Abstract: An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.

Abstract: An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.

Abstract: There is provide an optical filter suppressed in incidence angle dependence and having high visible light transmittance. The optical filter includes: an absorption layer containing a first near-infrared absorbent (DA) having a maximum absorption wavelength ?(DA_Tmin) in wavelengths of 685 to 715 nm and a second near-infrared absorbent (DB) having a maximum absorption wavelength ?(DB_Tmin) in wavelengths of 705 to 725 nm or wavelengths of more than 725 nm and 900 nm or less on a side of a wavelength longer than the maximum absorption wavelength ?(DA_Tmin), and satisfying specific light absorption characteristics; and a reflection layer including a dielectric multilayer film satisfying specific reflection characteristics in wavelengths of 700 to 1150 nm, wherein a transmittance of the reflection layer in a boundary region of visible light and near-infrared light and a transmittance of the absorption layer have a specific relation.

Abstract: Provided is an infrared cut filter including: an infrared absorbing layer of a transparent resin containing an infrared absorber; and a selected wavelength cut layer stacked on the infrared absorbing layer, wherein the following requirements are satisfied. (i) In a spectral transmittance curve for an incident angle of 0°, an average transmittance in a 450-600 nm range is 80% or more, a transmittance in a 700-1200 nm range is 2.0% or less, and D0 represented by the following expression is less than 0.04. D0 (%/nm)=(Tmax·0?Tmin·0)/(?(Tmax·0)??(Tmin·0)) (ii) wherein a spectrum transmittance curve for an incident angle of 30°, an average transmittance in the 450 to 600 nm range is 80% or more, a transmittance in the 700-1200 nm range is 2.0% or less, and D30 represented by the following expression is less than 0.04.

Abstract: An electrochromic element which suppresses ripples in a color-reduction state and with which good visible light transmittance can be obtained is provided. An electrochromic element 100 includes: a transparent electrolyte layer 110; a pair of solid electrochromic layers which sandwiches the transparent electrolyte layer and is constituted by a pair of a reduction coloring-type solid electrochromic layer 120 and an oxidation coloring-type solid electrochromic layer 130 opposing each other, and a pair of transparent conductive films 140, where in the thickness and refractive indexe with respect to light at a wavelength of 550 nm about the transparent electrolyte layer 140, the reduction coloring-type solid electrochromic layer 120 and the oxidation coloring-type solid electrochromic layer 130, those values are provided so as to satisfy predetermined relations to suppress the ripples.

Abstract: There is provided an optical element which is an apodized filter capable of externally controlling an optical characteristic and stable over a long period. An optical element 100 is an optical element including: a transparent electrolyte layer 110; a pair of solid electrochromic layers which sandwiches the transparent electrolyte layer 110; and further a pair of transparent conductive films 140 which sandwiches a pair of the solid electrochromic layer, wherein a pair of the solid electrochromic layers is constituted by a reduction coloring-type solid electrochromic layer 120 and an oxidation coloring-type solid electrochromic layer 130 opposing each other, the optical element including: an apodized characteristic in which transmittance increases gradually from an outer periphery toward a center in a plane orthogonal to a thickness direction of the transparent electrolyte layer 110.

Abstract: There is provide an optical filter suppressed in incidence angle dependence and having high visible light transmittance. The optical filter includes: an absorption layer containing a first near-infrared absorbent (DA) having a maximum absorption wavelength ?(DA_Tmin) in wavelengths of 685 to 715 nm and a second near-infrared absorbent (DB) having a maximum absorption wavelength ?(DB_Tmin) in wavelengths of 705 to 725 nm or wavelengths of more than 725 nm and 900 nm or less on a side of a wavelength longer than the maximum absorption wavelength ?(DA_Tmin), and satisfying specific light absorption characteristics; and a reflection layer including a dielectric multilayer film satisfying specific reflection characteristics in wavelengths of 700 to 1150 nm, wherein a transmittance of the reflection layer in a boundary region of visible light and near-infrared light and a transmittance of the absorption layer have a specific relation.

Abstract: The present invention relates to an optical filter, a solid-state imaging element and an imaging device lens which contain a near infrared ray absorbing layer having a specific near infrared ray absorbing dye dispersed in a transparent resin having a refractive index of 1.54 or more, and also relates to an imaging device containing the solid-state imaging element or the imaging device lens. The near infrared ray absorbing layer has a transmittance of visible light of from 450 to 600 nm of 70% or more, a transmittance of light in a wavelength region of from 695 to 720 nm of not more than 10%, and an amount of change of transmittance of not more than ?0.8.

Abstract: There is provided an optical element which is an apodized filter capable of externally controlling an optical characteristic and stable over a long period. An optical element 100 is an optical element including: a transparent electrolyte layer 110; a pair of solid electrochromic layers which sandwiches the transparent electrolyte layer 110; and further a pair of transparent conductive films 140 which sandwiches a pair of the solid electrochromic layer, wherein a pair of the solid electrochromic layers is constituted by a reduction coloring-type solid electrochromic layer 120 and an oxidation coloring-type solid electrochromic layer 130 opposing each other, the optical element including: an apodized characteristic in which transmittance increases gradually from an outer periphery toward a center in a plane orthogonal to a thickness direction of the transparent electrolyte layer 110.

Abstract: An optical filter including a near infrared absorbing layer on a glass substrate, in which adhesiveness between the glass substrate and the near infrared absorbing layer is firm, high reliability is enabled in uses under a high temperature and high humidity environment, and manufacturing yield is secured, and a high reliability solid-state imaging device having the optical filter are provided. An optical filter includes: a glass substrate; and a near infrared absorbing layer formed on one principal surface of the glass substrate, wherein the near infrared absorbing layer is obtained by reacting a composition for forming the near infrared absorbing layer on the glass substrate and the composition contains a transparent resin having a fluorene skeleton and a reactivity group; a near infrared absorbing dye; and a silane coupling agent and/or oligomer thereof having a hydrolyzable group and a functional group which have reactivity for the reactivity group.

Abstract: The present invention relates to an optical filter, a solid-state imaging element and an imaging device lens which contain a near infrared ray absorbing layer having a specific near infrared ray absorbing dye dispersed in a transparent resin having a refractive index of 1.54 or more, and also relates to an imaging device containing the solid-state imaging element or the imaging device lens. The near infrared ray absorbing layer has a transmittance of visible light of from 450 to 600 nm of 70% or more, a transmittance of light in a wavelength region of from 695 to 720 nm of not more than 10%, and an amount of change of transmittance of not more than ?0.8.

Abstract: The present invention relates to an optical filter, a solid-state imaging element and an imaging device lens which contain a near infrared ray absorbing layer having a specific near infrared ray absorbing dye dispersed in a transparent resin having a refractive index of 1.54 or more, and also relates to an imaging device containing the solid-state imaging element or the imaging device lens. The near infrared ray absorbing layer has a transmittance of visible light of from 450 to 600 nm of 70% or more, a transmittance of light in a wavelength region of from 695 to 720 nm of not more than 10%, and an amount of change of transmittance of not more than ?0.8.

Abstract: Provided is an infrared cut filter including: an infrared absorbing layer of a transparent resin containing an infrared absorber; and a selected wavelength cut layer stacked on the infrared absorbing layer, wherein the following requirements are satisfied. (i) In a spectral transmittance curve for an incident angle of 0°, an average transmittance in a 450-600 nm range is 80% or more, a transmittance in a 700-1200 nm range is 2.0% or less, and D0 represented by the following expression is less than 0.04. D0 (%/nm)=(Tmax·0?Tmin·0)/(?(Tmax·0)??(Tmin·0)) (ii) wherein a spectrum transmittance curve for an incident angle of 30°, an average transmittance in the 450 to 600 nm range is 80% or more, a transmittance in the 700-1200 nm range is 2.0% or less, and D30 represented by the following expression is less than 0.04.

Abstract: An infrared cut filter is disclosed. This filter includes a transparent substrate and one or more infrared absorbing layers containing an infrared absorbing compound on at least one principal surface of the transparent substrate, wherein a transmittance at a wavelength of 1200 nm measured in a stack composed of the transparent substrate and the one or more infrared absorbing layers is 10% or less.

Abstract: The present invention relates to an optical filter, a solid-state imaging element and an imaging device lens which contain a near infrared ray absorbing layer having a specific near infrared ray absorbing dye dispersed in a transparent resin having a refractive index of 1.54 or more, and also relates to an imaging device containing the solid-state imaging element or the imaging device lens. The near infrared ray absorbing layer has a transmittance of visible light of from 450 to 600 nm of 70% or more, a transmittance of light in a wavelength region of from 695 to 720 nm of not more than 10%, and an amount of change of transmittance of not more than ?0.

Abstract: An optical filter including a near infrared absorbing layer on a glass substrate, in which adhesiveness between the glass substrate and the near infrared absorbing layer is firm, high reliability is enabled in uses under a high temperature and high humidity environment, and manufacturing yield is secured, and a high reliability solid-state imaging device having the optical filter are provided. An optical filter includes: a glass substrate; and a near infrared absorbing layer formed on one principal surface of the glass substrate, wherein the near infrared absorbing layer is obtained by reacting a composition for forming the near infrared absorbing layer on the glass substrate and the composition contains a transparent resin having a fluorene skeleton and a reactivity group; a near infrared absorbing dye; and a silane coupling agent and/or oligomer thereof having a hydrolyzable group and a functional group which have reactivity for the reactivity group.

Abstract: Dialkoxymagnesium granules having spherical or ellipsoidal particle shapes with a mean particle size, represented by D50, in the range of 60-200 ?m, a bulk specific gravity of 0.2-0.7 g/ml, having numerous interior pores with pore sizes of 0.1-5 ?m as observed with a TEM, and having a particle size distribution, represented by (D90?D10)/D50, of no greater than 1. Granular metallic magnesium and an alcohol are added continuously or intermittently in divided portions to a reaction system of the metallic magnesium and alcohol while circulating the alcohol for reaction. Large-sized dialkoxymagnesium granules are obtained with a uniform particle size distribution and containing no fine powder.

Abstract: To provide a liquid crystal alignment film having a sufficient alignment-regulating power and high resistance against blue laser beam and having, at the same time, excellent adhesion, and an optical element using it. A liquid crystal alignment film obtainable by bonding, by chemisorption to a substrate, an alignment-regulating precursor which undergoes anisotropic decomposition by irradiation with polarized ultraviolet light, and irradiating the alignment-regulating precursor bonded to the substrate, with polarized ultraviolet light, to let it undergo anisotropic decomposition and exhibit an alignment-regulating power.

Abstract: To provide a polymer compound capable of forming an alignment film which has a sufficient aligning performance to a liquid crystalline compound and which is excellent also in adhesion with an optical anisotropic film obtainable by polymerizing a liquid crystalline compound in an aligned state, and a composition containing it, as well as an alignment film obtainable by using such a composition, an optical element and an optical information writing/reading device. Provided is a polymer compound comprising polymerized units derived from a fumaric acid diester and polymerized units having a radical polymerizable group in a side chain. By using this polymer compound, an alignment film is prepared. An optical element having this alignment film and an optical anisotropic film is used as a retardation plate 4 having mechanical strength and heat resistance, and good reliability without peeling. An optical information writing/reading device is constituted by using it.

Abstract: The present invention provides an optical anisotropic material having a good light stability, and provides a di(meth)acrylate compound represented by the following formula (1) and a polymerizable liquid crystalline composition that are suitable for the production of the optical anisotropic material. Further, the present invention provides an optical element having a good light stability and an optical information writing/reading device using the same.