Changfei Yan

Title: The Innovations of Inventor Changfei Yan

Introduction

Changfei Yan, based in Shanghai, China, has made significant contributions to the field of optical engineering with his inventive spirit. Holding two patents, Yan has focused on enhancing magneto-optic Kerr effect metrology systems, an area that plays a crucial role in advanced measurements and technologies.

Latest Patents

Yan's latest inventions include a groundbreaking reflective compact lens designed for magneto-optic Kerr effect metrology systems. This innovative design uses a Cassegrain or quasi-Cassegrain structure objective lens, featuring a primary concave mirror with a wider diameter than the secondary mirror. This configuration allows for the efficient transmission of a laser beam through a well-defined aperture toward the secondary mirror. Additionally, his work on magneto-optic Kerr effect metrology systems involves directing a laser beam through either a transmissive or reflective axicon telescope. This unique approach employs axicon lenses to transform a Gaussian beam profile into a hollowed laser ring, optimizing measurement capabilities.

Career Highlights

Changfei Yan is currently affiliated with Kla Corporation, where he plays an essential role in advancing optical technologies. His inventive efforts have earned him recognition in a rapidly evolving field, particularly in applications that rely on precision metrology.

Collaborations

Throughout his career, Yan has collaborated with notable colleagues such as Jun Wang and David Y Wang. These partnerships have been instrumental in fostering innovative ideas and refining techniques within their work environment.

Conclusion

In conclusion, Changfei Yan's contributions to the field of optical engineering are marked by his two patents focused on magneto-optic Kerr effect metrology systems. His innovative designs continue to shape the landscape of optical measurement technologies, making significant strides in their effectiveness and application.