A method of drawing different materials includes forming a first material into a preform body defining at least one channel extending therethrough having a first cross-sectional area. A first element formed of a second material is inserted into the channel and with the preform body creates a preform assembly. The first element has a cross-sectional area that is less than the cross-sectional area of the channel, and the second material has a higher melting temperature than the first material. The preform assembly is heated so that the first material softens and the preform assembly is drawn so that the preform body deforms at a first deformation rate to a smaller cross-sectional area and the first element substantially maintains a constant cross-sectional area throughout the drawing process. Upon completion of the drawing step, the cross-sectional area of the channel is equivalent to the cross-sectional area of the first element.

A method controls fabrication of a multi-layered integrated computational element designed to have a target optical spectrum. A transfer function is generated relating a blue wavelength, shift between an as-annealed optical spectrum and an as-fabricated optical spectrum of a first integrated computational element at a standard temperature. Using the transfer function, an initial compensating red shift is incorporated into a second integrated computational element such that the as-annealed optical spectrum of the second integrated computational element matches the target optical spectrum.

A high energy visible (HEV) light absorbing material for an ophthalmic substrate and application through physical vapor deposition. The HEV light absorbing material is deposited onto the ophthalmic substrate, such as an optical lens. The HEV light absorbing material is applied through physical vapor deposition. The HEV light absorbing material is applied as a thin layer on ophthalmic substrates for flexibility and color adaptation. The HEV light absorbing material includes at least one of: aluminum zinc oxide, indium zinc oxide and gallium zinc oxide with a material commonly used in the design of antireflective absorbing materials. The HEV light absorbing coating is antireflective and transmits up to 98% of light for the rest of spectrum. The HEV light absorbing material allows the ophthalmic substrate to selectively absorb blue light that falls in the wavelength range of about 400 nm to about 460 nm so that flux of blue light to the internal structures of the eye is reduced.

The disclosure provides an eyeglass lens for blocking ultraviolet and blue light comprising a mixture of: a polymerization initiator which reacts with a monomer, which is a raw material of a plastic lens whose refractive index varies depending on physical properties, and which converts the monomer into a polymer; an ultraviolet absorber for absorbing ultraviolet from a plastic lens mixed with the monomer to then be converted into a polymer; and a transparent material for making the plastic lens, which was mixed with the monomer and converted into a polymer, transparent by minimizing a phenomenon in which the plastic lens appears yellow, wherein the ultraviolet absorber comprises a mixture of any one or more of UV-A, UV-B and UV-C which are benzotriazole-based ultraviolet absorbers having different molecular weights, and the transparent material is a mixture of a blue dye, showing blue color, and a red dye, showing red color.

The present application discloses a backlight module and a display device, the backlight module including a light source for emitting at least a first light; at least two sheets of light conversion films, wherein at least one sheet of light conversion films receives the first light and converts the light into at least a second light to emit, and makes the light emitting angle of the backlight module matching the wide viewing angle display requirements. It can increase the light emitting angle of the backlight module and achieve the wide viewing angle effect. By having at least two sheets of light conversion films at the same time, a part of the light is reflected back while the light is scattered and emitted at the same time, and the light is excited and emitted again, to improve the light utilization rate, enhance the brightness to have a better performance of display.

The method for manufacturing relates to an ophthalmic lens comprising a substrate and a functional film securely fastened to a curved face of said substrate. This method comprises a method for gluing the functional film, which is initially flat, to said curved face. The interferential and organic filtering film selected as said functional film filters a preset band of wavelengths and the gluing method is carried out so that the maximum of the degree of major deformation experienced by the film on a surface is lower than 3%. In the ophthalmic lens, the wavelength at which maximum filtration is observed at the center of the lens and the wavelength at which maximum filtration is observed at the periphery of the useful area of the lens differ by a less than 5%.

A method of drawing different materials includes forming a first material into a preform body defining at least one channel extending therethrough having a first cross-sectional area. A first element formed of a second material is inserted into the channel and with the preform body creates a preform assembly. The first element has a cross-sectional area that is less than the cross-sectional area of the channel, and the second material has a higher melting temperature than the first material. The preform assembly is heated so that the first material softens and the preform assembly is drawn so that the preform body deforms at a first deformation rate to a smaller cross-sectional area and the first element substantially maintains a constant cross-sectional area throughout the drawing process. Upon completion of the drawing step, the cross-sectional area of the channel is equivalent to the cross-sectional area of the first element.

A contact lens includes a body, a filtering characteristic of blocking at least some light with wavelengths between 400 nanometers and 500 nanometers from transmitting through the body, and a transmittance characteristic of transmitting at least some light with wavelengths above 500 nanometers through the body.

Methods, systems, apparatuses, and computer program products are provided for a backlight assembly for a display device. The backlight assembly includes a transparent waveguide layer, a plurality of light sources, and a tunable grating layer. The light sources are arranged along an edge of the waveguide layer. Each light source transmits light into the waveguide layer through the edge. The grating layer is coupled to the waveguide layer, and has multiple rows. Each row of the grating layer is segmented into a series of cells so the grating layer is sectioned into an array of cells. Each cell is independently controllable to either not extract incident light received from within the waveguide layer, or to extract the incident light for emission from the backlight assembly. In another configuration, the waveguide layer is not present, and the light sources transmit light directly into an edge of the grating layer.

Color-selective waveguides, methods for fabricating color-selective waveguides, and augmented reality (AR)/mixed reality (MR) applications including color-selective waveguides are described. The color-selective waveguides can advantageously reduce or block stray light entering a waveguide (e.g., red, green, or blue waveguide), thereby reducing or eliminating back-reflection or back-scattering into the eyepiece.