Asahi Glass Company, Limited

Tabata Co., Ltd.

Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Shin-etsu Chemical Co., Ltd.

Kyoto University

Shinshu University

Hiromasa Sato

Yuzuru Tanabe

Yoshiharu Ooi

Tomoki Gunjima

Hiroki Hotaka

Koji Miyasaka

Masahiro Murakawa

Takuji Nomura

Yukihiro Tao

Atsushi Koyanagi

Naomitsu Umemura

Takehiko Nishiyama

Ryuichiro Shimizu

Akira Yamamoto

Masaki Tanaka

Koichi Murata

Kazuyuki Hanada

Koji Sakuta

Hiroyuki Shimanaka

Yoshinobu Tsujii

Yuji Kuroda

Haruo Kawashima

Minoru Takeuchi

Shunji Fukasawa

Taro Fujima

Keita Sakakibara

Ryota Murakami

Hatsuhiko Hattori

Motoaki Umezu

Kara Yoshida

Yoichi Tagi

Nobuhiko Takeshita

Mitsuo Oosawa

Yoshiyuki Miyake

Mitsuru Kurosawa

Hirotaka Nashi

Shota Iino

Masao Miyamura

Toshihisa Tanaka

Mikihisa Kondo

Miho Tanishima

The present invention provides a surface treatment film that is capable of imparting durability such as wear resistance, friction resistance, chemical resistance, heat resistance, and solvent resistance to the surfaces of various substrates, and that exhibits excellent adhesion to the surfaces of the substrates. The surface treatment film is provided on the surface of a substrate. The surface treatment film has a laminated structure that includes a polymer layer (i) disposed on the surface side of the substrate and a polymer layer (ii) disposed on the polymer layer (i). The polymer layer (i) contains a first polymer derived from a polymerization initiation group-containing polymer, such as a polyester having, in a side chain, a functional group represented by formula (1) wherein Rrepresents a hydrogen atom, a methyl group, or the like, Rrepresents a methyl group or the like, X represents a chlorine atom or the like, Y represents O or NH, and * shows a bonding position. The polymer layer (ii) contains a second polymer which contains a constituent unit derived from a monomer such as an aromatic vinyl-based monomer and which extends using the functional group represented by formula (i) as a polymerization initiation point.

Surface treatment film, manufacturing method therefor, and article

Disclosed herein is a fiber formed from a resin including a silicone-modified polyurethane resin comprising the reaction products of a polyol (A), a chain extender (B), an active-hydrogen-group-containing organopolysiloxane (C), and a polyisocyanate (D), wherein the active-hydrogen-group-containing organopolysiloxane (C) contains an active-hydrogen-group-containing organopolysiloxane (C-1) having a carbinol group at only one terminal.

Silicone-modified polyurethane fiber and method for manufacturing same

There is provided a diffraction grating including a convex portion and a concave portion which are used for lights having different wavelengths &#x3bb;, &#x3bb;and &#x3bb;and are alternately disposed on at least one surface of a substrate with a predetermined pitch. An average refractive index of the convex portion is smaller than an average refractive index of the concave portion. A phase difference in the lights having the wavelength &#x3bb;which transmit the convex portion and the concave portion and a phase difference in the lights having the wavelength &#x3bb;which transmit the convex portion and the concave portion are both substantially the integral multiple of 2&#x3c0;, and a phase difference in the lights having the wavelength &#x3bb;which transmit the convex portion and the concave portion is substantially the non-integral multiple of 2&#x3c0;.

Diffraction grating, aberration correction element and optical head device

An optical rotating plate has an optical rotating material layer. A phase plate is provided on a first surface side of the optical rotating plate and has at least one birefringent material layer. The first surface side is disposed toward an emitting side of an optical path, thereby giving different phase differences to a first linearly polarized light group containing at least a linearly polarized light having a first wavelength and a second linearly polarized light group containing at least a linearly polarized light having a second wavelength which is different from the first wavelength.

Wavelength selecting wavelength plate and optical head device using it

In order to provide a wavelength-selective light-shielding element capable of blocking circularly-polarized light beams rotating in a specific direction among light beams whose wavelengths falling in a specific range, a light-shielding region is provided in a portion of a transparent substrate, wherein the light-shielding region permits passage of first circularly-polarized light rotating in a first direction regardless of a wavelength of the first circularly-polarized light and blocks second circularly-polarized light beams whose wavelengths falling within a predetermined range, among second circularly-polarized light beams rotating in the second direction, to thus permit passage of the second circularly-polarized light beams falling outside the predetermined range.

Wavelength-selective light-shielding element and optical head using the same

A cosmetic composition comprising a polysiloxane copolymer comprising a repeating unit (A) having at least one anionic group, a repeating unit (B) having at least one linear or branched alkyl group having 8 to 64 carbon atoms, and a polysiloxane repeating unit (D), said repeating units (A), (B), and (D) being bonded with one another via diisocyanate residue represented by the following formula (1) wherein X is a divalent hydrocarbon group selected from the group consisting of aromatic hydrocarbon groups, aliphatic hydrocarbon groups, and alicyclic hydrocarbon groups. Cosmetics comprising the composition maintains their effects for a prolonged period of time.

Cosmetic composition

The present invention provides a wavelength-selective diffraction element, configured such that light having a plurality of wavelengths are incident thereon as incident light, which is provided with: a transparent substrate; a concavo-convex part, formed on the transparent substrate such that concave portions and convex portions are cyclically extended in one direction, and comprised of a first material which is optically isotropic; and a filling part, filling at least the concave portions and comprised of a second material which is optically isotropic. The first material and the second material have no absorbance with respect to the wavelengths of the incident light. The first material and the second material have an identical refractive index with respect to light having a first wavelength which is at least one of the wavelengths of the incident light. The first material and the second material have different refractive indices with respect to light having a second wavelength which is at least one of the wavelengths of the incident light and different from the first wavelength.

Wavelength-selective diffraction element and optical head device incorporating the same

A polarizing diffraction element having a wavelength selectivity which functions as a polarizing diffraction element at a wavelength &#x3bb;, and which does not function as a diffraction grating not depending on incident polarization state and shows high transmittance at a wavelength &#x3bb;, and an optical head device employing the element, are provided. The polarizing diffraction element selectively diffracts or transmits incident light having two different wavelengths each containing a first circularly polarized light and a second circularly polarized light having a rotation opposite from the rotation of the first circularly polarized light, depending on wavelength and polarization state of the incident light. Then, a reflective wavelength region for at least the first circularly incident light, does not contain said two incident wavelengths.

Polarizing diffraction element and optical head device

The present application relates to a liquid crystal lens element and an optical head device, in particular order, to a liquid crystal lens capable of switching the focal length among a plurality of different focal lengths according to switching of applied voltage among a plurality of applied voltages, and an optical head device employing the liquid crystal lens, for writing and/or reading an information to/from an optical recording medium.

Liquid crystal lens element and optical head device

A phase correction element comprising a first phase correction layer formed in a region of numerical aperture NA, and a first phase plate; the first phase correction layer comprising a concavo-convex portion having a rotational symmetry with respect to the optical axis of incident light and having a cross-sectional shape of a saw-tooth-form or a saw-tooth-form whose convex portions are each approximated by a step form; the first phase plate generating a birefringent phase difference of about an odd number times of &#x3c0;/2 for linearly polarized light of &#x3bb;; and the phase correction element that does change a transmitted wavefront of &#x3bb;and changing a transmitted wavefront of the &#x3bb;or transmitted wavefront of both wavelengths of &#x3bb;and &#x3bb;when three types of incident light at &#x3bb;=410 nm, &#x3bb;=650 nm and &#x3bb;=780 nm respectively, are incident.

Phase correction element and optical head device

A polarized diffractive filter contains cyclic concave/convex portions formed as a diffractive grating on a transparent substrate. The concave portions are filled with an optical material. At least one member selected from the group consisting of i) a material constituting the concave/convex portions, and ii) the optical material filled in the concave portions contains a liquid crystal material. The diffractive grating contains an isotropic material, the isotropic material having a refractive index outside a range from an extraordinary index to an ordinary index of the liquid crystal material. The polarized diffractive filter is capable of receiving light having at least two different peak wavelengths so as to shield light of at least one of the peak wavelengths by diffraction and to transmit the light of the other peak wavelengths.

Polarized diffractive filter and layered polarized diffractive filter

A phase plate having a reduced size and a reduced weight and having accurately parted regions while it has the same function as a conventional two-parted optical rotation plate and an optical data recording/reproducing device capable of stably recording and reproducing are presented. A phase plate Pcomprising a polymer liquid crystal filmheld between transparent substrates i,, wherein the polymer liquid crystal filmis parted spatially in the region into which an incident light enters, so that the light transmitting the phase plate assumes a different state of polarization depending on an aligning direction of the molecules of the polymer liquid crystal film. The phase plate is located as a two-parted optical rotation plate in an optical data recording/reproducing device.

Phase plate and an optical data recording/reproducing device

To provide optical elements such as a phase plate suitably used in a broadband range and a polarizing diffraction element excellent in diffraction efficiency, a polymerizable liquid crystal composition to be used for them, and an optical head device using them. A polymerizable liquid crystal composition containing a polymerizable compound having a mesogen structure comprising the following condensed benzene ring group (A) and the following 6-membered cyclic group (B) bonded to at least one bond in the group (A) directly or via a connecting group &#x2014;OCO&#x2014; or &#x2014;COO&#x2014;, and a monovalent terminal group bonded to each of both terminals of the mesogen structure, at least one of the terminal groups being a monovalent organic group having a polymerizable moiety:

Polymerizable liquid crystal composition, optical anisotropic material, optical element and optical head device

A diffraction element having concave/convex-like diffraction gratings in its two surfaces from which at least two separated light beams can be taken in the same direction without changing largely the propagating direction of diffracted light even if the temperature of the operating environment changes. A diffraction grating having a concave/convex shape in cross-section is formed in the incoming-side surface of the transparent substrate and two diffraction gratings of concave/convex shape in cross-section are formed in the outgoing-side surface wherein the grating pitch of the first one is made equal to the grating pitch of one of the second ones. In addition, a reflection type diffraction element exhibiting a good wavelength dependence of diffraction efficiency without being dependent largely on the direction of polarization of an incoming light is provided. A pseudo sawtooth-like diffraction grating is formed in either surface of the transparent substrate, a reflective film is formed on a diffraction grating portion, and an antireflective film is formed on the opposite surface.

Diffraction element

Growing community of inventors

Koriyama, Japan

Hiromasa Sato