Patents by Inventor Antonius M. J. Koonen

Antonius M. J. Koonen 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 wavelength demultiplexer
    Patent number: 4723829
    Abstract: A device for separating radiation beams of different wavelengths, which emerge from an optical fiber. The device includes a reflection grating and a wavelength-selective mirror. The wavelength-selective mirror is arranged between the optical fiber and the reflection grating. The mirror reflects radiation beams of wavelengths which are spaced comparatively far from the wavelengths of the radiation beams of comparatively closely spaced wavelengths. The reflected beam is reflected to an output fiber. The mirror transmits the radiation beams of comparatively closely spaced wavelengths to the reflection grating.
    Type: Grant
    Filed: July 25, 1985
    Date of Patent: February 9, 1988
    Assignee: U.S. Philips Corporation
    Inventor: Antonius M. J. Koonen