Optical articles and systems interacting with the same

US11308378B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Michael A. McCoy · Battle Ground, US
• Anne C. Gold · South St. Paul, US
• Silvia Geciova-Borovova Guttmann · Okabena, US
• Glenn E. Casner · Woodbury, US
• Timothy J. Gardner · Windom, US
• Steven H. Kong · Woodbury, US
• Gautam Singh · Woodbury, US
• Jonathan T. Kahl · Woodbury, US
• Nathan J. Anderson · Woodbury, US
• Catherine L. Aune · Hammond, US
• Caroline M. Ylitalo · Stillwater, US
• Britton G. Billingsley · Windom, US
• Muhammad J. Afridi · Woodbury, US
• Kui Chen-Ho · Woodbury, US
• Travis L. Potts · Woodbury, US
• Robert W. Shannon · Stillwater, US
• Guruprasad Somasundaram · Minneapolis, US

Key dates

• Filing date: Sep 27, 2017
• Grant date: Apr 19, 2022
• Expiry date: Sep 27, 2037

Classification

• Technology area (CPC —): General

Abstract

Optical articles including a spatially defined arrangement of a plurality of data rich retroreflective elements, wherein the plurality of retroreflective elements comprise retroreflective elements having at least two different retroreflective properties and at least two different optical contrasts with respect to a background substrate when observed within an ultraviolet spectrum, a visible spectrum, a near-infrared spectrum, or a combination thereof.