Optical beam scanning apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorHidetoshi Shinada
Life of this patent
Estimating the term…
Abstract
An optical beam scanning apparatus which includes: an optical modulator which emits an optical beam in a direction corresponding to the frequency of an inputted signal; scanning device for scanning the optical beam; a scanning lens; a storage device which stores data for correcting the displacement of the optical beam passing through the scanning lens caused by an aberration of the scanning lens for each scanning position of the optical beam; and a device which, based on the data stored in the storage device, alters the frequency of the signal to be inputted to the optical modulator for each scanning position of the optical beam so as to correct the displacement of the optical beam caused by the aberration of the scanning lens.
Claims11
An optical beam scanning apparatus comprising:
- an optical modulator which emits an incident optical beam in a direction corresponding to a frequency of an input signal;
- scanning means for scanning the optical beam emitted from said optical modulator;
- a scanning lens through which the optical beam scanned by said scanning means passes;
- storage means for storing data, for each of a plurality of scanning positions, for correcting displacement of the optical beam passing through the scanning lens, said displacement being caused by aberration of said scanning lens;
- and
- alteration means for altering, based on the data stored in said storage means, the frequency of the signal to be inputted to said optical modulator for each of said scanning positions of the optical beam so as to correct the displacement of the optical beam caused by aberration of the scanning lens.
Dependencies are inferred from the claim text.