Snapshot spectral imaging using image replication and birefringent interferometry : principles and applications
Abstract
This thesis explores the image-replicating imaging spectrometer (IRIS). This relatively
recent invention is a two-dimensional, snapshot spectral-imaging technology, capable
of recording the spectral and spatial data from a scene instantaneously. Whereas
conventional spectral-imaging technologies require multiple detector frames to record
the entire data set, IRIS is able to record the data set in a single frame, a capability
which is useful for highly dynamic scenes.
The IRIS concept and the design of IRIS systems are explained in detail, and constraints
on the performance of IRIS are determined. Practical issue in the use of IRIS
systems are identi ed and solutions are identi ed and appraised. Some applications of
IRIS are also shown, demonstrating its viability as a spectral imaging technology.
Novel aspects of this work include the re nement of the IRIS design, demonstration
of a registration algorithm for IRIS, designs for achromatic Wollaston prisms, a comparison
of the IRIS technology with conventional spectral imaging technologies, and the
application of IRIS to practical problems.