Weijian Wang

Title: **Innovations of Weijian Wang: Pioneering Optical Imaging Technologies**

Introduction

Weijian Wang, an inventive mind based in San Jose, CA, has made significant contributions to the field of optical imaging with his groundbreaking patents. With a total of three patents to his name, his work spans innovative methods and apparatuses that enhance imaging systems, particularly in the realm of dark-field imaging.

Latest Patents

Among Weijian Wang's latest patents, one noteworthy invention is the **Method and Apparatus for Determining Best Focus Using Dark-Field Imaging**. This invention describes a sophisticated method for identifying the optimal focus position of an object relative to a reference position in a dark-field optical imaging system. The technique incorporates varying focus positions to generate dark-field images, from which average intensity and variance are assessed. Using these metrics, contrast values are calculated and a Lorentzian function is applied to determine the focus position that yields the maximum contrast value.

Another significant patent is the **Apparatus for and Method of Reducing or Eliminating Interference Effects in a Light Tunnel Illuminator**. This innovation features a unique design of a light tunnel—either hollow or solid—that includes a chamfered edge. This design effectively alters the reflective properties near the output end, thereby minimizing edge ringing. It is an important advancement for applications requiring high-irradiance light pulses, where traditional interference-elimination methods may be inadequate.

Career Highlights

Wang has an impressive career history, having held positions at **Ultratech Stepper, Inc.** and **Ultratech, Inc.**, where he applied his expertise in optical technologies. His role in these companies has allowed him to push the boundaries of imaging systems and contribute to practical implementations of his patented inventions.

Collaborations

Throughout his career, Weijian Wang has collaborated with talented individuals, including Andrew M. Hawryluk and David G. Stites. These collaborations have been pivotal in refining his inventions and ensuring their applicability in various industry settings.

Conclusion

Weijian Wang's contributions to optical imaging technology have positioned him as a prominent figure in the field of inventions. His innovative patents not only advance scientific understanding but also pave the way for enhanced imaging practices in multiple applications. As technology continues to evolve, the impact of his work is likely to be felt for many years to come.