Patents by Inventor Leonard Hanssen

Leonard Hanssen 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).

  • Variable angle reflectometer employing an integrating sphere and a light concentrator
    Patent number: 5745234
    Abstract: A reflectometer and a method for measuring the reflectance and transmittance of material using an integrating sphere and a light concentrator. The reflectance and transmittance measurements are performed as a function of the angle of incidence of a beam of light onto a sample and reference material. In a preferred embodiment, a CHC-lens concentrator having a high f/# and a low index of refraction is used.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: April 28, 1998
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Keith A. Snail, Leonard Hanssen, David Chenault