Abstract: A composite functional polarized lens is a polarized lens in which lens substrate layers made of, for example, an allyl diglycol carbonate resin (produced by PPG Industries: CR-39), an urethane resin or other predetermined resin are integrally formed on both front and back surfaces of a polarizing film by way of insert molding, wherein a first lens substrate layer formed on the front surface of both the front and back surfaces of the polarizing film contains a light absorber which is an ultraviolet absorber, an infrared absorber, photochromic light absorber or a thermochromic light absorber as an additional component, and a second lens substrate layer formed on the back surface does not contain the light absorber.

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.

Abstract: A composite functional polarized lens is a polarized lens in which lens substrate layers made of, for example, an allyl diglycol carbonate resin (produced by PPG Industries: CR-39), an urethane resin or other predetermined resin are integrally formed on both front and back surfaces of a polarizing film by way of insert molding, wherein a first lens substrate layer formed on the front surface of both the front and back surfaces of the polarizing film contains a light absorber which is an ultraviolet absorber, an infrared absorber, photochromic light absorber or a thermochromic light absorber as an additional component, and a second lens substrate layer formed on the back surface does not contain the light absorber.

Abstract: A light-shielding lens which can cut ultraviolet or visible radiation having wavelengths of 430 nm and shorter or of 500 nm and shorter and which can sufficiently satisfy users' demand for its color. The lens contains 0.01 to 2 parts by mass of an indole-based ultraviolet absorbing dye having a melting point of 140 to 150° C., based on 100 parts by mass of a synthetic resin forming the lens, and preferably further contains an oil-soluble dye, whereby the lens can cut ultraviolet and visible radiation having wavelengths of 430 nm and shorter. Since the predetermined amount of the indole-based ultraviolet absorbing dye is sufficiently dissolved in the synthetic resin, it efficiently reveals its expected function. The lens can thus cut ultraviolet and visible radiation having wavelengths of 430 nm and shorter, or even 500 nm and shorter, while keeping highly transparent light color.

Abstract: The invention is directed to a spectacle lens which contains an infrared absorbing agent, and which shows excellent infrared absorbing properties by minimizing deterioration and decomposition of the infrared absorbing agent, and as well as a method of producing such an optical lens. This infrared absorbing spectacle lens is formed by adding an infrared absorbing dye to a polyurethane resin obtained by addition polymerization of a prepolymer produced by reacting a polyisocyanate with a polyhydroxy compound, and an aromatic polyamine. The lens shows excellent infrared absorbing properties with no deterioration or decomposition of the infrared absorbing agent. It is possible to prevent deterioration of the infrared absorbing agent due to additives such as peroxides (including polymerization catalysts and initiators such as benzoyl peroxide), as well as increased absorption of visible light, which was difficult with conventional resin materials for molding.

Abstract: In a laminated glass lens for spectacles, first and second glass lens substrates (each about 1 mm thick) are bonded together with an adhesive agent layer therebetween. A liquid substance of a solventless adhesive to which a pigment containing a tetraazaporphyrin compound is added together with an organic solvent is dropped onto the first glass lens substrate in the form of a droplet, and the second glass lens substrate is pressed against the first glass lens substrate with a relatively light load to spread the droplet into a layer having a thickness of 5 to 150 micrometers, and allowing the thus spread layer to be cured as the adhesive 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.

Abstract: A light-shielding lens which can cut ultraviolet or visible radiation having wavelengths of 430 nm and shorter or of 500 nm and shorter and which can sufficiently satisfy users' demand for its color. The lens contains 0.01 to 2 parts by mass of an indole-based ultraviolet absorbing dye having a melting point of 140 to 150° C., based on 100 parts by mass of a synthetic resin forming the lens, and preferably further contains an oil-soluble dye, whereby the lens can cut ultraviolet and visible radiation having wavelengths of 430 nm and shorter. Since the predetermined amount of the indole-based ultraviolet absorbing dye is sufficiently dissolved in the synthetic resin, it efficiently reveals its expected function. The lens can thus cut ultraviolet and visible radiation having wavelengths of 430 nm and shorter, or even 500 nm and shorter, while keeping highly transparent light color.

Abstract: An infrared absorbing polarized eyeglass lens substrate includes a polarizing element including a polarizing film and a polyurethane resin material containing an infrared absorbing agent and covering both surfaces of the polarizing film, and an eyeglass lens substrate made of a polyurethane resin not containing an infrared absorbing agent and configured to be ground for adjusting lens power. The polarizing element is superposed on one side of the eyeglass lens substrate and integrated therewith by insert molding which accompanies polymerization reaction of the polyurethane resin material.

Abstract: [Problems] The invention provides a plastic lens for eyeglasses by using diethylene glycol bisallyl carbonate as a lens material and which is made to have a main absorption peak in a wavelength range of 565 nm to 605 nm by mixing a coloring agent in which a visible light-absorption spectroscopic spectrum contains an azaporphyrin compound and to be durable for use as eyeglasses and polarized eyeglasses owing to the good antiglare and visibility properties of the coloring agent. [Solving means] The eyeglass lens made of an allyl diglycol carbonate resin which has a main absorption peak of visible light spectroscopic transmittance in a wavelength range of 565 nm to 605 nm as shown in FIG. 1 is obtained by using diethylene glycol bisallyl carbonate as a lens material, mixing an organic coloring agent containing a tetraazaporphyrin compound, mixing a peroxyester type peroxide or a peroxyketal type peroxide with a 10 hour-half life temperature of 90 to 110° C.

Abstract: In order for the discolored laminated glass lens for spectacles to have excellent glare-prevention characteristics, a tetraazaporphyrin compound is combined at a required concentration with an extremely thin adhesive agent layer in a manner so that unevenness of color does not arise, and of the light-absorbing ability expected for a laminated lens for spectacles. There is sufficient shielding of light in the vicinity of the 585 nm wavelength. In the laminated glass lens for spectacles, two glass lens substrates (2 and 3) (each about 1 mm thick) are bonded together with an adhesive agent layer (1) therebetween. A liquid substance of a solventless adhesive to which a pigment containing a tetraazaporphyrin compound is added together with an organic solvent is dropped onto the glass lens substrate (2) in the form of a droplet (1a; shown by phantom line in FIG.

Abstract: An infrared absorbing polarized eyeglass lens substrate includes a polarizing element including a polarizing film and a polyurethane resin material containing an infrared absorbing agent and covering both surfaces of the polarizing film, and an eyeglass lens substrate made of a polyurethane resin not containing an infrared absorbing agent and configured to be ground for adjusting lens power. The polarizing element is superposed on one side of the eyeglass lens substrate and integrated therewith by insert molding which accompanies polymerization reaction of the polyurethane resin material.

Abstract: [Problems] The invention provides a plastic lens for eyeglasses by using diethylene glycol bisallyl carbonate as a lens material and which is made to have a main absorption peak in a wavelength range of 565 nm to 605 nm by mixing a coloring agent in which a visible light-absorption spectroscopic spectrum contains an azaporphyrin compound and to be durable for use as eyeglasses and polarized eyeglasses owing to the good antiglare and visibility properties of the coloring agent. [Solving means] The eyeglass lens made of an allyl diglycol carbonate resin which has a main absorption peak of visible light spectroscopic transmittance in a wavelength range of 565 nm to 605 nm as shown in FIG. 1 is obtained by using diethylene glycol bisallyl carbonate as a lens material, mixing an organic coloring agent containing a tetraazaporphyrin compound, mixing a peroxyester type peroxide or a peroxyketal type peroxide with a 10 hour-half life temperature of 90 to 110° C.

Abstract: The object is to provide a spectacle lens which contains an infrared absorbing agent, and which shows excellent infrared absorbing properties by minimizing deterioration and decomposition of the infrared absorbing agent, and to provide a method of producing such an optical lens. This infrared absorbing spectacle lens is formed by adding an infrared absorbing dye to a polyurethane resin obtained by addition polymerization of a prepolymer produced by reacting a polyisocyanate with a polyhydroxy compound, and an aromatic polyamine. show excellent infrared absorbing properties with no deterioration or decomposition of the infrared absorbing agent. It is possible to prevent deterioration of the infrared absorbing agent due to additives such as peroxides (including polymerization catalysts and initiators such as benzoyl peroxide), as well as increased absorption of visible light, which was difficult with conventional resin materials for molding.

Abstract: An impact strength synthetic resin lens is provided in which transparency of a synthetic resin lens material of a polyurethane and releasability are improved to improve productivity and no stria are produced. The impact strength synthetic resin lens is manufactured by casting and curing a polyurethane resin composition which a polyurethane resin composition for molding optical lenses, comprising, as essential components, a prepolymer obtained by reacting an alicyclic polyisocyanate having two or more isocyanate groups with a polyol having two or more hydroxy groups, an internal mold lubricant and a decolored aromatic diamine.

Abstract: A polyurethane resin composition for casting is provided which for use as a molding material for optical lenses, resistance to discoloration and durability are excellent and the pot life is long enough take time for casting process. It comprises a polyisocyanate, a polyhydroxy compound and an aromatic polyamine. The aliphatic polyisocyanate is 4,4′-methylene-bis(cyclohexyl isocyanate) or isophorone diisocyanate, the polyhydroxy compound is a polyether diol or polyester diol having an average molecular weight of 700-1200 or their mixture, and the aromatic polyamine is 4,4′-methylene-bis(2-chloroaniline).

Abstract: An impact strength synthetic resin lens is provided in which transparency of a synthetic resin lens material of a polyurethane and releasability are improved to improve productivity and no stria are produced. The impact strength synthetic resin lens is manufactured by casting and curing a polyurethane resin composition which a polyurethane resin composition for molding optical lenses, comprising, as essential components, a prepolymer obtained by reacting an alicyclic polyisocyate having two or more isocyanate groups with a polyol having two or more hydroxy groups, an internal mold lubricant and a decolored aromatic diamine.

Abstract: A polyurethane resin composition for casting is provided which for use as a molding material for optical lenses, resistance to discoloration and durability are excellent and the pot life is long enough take time for casting process. It comprises a polyisocyanate, a polyhydroxy compound and an aromatic polyamine. The aliphatic polyisocyanate is 4,4′-methylene-bis(cyclohexyl isocyanate) or isophorone diisocyanate, the polyhydroxy compound is a polyether diol or polyester diol having an average molecular weight of 700-1200 or their mixture, and the aromatic polyamine is 4,4′-methylene-bis(2-chloroaniline).

Abstract: A polarizing film or composite which can eliminate glare of the light reflected by an object and passing therethrough while maintaining the original color of the object. The polarizing film is color-adjusted so that the color coordinates L, a and b in the UCS color space, where L is the color brightness divided into 0 to 100 sections and in terms of tristimulus values X, Y and Z in the standard colorimetric system CIE, L=100Y.sup.1/2, a=175 (1.02X-Y) Y.sup.1/2, b=70 (Y-0.847Z) y.sup.1/2, will be 22.ltoreq.L.ltoreq.70, -2.0.ltoreq.a.ltoreq.2.0, -2.0.ltoreq.b.ltoreq.2.0, that the light transmittance in the wavelength range of 410-710 nm will be within +30% of its average, and that the light transmittance in the wavelength range of 410-750 nm will be not more than 2% when two of said polarizing films are put one upon the other so that their polarizing axes extend perpendicularly to each other.