Image forming apparatus equipped with image quality and adjusting device
AssigneeSharp Kabushiki Kaisha
InventorKazuya Hamaguchi
Life of this patent
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Abstract
A reflected-light amount detecting process is performed for white-standard and halftone-standard originals, respectively. Based on the analysis of resulting images, correct exposure voltages Vcl(WH) and Vcl(HT) are determined. When the thus determined voltage is applied to a copy lamp to turn it on, an AE sensor, receiving the light reflected from a corresponding original of the white-standard and halftone-standard originals, and outputs a corresponding output current Vae(WH) or Vae(HT). These output currents detected are used in combination with the correct exposure voltages Vcl(WH) and Vcl(HT), to calculate control constants for determining a control characteristic.
Claims4
An image forming apparatus comprising:
- a plurality of density samples having different levels of density;
- an exposure light source for exposing an original and said density samples to light;
- a reflected-light amount detecting means for detecting amounts of light reflected from said density samples, each of which is exposed to a respective predetermined exposure amount of light;
- a control-characteristic calculating means for calculating a control characteristic for determining an exposure light amount corresponding to a reflected-light amount, based on the amounts of light reflected from said density samples;
- and
- an exposure light amount controlling means for controlling the amount of light emitted from said exposure light source to the original, based on the control characteristic.
Dependencies are inferred from the claim text.