3m Innovative Properties Company

William J Gray

John Allen Wheatley

Encai Hao

Michael L Steiner

Mark A Roehrig

Zhaohui Yang

Bharat R Acharya

Brett J Sitter

Kristy A Gillette

Jonah Shaver

Aaron M Marcella

Jessica E Demay

Stephen M Kennedy

A measurement system is disclosed and includes a light source, a receiver, a measurement subject, and a reflector. The reflector is disposed on an opposite side of the measurement subject than are the light source and the receiver.

Measurement system including reflector

An integral optical construction includes a lens layer including a structured first major surface having a plurality of microlenses. An optically opaque mask layer is disposed on the lens layer and defines a plurality of openings. Each of the openings extends from a first major surface of the mask layer facing the lens layer to an opposite second major surface of the mask layer. The openings are in a one-to-one correspondence with the microlenses. Regions of the mask layer between the openings have an optical density of greater than about 2 for at least a first visible wavelength in a visible wavelength range. An optical adhesive layer is disposed on, and makes physical contact with, the second major surface of the mask layer. The optical adhesive layer defines a recess at each of the openings. The recess includes a closed bottom and an opposite open top open to the opening.

Optical constructions for display systems

Portable display sign

Growing community of inventors

Woodbury, MN, United States of America

William J Gray