Abstract: A unitary lens structure is provided which is employable with spectacles as well as goggles and safety eyewear. The lens is formed as a unitary structure with projections having surfaces which are machinable for prescription eyewear extending from a first side surface of a larger shield. Damage from cracking of the shield at the intersections with the projection perimeters is prevented by non linear connections between the two surfaces.

Abstract: The present disclosure relates to a filter unit, a filter selection method, and an imaging device that allow continuously changing a transmittance of an ND filter and switching between filters to be performed more easily. A disk provided with a plurality of filters including an ND filter having a continuously variable transmittance is rotated to cause a filter corresponding to a rotational orientation of the disk among the plurality of filters provided on the disk to be arranged on an optical axis of incident light toward an image sensor. The present disclosure can be applied to, for example, a filter unit, an imaging device, electronic equipment, a filter selection method, a program, or the like.

Abstract: An optical filter and a method for forming the same are provided. The optical filter includes a substrate and a plurality of filter stacks formed on the substrate. Each of the plurality of filter stacks includes a higher-refractive-index layer, a medium-refractive-index layer, and a lower-refractive-index layer. The higher-refractive-index layer has a first refractive index of higher than 3.5. The medium-refractive-index layer is disposed on the higher-refractive-index layer. The medium-refractive-index layer has a second refractive index higher than 2.9 and lower than the first refractive index. The lower-refractive-index layer is disposed on the medium-refractive-index layer. The lower-refractive-index layer has a third refractive index lower than the second refractive index.

Abstract: A lens is provided that has an improved optical configuration in order to provide enhanced off-axis optical performance by tending to reduce, eliminate, or minimize first order optical distortion. Embodiments may be used in non-corrective or corrective unitary or dual lens eyewear, for example in combination with a frame to support the lens in a path of a straight ahead line of sight forming a center axis of an eye of a typical wearer. The lens may comprise a lens body. The lens body may comprise a surface having a spheric, toric, cylindrical or freeform geometry and another surface having a freeform geometry. A lens thickness is defined between the surfaces. A prismatic power of the lens is improved, particularly for off-axis viewing angles.

Abstract: A coated article includes a substrate having a major surface, and an optical coating disposed on the major surface of the substrate. At least a portion of the optical coating includes a residual compressive stress of about 50 MPa or more. The coated article has strain-to-failure of about 0.5% or more as measured by a Ring-on-Ring Tensile Testing Procedure. The coated article has an average photopic transmission of about 80% or greater.

Abstract: This disclosure relates to an antireflection film, as well as its use on a substrate (3) to decrease a fracture of light striking the substrate (3) reflected by said substrate (3), wherein said coating is formed of a transparent first layer (1) applied on the substrate (3) and a transparent second layer (2) on said first layer (1). The essence of the solutions according to this disclosure is that thickness (d1) of the first layer (1) ranges from 10 to 70 nm and refractive index (n1) of said first layer (1) satisfies the relation 1.05<n1<1.35 within the wavelength range of 375 to 1000 nm, and wherein thickness (d2) of the second layer (2) ranges from 30 to 100 nm and refractive index (n2) of said second layer (2) satisfies the relation 1.25<n2<1.5 within the wavelength range of 375 to 1000 nm, and wherein n1<n2 also holds.

Abstract: Embodiments in accordance with the present invention encompass self-imagable polymer compositions containing a colorant which are useful for forming films that can be patterned to create structures for color filters and microlens having applications in a variety of microelectronic devices, optoelectronic devices and displays, such as for example image sensors. The compositions of this invention can be tailored to form positive tone images for forming an array of images, which can be thermally transformed into an array of microlens. The images thus formed can then be used in color filter applications.

Abstract: A head-mounted display (HMD) presented herein comprises an electronic display and an optical assembly. The electronic display is configured to emit image light. The optical assembly is configured to direct the image light to an eye-box of the HMD corresponding to a location of a user's eye. The optical assembly includes a multifocal optical element, e.g., a bifocal optical element. A first portion of the multifocal optical element has a first optical power that is associated with a first image plane. The second portion of the multifocal optical element has a second optical power different than the first optical power, the second portion associated with a second image plane.

Abstract: An embodiment includes a platform shape memory polymer system. Such an embodiment exhibits a blend of tunable, high performance mechanical attributes in combination with advanced processing capabilities and good biocompatibility. A post-polymerization crosslinking synthetic approach is employed that combines polyurethane and thiol-ene synthetic processes. Other embodiments are described herein.

Abstract: The invention relates to a barrier adhesive mass having high breakthrough times for water and also providing a good adhesive performance. This is achieved by a barrier adhesive mass comprising at least one elastomer and at least one reactive resin, and is characterised in that the barrier adhesive mass comprises at least one polymer G containing at least two functions suitable for constructing a polymer, as well as at least two hydrolysable silyl groups. The invention also relates to an adhesive tape comprising a barrier adhesive mass according to the invention, and to the use of an adhesive mass of this type for sealing electronic assemblies.

Abstract: A new laminated glass structure for automotive glazing, architectural window and other applications that includes two sheets of relatively thin, optionally chemically strengthened glass, such as Corning® Gorilla® Glass, with a composite interlayer structure that includes at least one relatively stiff layer having relatively high Young's modulus of 50 MPa or higher and a relatively softer polymer layer having a relatively low Young's modulus of 20 MPa or lower.

Abstract: Embodiments of thermally and chemically strengthened glass-based articles are disclosed. In one or more embodiments, the glass-based articles may include a first surface and a second surface opposing the first surface defining a thickness (t), a first CS region comprising a concentration of a metal oxide that is both non-zero and varies along a portion of the thickness, and a second CS region being substantially free of the metal oxide of the first CS region, the second CS region extending from the first surface to a depth of compression of about 0.17·t or greater. In one or more embodiments, the first surface is flat to 100 ?m total indicator run-out (TIR) along any 50 mm or less profile of the first surface. Methods of strengthening glass sheets are also disclosed, along with consumer electronic products, laminates and vehicles including the same are also disclosed.

Abstract: A vehicle includes a door. A transparency is coupled to the door including an exterior substrate and an interior substrate. An interlayer is positioned between the exterior substrate and the interior substrate. A polarizer is positioned on the interlayer. An indicium is positioned on the interlayer. A light source is positioned to emit light onto the indicium.

Abstract: A curved transparent substrate includes an alkali-free base layer having a curved shape and a compression applying layer compression applying layer which is disposed on a surface of the alkali-free base layer and applies a compression to the alkali-free base layer where an alkali ion content of the compression applying layer is greater than an alkali ion content of the alkali-free base layer.

Abstract: There is provided a dispersion composition capable of forming a film being excellent in surface conditions, the dispersion composition containing metal oxide particles (A) having a primary particle diameter of 1 nm to 100 nm, a polymer compound (B) having an acid value of less than 120 mgKOH/g, which is represented by the following Formula (1), and a solvent (C).

Abstract: An ophthalmic device is formed by additive fabrication, the optical device having an optical surface with a surface roughness on the order of less than 10 microns. A method is provided for making an ophthalmic device including an optical surface having a surface roughness of less than 10 microns by depositing on a stage in a first relative position a first lamina of particulates having a size less than 10 microns and in select configurations less than two microns and certain configurations less than one micron, and, synergistically stimulating the first lamina of particulates to form a first solidified layer.

Abstract: Ion exchangeable glasses having coefficients of thermal expansion (CTE) at least about 90×10?7° C.?1. The glasses undergo rapid ion exchange, for example, in a molten KNO3 salt bath to a depth of layer of greater than 30 microns in less than 2 hours at temperatures of 370° C. to 390° C. When ion-exchanged to a depth of layer between 30 to 50 microns, the glasses exhibit a Vickers median/radial crack initiation threshold exceeding 30 kilograms force (kgf). The glasses are fusion formable and, in some embodiments, compatible with zircon.

Abstract: Embodiments of thermally and chemically strengthened glass-based articles are disclosed. In one or more embodiments, the glass-based articles may include a first surface and a second surface opposing the first surface defining a thickness (t), a first CS region comprising a concentration of a metal oxide that is both non-zero and varies along a portion of the thickness, and a second CS region being substantially free of the metal oxide of the first CS region, the second CS region extending from the first surface to a depth of compression of about 0.17·t or greater. In one or more embodiments, the first surface is flat to 100 ?m total indicator run-out (TIR) along any 50 mm or less profile of the first surface. Methods of strengthening glass sheets are also disclosed, along with consumer electronic products, laminates and vehicles including the same are also disclosed.

Abstract: An aspect of the present invention relates to an eyeglass lens comprising a lens substrate and a vapor-deposited film either directly or indirectly on the lens substrate, wherein the vapor-deposited film is an oxide film of metal selected from the group consisting of zirconium and tantalum, with a proportion accounted for by regions observed in a streaky shape, in a columnar shape, or in a lump shape in a cross-sectional image of the vapor-deposited film obtained by a transmission electron microscope of equal to or less than 20%.

Abstract: Methods and apparatus for separating substrates are disclosed, as are articles formed from the separated substrates. A method of separating a substrate having first and second surfaces includes directing a beam of laser light to pass through the first surface and, thereafter, to pass through the second surface. The beam of laser light has a beam waist located at a surface of the substrate or outside the substrate. Relative motion between the beam of laser light and the substrate is caused to scan a spot on a surface of the substrate to be scanned along a guide path. Portions of the substrate illuminated within the spot absorb light within the beam of laser light so that the substrate can be separated along the guide path.

Abstract: In one aspect, a protective window comprising a first transparent member comprising a polymer; and a protective layer on a first surface of the first transparent member and comprising silsequioxane is provided.

Abstract: A laminate body includes a base material, a film-like or a membrane-like undercoat layer that is formed in at least a portion of the outer surface of the base material, and an atomic layer deposition film that is formed on a surface opposite to a surface coming into contact with the base material among both surfaces of the undercoat layer in the thickness direction thereof. At least a portion of precursors of the atomic layer deposition film bind to the undercoat layer, and the atomic layer deposition film is formed into a membrane shape covering the undercoat layer.

Abstract: Chemically strengthened glass articles having at least one deep compressive layer extending from a surface of the article to a depth of layer DOL of about 130 ?m up to about 175 ?m or, alternatively, to a depth of compression (DOC) in a range from about 90 ?m to about 120 ?m within the article. The compressive layer has a stress profile that includes a first substantially linear portion extending from a relatively shallow depth to the DOL or DOC and a second portion extending from the surface to the shallow depth. The second portion is substantially linear at a depth from 0 ?m to 5 ?m and has a steeper slope than that of the first portion of the profile. Methods of achieving such stress profiles are also described.

Abstract: To provide an optical member, formed without generating cracks in a hard coat layer of desired film thickness, and a method of manufacturing an optical member that permits the manufacturing of the above optical member.

Abstract: A sensor device and a manufacturing method thereof are provided in which no resin seal is used when a sensor is packaged, a change in connection relation according to a change in specifications of the control IC and others is facilitated when a control IC is packaged together with the sensor and high reliability is kept. The sensor device of the present invention includes a substrate containing an organic material and being formed a wiring, a sensor arranged on the substrate and electrically connected to the wiring, and a package cap arranged on the substrate and containing an organic material and covering the sensor, and the inside of the package cap is hollow.

Abstract: Disclosed herein are coating materials and methods for applying a top-layer coating that is durable, abrasion resistant, highly transparent, hydrophobic, low-friction, moisture-sealing, anti-soiling, and self-cleaning to an existing conventional high temperature anti-reflective coating. The top coat imparts superior durability performance and new properties to the under-laying conventional high temperature anti-reflective coating without reducing the anti-reflectiveness of the coating. Methods and data for optimizing the relative thickness of the under-layer high temperature anti-reflective coating and the top-layer thickness for optimizing optical performance are also disclosed.

Abstract: A sensor device and a manufacturing method thereof are provided in which no resin seal is used when a sensor is packaged, a change in connection relation according to a change in specifications of the control IC and others is facilitated when a control IC is packaged together with the sensor and high reliability is kept. The sensor device of the present invention includes a substrate containing an organic material and being formed a wiring, a sensor arranged on the substrate and electrically connected to the wiring, and a package cap arranged on the substrate and containing an organic material and covering the sensor, and the inside of the package cap is hollow.

Abstract: Ophthalmic lens including a base of polymeric material with a coating having an interferential, anti-reflective, anti-iridescent and infrared filter multiple layer structure. An interphase, a first layer (of 91-169 nm) with a refraction index higher than 1.8, a second layer (of 128-248 nm) with a refraction index lower than 1.65, a third layer (of 73-159 nm) with a refraction index higher than 1.8 and a fourth layer (of 40-138 nm) with a refraction index lower than 1.8. A total thickness of the multiple layer structure is less than 600 nm. The structure can have intermediate layers with intermediate refraction indices, in which case a doublet of two adjacent layers that fulfil the thicknesses above is replaced by a triplet so that the thickness and an optical thickness of the triplet differ from those of the doublet by less than 5%, respectively.

Abstract: Embodiments of the present invention relate to a multifocal lens having a diffractive optical power region and a progressive optical power region. Embodiments of the present invention provide for the proper alignment and positioning of each of these regions, the amount of optical power provided by each of the regions, the optical design of the progressive optical power region, and the size and shape of each of the regions. The combination of these design parameters allows for an optical design having less unwanted astigmatism and distortion as well as both a wider channel width and a shorter channel length compared to conventional PALs. Embodiments of the present invention may also provide a new, inventive far-intermediate distance zone and may further provide for increased vertical stability of vision within a zone of the lens.

Abstract: In a plastic optical product, an optical multilayer film having a seven layer structure is formed on a surface of a plastic substrate directly or with an interlayer interposed therebetween. In the seven layer structure of the optical multilayer film, a layer on the plastic substrate side is a low refractive index layer, and the low refractive index layers and high refractive index layers are alternately disposed. At least the high refractive index layer at the center of the seven layer structure contains substoichiometric titanium oxide. In a plastic lens for spectacles belonging to such a plastic optical product, the plastic substrate is a plastic lens substrate for spectacles, the interlayer is a hard coat film, and the optical multilayer film is an anti-reflective film.

Abstract: The present invention is drawn to an optical article comprising: (a) a transparent optical polymer substrate, (b) a transparent intermediate abrasion-resistant coating obtained from at least one epoxysilane by a sol-gel process, and (c) a transparent outer coating comprising a polythiol-ene matrix obtained by curing a liquid monomer mixture comprising at least one polyfunctional thiol and at least one polyfunctional allyl monomer, said cured polythiol-ene matrix having a glass transition temperature comprised in the range from 40° C. to 70° C. and a thickness from 3.5 ?m to less than 10 ?m. It is also drawn to a method for preparing such an optical article and to a method for repairing scratches in such an optical article by heating.

Abstract: A contact lens and a method for manufacturing thereof are provided. The contact lens has a silicone contact lens base material and an amorphous carbon film formed in the silicone contact lens base material. The amorphous carbon film of the contact lens is formed by subjecting the silicone contact lens base material to a plasma polymerization under an atmosphere of a mixed gas comprising a hydrocarbon gas and an oxygen-containing gas. The contact lens has excellent oxygen permeability and a high refractive index.

Abstract: An aspect of the present invention relates to an eyeglass lens, which comprises an outermost layer in the form of a water-repellent vapor deposition film formed by vapor depositing a vapor deposition material in the form of a perfluoropolyether-modified silane compound denoted by general formula (I): wherein, in general formula (I), R1 denotes an alkyl group with 1 or 2 carbon atoms, x denotes 1 or 0, R2 denotes an alkoxy group with 1 or 2 carbon atoms, R3 denotes a hydrogen atom or a phenyl group, and n denotes an integer ranging from 10 to 40.

Abstract: To provide an optical member in which a patterned shape is visible when viewed from a prescribed angle without impeding the field of vision of the wearer, and a method of manufacturing an optical member permitting the manufacturing of such an optical member. The optical member of the present invention is characterized by comprising a lens substrate 2, a patterning layer 3 in which a prescribed shape has been patterned in a manner covering a portion of the lens substrate, and a hard coat layer 4 formed so as to cover the lens substrate and the patterning layer, and in that a refractive index of the lens substrate 2 is equal to a refractive index of the hard coat layer 4, and differs from a refractive index of the patterning layer 3 by equal to or more than 0.02.

Abstract: A heat-curable composition comprises—from 25 to 65% by weight of a mixture of epoxy-functional monomers, said mixture consisting of at least one polyfunctional epoxy monomer selected from monomers comprising from 4 to 8 glycidyl groups and/or cycloaliphatic epoxy groups, and at least one bi- or tri-functional epoxy monomer selected from monomers comprising two or three glycidyl groups and/or cycloaliphatic epoxy groups, —from 25 to 70% by weight of at least one organic solvent selected from glycol monoethers, —from 2.5 to 5% by weight, relative to the total weight of epoxyfunctional monomers (a) and (b), of at least one blocked strong acid catalyst, said heat-curable composition not containing any non-epoxyfunctional monomers, in particular not containing any acrylic, methacrylic or silane monomers.

Abstract: An optical component is an optical component including: a plastic base; and a multilayer film disposed on at least a surface having a greater curvature, of a front surface of the plastic base and a rear surface of the plastic base, wherein the multilayer film has a maximum reflectivity of 3% to 50% in a wavelength range of 380 nm to 780 nm.

Abstract: A polarized optical element comprising: an optical part made of polyurethane-based optical material; and a polarizing film integrally bonded to the optical part, wherein the polyurethane-based optical material comprises the reaction product of a liquid-phase material comprising: a) a liquid polyisocyanate or polyisocyanate prepolymer having a content of —NCO functional groups comprised between 5 and 50% by weight and an average functionality of 2 to 3, b) an isocyanate-reactive component comprising at least one organic compound containing at least two aromatic amine groups, and c) at least one organometallic catalyst.

Abstract: An optical element has a substrate body made from transparent plastic and a coating having multiple layers. The coating includes a hard lacquer layer adjoining the substrate. The coating has a diffusivity ensuring the absorption of water molecules passing through the coating in the substrate and the release of water molecules from the substrate through the coating from an air atmosphere on that side of the coating facing away from the substrate with a flow density which, proceeding from the equilibrium state of the quantity of water molecules absorbed in the substrate in an air atmosphere at 23° C. and 50% relative humidity, brings the setting of the equilibrium state of the quantity of water molecules absorbed in the substrate in an air atmosphere at 40° C. and 95% relative humidity within an interval not more than 10 h longer than for setting this equilibrium under corresponding conditions with an identical uncoated substrate.

Abstract: A coating composition includes a colloidal suspension of specific zirconia nano-particles, at least one epoxysilane and at least one catalyst. A method for preparing this composition, and its use for coating a transparent optical substrate, an optical article, such as an ophthalmic lens, including a transparent polymer substrate, especially an acrylic substrate, and a coating prepared from the composition, which is directly applied on the substrate, are also described.

Abstract: An ophthalmic lens includes: a transparent ophthalmic lens substrate made of organic glass; an adhesive layer covering at least one of the faces of the transparent substrate; a transparent film made of a thermoplastic polymer fixed to the transparent substrate via the adhesive layer; and an abrasion-resistant coating covering the transparent thermoplastic polymer film, characterized in that the ophthalmic lens has a minimum thickness at the center of less than 2 mm, preferably less than 1.5 mm and even more preferably less than 1.2 mm. Two processes for manufacturing such a lens and the use of an adhesive multilayer film to improve the impact strength of such a lens are also described.

Abstract: The optical article includes an optical substrate comprising a concave surface with a radius of curvature of equal to or greater than 350 mm on one side and a convex surface with a radius of curvature of equal to or greater than 120 mm on the other side, a first antifouling layer directly or through at least one additional layer on the concave surface, and a second antifouling layer directly or through at least one additional layer on the convex surface, and satisfies the conditions below: 0.01??L1?0.12 0.1??L2 ?L1<?L2 wherein ?L1 denotes a coefficient of static friction of a surface of the first antifouling layer, and ?L2 denotes a coefficient of static friction of a surface of the second antifouling layer.

Abstract: An antifouling film is introduced on a base of an optical product such that (1) an absolute value of a charged electrostatic potential is 2.00 kV or less, and (2) a surface peel strength is 0.10 N/19 mm or less. A hard coat film and an optical multilayer film are placed between the base of the optical product and the antifouling film. An antireflection film is provided as the optical multilayer film, and a base of a spectacle plastic lens is provided as the base of the optical product.

Abstract: An optical member includes a substoichiometric titanium oxide film formed by depositing substoichiometric titanium oxides in a vacuum chamber into which an oxygen gas for adjusting a vacuum is introduced. In the optical member, the film forming pressure p (Pa) in the vacuum chamber and the optical film thickness (a refractive index of 2.50, a wavelength of 500 nm) of the substoichiometric titanium oxide film have relations of (1) p?0.005, (2) optical film thickness ?0.500?, and (3) optical film thickness ?(0.001exp(905.73p)?0.050)? where exp is an exponential function with e as the base of the natural logarithm.

Abstract: A method for preparing an abrasion resistant optical article comprising: providing an optical article having at least one main face bearing an abrasion resistant coating;_positioning said optical article in a vacuum deposition chamber;_depositing a first inorganic layer comprising SiO2 onto and in direct contact with said abrasion resistant coating by vacuum evaporation of SiO2 and/or SiOx, with 1<x<2, in said vacuum chamber, the thickness of said first inorganic layer ranging from 10 to 100 nm, wherein oxygen is introduced inside said vacuum chamber during said evaporation; said deposition being conducted without ion assistance; depositing a second inorganic layer comprising SiO2 onto and in direct contact with said first inorganic layer by vacuum evaporation of SiO2 and/or SiOx, with 1<x<2, in said vacuum chamber, the thickness of said second inorganic layer ranging from 70 to 300 nm, wherein said deposition is conducted without ion assistance and the pressure in said vacuum chamber during the d

Abstract: The present invention pertains to a method for producing a colloidal suspension of zirconia particles, comprising the following successive steps: a) subjecting a mixture of zirconium oxychloride and an alkali metal halide in an aqueous solvent to hydrothermal treatment at a temperature above 150° C., b) separating the slurry obtained from the supernatant, and c) peptizing said slurry by adding a strong acid thereto, and d) desalting said slurry, for example by ultrafiltration, so as to form a colloidal suspension of zirconia. It also pertains to the transparent colloidal suspension obtainable by this method, and to an optical article, such as an ophthalmic lens, comprising a transparent polymer substrate and at least one coating prepared from a composition comprising said colloidal suspension.

Abstract: A product (30) for optical use and a method of using the product, which includes at least two splittable superposed layers, namely a transparent and flexible optical layer (31) suitable for sticking onto a lens of an eyeglass frame, and a first packaging layer (35) for packaging the optical layer and presenting stiffness greater than the stiffness of the optical layer so as to enable the product to be machined via a conventional appliance for shaping eyeglass lenses.

Abstract: The present invention is drawn to an optical article comprising: (a) a transparent optical polymer substrate, (b) a transparent intermediate abrasion-resistant coating obtained from at least one epoxysilane by a sol-gel process, and (c) a transparent outer coating comprising a polythiol-ene matrix obtained by curing a liquid monomer mixture comprising at least one polyfunctional thiol and at least one polyfunctional allyl monomer, said cured polythiol-ene matrix having a glass transition temperature comprised in the range from 40° C. to 70° C. and a thickness from 3.5 ?m to less than 10 ?m. It is also drawn to a method for preparing such an optical article and to a method for repairing scratches in such an optical article by heating.

Abstract: The present invention describes ophthalmic lens products comprising a multilayer wafer and an injection-molded polycarbonate inner portion. The multilayer wafer includes a dyed, photochromic or polarized layer between a tinted inner layer and an outer polymeric layer. The inner layer may be solid or gradient-tinted. The polycarbonate inner portion of the lens product is directly fused to the tinted inner layer of the multilayer wafer during injection molding. The invention further describes a method to produce a gradient-tinted polarized polycarbonate eyewear lens product by obtaining a multilayer wafer having an outer layer, an inner polycarbonate layer, and a polarized layer between the inner and outer layers, applying a gradient tint to the wafer's inner layer, placing the gradient tinted wafer within an injection-molding cavity, and injecting molten polycarbonate directly against the wafer's gradient-tinted layer to form the inner portion of the lens product and to fuse it to the wafer.

Abstract: A method for adhering a hard coat layer to an optical substrate is provided, includes providing an optical substrate, depositing a silicon oxide film on the optical substrate using vacuum deposition, applying a hard coat layer to the silicon oxide film for forming a hard-coated optical substrate, and curing the hard coat layer to form the hard-coated optical substrate. A hard-coated optical substrate includes an optical substrate, a hard coat layer, and a silicon oxide film intermediate the optical substrate and hard coat layer.

Abstract: A photochromic lens is proposed which can lose its color in a shorter period of time, and which is less likely to deteriorate when exposed to ultraviolet radiation. The photochromic lens is formed by dissolving 0.03 to 0.2 parts by mass of a spirooxazine photochromic compound in tetrahydrofuran, mixing the solution thus obtained into 100 parts by mass of a lens resin material so that the photochromic compound is uniformly dispersed in the resin material.