公开(公告)号：US20230311120A1

公开(公告)日：2023-10-05

申请号：US18186371

申请日：2023-03-20

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bharat R. Acharya ,  Kurt J. Halverson ,  Robert M. Biegler ,  Timothy J. Lindquist ,  John Allen Wheatley ,  James A. Phipps ,  Joshua J. Loga ,  Brett J. Sitter

IPC: B01L3/00

CPC classification number: B01L3/502715 ,  G02B5/085

Abstract: An optical system for examining an optical characteristic of a test material at at least a first wavelength includes an elongated hollow structure elongated along a length thereof and having one or more walls extending along the length of the hollow structure and defining an elongated chamber therebetween configured to receive the test material. The elongated hollow structure includes at least a first light opening, such that for the at least the first wavelength, the one or more walls have an optical reflectance of greater than about 50% for incident angles of up to at least 40 degrees, and at least one of the at least the first light opening has an optical transmittance of greater than about 50% for at least one incident angle.

公开(公告)号：US11360247B2

公开(公告)日：2022-06-14

申请号：US16638990

申请日：2018-10-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Michael A. McCoy ,  John Allen Wheatley ,  Gilles J. Benoit ,  Charles Allen Shaklee

IPC: G02B5/128 ,  G06F1/16

Abstract: A portable detection system comprises an energy source configured to transmit energy, a retroreflective article, a detector configured to sense retroreflective energy produced by interaction of the energy transmitted from the source and the retroreflective article, and an indicator that indicates the detection of the retroreflective energy, wherein at least one of the energy source and the detector are configured to be worn by a user.