Abstract: A lens array includes a transparent substrate arranged on a plane perpendicular to an optical axis, first lenses, which are arranged in a main scanning direction with respect to an light incident on the transparent substrate, and which condense the light, light shielding portions arranged on the transparent substrate except in areas of the first lenses to shield the light, and second lenses, which are laminated on the first lenses, and which are made of a material with a wettability different from that of a material of the first lenses.

Abstract: A light blocking ink includes a light blocking material, a blue coloring material, and an ultraviolet-curable material. The light blocking ink may be employed in a microlens array unit to block stray light. The microlens array unit includes a substrate, a microlens array, and a light blocking film formed with the light blocking ink. The microlens array unit may be employed in an image processing apparatus.

Abstract: A light blocking ink includes a vinyl ether compound, an alicyclic epoxy compound, an oxetane compound, a light blocking material, and a photoacid generating agent. The light blocking ink may be employed in a microlens array unit to block stray light. The microlens array unit may be employed in an image processing apparatus.

Abstract: A lens array includes a transparent substrate arranged on a plane perpendicular to an optical axis, first lenses, which are arranged in a main scanning direction with respect to an light incident on the transparent substrate, and which condense the light, light shielding portions arranged on the transparent substrate except in areas of the first lenses to shield the light, and second lenses, which are laminated on the first lenses, and which are made of a material with a wettability different from that of a material of the first lenses.

Abstract: According to one embodiment, a lens array of this embodiment is equipped with a plurality of lenses formed on a substrate, and light-blocking films including a plurality of layers, are formed by using an ultraviolet curable ink deposited between the lenses.

Abstract: According to one embodiment, a lens array includes a substrate with a lens surface having a plurality of lenses and a side surface, and a light-blocking film that is arranged between the plurality of lenses on the lens surface. A curing light is provided to the lens surface as well as to the inside of the substrate through the side surface to cure the light-blocking film.

Abstract: According to one embodiment, a lens array is provided with a plurality of lenses, which are formed in an effective area of a substrate, a dam structure, which is formed in an outer periphery of the plurality of lenses, and light-blocking films, which are formed using an ink and positioned between the plurality of lenses and between the plurality of lenses and the dam structure.

Abstract: According to one embodiment, an aqueous inkjet ink includes a dispersion medium that contains water and a water-soluble polyhydric alcohol having a weight average molecular weight of 400 or more, and a pigment. The pigment accounts for less than 5 mass % of the total amount of the aqueous inkjet ink. The aqueous inkjet ink has viscosities (mPa·s) measured using a cone-plate type viscometer at 20 rpm and satisfying the following relationships: VA/VB?1.5 VA?10 mPa·s 3 mPa·s?VB?15 mPa·s, where VA is the viscosity at 30° C., and VB the viscosity at 45° C.

Abstract: According to one embodiment, an inkjet aqueous ink includes water, a pigment, a water-soluble organic solvent, a poorly water-soluble compound, a solubilizer that solubilizes the poorly water-soluble compound in water, and an acetylene glycol-based surfactant. The poorly water-soluble compound is 2,5,8,11-tetramethyl-6-dodecyne-5,8-diol. The solubilizer is selected from polyoxyethylene anionic surfactants and non-ionic surfactants.

Abstract: One embodiment of the invention is an emulsion type inkjet ink including water, a pigment, an emulsifier, and an alcohol compound in which the alcohol compound is dispersed in water with the emulsifier. The emulsifier is a polyoxyethylene sorbitan fatty acid ester compound, and the alcohol compound is a compound including an aromatic ring and having a boiling point of 180° C. or higher.

Abstract: According to one embodiment, an aqueous inkjet ink includes a color material, water in an amount of from 50-70% by mass of the total amount of the ink, and a water-soluble organic solvent in an amount of from 29-49% by mass of the total amount. The water-soluble organic solvent contains a compound represented by the following general formula 1, and the compound represented by the following general formula 1 accounts for 10-35% by mass of the total amount of the ink. The sum of the amounts of the color material, the water, and the water-soluble organic solvent is 100% by mass or less of the ink. Where, R1 and R2 each independently represent an alkyl group having 1 to 4 carbon atoms, and m and n each represent an integer satisfying the relation: 2?m+n?6.

Abstract: According to one embodiment, an aqueous inkjet ink includes a color material, water in an amount of 50-70% by mass of the total amount of the ink, and a water-soluble organic solvent in an amount of 29-49% by mass of the total amount. The soluble organic solvent contains a compound represented by the following general formula 1 which accounts for 10-36% by mass of the total amount of ink. When the amount of the compound is equal to the amount of the solvent, the total amount of the solvent is the compound. The sum of the amounts of the color material, the water, and the water-soluble organic solvent is 100% by mass or less of the ink. Where, X1, X2, and X3 each independently represent EOn, and X4 represents an CH3CH2— or an (EOn)O—. EOn is represented by the following general formula 2, where n representing an integer of 1-5.

Abstract: An embodiment of the invention is concerned with an aqueous inkjet ink containing an ink solvent containing water and a water-soluble organic solvent containing glycerin and triethylene glycol and a pigment dispersed in the ink solvent. The water-soluble organic solvent accounts for from 30 to 80% by weight of the ink solvent, a weight of the triethylene glycol is from 0.5 to 1.5 times the weight of the glycerin, and the pigment is blended in an amount of from 2 to 20% by weight of the total weight of the ink.

Abstract: According to one embodiment, an aqueous inkjet ink includes a color material in an amount of 2 to 20% by mass of the total amount of ink, water in an amount of 41 to 70% by mass of the total amount, and a water-soluble organic solvent in an amount of 20 to 53% by mass of the total amount. The solvent contains a compound represented by the following general formula 1 which accounts for 20 to 50% by mass of the total amount of ink. When the amount of compound is equal to the amount of solvent, the total amount of solvent is the compound, and the sum of the amounts of the color material, the water, and the solvent is 100% by mass or less of the ink. Where, each of a, b, and c represents an integer of 1 or more, and satisfies 3?a+b+c?15.

Abstract: According to one embodiment, an aqueous inkjet ink includes a pigment in an amount of 2 to 20% by mass of the total amount of the aqueous inkjet ink, and a dispersion medium in which the pigment is dispersed. The dispersion medium contains water in the amount of 53 to 94% by mass, with the remainder of the dispersion medium being a compound represented by the following general formula 1. The water accounts for 50 to 80% by mass of the total amount of the aqueous inkjet ink. In the general formula 1, a, b, and c may be the same or different, each representing an integer of 1 or more, and satisfy the following inequation: 4?a+b+c?10.

Abstract: According to one embodiment, an aqueous inkjet ink includes a color material, water as a first liquid, propylene glycol as a second liquid, and a compound represented by the following general formula (PEG) or a compound represented by the following general formula (PGC) as a third liquid. The aqueous inkjet ink has a water activity of 0.85 or less. Ra—O—(CH2CH2O)n—H ??(PEG) In the formula, Ra represents H or CH3, and n represents 3 to 14. In the formula, Rb represents a group selected from CH2CH2O and CH2CHCH3O, and j, k, p, and q may be the same or different, and represent an integer of 1 or more, and satisfy the formula: 4?j+k+p+q?8.

Abstract: According to one embodiment, an aqueous inkjet ink includes water in an amount of from 15 to 50% by mass of the total amount of the ink, a glycol mixture in an amount of from 34 to 80% by mass of the total amount of the ink, and a pigment in an amount of from 2 to 20% by mass of the total amount of the ink. The glycol mixture contains 40 to 70% by mass of propylene glycol, with the remainder being isoprene glycol.

Abstract: According to one embodiment, an aqueous inkjet ink includes a dispersion medium that contains water and a water-soluble polyhydric alcohol having a weight average molecular weight of 400 or more, and a pigment. The pigment accounts for less than 5 mass % of the total amount of the aqueous inkjet ink. The aqueous inkjet ink has viscosities (mPa·s) measured using a cone-plate type viscometer at 20 rpm and satisfying the following relationships: VA/VB?1.5 VA?10 mPa·s 3 mPa·s?VB?15 mPa·s, where VA is the viscosity at 30° C., and VB the viscosity at 45° C.

Abstract: According to one embodiment, an aqueous inkjet ink includes water and a pigment. The pigment is contained in the aqueous inkjet ink in an amount of less than 5 wt %. The queous inkjet ink has viscosities (mPa·s) measured at 25° C. using a cone-plate type viscometer and satisfying the following relationships: VB/VA?1.5 3 mPa·s?VA?15 mPa·s wherein VA represents a viscosity measured at a rotation speed of 50 rpm and VB represents a viscosity measured at a rotation speed of 2.5 rpm.

Abstract: According to one embodiment, an aqueous pigment ink includes water, a pigment, and a water-soluble polymeric compound. The pigment is contained in the aqueous pigment ink in an amount of less than 5 wt %. The aqueous pigment ink has viscosities (mPa·s) measured at 25° C. using a cone-plate type viscometer and satisfying the following relationships: 0?(VB?VA)/VB<0.05 VC/VA?1.5 3 mPa·s?VA?15 mPa·s wherein VA represents a viscosity measured at a rotation speed of 50 rpm, VB represents a viscosity measured at a rotation speed of 2.5 rpm, and VC represents a viscosity measured at a rotation speed of 50 rpm after adding calcium chloride in an amount of 0.5 wt % of the aqueous pigment ink.