Modulation of Rectangular and Triangular Bar targets by Optical Systems using Hamming Filters

  • B.Rama Mohana Rao V.R. Siddhartha Engineering College, Vijayawada
  • V. Srinivas V.R. Siddhartha Engineering College, Vijayawada.
  • S.L. Goud Osmania University, Hyderabad
  • G.R.C. Reddy Regional Engineering College, Warangal
Keywords: Apodisation filters, Image modulation, Triangular bar targets, Incoherent imaging systems


The modulation in incoherent imaging systems for rectangular and triangular bar targets has been investigated using Harming apodisation filters. The results of contrast Md cutoff frequency responses have been reported with the help of certain profiles. Different apodisation parameters with different values have been used for the calculation of image modulation.

Author Biographies

B.Rama Mohana Rao, V.R. Siddhartha Engineering College, Vijayawada
Dr B Rama Mohana Rao did his MSc in Physics from Vlkram University in 1979, MPhil from Nagarjuna University in 1985 and PhD from Regional Engineeririg College, Warangal, in 1995. Since 1982, he has been working at Velagapudi Ramrkrishna Siddhrtha Engineering College, Vijaywada. His research interest is Fourier optics. He is a fellow member of School of Optics,
V. Srinivas, V.R. Siddhartha Engineering College, Vijayawada.
Dr Ch V Srlnlvas received his MSc from SV. University, Tirupati, in 1985 and PhD from Regional Engineering College, Warangal, in 1989. He completed a project on acoustical holography and image processing funded by DST, New Delhi. He joined VR Siddhartha, Engineering College. Vijaywada, in 1989. He has published about 30 research papers in international and national journals and authored about 20 popular science articles.
S.L. Goud, Osmania University, Hyderabad
Dr SL Goud did his PhD in Molecular Spectroscopy from Osmanik University, Hyderabad, in 1977. He is working as senior Lecturer at Osmania University. His current areas of research are Fourier optics, holography and medical physics. He has published and co-authored about 50 research papers, in these areas. He is fellow member of the School of Optics, Hrderabad, life-member of Society for Advancement of Solidstate Sciences, Hyderabad; Association Radiation Physid, Bombay and Indian Association of Physics Teachers, Kanpur.
G.R.C. Reddy, Regional Engineering College, Warangal
Dr GRC Reddy did his MSc (Tech) and PhD in 1976 and 1980, respectively from Regional Engineering College. Warangal. Currently, he is Professor of Physics at Regional Engineering  College where he has been working since 1980. His research interests include Fourier optics, holography, lens design, fiber optics and plastic optical fibers.

How to Cite
Rao, B., Srinivas, V., Goud, S., & Reddy, G. (2013). Modulation of Rectangular and Triangular Bar targets by Optical Systems using Hamming Filters. Defence Science Journal, 47(2), 217-223.
Electronics & Communication Systems