Title:
光相関装置および方法
Document Type and Number:
Japanese Patent JP2008517312
Kind Code:
A
Abstract:
This invention relates to a pattern recognition correlator and method for correlating input data with one or more reference data sets. The input data, which may be for instance digital amplitude modulated optical data, is used to modulate an optical signal to form a phase modulated optical signal. This temporal phase modulated optical signal is then converted into a parallel optical phase signal, preferably through use of an optical delay, and modulated by an optical phase modulator. When there is a correlation between the input data and the reference data the emerging wavefront is plane and can be strongly coupled to a detector. In the absence of correlation the emergent wavefront is not plane and so is not coupled as strongly to the detector. The detector output can therefore be used as an indication of correlation.
Inventors:
Wilson, Rebecca Ann
Louise, Meirion Francis
Ruin, Andreux Chyars
Louise, Meirion Francis
Ruin, Andreux Chyars
Application Number:
JP2007536268A
Publication Date:
May 22, 2008
Filing Date:
October 18, 2005
Export Citation:
Assignee:
Kinetic Limited
International Classes:
G02F3/00; G02F1/01; G06E3/00; G06K9/74; H04B10/516; H04B10/548; H04B10/61
Domestic Patent References:
| JP2001086097A | 2001-03-30 | |||
| JPH05300124A | 1993-11-12 | |||
| JP2001166261A | 2001-06-22 |
Foreign References:
| US3441724A | 1969-04-29 |
Attorney, Agent or Firm:
Yoshio Kawaguchi
Makoto Ono
Chihiro Watanabe
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura
Makoto Ono
Chihiro Watanabe
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura