Patents by Inventor Emanuel N. H. J. Stassar

Emanuel N. H. J. Stassar 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).

  • Compact optical system and lenses for producing uniform collimated light
    Patent number: 7967477
    Abstract: An optical system includes a cylindrical side emitter lens, a reflector and a cylindrical Fresnel lens to produce a substantially uniformly illuminated exit plane with well collimated light in the forward direction. The cylindrical side emitter lens redirects light from a light source, such as a number of light emitting diodes placed in a straight line, into side emitted light along an optical axis that is parallel with the exit plane. The reflector may be a stepped multi-focal length reflector that includes multiple reflector surfaces with different focal lengths based on the surfaces distance to the light source and height to redirect light from the cylindrical side emitter lens to illuminate the exit plane and collimate the light along one axis in the forward direction. The cylindrical Fresnel lens is used to collimate the light along an orthogonal axis in the forward direction.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: June 28, 2011
    Assignee: Philips Lumileds Lighting Company LLC
    Inventors: Pascal J. H. Bloemen, Emanuel N. H. J. Stassar
  • Compact Optical System and Lenses for Producing Uniform Collimated Light
    Publication number: 20090067170
    Abstract: An optical system includes a cylindrical side emitter lens, a reflector and a cylindrical Fresnel lens to produce a substantially uniformly illuminated exit plane with well collimated light in the forward direction. The cylindrical side emitter lens redirects light from a light source, such as a number of light emitting diodes placed in a straight line, into side emitted light along an optical axis that is parallel with the exit plane. The reflector may be a stepped multi-focal length reflector that includes multiple reflector surfaces with different focal lengths based on the surfaces distance to the light source and height to redirect light from the cylindrical side emitter lens to illuminate the exit plane and collimate the light along one axis in the forward direction. The cylindrical Fresnel lens is used to collimate the light along an orthogonal axis in the forward direction.
    Type: Application
    Filed: September 6, 2007
    Publication date: March 12, 2009
    Applicant: Philips Lumileds Lighting Company LLC
    Inventors: Pascal J.H. Bloemen, Emanuel N.H.J. Stassar