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Computer Generated Holograms for optical testing -- a review
供稿:李大海  责任编辑:陈慧媛  时间:2016-09-28   阅读:4460次  【打印】

讲座人:Dr. Chunyu Zhao Arizona Optical Metrology LLC, United States.

时  间:2016929 下午16:00

地  点:基础教学楼A 110

 

Dr. Chunyu Zhao is Co-founder and President of Arizona Optical Metrology LLC (www.cghnulls.com), a company that provides computer generated holograms (CGH) for testing aspheric surfaces, as well as a stitching software package called ZBR. He is also an adjunct faculty member at the University of Arizona, College of Optical Sciences. He got B.S. in physics and B.E. in mechanical engineering in 1993 from Tsinghua University, Beijing, China, and M.S. in 1999 and PhD in 2002, both in optical engineering from the University of Arizona. Dr. Zhao has over 15 years’ experience in design, development, and build of interferometric systems for testing large aspheric optical surfaces. Dr. Zhao has authored/co-authored about 70 technical papers and presented dozens of talks at international conferences.


Abstract

Computer Generated Hologram or CGH, in combination with a laser interferometer, is the defacto standard for precision measurement of aspheric surfaces or wavefronts. In this talk he first give a review of the historical development of the CGH technology, following the time line from the first publication on the concept of holography, to the creations of the first laser holograms, to the idea and realizations of holograms generated by computer, up to the research, development and application of the CGH technology for optical testing. As the technology gets widely accepted, more innovations happened in areas of CGH fabrication pushing the technology envelope, as well as creative use of the CGH to do the previously unthinkable. He will give a few examples in each area.