Specialisation:

Optical Metrology; Coherent Optics

Major Professional Contributions:

Professional Contributions Over the past five decades, Prof. Sirohi has been at the forefront of Science and Engineering education, research and development, leadership and human resource generation. He is a world renowned, highly cited researcher (h-index 30) in the field of Optical Engineering. He has developed several instruments that are widely used in academia, industries and national laboratories (e.g., ISRO, IRDE). He has the unique distinction of being the Director, IIT Delhi, as well as a student in its first graduating class. Under his leadership, IIT Delhi moved from a low ranking to the top engineering institution in India (India Today ranking 2005). He has held leadership positions as Vice-Chancellor of State and Private Universities, continually emphasizing research and innovation. Prof. Sirohi is internationally recognized for his contributions in Optical Engineering. He has 312 papers in reputed journals and proceedings, 145 papers in conferences, 47 invited lectures and has authored/co-authored/edited 14 books. He is a Fellow of Optical Society of America, National Academy of Engineering, International Society for Optical Engineering (SPIE), Optical Society of India, National Academy of Sciences India and Instrument Society of India. He was on the editorial boards of several national and international journals. Currently, he is Senior Editor for an international journal ‘Optical Engineering’ published by SPIE, USA. Prof. Sirohi is an active researcher and has made seminal contributions in Optical Metrology. Notable examples are: 1. The first demonstration of the dependence of optical constants on surface roughness. 2. Numerous speckle-based techniques for the measurement of displacement, strain, angles, contouring and multiplexing. 3. Fringe control techniques to visualize defects (used in commercial Holographic Non-Destructive Testing equipment). 4. A fast and efficient algorithm for the generation of holograms to test aspherical optics. 5. The most accurate techniques to measure the focal lengths and radii of curvature of surfaces. 6. A grating heterodyne technique for the study of fluctuations on liquid surfaces (ripplons), which has been utilized to measure extremely slow flows encountered during crystal growth in space. 7. The first application of interferometry for the generation of an array of laser spots of almost equal intensity. 8. His current interest lies in using low coherence interferometry for surface profiling. 9. His notable contribution is in shearography which has evolved as a non-destructive testing technique with a good throughput. The measurable impact of his contributions can be placed under the following. a. Creation of human resource: Prof. Sirohi has guided 25 Ph.D., 7 M.S. and numerous B.Tech./M.Tech. students. Many of these students hold important positions in academia, R&D laboratories and industries, thereby contributing to national development. b. His research work is well cited and some of the techniques developed by him are extensively used in research laboratories and industries. c. He custom designed instruments for the optical industry and R&D organizations, notably: Aerial Camera for DRDO, and holographic and electronic speckle pattern interferometers for ISRO. The development of Aerial Camera was a large national effort for creating expertise in a strategic area, leading to import substitution. d. He developed two ophthalmic instruments, which are manufactured and marketed by m/s Appasamy Associates, Chennai. This resulted in the availability of affordable instruments for ophthalmic examination. e. He developed test equipment for several applications, most notably, the equipment jointly developed with ISRO Bangalore for testing of honeycomb structures and pressure vessels. This work was chosen for NRDC award in 2003. f. He is instrumental in establishing and nurturing several small-scale optics companies. Prof. Sirohi has also played a leadership role in numerous societies, boards and governing bodies. He was President of both Optical Society of India and Instrument Society of India. He was the Chairman, Board of Governors of NSIT Delhi and Chairman, Governing Body of National Council of Science Museums. He was a member of Research Advisory Council, and Executive Council NPL Delhi; Research Council, CSIO Chandigarh; Planning Board of Bharathidasan University; Executive Council of Central University, Tripura and on the Governing Bodies and Boards of many NITs. He has been on the editorial board of several optics' journals. Currently he is the Senior Editor of Optical Engineering, an international journal published by SPIE, Bellingham USA. He is also the Series Editor of a Series on Optics, Photonics and Optoelectronics published by Institute of Physics (IoP) UK. In brief, Prof. Sirohi has served the cause of education, research and technology development throughout his career. He has been working with dedication to improve technical education in the country, and has contributed considerably in the planning and management of scientific activities particularly those related to Optical Science and Engineering.

Consultancy Areas:

Sector Associated With:

Academia

Sectors Interested to Offer Service:

Educational / Academic institutions, Industry (Private), Industry (PSUs), R&D Organizations, Government (including funding agencies)

Professional Experience

Professor IIT Madras 1979 till 2000 Director IIT Delhi 2000 till 2005 Vice Chancellor Barkatullah University< Bhopal and several Private Universities Chairman, BOG, Netaji Subash Institute of Technology, Delhi and Chairman, GB, National Council of Science Museums, Kolkata BRLGB Chair Professor Tezpur University.

Keywords

Optical Metrology, Holography, Speckle Phenomenon,Optical Engineering, Laser Applications.