Optical Correlators
 
High speed pattern recognition using
coherent light
Pattern recognition is an important part of
image analysis. An optical correlator is an
automated system that rapidly assesses the
features of an observed image (size, shape,
brightness, orientation, position, etc.),
classifies the results, and makes a decision
based on those results. An optical
correlator is very different from a standard
digital image processor. An optical
correlator processes full images in parallel
using a laser and the inherent optical
Fourier Transform property of lenses to
extract information of interest. With the
advent of very high resolution Spatial Light
Modulators massive digital processors can be
replaced with compact optical systems.
Boulder Nonlinear Systems (BNS) has been a
leader in the development of optical
correlators and enabling high frame rate SLM
components. In addition, BNS has delivered
correlators for diverse applications, such
as target tracking and identification, GPS
data processing, bio-remediation and
agricultural inspection. The resulting
re-programmable electro-optic processing
platform can act as a real-time data
compression engine, an intelligent event
alert system, or an on-the-fly data
classification tool.
BNS PUBLICATIONS
Optical correlator using four kilohertz
analog spatial light modulators
Teresa Ewing, Steve Serati and Kipp Bauchert,
Proc. SPIE, 5437, p. 123-133 (Apr 2004)
Data flow architecture for high-speed
optical processors
Kipp Bauchert and Steve Serati, Proc. SPIE,
3386, pp.50-58 (Apr 1998)
Complex phase/amplitude spatial light
modulator advances and use in a
multispectral optical correlator
Kipp Bauchert, Steven Serati, Gary
Sharp, Douglas McKnight, Proc. SPIE, 3073,
pp. 170-177 (Mar 1997)
High speed compact optical correlator design
and implementation
Richard Turner, Kristina Johnson and Steve
Serati, "Design Issues in Optical
Processing", Editor: John Lee, pp 169 (1995)
Programmable 128 x 128 ferroelectric liquid
crystal spatial light modulator compact
correlator
Steven Serati, Teresa Ewing, Roylnn Serati,
Kristina Johnson, Darren Simon, Proc. SPIE,
1959, pp. 55-68 (Apr 1993)
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