Po-Yi Chang

Title: **Innovative Contributions of Po-Yi Chang in Three-Dimensional Measurement Technology**

Introduction

Po-Yi Chang is a notable inventor based in Taichung, Taiwan, who has made significant strides in the field of measurement technology. With a total of three patents to his name, Chang's work primarily focuses on the development of advanced measurement devices that enhance precision and efficiency.

Latest Patents

Chang's most recent innovations include the "Three-Dimension Measurement Device and Operation Method Thereof" and the "Full-Range Image Detecting System and Method Thereof."

The **Three-Dimension Measurement Device and Operation Method Thereof** comprises a moving device, a projecting device, a surface-type image-capturing device, and a processing device. The moving device transports an object to various positions while the projecting device emits a first light onto the object. The surface-type image-capturing device detects the secondary light emitted from the object, creating phase images at each position. This innovation allows the processing device to perform a region-of-interest (ROI) operation, leading to a detailed calculation of the object's surface height distribution through a multi-step phase-shifting operation.

The **Full-Range Image Detecting System and Method Thereof** features a planar light source that projects a photo image with periodic variations onto an object. An image capturing device then reflects a photo image, while a light sensing device identifies coordinates at multiple measuring points for plane fitting. The processing unit analyzes phase variations and determines the relative and absolute altitudes of the surface profile, allowing for precise detection of the object's surface based on these coordinates.

Career Highlights

Po-Yi Chang has dedicated his career to innovating measurement technologies, working at the Industrial Technology Research Institute. His research has led to the enhancement of measurement accuracy and has broader implications for various fields, including materials science and engineering.

Collaborations

Throughout his career, Chang has collaborated with esteemed colleagues, including Chia-Hung Cho and Hau-Wei Wang. These collaborations have fostered an environment of innovation, allowing for the exchange of ideas and the development of groundbreaking technologies.

Conclusion

Po-Yi Chang's contributions to three-dimensional measurement technology exemplify the impact of innovation in enhancing precision devices. His patents reflect a commitment to advancing measurement techniques, making him a significant figure in the field of technology and research. With continued dedication, Chang is poised to influence future advancements and inspire upcoming inventors in the industry.