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Light beam scanning device that performs high-accuracy light amount control, method of controlling the device, storage medium, and image forming apparatus
Light beam scanning device that performs high-accuracy light amount control, method of controlling the device, storage medium, and image forming apparatus
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机译：执行高精度光量控制的光束扫描装置，该装置的控制方法，存储介质以及图像形成装置
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摘要
A light beam scanning device which is capable of performing high-accuracy light amount control without complicated control even when the device includes a laser diode having non-linear I-L characteristics. Gain circuits set the amount of light to be emitted from the laser diode. A PD circuit board detects the amount of the emitted light. A laser controller controls the amount of the emitted light by adjusting drive current applied to the laser diode based on a detection output from the PD circuit board. A CPU corrects data for correcting the drive current. The CPU decides a light amount correction range for correcting the light amount based on the correction data, calculates the slope of the I-L characteristics in the light amount correction range based on light amounts at two points within the light amount correction range and drive currents associated with the respective light amounts, and corrects the correction data using the calculated slope.
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