of the light emitting elements to a scanning line on which the beam emitted from the light emitting element in the Mth row and the Nth column is scanned at a time of the Lth scanning motion of the light emitting elements, wherein M and N each represents an integer, M<N, a product of M×N represents the plurality of light emitting elements, m represents an integer from 2 to M, n represents an integer from 1 to N, and L represents an integer.