公开(公告)号：US11802792B2

公开(公告)日：2023-10-31

申请号：US17515687

申请日：2021-11-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： John A Wheatley ,  Gilles J. Benoit ,  Guanglei Du ,  Rolf W. Biernath ,  Sara Suzanne Merritt ,  James Hillis ,  Owen M. Anderson ,  Timothy J. Nevitt

IPC: G01J1/04 ,  G01J1/20 ,  G01J3/12 ,  G01J3/28 ,  G01J3/46 ,  G01J3/51 ,  G01N21/31 ,  G02B5/136 ,  G02B5/20

CPC classification number: G01J1/0492 ,  G01J1/20 ,  G01J3/12 ,  G01J3/28 ,  G01J3/46 ,  G01J3/513 ,  G01N21/31 ,  G02B5/136 ,  G01J2003/1213 ,  G01J2003/2806 ,  G02B5/201

Abstract: 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.