Patents by Inventor J. Allister McQuoid

J. Allister McQuoid has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optical filtering apparatus
    Patent number: 4669811
    Abstract: A well defined passband for an optical reflection filter is achieved by causing light to be reflected at least twice from a holographic wavelength selective reflector. Preferably the wavelength/reflectivity characteristics differ at the two reflections to give relatively shifted, but overlapping, spectral passbands. The apparatus may comprise a fibre optic input cable which directs light at the holographic reflector and a corner cube reflector which returns the reflected light for a second reflection prior to receipt by a detector.
    Type: Grant
    Filed: November 6, 1984
    Date of Patent: June 2, 1987
    Assignee: Pilkington P.E. Limited
    Inventor: J. Allister McQuoid