公开(公告)号：US11953709B2

公开(公告)日：2024-04-09

申请号：US17527837

申请日：2021-11-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Guanglei Du ,  John A. Wheatley ,  William B. Kolb ,  John C. Schultz ,  Daoyun Song ,  Luke D. Riveness

IPC: G02B5/26 ,  G02B5/20 ,  G02B5/22 ,  G02B5/28

CPC classification number: G02B5/26 ,  G02B5/206 ,  G02B5/208 ,  G02B5/22 ,  G02B5/223 ,  G02B5/281

Abstract: A system may include one or both of a light emitter and a light receiver. The system may include an optical filter adjacent one or both of the light emitter or the light receiver. The optical filter includes a wavelength selective scattering layer. The wavelength selective scattering layer may have a near-infrared scattering ratio of less than about 0.9. The filter may have a visible reflective haze ratio of greater than about 0.5. A method may include disposing the wavelength selective scattering layer adjacent one or both of the light emitter and the light receiver. An article may include the optical filter. The wavelength selective scattering layer may have an average near-infrared scattering of less than 60%, an average visible scattering of greater than 10%, and a difference between the % total visible reflectance and the % diffuse visible reflectance of less than 20.

公开(公告)号：US11204456B2

公开(公告)日：2021-12-21

申请号：US16071573

申请日：2017-01-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Guanglei Du ,  John A. Wheatley ,  William B. Kolb ,  John C. Schultz ,  Daoyun Song ,  Luke D. Riveness

IPC: G02B5/26 ,  G02B5/28 ,  G02B5/22 ,  G02B5/20

Abstract: A system may include one or both of a light emitter and a light receiver. The system may include an optical filter adjacent one or both of the light emitter or the light receiver. The optical filter includes a wavelength selective scattering layer. The wavelength selective scattering layer may have a near-infrared scattering ratio of less than about 0.9. The filter may have a visible reflective haze ratio of greater than about 0.5. A method may include disposing the wavelength selective scattering layer adjacent one or both of the light emitter and the light receiver. An article may include the optical filter. The wavelength selective scattering layer may have an average near-infrared scattering of less than 60%, an average visible scattering of greater than 10%, and a difference between the % total visible reflectance and the % diffuse visible reflectance of less than 20.