Thomas J Grycewicz

Title: Innovations of Thomas J Grycewicz

Introduction

Thomas J Grycewicz is a notable inventor based in Belmont, MA (US). He has made significant contributions to the field of optical correlators, particularly in applications related to fingerprint recognition and precision positioning systems. With a total of 5 patents to his name, Grycewicz's work has advanced the capabilities of various technologies.

Latest Patents

One of his latest patents focuses on techniques to improve binary joint transform correlators, specifically for fingerprint recognition. This innovation introduces a Fourier plane binarization threshold that alternates between even and odd rows, effectively reducing noise in the output plane. This improvement enhances the discrimination between matched and unmatched prints. By periodically correlating with a known standard input and normalizing the output peak intensity, Grycewicz prevents performance drift that could degrade fingerprint recognition. His experimental results demonstrate a significant false pass improvement from 6.95% to 0.076% at a false alarm rate of 0.1 percent.

Another notable patent is the lensless joint transform optical correlator designed for precision industrial applications. This invention optically determines the relative position of two pinholes placed in parallel arms of a Mach-Zehnder interferometer. The resulting Fraunhaufer diffraction patterns combine to form a joint power spectrum signal in the joint transform plane. The interference of the two pinhole signals creates an encoded lens comprising a Fresnel zone, which magnifies the input pinhole displacement by a factor of ten. This enhancement is particularly useful in precision positioning servo systems for mask alignment.

Career Highlights

Grycewicz works for the United States of America as represented by the Secretary of the Air Force. His role involves applying his expertise in optical technologies to advance military and industrial applications. His innovative approaches have garnered attention and respect within the scientific community.

Collaborations

Throughout his career, Grycewicz has collaborated with notable colleagues, including Jehad Khoury and Charles L Woods. These partnerships have contributed to the development of his groundbreaking patents and have fostered a collaborative environment for innovation.

Conclusion

Thomas J Grycewicz is a distinguished inventor whose work in optical correlators has led to significant advancements in technology. His contributions to fingerprint recognition and precision positioning systems highlight his innovative spirit and dedication to improving technological applications.