3m Innovative Properties Company

Sara Suzanne Merritt

John Allen Wheatley

Timothy J Nevitt

Gilles J Benoit

Rolf W Biernath

Tri Dinh Pham

Guanglei Du

James Hillis

Owen M Anderson

Gary Timothy Boyd

Nicholas A Johnson

Haiyan Zhang

Jeffrey L Solomon

William F Edmonds

Jason S Petaja

Brandt K Carter

Nathaniel K Naismith

Stephen J Etzkorn

Joseph T Aronson

Oanh V Pham

Corey D Balts

A technique of determining the presence of a species in a sample may include passing light through an optical filter. In an example, the optical filter may include a spatially variant microreplicated layer optically coupled to a wavelength selective filter. The wavelength selective filter may have a light incidence angle-dependent optical band. The spatially variant microreplicated layer may be configured to transmit light to a first optical region of the wavelength selective filter at a first predetermined incidence angle and to a second optical region of the wavelength selective filter at a second predetermined incidence angle.

Technique for determining presence of a species in a sample

In an example, an example article may include a spatially variant microreplicated layer optically coupled to a wavelength selective filter. The wavelength selective filter may have a light incidence angle-dependent optical band. The spatially variant microreplicated layer may be configured to transmit light to a first optical region of the wavelength selective filter at a first predetermined incidence angle and to a second optical region of the wavelength selective filter at a second predetermined incidence angle.

Optical filters having spatially variant microreplicated layers

A microstructured diffuser is described comprising a light transmissive film comprising a first microstructured surface comprising a plurality of peaks and valleys. A coating is disposed on the first microstructured surface. The coating partially fills the valleys forming a second microstructured surface.

Microstructured diffuser comprising first microstructured layer and coating, optical stacks, and method

A diffuser including opposing structured first and second major surfaces is described. The first major surface includes a first plurality of surface structures providing a uniform first haze. The second major surface includes a first portion adjacent an edge and a second portion adjacent the first portion. The first portion includes a first region and a second region between the first region and the second portion. The second major surface includes a second plurality of surface structures providing a uniform second haze over the second portion and providing a third haze in the first portion. The third haze in the first region is higher than the second haze, and the third haze in the second region is monotonically decreasing. The second portion has a surface area of at least 90 percent of a surface area of the second major surface.

Graded diffuser

Growing community of inventors

Grant, MN, United States of America

Sara Suzanne Merritt