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OSA | Living History

Parameswaran Hariharan

OSA Fellow Parameswaran Hariharan was well known for his work on photographic resolving power and was awarded the OSA Joseph Fraunhofer Award in 1989 for his pioneering scientific and engineering contributions to interferometry, laser speckle and holography.

Dr. Hariharan was the son of Prof. H. Parameswaran (H. P. Waran) of Presidency College and the son-in-law of Alladi Krishnaswamy Iyer. He was born on December 24, 1926.

He worked at the National Physical Laboratory (NPL), New Delhi from 1949 to 1951 and then at the National Research Council, Ottawa from 1951-1954. On returning to NPL, Dr. Hariharan received a PhD for his work on photographic resolving power. Subsequently, he held key posts at several scientific institutes and organizations and was also an honorary visiting professor at the University of Sydney.

Dr. Hariharan's research contributions include the design of a new three-beam interferometer, the double-passed Fabry-Perot interferometer, and the first practical radial-shear interferometer. He was also the first to apply digital phase-shifting techniques to holographic interferometry for measurements of vector displacements and strains. Dr. Hariharan has published more than 200 papers and has authored four books. He was the recipient of several awards, including the Thomas Young Medal of the Institute of Physics, London and the Walter Boas Medal of the Australian Institute of Physics.

Parameswaran Hariharan died on 30 July 2015, please see OSA's memorial entry.

Document Created: 7 Feb 2020
Last Updated: 7 Feb 2020