Patents by Inventor Maarrten Marinus Johannes Wilhelm Van Herpen

Maarrten Marinus Johannes Wilhelm Van Herpen 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).

  • CAVITY-ENHANCED PHOTO ACOUSTIC TRACE GAS DETECTOR WITH IMPROVED FEEDBACK LOOP
    Publication number: 20100011836
    Abstract: A photo acoustic trace gas detector (100) is provided for detecting a concentration of a trace gas in a gas mixture. The detector (100) comprises a light source (101) for producing a light beam and a light modulator (103) for modulating the light beam into a series of light pulses at a chopping frequency for generating sound waves in the gas mixture. The amplitude of the sound waves is a measure of the concentration of the trace gas. The detector (100) further comprises an optical cavity (104a, 104b) with the gas mixture. The optical cavity (104a, 104b) amplifies the light intensity of the light pulses. A transducer (109) converts the sound waves into electrical signals. A feed back loop (110, 111, 113, 114) regulates a ratio of a length of the optical cavity (104a, 104b) and a wavelength of the light beam for amplifying the light intensity of the light pulses in the optical cavity (104a, 104b).
    Type: Application
    Filed: August 30, 2007
    Publication date: January 21, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Jeroen Kalkman, Maarrten Marinus Johannes Wilhelm Van Herpen, Hans Willem Van Kesteren