Mark L Rhoades

Title: **Mark L Rhoades: Innovating Optical Disk Technology**

Introduction

Mark L Rhoades is a notable inventor based in Longmont, Colorado, recognized for his contributions to optical disk data recording and retrieval systems. With two patents to his name, Rhoades has played a significant role in enhancing the precision and reliability of feedback servo systems.

Latest Patents

Rhoades' most recent patents focus on improving the functionality of feedback servo loops in optical disk systems. His first patent, titled "Focus Servo Loop Correction," addresses error correction in a feedback servo system. This innovation allows the feedback signal to be adjusted to zero when the head is at the optimal focus as identified by the peak in the laser monitoring diode. This correction is vital, as the alignment of the head positioning can be disrupted through use and transportation, leading to drift in loop circuit parameters. Rhoades' system senses the focus error and dynamically adjusts the gain of amplifiers in the feedback loop to ensure accuracy.

His second patent, "Focus Servo Loop Offset Compensation," further advances error compensation in feedback servo systems. Similar to the first patent, this invention aids in maintaining the head at the best focus position while correcting for misalignments and related errors. A correction signal is generated to cancel out the sensed value, allowing for effective operation even amid adverse conditions affecting the system.

Career Highlights

Mark Rhoades has built his career at the International Business Machines Corporation (IBM), a company renowned for its leadership in technology and innovation. His work has significantly influenced the development of optical technologies, particularly in the area of data storage and retrieval.

Collaborations

During his career, Rhoades has collaborated with talented peers, including Nelson K Arter and Mark G Call, who have contributed to his work in advancing the technology related to optical disk systems. These collaborations have fostered an environment of innovation, pushing the boundaries of existing technologies.

Conclusion

Mark L Rhoades is a pivotal figure in the field of optical disk technology, with his two patents reflecting his innovative spirit and technical expertise. His contributions to error correction in feedback servo systems have set a new standard in the industry, ensuring better performance and reliability in data recording and retrieval applications.