Broadband solar control film

US9395475B2 · kind B2 · utility

Assignee

• Eastman Chemical Company · US

Inventors

• Kevin C. Krogman · Santa Clara, US
• J. Wallace Parce · Palo Alto, US
• Siglinde Schmid · San Jose, US
• Melissa Fardy · Belmont, US
• Tom Hood · Portola Valley, US
• Steven D. White · Sunnyvale, US
• Benjamin Wang · Mountain View, US

Key dates

• Filing date: Apr 5, 2014
• Grant date: Jul 19, 2016
• Expiry date: Oct 9, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B5/285
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Traditional solar control applications rely on thin metal films to reflect EM radiation with wavelengths longer than that of the visible spectrum. Unfortunately such films also block radiation in cellular, GPS, and radio frequency bands. In one aspect, the disclosure provides a selectively-blocking filter that uses one or more optical filters tuned to a specific range(s) of wavelengths (e.g. for blocking IR radiation), while readily transmitting other wavelengths (e.g. both visible light and cellular/GPS signals). The filters can be manufactured on both flexible and rigid substrates.