Patents Assigned to Cambridge Correlators Limited
  • Optical correlator
    Patent number: 7747102
    Abstract: An optical correlator includes an image production device and an image capture device disposed in a common plane. An optical device such as a lens or mirror provides a Fourier transform of image information from the image production device onto the image capture device. An advantage of embodiments of the invention is its small size.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: June 29, 2010
    Assignee: Cambridge Correlators Limited
    Inventors: Nicholas James New, Timothy David Wilkinson
  • Optical correlator
    Patent number: 6804412
    Abstract: A method is described of optically performing a joint transform correlation starting from images displayed side-by-side on a spatial light modulator illuminated by a collimated light source. The image is focused by a lens onto a camera, the image is recorded by a frame grabber, and processed by a computer. By using a two pass process, the result is a measure of the correlation of the images. The images may be preprocessed in a phase-encoded chequerboard pattern and binarised by thresholding based on the average value of neighbouring pixels.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: October 12, 2004
    Assignee: Cambridge Correlators Limited
    Inventor: Timothy David Wilkinson