Abstract: In an auxiliary light source unit, when the longest length of a light emitting face of an LED light source is S (mm), the furthest distance from the light emitting face of the LED light source to the light exiting surface of an optical element is T (mm), the largest diameter of the light transmitting section is L1 (mm), and the largest diameter in first partial ring zones and second partial ring zones is L2 (mm), the following conditional expressions are satisfied, 1.5<L2/S<4.0??(1) S/3<T<25??(2) 0.1<L1·T/S<1.05??(3) provided that T=T1+T2, where T1 is a thickness (mm) from the light emitting face of the LED light source to the light entering surface of the optical element, and T2 is a thickness (mm), in the optical axis direction, of the optical element.

Abstract: A two-part foam hair dye which comprises a first part comprising an alkali agent, a second part comprising hydrogen peroxide, and a non-aerosol foamer container, wherein the first part comprises the components (A) to (D), an equivalent ratio of a anion site of the component (A) to a cation site of the component (B) (anion/cation) is more than 1, a mass ratio of a content of the component (C) to content of the component (D) ((C)/(D)) is 5 or less, and the liquid mixture has a viscosity (25° C.) of 1 to 300 mPa·s: (A) a carboxylic acid anion surfactant, (B) a polymer or copolymer having a mole fraction of diallyldimethyl quaternary ammonium salt monomer of 70% or more, (C) 0.5 to 1.5% by mass of an oxidation dye having a meta-dihydroxybenzene structure, and (D) 0.1 to 9% by mass of polypropyleneglycol of Mw 200 to 1200.

Abstract: A two-part hair dye including a first part containing an alkali agent, a second part containing hydrogen peroxide, and a non-aerosol foamer container; wherein a liquid mixture contains Components (A) and (B) specified below, wherein the content of hydrogen peroxide in the liquid mixture is 3.60 mass % or higher, and the viscosity of the liquid mixture is 1 to 300 mPa·s. A method for dying hair, wherein a foam of the liquid mixture of the first part and the second part of the two-part hair dye is applied to hair, left to stand for 3 to 60 minutes, and then washed out. Component (A): oxidation dye; Component (B): 0.50 to 3.0 mass %, of polypropylene glycol having a weight-average molecular weight of 200 to 800.

Abstract: A two-part foam hair dye which comprises a first part comprising an alkali agent, a second part comprising hydrogen peroxide, and a non-aerosol foamer container, wherein the first part comprises the components (A) to (D), an equivalent ratio of a anion site of the component (A) to a cation site of the component (B) (anion/cation) is more than 1, a mass ratio of a content of the component (C) to the content of the component (D) ((C)/(D)) is 5 or less, and the liquid mixture has a viscosity (25° C.) of 1 to 300 mPa·s: (A) a carboxylic acid anionic surfactant, (B) a polymer or copolymer having a mole fraction of diallyldimethyl quaternary ammonium salt monomer of 70% or more, (C) 0.5 to 1.5% by mass of an oxidation dye having a meta-dihydroxybenzene structure, and (D) 0.1 to 9% by mass of polypropyleneglycol of Mw 200 to 1200.

Abstract: Provided are a small image pickup lens which ensures a wide angle of view, permits various aberrations to be excellently corrected and is applicable to an image pickup element having a high pixel density, an image pickup apparatus using the image pickup lens, and a mobile terminal using the image pickup apparatus. The image pickup lens employs a structure which includes, in order from the object side, an aperture stop, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with negative refractive power, and the image pickup lens is designed to satisfy predetermined conditional expressions.

Abstract: A two-part hair dye including a first part containing an alkali agent, a second part containing hydrogen peroxide, and a non-aerosol foamer container; wherein a liquid mixture contains Components (A) and (B) specified below, wherein the content of hydrogen peroxide in the liquid mixture is 3.60 mass % or higher, and the viscosity of the liquid mixture is 1 to 300 mPa·s. A method for dying hair, wherein a foam of the liquid mixture of the first part and the second part of the two-part hair dye is applied to hair, left to stand for 3 to 60 minutes, and then washed out. Component (A): oxidation dye; Component (B): 0.50 to 3.0 mass %, of polypropylene glycol having a weight-average molecular weight of 200 to 800.

Abstract: Provided are a small image pickup lens which ensures a wide angle of view, permits various aberrations to be excellently corrected and is applicable to an image pickup element having a high pixel density, an image pickup apparatus using the image pickup lens, and a mobile terminal using the image pickup apparatus. The image pickup lens employs a structure which includes, in order from the object side, an aperture stop, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with negative refractive power, and the image pickup lens is designed to satisfy predetermined conditional expressions.

Abstract: The present invention provides a light guide element, a light guide unit, a backlight apparatus and a light source apparatus. The light guide element is provided for guiding a light flux from a light source into a light guide plate, and the light guide element includes: an incident surface; an emitting surface; a top surface and a base surface, in which one of the top surface and the base surface inclines to the other. The light guide element further includes a structure in a light leakage reducing shape arranged on at least one of the top surface and the base surface, which reduces an amount of light to be emitted from the surfaces of the light guide element excluding the emitting surface.

Abstract: The present invention provides an optical element and an illuminating device. The optical element includes: an incident surface; and an emitting section formed on an opposite side to the incident surface. The emitting section includes a plurality of protrusions. When each of the plurality of protrusions is projected onto a reference plane perpendicular to the incident surface to form a reference contour, the reference contour is substantially a trapezoid. A height of the reference contour and a height of a triangle formed by extending two legs of the reference contour satisfy a predefined condition.

Abstract: The present invention provides a light guide element, a light guide unit, a backlight apparatus and a light source apparatus. The light guide element is provided for guiding a light flux from a light source into a light guide plate, and the light guide element includes: an incident surface; an emitting surface; a top surface and a base surface, in which one of the top surface and the base surface inclines to the other. The light guide element further includes a structure in a light leakage reducing shape arranged on at least one of the top surface and the base surface, which reduces an amount of light to be emitted from the surfaces of the light guide element excluding the emitting surface.

Abstract: The present invention provides an optical element and an illuminating device. The optical element includes: an incident surface; and an emitting section formed on an opposite side to the incident surface. The emitting section includes a plurality of protrusions. When each of the plurality of protrusions is projected onto a reference plane perpendicular to the incident surface to form a reference contour, the reference contour is substantially a trapezoid. A height of the reference contour and a height of a triangle formed by extending two legs of the reference contour satisfy a predefined condition.