Stuart D Perry

Title: The Innovations of Stuart D. Perry

Introduction

Stuart D. Perry is a notable inventor based in Rochester, NY (US), recognized for his contributions to optical disc technology. With a total of 6 patents to his name, Perry has made significant advancements in the field, particularly in the areas of focusing and tracking mechanisms for optical discs.

Latest Patents

One of Perry's latest patents is the "Compensation apparatus for radial and vertical runout of an optical disc." This innovative apparatus compensates for radial and vertical runout using an actuator equipped with a lens that focuses a laser beam. The focus and tracking currents control the lens's position in both vertical and radial directions. The apparatus effectively focuses the actuator lens along at least one revolution of a track on an optical disc, producing lens position signals. Structures are provided that respond to these signals to produce the frequency content of surface height and track deviations of the optical disc using a frequency transform technique. The frequency content is stored, and a signal representing the focusing and tracking actuator currents is generated. In response to these signals, the lens position is controlled, thereby reducing focusing and tracking errors.

Another significant patent is the "Digital compensator for controlling a servo to correct the value of a." This digital compensator is designed to control a servomechanism, such as the focus servo of an optical disk drive. The compensator waits one full sample period before applying the correction calculated for the preceding sample. Notably, it does not use the present input sample in its calculation of the current output sample. The method involves receiving a first input sample at time t₁, a second input sample at time t₂, and computing a first output in response to the first input sample at time t₂. This innovative approach does not require a present input sample to calculate the current output.

Career Highlights

Stuart D. Perry has had a distinguished career at Eastman Kodak Company, where he has contributed to various projects and innovations in optical technology. His work has significantly impacted the efficiency and accuracy of optical disc drives.

Collaborations

Throughout his career, Perry has collaborated with notable colleagues, including Joseph F. Revelli, Jr. and Douglas G. Stinson. These collaborations have fostered an environment of innovation and have led to the development of groundbreaking technologies in the field.

Conclusion