William J Cottrell

Title: The Innovations of William J Cottrell

Introduction

William J Cottrell is a notable inventor based in Essex Junction, Vermont. He holds a total of six patents, showcasing his contributions to the field of optical engineering. His work primarily focuses on advanced interferometry techniques, which have significant applications in various scientific and industrial domains.

Latest Patents

One of Cottrell's latest patents is the Common-path point-diffraction phase-shifting interferometer. This innovative device utilizes a half wave plate with a diffractive element, such as a pinhole. A coherent, polarized light source generates both a reference beam and an object beam. The reference beam features a nearly spherical wavefront, while each beam possesses a different polarization state. The beams are independently phase modulated by a polarization-sensitive phase modulator, which shifts the phase based on the applied voltage and the polarization state of the incident light. A polarizer ensures that both beams have the same polarization state and equal intensities, allowing them to interfere and create an interferogram with near unity contrast.

Career Highlights

Cottrell has made significant strides in his career, working with companies such as Interphase Technologies, Inc. and Teracomm Research, Inc. His expertise in optical systems has led to advancements in measurement techniques and imaging systems.

Collaborations

Throughout his career, Cottrell has collaborated with notable individuals, including Thomas George Ference and Kenneth A Puzey. These collaborations have contributed to the development of innovative technologies in the field of optics.

Conclusion

William J Cottrell's contributions to optical engineering through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence advancements in interferometry and optical measurement techniques.