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:
Sep. 12, 2006
Filed:
Jan. 29, 2003
Hans-georg Lotz, Grundau, DE;
Peter Sauer, Schluchtern, DE;
Hans-Georg Lotz, Grundau, DE;
Peter Sauer, Schluchtern, DE;
Applied Films GmbH & Co. KG, Alzenau, DE;
Abstract
A material with spectrally selective reflection in the primary valences of red, green and blue is applied preferably onto laser projection screens in order to make possible the projection even in daylight. In a first embodiment, a first layer of a material that is highly reflective over the entire range of visible light, e.g., aluminum is applied onto a substrate, e.g., glass or a synthetic material, followed by a second layer of a material that is essentially non-absorbing over the entire range of visible light, e.g., SiO. A third layer in contact with air is applied to the second layer and is made of a material that is partially transmissive over the entire range of visible light, e.g., of NiCr An alternative embodiment comprise five layers, The first layer is made a material with a high index of refraction, e.g.; TiO, a second of a material with a low index of refraction, e.g., SiO, the third of a material with a high index of refraction, e.g., TiO: a fourth of a material with a low index of refraction. e.g., SiO, and a fifth layer of a material with a high index of refraction, e.g., TiO.