Nikon Corporation

Essilor International

Nikon Vision Co., Ltd.

Akiko Miyakawa

Toru Nakamura

Miho Matsumoto

Toshihiko Kurata

Hirofumi Ishiyama

Akira Ishikawa

Kenzaburo Suzuki

Masahito Suzuki

Masafumi Mizuguchi

Miwako Yoshida

Masayuki Shijo

Taeko Toshi

Christophe Provin

Ludovic Ferrigno

Toshio Ikugata

A photocurable composition which can be used to manufacture a three-dimensional object that is formed by stacking a plurality of layers on top of each other, from which the three-dimensional object having excellent transparency, a high glass transition temperature, and a high hardness can be formed, and which exhibits a high curing rate. The photocurable composition is a photocurable composition used to manufacture a three-dimensional object that is formed by stacking a plurality of layers on top of each other. The photocurable composition contains a monofunctional monomer having a polycyclic aliphatic group, a polyfunctional monomer, an alcohol, and an acylphosphine oxide photopolymerization initiator.

Photocurable composition and method of manufacturing three-dimensional object

A photocurable composition for three-dimensional stereolithography which has a lower viscosity and from which a cured product having a high refractive index is obtained, and a three-dimensional object formed by using the composition. The composition is a photocurable composition for three-dimensional stereolithography containing a fluorene monomer, a carbazole monomer, a diluent monomer, and a photopolymerization initiator, the carbazole monomer being contained in an amount of less than 30 wt % with respect to the total amount of the fluorene monomer and the carbazole monomer, and the diluent monomer being contained in an amount of at least 20 wt % with respect to total solids.

Photocurable composition for three-dimensional stereolithography and three-dimensional object

Disclosed is a liquid polymerizable composition including a chain-growth polymerization dispersing monomer, a step-growth polymerization monomer system and inorganic nanoparticles homogeneously dispersed in the monomers, as well as its use for the preparation of a transparent polymeric material having a high refractive index and low haze and its use in the optical field.

Liquid polymerizable composition comprising chain-growth and step-growth polymerization monomers and inorganic nanoparticles dispersed therein, and its use to manufacture an optical article

An objective lens OL comprises: a first lens group Gdisposed on an object side, having positive refractive power as a whole and having a positive lens (plano-convex lens L) which is disposed closest to the object and of which lens surface closest to the object is a plane or a surface having a low curvature, and at least one cemented lens (cemented lens CLor the like); a second lens group Gdisposed on an image side, having negative refractive power as a whole, and having a concave surface facing the image and a concave surface facing the object, which face each other; and a diffractive optical element GD in which two diffractive element constituents made from different optical materials are cemented, which has a diffractive optical surface D formed with diffraction grating grooves on the cemented surface, and which is disposed closer to the object than a position where a principal ray crosses the optical axis.

Objective lens

Disclosed is a resin precursor composition including a bifunctional (meth)acrylate containing a fluorine atom, a bifunctional (meth)acrylate having a fluorene structure, and a photopolymerization initiator, the resin precursor composition in which the formation of precipitates during its storage is suppressed; and a resin obtained from the same. Specifically disclosed is a resin precursor composition that contains a bifunctional fluorine-containing (meth)acrylate (component A); a (meth)acrylate having a fluorene structure (component B); and a photopolymerization initiator (component C), wherein the component B includes a bifunctional (meth)acrylate having a fluorene structure (b-1) and a monofunctional (meth)acrylate having a fluorene structure (b-2) at a molar ratio (b-1):(b-2) of 90:10 to 70:30.

Resin precursor composition and resin obtained by photocuring the same

An achromatic lens system is provided with a cemented resin lens having positive refractive power constructed by a resin lens Lhaving positive refractive power cemented with a resin lens Lhaving negative refractive power, and a close-contact multi-layer type diffractive optical element LE, the diffractive optical element LE being disposed to an image side of the cemented resin lens, the diffractive optical element LE being constructed by cementing two diffractive element members DE, DEeach made of different optical materials with each other, and the cemented surface thereof being a diffractive optical surface Gf on which grooves of a diffraction grating are formed, there by being lightweight and easily manufactured, capable of excellently correcting chromatic aberration and spherical aberration at the same time.

Achromatic lens system and optical apparatus

To obtain a close-contact multi-layer type diffractive optical element having a homogeneous high-refractive-index and low-dispersion resin layer, an acrylate-terminated oligomer, obtained by allowing excess bifunctional acrylate to react with bifunctional thiol, is used as a resin precursor for the high-refractive-index and low-dispersion resin layer.

Close-bonded diffractive optical element, optical material used therefor, resin precursor, and resin precursor composition

The present invention provides a resin-cemented optical element comprising a base memberand a resin layerformed on the surface of the base member; the resin layerbeing in a thickness of 300 &#x3bc;m or smaller at least at some part of a peripheral portion (i.e., a region within 1 mm from the peripheral edge faceof the resin layer, or a region outside an effective-diameter region), and being in a thicknessof 850 &#x3bc;m or larger at a position which is thickest in the resin layer; a mold therefore; a manufacturing method thereof; and an optical article having this optical element.

Resin-cemented optical element, mold therefor, fabrication process thereof, and optical article

The optical element of the present invention has a first member and a second member which have been joined in close contact, and has n&#x3e;nand (n&#x2212;n)&#x3c;(n&#x2212;n), where the first member is formed of a resin having both a benzene ring and a fluorine atom, or the second member is formed of a resin having an alicyclic structure. It also makes use of an optic-purpose resin precursor composition prepared by mixing a first resin precursor having n&#x3c;1.50 and (n&#x2212;n)&#x3e;0.003 in an uncured state and a second resin precursor having n&#x3c;1.62 and (n&#x2212;n)&#x3e;0.010.

Optic-purpose precursor composition, optic-purpose resin, optical element, and optical article

An object of the present invention is to provide a resin composite-type optical element capable of cutting off ultraviolet light even though it uses a photocurable resin. A resin composite-type optical element of the embodiment of the present invention is a resin composite-type optical element having a base material and a resin layer, and the resin layer has at least a first resin layer which is a molded product of a photocurable resin and which has an internal transmittance of not less than 85% for light of the wavelength of 400 nm in the thickness of 100 &#x3bc;m and an internal transmittance of not more than 3% for light of the wavelength of 360 nm in the thickness of 100 &#x3bc;m.

Resin composite-type optical element and process for producing the resin composite-type optical element

A diffractive optical elementis constituted by sandwiching and closely bonding first and second optical element componentswhich have different refractive indices and are adhered via a relief pattern, between third and fourth optical element components

Diffractive optical element

A pattern transfer method includes first through third steps. In the first step, a desired pattern is transferred onto a resin layer formed on a substrate, a release layer being disposed between the substrate and the resin layer. In the second step, which is executed after the first step, the pattern having been transferred onto the resin layer is transferred to the substrate and the release layer is partially exposed. In the third step, which is executed after the second step, the release layer present between the substrate and the resin layer is dissolved and is thus removed from the substrate.

Pattern transfer method

The optical element of the present invention has a first member and a second member which have been joined in close contact, and has n&#x3e;nand (n&#x2212;n)&#x3c;(n&#x2212;n), where the first member is formed of a resin having both a benzene ring and a fluorine atom, or the second member is formed of a resin having an alicyclic structure It also makes use of an optic-purpose resin precursor composition prepared by mixing a first resin precursor having n&#x3c;1.50 and (n&#x2212;n)&#x3e;0.003 in an uncured state and a second resin precursor having n&#x3c;1.62 and (n&#x2212;n)&#x3e;0.010.

Growing community of inventors

Sagamihara, Japan

Akiko Miyakawa