Patent ID: 6208366
Filing Date: 2001-03-27
Classification: B41J

Abstract:
An optical head having a function of detecting positional displacement of a photosensitive member, comprising:a latent image forming light emitting element array for irradiating light upon said photosensitive member for forming an electrostatic latent image on said photosensitive member;a position detecting light emitting element array for irradiating light to be used for detection of the position of an end portion of said photosensitive member;a position detector for detecting the position of the end portion of said photosensitive member from the light emitted from said position detecting light emitting element array;a rod lens array for said latent image forming light emitting element array having a first focal length; anda rod lens array for said position detecting light emitting element array having a second focal length longer than the first focal length.