Dr. Robert A. Gonsalves
Professor Emeritus at
SPIE Involvement:
Fellow status | Conference Program Committee | Conference Co-Chair | Author
Profile Summary

Bob Gonsalves is an Emeritus Professor in the ECE Department at Tufts University. He received the BSEE at Tufts and the MS and Ph. D. from Northeastern University. He was a Professor at Northeastern for 20 years and spent another 20 years at Tufts. While at Tufts he received the Leibner Award for Distinguished Teaching and Advising and chaired the department for 6 years. His expertise is digital image processing, with applications in graphic arts, medicine, astronomy, and historical images. He is the founder and former President of Lexitek, Inc., which builds innovative optical products. An SPIE Fellow since 1987, he took sabbaticals at Stanford University, Zurich's Swiss Federal Institute of Technology and the University of Sydney in Australia.

In 1990 he used Phase Diversity, a method he invented in the 1970’s, to help NASA find a prescription for the flaw in the Hubble Space Telescope. More recently he was an advisor to NASA on the James Webb Space Telescope, which will use Phase Diversity to help align its segmented optics, consulted with Harvard-Smithsonian researchers on imaging exo-planets, and consulted with Lincoln Lab and AOA on Phase Diversity Imaging methods. His most recent research has been on Sequential Diversity Imaging. SDI uses sequential images from a video camera which has an AO system. The sequence of AO changes forms a natural set of phase diversities for adjacent frames of the camera. The concept could be used in any digital camera with an AO and a digital processor to perform image sharpening. No additional element, like a defocused image or a Shack-Hartman sensor, is required.

Professor Gonsalves is a former city official in Woburn, MA, where he was born. He still resides in Woburn - on a family compound on which he designed and built four homes, including a contemporary solar home.
Publications (11)

PROCEEDINGS ARTICLE | May 24, 2018
Proc. SPIE. 10677, Unconventional Optical Imaging
KEYWORDS: Mirrors, Stars, Space telescopes

PROCEEDINGS ARTICLE | July 21, 2014
Proc. SPIE. 9148, Adaptive Optics Systems IV
KEYWORDS: Point spread functions, Telescopes, Astronomy, Stars, Image segmentation, Adaptive optics, Exoplanets, Phase retrieval, Space telescopes, James Webb Space Telescope

PROCEEDINGS ARTICLE | June 15, 2006
Proc. SPIE. 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter
KEYWORDS: Microelectromechanical systems, Observatories, Speckle, Sensors, Scanners, Manufacturing, Coronagraphy, Ion beams, Absorbance, Beam propagation method

PROCEEDINGS ARTICLE | October 5, 2005
Proc. SPIE. 5905, Techniques and Instrumentation for Detection of Exoplanets II
KEYWORDS: Mirrors, Speckle, Manufacturing, Wavefronts, Coronagraphy, Ion beams, Photomasks, Planets, Spherical lenses, Device simulation

PROCEEDINGS ARTICLE | September 14, 2005
Proc. SPIE. 5905, Techniques and Instrumentation for Detection of Exoplanets II
KEYWORDS: Point spread functions, Telescopes, Sun, Imaging systems, Speckle, Image processing, Coronagraphy, Phase retrieval, Speckle pattern, Planets

SPIE Journal Paper | February 1, 2004
OE Vol. 43 Issue 02
KEYWORDS: Waveguides, Point spread functions, Wavefronts, Signal to noise ratio, Optical imaging, Image transmission, Image restoration, Fourier transforms, Wave propagation, Distortion

Showing 5 of 11 publications
Conference Committee Involvement (2)
Applications of Digital Image Processing XXIX
15 August 2006 | San Diego, California, United States
Applications of Digital Image Processing XVI
14 July 1993 | San Diego, CA, United States
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