Yan Cheng

Title: Innovations by Yan Cheng

Introduction

Yan Cheng is an accomplished inventor based in San Jose, California. He has made significant contributions to the field of imaging systems and detection technologies. With a total of two patents to his name, Cheng's work focuses on enhancing leak detection and interferometric measurement systems.

Latest Patents

One of Yan Cheng's latest patents is an imaging system for leak detection. This innovative system utilizes schlieren imaging to locate and characterize the flow of pressurized gas that has a refractive index different from that of ambient air. The system comprises a collimated light source, a knife-edge spatial filter, and a 4F telescopic imaging system. This setup allows for the creation of images of devices under test (DUT) that are pressurized and monitored for leaks. When a leak occurs, contrast variations in the monitored plane illustrate the presence, location, and characteristics of the leak. This technology is particularly useful for evaluating waterproof or leakproof mobile devices, enabling visual identification of leak points.

Another notable patent by Cheng is the interferometric waviness detection system. This system includes a beam splitter that receives a collimated light signal and splits it into two separate light signals. The first and second mirrors reflect these signals along different paths, with the second signal passing through a transparent material. A 2D photosensor array then captures the merged reflected signals, generating an interference fringe pattern. A non-sinusoidal interference fringe pattern indicates geometrical variations between the wavefronts of the two reflected light signals, providing valuable data for measurement applications.

Career Highlights

Yan Cheng is currently employed at Kimball Electronics Indiana, Inc., where he continues to develop innovative technologies. His work has garnered attention for its practical applications in various industries, particularly in enhancing product reliability and performance.

Collaborations

Cheng collaborates with talented colleagues, including Sangtaek Kim and Paul Brunemeier, who contribute to the innovative environment at Kimball Electronics.

Conclusion

Yan Cheng's contributions to imaging systems and detection technologies demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of complex engineering challenges and a drive to create solutions that enhance product reliability.