3m Innovative Properties Company

Soemantri Widagdo

Audrey A Sherman

Michael Alan Meis

Kevin R Schaffer

Thu-Van T Tran

Marie A Boulos

Ellen O Aeling

John Allen Wheatley

Michael F Weber

William Blake Kolb

Michael Benton Free

Adam D Haag

Encai Hao

William D Coggio

Michael L Steiner

Kui Chen-Ho

Scott Melvyn Tapio

Lan Hong Liu

Charles David Hoyle

Robert F Kamrath

Brian W Ostlie

Fei Lu

Wendi J Winkler

Patrick J Yeshe

Optical constructions are disclosed. A disclosed optical construction includes a reflective polarizer layer, and an optical film that is disposed on the reflective polarizer layer. The optical film has an optical haze that is not less than about 50%. Substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other. The optical construction has an axial luminance gain that is not less than about 1.2.

Optical construction and display system incorporating same

Disclosed herein is an optical device having a light source and a viscoelastic lightguide. Light from the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection. The viscoelastic lightguide may comprise a pressure sensitive adhesive. The optical device may be used in a variety of constructions wherein the device emits light being transported within the viscoelastic lightguide. Constructions include those used for signs, markings, illumination devices, display devices, keypad assemblies and tail light assemblies for vehicles.

Light source and optical article including viscoelastic lightguide disposed on a substrate

Disclosed herein is an optical device having a light source, a viscoelastic lightguide and a retroreflective film suitable for retroreflecting light. Light from the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection. The transported light is extracted from the lightguide and retroreflected at a structured surface of the retroreflective film. The optical device may have a 'front lit' or a 'back lit' configuration depending on the relative positioning of the lightguide and the retroreflective film. The retroreflective film may include prismatic retroreflective sheeting, holographic film or film structured with diffraction gratings. The optical device may be used, for example, as a sign or marking, a license plate assembly, a tail light assembly for vehicles, a security laminate for protection of documents against tampering, or an illumination device.

Retroreflective articles and devices having viscoelastic lightguide

An illumination device is disclosed, having a lightguide optically coupled to a light source and a transducer for supplying power to the light source by converting energy received from a remote transmitter. Energy received from a remote transmitter can comprise radiofrequency waves, microwaves, infrared radiation, visible light, ultraviolet light, sunlight, sound waves or heat.

Illumination device having remotely powered lightguide

Growing community of inventors

Depok, Indonesia

Soemantri Widagdo