James D Perea

Title: The Innovations of James D. Perea in Heterodyne Interferometry

Introduction

James D. Perea, a prominent inventor based in Alexandria, VA, has made significant contributions to the field of optical engineering and measurement technologies. With a total of five patents to his name, his work has focused on advanced methods for measuring surface motions and vibrations using heterodyne interferometry. His innovative approaches have applications across various industries, particularly in the military and research sectors.

Latest Patents

One of Perea's latest patents is the "Method for Phase Resolved Heterodyne Shearographic Measurements." This invention introduces a phase-resolved heterodyne shearing interferometer designed for high-rate, whole-field observations of transient surface motion. It employs polarization multiplexing and multiple carrier frequencies to effectively separate each segment of a shearing Mach-Zehnder interferometer. The post-processing routines developed within this patent allow for the recombination of segments by extracting scattered object phase information from Doppler shifted intermediate carrier frequencies, providing vital quantitative relative phase changes. This development enables the creation of variable shear, phase-resolved shearographic fringe patterns without the need for temporal or spatial phase shifting.

Another significant innovation by Perea is described in his patent titled "Apparatus for a Dynamic Multi-Axis Heterodyne Interferometric Vibrometer." This invention reveals a multi-axis heterodyne interferometer that facilitates the observation of five degrees of dynamic freedom utilizing a single illumination source. The design incorporates polarization and frequency multiplexing techniques to simultaneously capture and differentiate the image and Fourier planes after coherent illumination scatters from a dynamic surface. The distinct optical configurations help generate essential information regarding an object's in-plane translation, out-of-plane rotation, and out-of-plane displacement.

Career Highlights

James D. Perea serves as an inventor for the United States of America, as represented by the Secretary of the Army. His work has been pivotal in advancing optical measurement technologies, contributing to both military and civilian applications. His expertise in heterodyne interferometry has established him as a key player in the innovation of measurement techniques.

Collaborations

Throughout his career, Perea has worked alongside dedicated professionals, including his coworker Bradley W. Libbey. Their collaborative efforts have furthered the development of innovative optical technologies and instrumentation.

Conclusion

James D. Perea's innovative contributions to the field of heterodyne interferometry underscore the importance of advanced measurement techniques in modern technology. His patents highlight a commitment to improving observational capabilities and the understanding of dynamic systems. As he continues his work within the United States Army, Perea's inventions will undoubtedly have a lasting impact on both military operations and industrial applications.