A laser protection eyewear lens includes a lens substrate comprising an embedded wavelength filter having a first filter function, and a multi-layer dielectric filter applied to at least one of an inside and an outside surface of the lens substrate that comprises a second filter function having at least one center wavelength and bandwidth. The first filter function of the embedded wavelength filter and the second filter function of the multilayer dielectric filter produce a combined filter function that attenuates light reflecting off the multi-layer dielectric filter.

A plastic optical product 1 includes optical multilayer films 6 formed via intermediate films 4 on both surfaces of a plastic base 2. In each optical multilayer film 6, SiO.sub.2 layers 10 made of SiO.sub.2 and ZrO.sub.2 layers 12 made of ZrO.sub.2 alternate such that a total number of the SiO.sub.2 layers 10 and the ZrO.sub.2 layers 12 is seven and a layer closest to the base 2 is the SiO.sub.2 layer. The SiO.sub.2 layer 10 disposed at a third layer L3 counting from the base 2 has a physical film thickness of not less than 210 nm and not greater than 270 nm. The ZrO.sub.2 layer 12 disposed at a second layer L2 counting from the base 2 has a physical film thickness of not less than 7 nm and not greater than 12 nm.

A system, method for creating an optical device, and a device to enhance human color vision are disclosed. The system, method for creating the optical device, and device include a substrate, a plurality of thin film layers provided on the substrate, the plurality of thin film layers including materials creating thin film-specific reflectance spectra based on selected pluralities of materials each having their on respective refractive index, and a plurality of colorant layers applied to the plurality of thin film layers, the plurality of colorant layers including at least one colorant, the colorant created based on colorant-specific absorption spectra as defined by selected concentrations.

The invention generally relates to optical filters that provide regulation and/or enhancement of chromatic and luminous aspects of the color appearance of light to human vision, generally to applications of such optical filters, to therapeutic applications of such optical filters, to industrial and safety applications of such optical filters when incorporated, for example, in radiation-protective eyewear, to methods of designing such optical filters, to methods of manufacturing such optical filters, and to designs and methods of incorporating such optical filters into apparatus including, for example, eyewear and illuminants.

The invention relates to an optical lens comprising a substrate having a front main face and a rear main face, at least one main face of which being successively coated with a first high refractive index sheet which does not comprise any Ta.sub.2O.sub.5 layer, a second low refractive index sheet a third high refractive index sheet, a monolayer sub-layer having a thickness higher than or equal to 100 nm, a multilayer interferential coating comprising a stack of at least one high refractive index layer and at least one low refractive index layer, and a filtering interferential system that selectively reflects or transmits visible light in a narrow range of wavelengths.

The invention relates to an optical lens comprising a substrate having a front main face and a rear main face, at least one main face of which being successively coated with a first high refractive index sheet which does not comprise any Ta.sub.2O.sub.5 layer, a second low refractive index sheet a third high refractive index sheet, a monolayer sub-layer having a thickness higher than or equal 0 to 100 nm, and a multilayer interferential coating comprising a stack of at least one high refractive index layer and at least one low refractive index layer. The mean reflection factor R.sub.UV on said rear main face between 280 nm and 380 nm, weighted by the function W(λ) defined in the ISO 13666:1998 standard, is lower than 10%, for an angle of incidence of 35° .20

This invention relates to an optical article comprising a transparent substrate with a front main face and with a rear main face, at least one of the main faces being coated with an interferential coating, characterized in that said interferential coating comprises a stack comprising: —at least one layer having a low refractive index which is <1.6, called “LI layer”, —at least one HI/VHI/HI triplet of three layers composed of one layer: •having a very high refractive index which is ≥2.1, called “VHI layer”, •surrounded on both sides by two layers having a high refractive index which is ≥1.6, called “HI layers”, and such that the mean reflectance in ultra violet (UV) region R.sub.uv of said interferential coating is lower than or equal to 10% at an angle of incidence comprised between 30° and 45°.

The present invention relates to an optical article comprising: —a substrate, —one colouring component, so as to colour the substrate, and —coated on the substrate (a), an asymmetric interferential multilayer stack comprising at least one absorbing layer which absorbs in the visible region at a wavelength ranging from 380 to 780 nm.

Present invention relates to a colour filter (10) for modifying human colour vision, having a spectral transmission function in the visible light range wherein the average transmission in a wavelength range of at least 20 nm width below 530 nm is at least twice the average transmission in a second wavelength range between 530 and 580 nm, and the average transmission in a wavelength range of at least 20 nm width above 580 nm is at least twice the average transmission in the second wavelength range. The invention comprises a dyed carrier layer (12) and an interference layer (14) arranged thereon, the transmission function of the dyed carrier layer (12) and the transmission function of the colour filter (10) have the following relationship within the second wavelength range:

T.sub.sd(λ)<1−V(λ).Math.(1−T(λ)).Math.n wherein T(λ): is the transmission function of the colour filter (10), T.sub.sd(λ): is the transmission function of the dyed carrier layer (12), V(λ): is the sensitivity function of the human eye normalized to 1, n≥0.4.

The invention also relates to a method of designing such a colour filter (10).

An optical system having a spectral transmission profile having an average transmittance Ta between 380 nm and 780 nm and an average red light transmittance Tr between a first limit L1 and a second limit L2, with Tr<2*Ta/3 and L1=600 nm and L2=780 nm, and the optical system being configured to allow selectively retinal exposure of an eye to at least one selected range of wavelengths of light in the visible spectrum of 460 nm to 530 nm.