Abstract: A diffractive optical element includes: a body being composed of a first optical material and having a diffraction grating on the surface thereof; and an optical adjustment layer being composed of a second optical material and provided on the body so as to cover the diffraction grating. An envelope passing through the edge of the diffraction grating presents a curved surface, and the optical adjustment layer has a uniform thickness along the normal direction from the envelope.

Abstract: According to a method for producing a diffraction optical element, the center of a molding face and the center of a substrate are positionally aligned to each other based on a marker of a prescribed shape which is formed at the center of the molding face of a mold and the shape of a diffraction grating of the substrate. A nanocomposite material is located between the molding face and the diffraction grating, and the material is pressed by the mold and the substrate to form an optical adjusting layer on the diffraction grating.

Abstract: A diffractive optical element disclosed in the present application includes a body 102 formed of a first optical material containing a first resin, the body 102 having a surface 102a including a first area 105 at which a diffraction grating 104 is provided and a second area 106 located outer to the first area; an optical adjustment layer 103 formed of a second optical material containing a second resin, the optical adjustment layer 103 being provided on the body while covering the first area and at least a part of the second area 106 of the surface of the body; and an adhesive interface section 109 containing an adhesive material which is adhesive to the second optical material, the adhesive interface section 109 being, at the second area 106 of the surface of the body, at least partially located below the optical adjustment layer 103 and being located at least in a region from the surface to the inside of the body.

Abstract: In a diffraction optical element having a structure in which a base and an optical adjustment layer adhere to each other, defects such as cracks and peeling occur in the optical adjustment layer, when the adhesive strength between the base and the optical adjustment layer is degraded. In a diffraction optical element 100 of the present invention, a plurality of anchor grooves 3 are formed in a planar second region 6 of a base 1. Further, a depth of an anchor groove of the plurality of anchor grooves 3, which is positioned on an outermost side, is designed so as to be smaller than a depth of another anchor groove of the plurality of anchor grooves 3, which is positioned on an innermost side. An optical adjustment layer 9 adheres so as to cover a first region 5 in which a diffraction grating 2 is formed and the second region 6 in which the anchor grooves 3 are formed of the base 1.

Abstract: A soft capsule in which a shell is filled with fill material, and the fill material is in a solid or semi-solid form at room temperature. The soft capsule may be a chewable capsule, and the fill material may comprise a low melting point additive. The content of the low melting point additive may be 10% or more with respect to the total weight of the fill material, and may have a melting point of about 20 to 50° C. The low melting point additive may be selected from the group consisting of chocolate base, lard, coconut oil and macrogol (polyethylene glycol) as well as a combination thereof.

Abstract: A diffraction grating lens according to the present invention includes a lens body 171, and a diffraction grating which has been formed on the surface of the lens body 171 and which includes diffraction steps and concentric annular zones. Each annular zone is interposed between two adjacent ones of the diffraction steps. The lens body 171 is made of a first material that has a refractive index n1 (?) at an operating wavelength ?. The diffraction grating is in contact with the air. At least one of the annular zones has one of a recess 11 and a protrusion 12 provided for at least a part of the inner end portion thereof and the other provided for at least a part of the outer end portion thereof, respectively. The diffraction grating lens satisfies the relation 0.9 ? d ? m · ? n 1 ? ( ? ) - 1 ? 1.1 ? d where d represents a designed step length of the diffraction step 14 and m represents an order of diffraction.

Abstract: A diffraction grating lens according to the present invention is a diffraction grating lens 11 including: a lens body 12; and a plurality of diffraction steps relative to a base shape and a plurality of diffraction gratings 13 interposed between the diffraction steps, provided on a surface of the lens body 12. The lens body 12 is made of a first material having a refractive index n1(?) at a used wavelength ?; the diffraction grating 13 is in contact with air; and the relationship of an inequality below is satisfied, where d is a design step length of the diffraction steps, and m is an order of diffraction.

Abstract: A second region (12) composed of a plane is formed around a first region (11) having a lens function, and a third region (13) is formed between the first region and the second region. A protection film (24) is formed on the surface of the first region 1. The first region is protruded relative to the second region, the third region is formed throughout the rim of the first region 1, and the surface of the third region is recessed relative to a virtual curved surface (11a) that is a curved surface along the surface shape of the first region being extended to the second region. Consequently, it is possible to form throughout the first region a protection film having a surface shape that substantially matches the surface shape of the first region.

Abstract: A diffractive optical element (10) includes a substrate (11), a protective film (13a, 13b), and a diffraction grating (12a, 12b) disposed between the substrate (11) and the protective film (13a, 13b), wherein the diffraction grating (12a, 12b) is formed of a composite material containing a resin and inorganic particles, a volume ratio of the inorganic particles with respect to the composite material is equal to or smaller than 50% by volume, and the diffraction grating (12a, 12b) has a thickness of equal to or smaller than 20 ?m. Since the diffractive optical element (10) uses the composite material containing the resin and the inorganic particles as a material for the diffraction grating (12a, 12b), which is relatively difficult to process, the moldability improves compared with the conventional case of using glass, etc.

Abstract: If an optical lens base having a diffraction grating on the surface is made of a resin, a corrosion reaction is produced between the optical lens base and a nanocomposite film material, thus deteriorating performance as a diffractive optical element. In the manufacturing process of a diffractive optical element according to the present invention, the nanocomposite film material is dripped onto a die and then heated and dried, thereby vaporizing away a solvent from the nanocomposite film material. After that, the dies are assembled to form a nanocomposite film with a predetermined thickness on the optical lens base. As a result, a diffractive optical element with excellent optical properties can be obtained without producing a reaction between the optical lens base and the nanocomposite film material.

Abstract: A diffractive optical element according to the present invention includes: a body 1 being composed of a first optical material containing a first resin, and having a diffraction grating 2 on a surface thereof; and an optical adjustment layer 3 being composed of a second optical material containing a second resin, and provided on the body so as to cover the diffraction grating. A difference between a solubility parameter of the first resin and a solubility parameter of the second resin is 0.8 [cal/cm3]1/2 or more, and the first resin and the second resin each have a benzene ring.

Abstract: According to a method for producing a diffraction optical element of the present invention, the center of a molding face 2 and the center of a substrate 4 are positionally aligned to each other based on a marker 3 of a prescribed shape which is formed at the center of the molding face 2 of a mold 1 and the shape of a diffraction grating 5 of the substrate 4. A nanocomposite material 9 is located between the molding face 2 and the diffraction grating 5, and the material 9 is pressed by the mold 1 and the substrate 4 to form an optical adjusting layer 10 on the diffraction grating 5.

Abstract: A composite material (10) includes a resin (12), and first inorganic particles (11) dispersed in the resin and containing at least zirconium oxide. The composite material has a refractive index at the d line nCOMd of not less than 1.60 and an Abbe's number ?COM of not less than 20, and satisfies a relationship nCOMd?1.8?0.005 ?COM. This composite material exhibits both a high refractive index and low dispersion in good balance, and has excellent workability. Accordingly, using this composite material makes it possible to realize a small optical component having favorable wavelength characteristics.

Abstract: A diffractive optical element according to the present invention includes: a body 1 being composed of a first optical material containing a first resin, and having a diffraction grating 2 on a surface thereof; and an optical adjustment layer 3 being composed of a second optical material containing a second resin, and provided on the body 1 so as to cover the diffraction grating 2. The first optical material has a refractive index which is smaller than a refractive index of the second optical material; the refractive index of the first optical material has a wavelength dispersion which is greater than a wavelength dispersion of the refractive index of the second optical material; and a difference in solubility parameter between the first resin and the second resin is no less than 0.8 [cal/cm3]1/2 and no more than 2.5 [cal/cm3]1/2.

Abstract: A soft capsule in which a shell is filled with fill material, and the fill material is in a solid or semi-solid form at room temperature. The soft capsule may be a chewable capsule, and the fill material may comprise a low melting point additive. The content of the low melting point additive may be 10% or more with respect to the total weight of the fill material, and may have a melting point of about 20 to 50° C. The low melting point additive may be selected from the group consisting of chocolate base, lard, coconut oil and macrogol (polyethylene glycol) as well as a combination thereof.

Abstract: A soft capsule in which a shell is filled with fill material, and the fill material is in a solid or semi-solid form at room temperature. The soft capsule may be a chewable capsule, and the fill material may comprise a low melting point additive. The content of the low melting point additive may be 10% or more with respect to the total weight of the fill material, and may have a melting point of about 20 to 50° C. The low melting point additive may be selected from the group consisting of chocolate base, lard, coconut oil and macrogol (polyethylene glycol) as well as a combination thereof.

Abstract: A second region (12) composed of a plane is formed around a first region (11) having a lens function, and a third region (13) is formed between the first region and the second region. A protection film (24) is formed on the surface of the first region 1. The first region is protruded relative to the second region, the third region is formed throughout the rim of the first region 1, and the surface of the third region is recessed relative to a virtual curved surface (11a) that is a curved surface along the surface shape of the first region being extended to the second region. Consequently, it is possible to form throughout the first region a protection film having a surface shape that substantially matches the surface shape of the first region.

Abstract: A lens according to the present invention includes at least one first area (11) including a lens portion (11a) with a convex shape, and a second area (12) surrounding the first area (11). A groove (13) surrounding the first area (11) is formed between the first area (11) and the second area (12). A coating layer (14) is formed on the lens portion (11a).

Abstract: A diffractive optical element that can maintain transparency and be molded easily, and a method for manufacturing the same are provided. A diffractive optical element (10) includes a substrate (11), a protective film (13a, 13b), and a diffraction grating (12a, 12b) disposed between the substrate (11) and the protective film (13a, 13b), wherein the diffraction grating (12a, 12b) is formed of a composite material containing a resin and inorganic particles, a volume ratio of the inorganic particles with respect to the composite material is equal to or smaller than 50% by volume, and the diffraction grating (12a, 12b) has a thickness of equal to or smaller than 20 ?m. Since the diffractive optical element (10) uses the composite material containing the resin and the inorganic particles as a material for the diffraction grating (12a, 12b), which is relatively difficult to process, the moldability improves compared with the conventional case of using glass, etc.

Abstract: A composite material (10) includes a resin (12), and first inorganic particles (11) dispersed in the resin and containing at least zirconium oxide. The composite material has a refractive index at the d line nCOMd of not less than 1.60 and an Abbe's number ?COM of not less than 20, and satisfies a relationship nCOMd?1.8?0.005 ?COM. This composite material exhibits both a high refractive index and low dispersion in good balance, and has excellent workability. Accordingly, using this composite material makes it possible to realize a small optical component having favorable wavelength characteristics.