James C Sethares

Title: Innovations of James C Sethares

Introduction

James C Sethares is a notable inventor based in Burlington, MA (US). He has made significant contributions to the field of surface acoustic wave technology, holding two patents that showcase his innovative approach to testing and analyzing these systems. His work has implications in various applications, particularly in the realm of nondestructive testing.

Latest Patents

Sethares' latest patents include a method for testing and analyzing surface acoustic wave interdigital transducers. This method involves observing electro-optic changes in a layer of liquid crystals, which are produced by electric fields resulting from an electrical potential applied to the transducer. The display cell, which comprises a liquid crystal layer covered with a gold-coated glass coverplate, is fabricated on the surface of the SAW substrate under test. The assembled display cell is positioned for viewing under a microscope equipped for vertical illumination. The electro-optic effects produced in the liquid crystal by the electric field effects are analyzed and interpreted through this setup.

Another significant patent is for a surface acoustic wave rate sensor and position indicator. This invention achieves extremely sensitive velocity and position measurements using a surface acoustic wave resonator device. A standing wave field is established on a movable SAW propagation surface, and the movement of this surface causes periodic variations in the standing wave field amplitude. The frequency of these variations is directly related to the surface velocity, while the phase indicates the position of the surface. This technology has various implementations, including a rotatable aluminum cylinder and translatory planar SAW propagating surfaces.

Career Highlights

James C Sethares works for the United States of America as represented by the Secretary of the Air Force. His role involves applying his expertise in surface acoustic wave technology to advance the capabilities of the systems used by the Air Force. His innovative contributions have been recognized within the field, and he continues to push the boundaries of what is possible with SAW technology.

Collaborations

Sethares has collaborated with notable colleagues such as Daniel J Burns and Gerald G Sweet. These partnerships have allowed for the exchange of ideas and the development of advanced technologies in the field of surface acoustic waves.

Conclusion

James C Sethares is a distinguished inventor whose work in surface acoustic wave technology has led to significant advancements in testing and measurement techniques. His patents reflect a deep understanding of the complexities involved in this field, and his contributions continue to