Patent ID: 6642492
Filing Date: 2003-11-04
Classification: B41J,G06K,H04N

Abstract:
An optical printer which forms images on a photosensitive body by the exposure of the photosensitive body, comprising:an optical head for exposing the photosensitive body, the optical head including a light source, an optical shutter to control transmission and blockage of light from said light source, and a plurality of photosensors including a first photosensor to detect light, which was irradiated from the light source but has not yet passed through said optical shutter, and output a corresponding signal; a reference value storing circuit for storing a value of a voltage; and a first comparison and control circuit for comparing the voltage of the signal outputted from said first photosensor with the value stored in said reference value storing circuit to control a quantity of light from said light source; wherein said photosensitive body is exposed while the first comparison and control circuit performs said comparison and said control of light quantity.