The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2007
Filed:
May. 20, 2003
James C. Bremer, Silver Spring, MD (US);
Bert A. Pasquale, Laurel, MD (US);
Tmitri J. Zukowski, Alexandria, VA (US);
Barbara J. Zukowski, Alexandria, VA (US);
Shahriar Etemad, Alexandria, VA (US);
Robert E. Prince, Catonsville, MD (US);
James C. Bremer, Silver Spring, MD (US);
Bert A. Pasquale, Laurel, MD (US);
Tmitri J. Zukowski, Alexandria, VA (US);
Barbara J. Zukowski, Alexandria, VA (US);
Shahriar Etemad, Alexandria, VA (US);
Robert E. Prince, Catonsville, MD (US);
Swales & Associates, Inc., Beltsville, MD (US);
Abstract
A collimator is compact and uses power efficient light emitting diodes as the illumination source to generate a test image in collimated space. The collimator provides a test image across a wide field of view, which is useful for calibration of optical devices that have a wide field of regard. An optical projection system in the collimator utilizes an array of light emitting diodes, whose light is converged by a Fresnel lens, through a holographic diffuser plate, onto a target plate bearing the test pattern to be projected out into collimated space through a converging lens. An alignment structure provides translation of the target plate along the main axis of the collimator and provides rotational freedom about two axes (vertical and horizontal) via a gimbal structure mounted on the translation mechanism.