Piston phase measurements to accelerate image reconstruction in multi-aperture systems
Date of Award
M.S. in Electro-Optics
Advisor: Paul McManamon
Multi-aperture imaging has been used to receive high resolution images from arrays of sub-apertures. The use of sub-aperture arrays allows for more compact optical systems and enables conformal aperture imaging. Images collected from these arrays are processed to obtain the high resolution image. A High resolution image is created from an accurate representation of the pupil plane fields in each sub-aperture. Data processing to create an image is time consuming and computationally heavy. Compensating for the unknown piston phase error between the different sub-apertures is one of the more time consuming corrections required to process the image data into a single image. Sub-aperture phasing simulations are used to explore the processing of multi-aperture arrays. The data is processed for several sub-aperture arrays, including 2 and 3 in-line sub-aperture arrays, and hex 7 and 19 sub-aperture arrays. A scheme is proposed for measuring the piston phases in each sub-aperture. It is shown through numerical simulations that a system that measures the piston phase could significantly reduce the processing time required to phase the images from a multi aperture system into a single high resolution image.
Coherent radar, Image reconstruction, High resolution imaging Processing, Image processing Digital techniques
Copyright 2011, author
Kraczek, Jeffrey Read, "Piston phase measurements to accelerate image reconstruction in multi-aperture systems" (2011). Graduate Theses and Dissertations. 388.