3m Innovative Properties Company

Agora Lab, Inc.

Yi Hang Lv

John Allen Wheatley

Neeraj Sharma

Guanglei Du

Anthony M Renstrom

Fuguo Xu

Shie Qian

Ruofei Chen

Siqiang Yao

Zehua Gao

A system may include one or both of a light emitter and a light receiver, and an optical filter. 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. The optical filter may include a wavelength selective reflective layer. The optical filter may include a wavelength selective absorbing layer. 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.

Optical camouflage filters

An optical system includes a multilayer optical film configured to block transmission of visible light but allow peaks or bands of certain visible wavelengths to pass through; an object disposed on a first side of the multilayer optical film; and a light source and a light sensor disposed on an opposite second side of, and facing, the multilayer optical film. The object is configured to receive light emitted by the light source through the multilayer optical film. The light sensor is configured to receive light from the multilayer optical film. An optical filter may include the multilayer optical film disposed on a wavelength selective scattering layer and/or on a wavelength selective absorbing layer. The wavelength selective scattering layer may have a near-infrared scattering ratio of less than about 0.9.

Optical systems and optical filters

A system may include one or both of a light emitter () and a light receiver (), and an optical filter (). 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 (). The optical filter () may include a wavelength selective reflective layer (). The optical filter () may include a wavelength selective absorbing layer (). 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.

A method for decoding multiple descriptions for a media stream includes decoding at least one of a first description and a second description from the media bitstream, wherein the first description and the second description are associated with a current sample of the media bitstream and independently decodable; based on a determination that the second description is missing, reconstructing, by a decoder, the current sample by performing a third shifting operation on the first description, wherein the third shifting operation on the first description comprises left shifting the first description by one bit; and based on a determination that both the first description and the second description have been received, reconstructing, by the decoder, the current sample by summing the first description and the second description. An encoding method is also provided.

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Shanghai, China

Yi Hang Lv