Jian Shi

Title: Jian Shi and Precision Optical Measurement Innovations.

Introduction

Jian Shi is an inventor associated with Harbin Institute of Technology in Harbin, China. His work focuses on precision measurement and optical engineering, particularly methods and devices designed to improve the accuracy, resolution, and stability of angle measurement. He is credited with 2 patents.

Latest Patents

Shi’s recent patent work includes two inventions that advance autocollimation and high-precision optical measurement.

“Two-Dimensional Photoelectric Autocollimation Method and Device Based on Wavefront Measurement and Correction” adds wavefront measurement and correction to a traditional autocollimator. The method uses wavefront distortion information and a deformable mirror to compensate for phase distortion in the beam. This helps correct optical-system aberrations, improve image quality and spot-positioning accuracy, and increase angle-measurement precision. The disclosure also describes improved resistance to environmental disturbances, with the stated goal of achieving nanoradian-order resolution and sub-microradian-order measurement accuracy.

“High-Stability Nano-Radian-Order Angle Measuring Method and Device Based on Drift Value Feedback” uses two measuring beams and sensor images to determine an object’s pitch and yaw angles relative to an optical axis. Its design combines a collimator objective set and linear-array CCD sensors with a four-quadrant position detector and steering mirrors. Feedback based on measured drift helps stabilize the system, while the optical arrangement is intended to support a broad measurement range, high precision, and rapid response.

Career Highlights

Shi’s listed inventions address key challenges in precision optical instruments: aberration, beam drift, environmental interference, and the trade-off between measurement range and angular resolution. Together, the disclosures describe approaches for improving the reliability and performance of autocollimators and related angle-measurement systems.

Collaborations

Shi is associated with Harbin Institute of Technology. The provided information also identifies Yang Yu and Jiubin Tan as coworkers.

Conclusion

Jian Shi’s patent work at Harbin Institute of Technology centers on more accurate and stable optical angle measurement, combining wavefront correction and drift feedback to address limitations in conventional autocollimator systems.