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:
Feb. 15, 2000
Filed:
Nov. 21, 1997
Adrianus J De Vaan, Eindhoven, NL;
Antonie W Damen, Tilburg, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to an illumination system (1) comprising, in this order, a radiation source (5) and an integrator system (11). First reflecting means are present in the exit plane (25) of the integrator system (11) and second reflecting means in the form of a reflective polarizer (29) are further present in the illumination system (1). An optical system (23) for at least partly imaging the exit surface of the integrator system (11) via the second reflecting means on the first reflecting means is present between the first reflecting means and the second reflecting means. Moreover, polarization-converting means are present between the first and the second reflecting means. The invention also relates to an image projection device and to a presentation system provided with such an illumination system.