Eastman-kodak Company

Nea Y Woo

David D Kessler

John C Boutet

Thomas A Mackin

Anthony R Lubinsky

Seung H Baek

Robert W Kulpinski

James F Owen

Edward J Muka

William F Garbe

A method and apparatus for operating a laser diode array in a laser thermal printer, wherein the laser diodes are formed on a common substrate, includes: generating digital image data signals for the individual diodes in the array; generating correction signals for each diode in the array, the correction signals being generated by weighting selected digital image data signals; summing the weighted correction signals with the digital image data signals for each diode in the array to produce control signals; employing the control signals to produce a driving current for each diode in the array; applying the driving currents to the diodes in the array.

Thermal cross-talk compensating current driver for laser diode array

Light collector for stimulable phosphor imaging apparatus

A driver is disclosed for a diode laser for use in a laser printer. The driver current is controlled in accordance with a digital video signal. In order to provide an effective means of converting the video signal to the desired driver current, the digital signal is provided to a plurlality of current-weighted subdrivers. In order to overcome the effects of optical feedback in an apparatus, signals to the subdrivers are composite signals formed from a high frequency carrier and the video signal.

Driver for a diode laser

Laser beam noise reducing apparatus includes an acoustooptic cell which receives a noisy input laser light beam and produces an undiffracted or zero-order light beam and a diffracted beam in response to an RF signal at a predetermined frequency. The zero-order beam is applied to a utilization device which produces an information modulated output beam at an image zone. The zero-order beam at the output of the acoustooptic cell is sampled and AC and DC component signals are produced which are functions of fast and slow time varying changes, respectively, in the intensity of the zero-order beam. The output beam from the utilization device is sampled when it is unmodulated and a DC reference signal which represents the intensity of the DC component at the image zone is produced. The AC and DC component signals and the reference signal are combined and used to control the amplitude of the RF signal to reduce noise in the beam at the image zone.

Laser light beam noise reducing apparatus

Growing community of inventors

Rochester, NY, United States of America

Nea Y Woo