An optical member that has excellent antireflection properties and that can maintain antifogging properties over a long term, and a method for manufacturing an optical member are provided. The optical member includes, in sequence, a substrate, a porous layer, and a multilayered antireflection layer. The ratio n/n.sub.0 is 0.85 or more and 0.95 or less, where n represents a refractive index of a layer having the highest refractive index among layers included in the antireflection layer and n.sub.0 represents a refractive index of a compound constituting the layer having the highest refractive index at a theoretical density.

An optical member that has excellent antireflection properties and that can maintain antifogging properties over a long term, and a method for manufacturing an optical member are provided. The optical member includes, in sequence, a substrate, a porous layer, and a multilayered antireflection layer. The ratio n/n.sub.0 is 0.85 or more and 0.95 or less, where n represents a refractive index of a layer having the highest refractive index among layers included in the antireflection layer and n.sub.0 represents a refractive index of a compound constituting the layer having the highest refractive index at a theoretical density.

The invention relates to an optical article having a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7, comprising a substrate having at least one main face successively coated with a monolayer sub-layer having a thickness higher than or equal to 250 nm and a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less. The ratio: (I) is higher than or equal to 1.5, and/or the deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate has been carried out under ionic assistance.

[00001]$\begin{array}{cc}{R}_D=\frac{\begin{array}{c}\mathrm{thickness}\mathrm{of}\mathrm{the}\mathrm{outermost}\mathrm{low}\mathrm{refractive}\mathrm{index}\\ \mathrm{layer}\left(s\right)\mathrm{of}\mathrm{the}\mathrm{interferential}\mathrm{coating}\end{array}}{\begin{array}{c}\mathrm{thickness}\mathrm{of}\mathrm{the}\mathrm{outermost}\mathrm{high}\mathrm{refractive}\mathrm{index}\\ \mathrm{layer}\left(s\right)\mathrm{of}\mathrm{the}\mathrm{interferential}\mathrm{coating}\end{array}}& \left(I\right)\end{array}$

The invention relates to an optical article having a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7, comprising a substrate having at least one main face successively coated with a monolayer sub-layer having a thickness higher than or equal to 250 nm and a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less. The ratio: (I) is higher than or equal to 1.5, and/or the deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate has been carried out under ionic assistance.

[00001]$\begin{array}{cc}{R}_D=\frac{\begin{array}{c}\mathrm{thickness}\mathrm{of}\mathrm{the}\mathrm{outermost}\mathrm{low}\mathrm{refractive}\mathrm{index}\\ \mathrm{layer}\left(s\right)\mathrm{of}\mathrm{the}\mathrm{interferential}\mathrm{coating}\end{array}}{\begin{array}{c}\mathrm{thickness}\mathrm{of}\mathrm{the}\mathrm{outermost}\mathrm{high}\mathrm{refractive}\mathrm{index}\\ \mathrm{layer}\left(s\right)\mathrm{of}\mathrm{the}\mathrm{interferential}\mathrm{coating}\end{array}}& \left(I\right)\end{array}$

A method for operating a coating system for producing layer systems includes the steps of: (i) coating a layer system in a coating facility; (ii) determining a spectral actual measuring plot for the layer system in an optical measuring system; (iii) determining an actual data set by fitting a simulation target measuring plot to the actual measuring plot; (iv) determining actual layer parameters as computed actual layer parameters from the simulation target measuring plot by simulation of the layer system using the actual data set; (v) outputting the actual data set and the computed actual layer parameters at least to a decision system; (vi) providing quality requirement data; and (vii) deciding on an approval of the layer system in the decision system on the basis of a comparison of at least the actual data set, the computed actual layer parameters and. the quality requirement data. A coating system for producing layer systems is also disclosed.

A method for operating a coating system for producing layer systems includes the steps of: (i) coating a layer system in a coating facility; (ii) determining a spectral actual measuring plot for the layer system in an optical measuring system; (iii) determining an actual data set by fitting a simulation target measuring plot to the actual measuring plot; (iv) determining actual layer parameters as computed actual layer parameters from the simulation target measuring plot by simulation of the layer system using the actual data set; (v) outputting the actual data set and the computed actual layer parameters at least to a decision system; (vi) providing quality requirement data; and (vii) deciding on an approval of the layer system in the decision system on the basis of a comparison of at least the actual data set, the computed actual layer parameters and. the quality requirement data. A coating system for producing layer systems is also disclosed.

The present invention provides: a lightweight optical member which can be produced at relatively low cost and which provides low reflectance, stability upon exposure to light, and abrasion resistance; and an efficient method for producing such an optical member. An optical member according to the present invention is characterized by comprising: a metallic base material; a low-reflective treatment layer formed on the surface of the metallic base material; and a silica layer formed on the surface of the low-reflective treatment layer. It is preferable for the silica layer to have a layer thickness of 0.1-10 μM.

A camera module includes an imaging lens assembly, an image sensor and an optical plate. The image sensor is disposed on an image surface of the imaging lens assembly. The optical plate is disposed between the imaging lens assembly and the image sensor, and includes a substrate and at least one anti-reflection layer. The substrate has an object-side surface and an image-side surface, the object-side surface faces towards an object side, the image-side surface faces towards an image side, and the object-side surface is parallel with the image-side surface. The at least one anti-reflection layer is disposed on the object-side surface or the image-side surface of the substrate, the anti-reflection layer includes a nanocrystal structure layer and an optical-connecting layer, wherein the nanocrystal structure layer includes a metal oxide crystal, the optical-connecting layer connects the substrate and the nanocrystal structure layer.

A camera module includes an imaging lens assembly, an image sensor and an optical plate. The image sensor is disposed on an image surface of the imaging lens assembly. The optical plate is disposed between the imaging lens assembly and the image sensor, and includes a substrate and at least one anti-reflection layer. The substrate has an object-side surface and an image-side surface, the object-side surface faces towards an object side, the image-side surface faces towards an image side, and the object-side surface is parallel with the image-side surface. The at least one anti-reflection layer is disposed on the object-side surface or the image-side surface of the substrate, the anti-reflection layer includes a nanocrystal structure layer and an optical-connecting layer, wherein the nanocrystal structure layer includes a metal oxide crystal, the optical-connecting layer connects the substrate and the nanocrystal structure layer.

The spectacle lens includes a lens substrate; a multilayer film disposed on one surface of the lens substrate; and a multilayer film disposed on the other surface of the lens substrate, wherein an average reflectance within the wavelength range from 380 to 500 nm measured at least on one surface of the spectacle lens is 10.00% or more, and a reflectance measured at least on one surface of the spectacle lens is 5.00% or less in the entire range within the wavelength range from 400 to 780 nm.