The present invention provides a lamp cover comprising (1) a thermoplastic resin having a visible light transmissivity of 50% or higher measured in a form of a plate-like molded body having a thickness of 2 mm according to JIS R 3106, (2) a composite tungsten oxide, (3) at least one material selected from the group consisting of a metal soap, an antioxidant, and a first selective wavelength absorbing material having a maximum absorption wavelength within a range of 200 to 350 nm, whose content is 0.03% by mass or more based on a total content (100% by mass) of the components (1) to (4), and (4) a second selective wavelength absorbing material having a maximum absorption wavelength within a range of 450 to 550 nm.

The present disclosure relates to a lighting device for automatically switching between a visible light source and an infrared light source. The lighting device may include a light source, an infrared filter, and a driving module for driving the infrared filter.

A method of fabricating an optical computing device using a photonic crystal-based integrated computational element is provided. The method includes selecting a photonic crystal structure with a design suite stored in a non-transitory, computer-readable medium and obtaining a transmission spectrum for the selected photonic crystal. Further, the method includes determining a predictive power of a photonic crystal-based integrated computational element for a characteristic of a sample using the transmission spectrum and a spectral database. And adjusting the transmission spectrum to improve a predictive power of the photonic crystal-based integrated computational element for measuring a characteristic of a sample being analyzed. Also, fabricating the photonic crystal structure for the photonic crystal-based integrated computational element when the predictive power surpasses a pre-selected threshold.

A method of fabricating an optical computing device using a photonic crystal-based integrated computational element is provided. The method includes selecting a photonic crystal structure with a design suite stored in a non-transitory, computer-readable medium and obtaining a transmission spectrum for the selected photonic crystal. Further, the method includes determining a predictive power of a photonic crystal-based integrated computational element for a characteristic of a sample using the transmission spectrum and a spectral database. And adjusting the transmission spectrum to improve a predictive power of the photonic crystal-based integrated computational element for measuring a characteristic of a sample being analyzed. Also, fabricating the photonic crystal structure for the photonic crystal-based integrated computational element when the predictive power surpasses a pre-selected threshold.

Extreme ultraviolet mirrors and masks used in lithography and methods for manufacturing an extreme ultraviolet mirror or mask. Initial data is obtained that includes materials and optical properties for a first intermixed layer, a second intermixed layer, a first pure layer, and a second pure layer in each of a plurality of periods of a multi-layer stack for an optical element. For multiple thicknesses for the first pure layer and multiple thicknesses for the second pure layer, a reflectivity of the multi-layer stack is determined based on the initial data, a thickness received for the first intermixed layer, and a thickness received for the second intermixed layer. One of the thicknesses for the first pure layer and one of the thicknesses for the second pure layer are selected that maximize the reflectivity of the multi-layer stack.

An optical filter, a process for producing an optical filter, and the use of the optical filter are provided. The optical filter includes a substrate and a filter layer on at least one side of the substrate. The filter layer has a matrix and at least one organic dye dissolved in the matrix. The filter layer has optical homogeneity.

In described examples, one or more devices include: a light source to generate a beam of light; and optics to generate a spot of light in response to the beam of light. A color wheel revolves in a direction of rotation about an axis, so the spot of light illuminates an area of the color wheel. The spot of light has: a first width; and a second width wider than the first width and orthogonal to the first width. The first width is aligned tangential to the direction of rotation.

Provided is an optical filter, which includes a light-absorbing layer and a light-reflecting layer and satisfies the following requirements: (i) in a spectral transmittance curve at an incident angle of 0, an average transmittance over the 430-620 nm wavelength range is 80%, an average transmittance over the 430-450 nm wavelength range is 76%, an average transmittance over the 735-1100 nm wavelength range is 5%, and an average transmittance over the 350-395 nm wavelength is 5%; and (ii) there is a wavelength .sub.0(UV) with transmittance of 50% in the 400-425 nm wavelength range in the spectral transmittance curve at the incident angle of 0, there is a wavelength .sub.30(UV) with transmittance of 50% in the 400-425 nm wavelength range in a spectral transmittance curve at an incident angle of 30, and an absolute value of a difference between the wavelengths, |.sub.0(UV).sub.30(UV),| is 5 nm.

A daylighting system includes a sheet-like light control member disposed on at least an upper part of a daylighting opening, and a shade disposed oppositely to at least a part of the opening, the part being below the part where the light control member is disposed. The light control member is configured to change upward a traveling direction of incident light and allow the incident light to pass through the light control member.

A daylighting system includes a sheet-like light control member disposed on at least an upper part of a daylighting opening, and a shade disposed oppositely to at least a part of the opening, the part being below the part where the light control member is disposed. The light control member is configured to change upward a traveling direction of incident light and allow the incident light to pass through the light control member.