3m Innovative Properties Company

Craig R Schardt

John Allen Wheatley

Andrew John Ouderkirk

Catherine A Leatherdale

Mark T Anderson

Martin B Wolk

Michael F Weber

Kenneth A Epstein

Olester Benson, Jr

Mieczyslaw H Mazurek

Michael Benton Free

Anatoly Z Rosenflanz

Bing Hao

Manoj Nirmal

Charles A Marttila

Stephen J Willett

John C Schultz

Matthew H Frey

Timothy J Hebrink

Kenton D Budd

Zhaohui Yang

David Scott Thompson

Wendy L Thompson

William J Bryan

Timothy J Nevitt

Gilles J Benoit

Ronald David Jesme

Gary Timothy Boyd

Adam D Haag

Rolf W Biernath

David G Freier

Joseph Clark Carls

Kristopher J Derks

Karl K Stensvad

D Scott Thompson

Justin P Meyer

James Robert Onstott

James E Watson

David J W Aastuen

Brian W Ostlie

Nicole J Wagner

Edward J Kivel

Xudong Fan

Myron K Jordan

Eric J Borchers

Scott J Kienitz

Stephen J Willet

Lawrence J Donalds

Alessandra O Chiareli

Nicholas D Petkovich

Kenneth L Smith

Michael Alan Meis

Michael Nelson

Mikhail L Pekurovsky

Zhisheng Yun

James M Nelson

Robert L Brott

Hao Wu

Donald Kent Larson

Philip Edwin Watson

Matthew S Stay

Brian E Brooks

Cary A Kipke

Andrew P Bonifas

Kevin W Gotrik

Joan M Noyola

Shawn C Dodds

Tommie W Kelley

Erik A Aho

Ann M Gilman

Mohsen Salehi

Larry A Meixner

Scott E Brigham

Craig R Sykora

Ryan C Shirk

Daniel J Treadwell

Kathy L Hagen

Stephan J Pankratz

Andrea Alu

Derek W Patzman

Vadim N Savvateev

Andrew Bonifas

Patrick M Campbell

Anthony J Piekarczyk

Adam Overvig

Richard F Griffith

Constand E Yemelong

Amy J Hite

Lowell C Frank

Stephen C King

Dong Lu

Luke A Schroeder

Nicole D Petkovich

Xuexue Guo

Dwight E Baldwin

James E Anderson

Duane E Preiss

An optical article includes a waveguide and a structured film. The structured film includes a polymeric substrate, an etch stop layer disposed on the polymeric substrate, a structured layer including a plurality of engineered structures disposed on a side of the etch stop layer opposite the polymeric substrate, a planarizing backfill layer disposed over the plurality of engineered structures to define a substantially planar major surface of the planarizing backfill layer having a surface roughness Ra, and an adhesive layer disposed on the substantially planar surface of the planarizing backfill layer and bonding the structured film to the waveguide. A difference in index of refraction of the planarizing backfill layer and the structured layer is at least 0.25 for at least a first wavelength Win a range of 400 nm to 2500 nm. The adhesive layer has an average thickness ta where Ra<ta<¼W

Structured film and optical article including structured film

An optical construction includes a reflective polarizer layer having a first pass axis and an absorptive polarizer layer having a second pass axis that is substantially aligned with the first pass axis. At least one electrically conductive light scattering layer is arranged between the reflective polarizer layer and the absorptive polarizer layer.

Optical constructions

An optical system for displaying a virtual image to a viewer includes stacked integral first reflective polarizer and integral second reflective polarizer, a display, and a mirror. For substantially normally incident light: for at least one visible wavelength in a first wavelength range, the first reflective polarizer reflects at least 60% of the incident light having a first polarization state and transmits at least 60% of the incident light having an orthogonal second polarization state, and the second reflective polarizer transmits at least 60% of the incident light for each of the first and second polarization states; and for at least one infrared wavelength in a second wavelength range, the first reflective polarizer reflects at least 60% of the incident light having the first polarization state and transmits at least 60% of the incident light having the second polarization state, and the second reflective polarizer reflects at least 60% of the incident light having the second polarization state and transmits at least 20% of the light having the first polarization state.

Polarization beam splitter and hot mirror for heads up display

An optical system, including a reflective polarizer, and a display and a mirror disposed on a same side of, and generally facing, the reflective polarizer. The reflective polarizer may transmit at least 80% of incident light having a first polarization state and may reflect at least 80% of incident light having a second polarization state, and the mirror may reflect at least 80% of the incident light for each of the first and second polarization states. The central locations of the display, reflective polarizer, and mirror may define a midplane which includes first, second, and third regions, such that the first region includes portions of the image rays that pass at least once across the region, the second region includes portions of the image rays that pass at least twice across the region, and the third region includes portions of the image rays that pass three times across the region. The first, second, and third regions may have respective areas A, A, and A, such that A/Ais greater than or equal to about 0.20, or 0.22, or 0.24, or 0.26, or 0.28, or 0.30.

Compact heads-up display

The present disclosure provides lamination transfer films and use of the lamination transfer films, particular in the fabrication of architectural glass elements, such as those used in Insulated Glass Units (IGUs). The lamination transfer films may be used to transfer functional layers and structures. The lamination transfer films may include a support film that can be removed during the transfer process, and the transferred materials are primarily inorganic. The resulting transferred structures on glass generally have high photo- and thermal-stability, and therefore can successfully be applied to the glass surfaces that are interior to the cavity within an IGU. The lamination transfer films can also be patterned such that macroscopic patterns of microoptical elements can be applied on a glass surface.

Microoptics for glazing

Methods for management of a powertrain system in a vehicle. The methods receive data or signals from multiple sensors associated with the vehicle. Optimum thresholds for classifications of the sensor data can be changed based injecting signals into the powertrain system and receiving responsive signals. Expected priorities for the sensor signals can be altered based upon attributes of the signals and confirming actual priorities for the signals. Look-up tables for engine management can be modified based upon injecting signals into the powertrain system and measuring a utility of the responsive signals. The methods can thus dynamically alter and modify data for powertrain management, such as look-up tables, during vehicle operation under a wide range of conditions.

Causal analytics for powertrain management

A system for use in wirelessly monitoring a pipeline such as a natural gas pipe. The system includes a locator configured to wirelessly transmit power and a subsoil sensor marker located adjacent the pipe and configured to wirelessly communicate with the locator. The sensor marker includes a microcontroller, a memory module, a sensor configured to sense the presence of a gas, and a power module. The power module is configured to harvest a sufficient amount of the power wirelessly transmitted from the locator in order to operate the microcontroller to take a measurement via the sensor, save the measurement in the memory module, and wirelessly transmit the measurement to the locator.

Wireless power transfer and sensing for monitoring pipelines

A system having a concealed communications element like a telecommunication antenna is described. More specifically, The system has a communications element that is concealed by a highly reflective multilayer polymer optical film. The first element of the multilayer polymer optical film is a core layerthat is made up of a multilayer optical stack. The multilayer optical stack of core layerincludes two alternating polymeric layers. The multilayer polymer optical film may optionally also include a protective layer(for example, a hardcoat or an over laminate) that is positioned between the viewer and the core layer. The protective layermay include one or more UV absorbers to aid in durability of the multilayer polymer optical film against UV-degradation. Multilayer polymer optical filmmay optionally also include an adhesive layerthat is positioned between the core layerand a surface onto which the multilayer polymer optical film is to be adhered.

System having a telecommunications element being concealed by a reflective structure comprising a polymer optical multilayer film

Projection subsystems are described. More, particularly, projection subsystems that include a light source and a polarizing beam splitter are described. The polarizing beam splitters of the presently described projection subsystems are capable of avoiding performance degradation even after exposure to large doses of incident light.

Projection subsystem

A composite article having a conductive layer on at least a portion of a flexible substrate. Electrical connectivity between various portions of the substrate can be obtained through this conductive layer. The conductive layer comprises a conductive surface, and there is a patterned layer on at least a portion of a first region of the conductive surface. The patterned layer comprises a conductive material having a surface roughness, and is in electrical contact with the conductive surface. An overcoat layer is present on at least a portion of the first region, such that the overcoat layer has a thickness less than the surface roughness, such that the conductive layer within the first region is covered by the overcoat layer, and such that at least a portion of the patterned layer substantially protrudes above the overcoat layer. The protruding portion permits electrical contact with the patterned layer, and via the conductive layer to other parts of the patterned layer and/or electrically conductive connectors to external electronic devices. Methods for forming the composite article are also disclosed. Methods of making such composite articles are also disclosed.

Overcoated patterned conductive layer and methods

Growing community of inventors

Woodbury, MN, United States of America

Craig R Schardt