Canon Kabushiki Kaisha

Nihon Yamamura Glass Co., Ltd.

Hitachi Plant Technologies, Ltd.

Yamamura Glass Co., Ltd.

Zuyi Zhang

Kenji Takashima

Akira Sugiyama

Naoyuki Koketsu

Akiko Takei

Masayuki Yamada

Teigo Sakakibara

Hiroyuki Tanaka

Yoshinori Kotani

Jumpei Hayashi

Hajimu Wakabayashi

Yoshinori Tanigami

Tatsuo Furuta

Satoshi Wada

Toshihiro Ifuku

Motokazu Kobayashi

Hiroshi Funakubo

Kazumi Tanaka

Toshiya Yuasa

Nobuhiro Kumada

Shinji Eritate

Takashi Iijima

Masaki Azuma

Soichiro Okamura

Hajime Ikuta

Ryohei Terai

Keisuke Yamato

Norio Nishi

Iko Ito

Kunio Miyasaka

Yoshio Kanzaki

Hiroyuki Nishino

Hideo Yamada

Provided is a glass composition having an infrared absorbing function, water resistance, heat resistance, and a low expansion coefficient, the glass composition including the following components (a) to (c): (a) 0.1 wt % or more to 14.0 wt % or less of an intermediate oxide; (b) 0.1 wt % or more to 14.0 wt % or less of CuO; and (c) 80.0 wt % or more to 99.8 wt % or less of silica, in which a total of a content ratio of the intermediate oxide and a content ratio of the CuO is from 0.2 wt % or more to 20 wt % or less.

Glass composition and method of manufacturing the same, and glass member and image pickup device

An optical member including a porous glass layer on a base member is provided, wherein the reflectance is reduced and a ripple is suppressed. The optical member is provided with a base member and a glass layer holding a transparent material in the inside of a porous structure disposed on the base member, wherein in the thickness direction of the glass layer, the porosity in the base member side with respect to the center line of the glass layer in the thickness direction is smaller than the porosity in the side opposite to the base member with respect to the center line of the glass layer in the thickness direction.

Optical member, image pickup apparatus, and method for manufacturing optical member

The present invention provides an optical member having a high transmittance, wherein a composition change of a phase-separable base material glass film is suppressed. A method for manufacturing an optical member provided with a porous glass film on the base member includes the steps of forming a glass powder film containing a glass powder on the base member, forming a phase-separable base material glass film on the base member by heating and fusing the glass powder film in an atmosphere having an oxygen concentration of more than 20%, forming a phase-separated glass film on the base member by heating the base material glass film, and forming a porous glass film on the base member by subjecting the phase-separated glass film to an etching treatment.

Method for manufacturing a porous glass film

The present invention provides an optical member including a porous glass film on a base member, wherein a ripple is suppressed. The optical member includes the base member and the porous glass film disposed on the base member, wherein the porosity increases in the direction from the base member toward the porous glass film in an interfacial region between the base member and the porous glass film and the porosity is continuous in the film thickness direction from the base member to the surface of the porous glass film in the optical member.

An imaging apparatus for imaging a subject image from a lens on an imaging element through an optical filter has a porous body having pores which three dimensionally communicate with each other at least at a side opposite to the imaging element of the optical filter.

Imaging apparatus and image forming apparatus having continuous pores in three dimensions in porous body

Provided is a method of producing porous glass having pores with a uniform pore diameter entirely, particularly in the case of phase-separated glass, including selectively removing a denatured layer formed on the surface of glass easily. The method of producing glass includes: forming phase-separated glass containing silicon oxide, boron oxide, and an alkali metal oxide; bringing an alkaline solution held by a porous supporting member into contact with the denatured layer formed on the surface of the phase-separated glass to remove the denatured layer; and immersing the phase-separated glass with the denatured layer removed therefrom in an acid solution to form pores in the phase-separated glass.

Method of producing glass

The present invention provides a method for producing a porous glass layer easily, wherein a ripple is suppressed. A method for manufacturing an optical member provided with a porous glass layer on a base member includes the steps of forming an intermediate layer containing at least one of silicon, potassium, and aluminum on the base member, forming a phase-separable glass layer on the intermediate layer, forming a phase-separated glass layer on the base member by heating the intermediate layer and the phase-separable glass layer at a temperature higher than or equal to the glass transition temperature of the phase-separable glass layer, and forming a porous glass layer on the base member by subjecting the phase-separated glass layer to an etching treatment.

Method for manufacturing optical member

A method for manufacturing a porous glass includes: forming a phase-separated glass by heating at a temperature in a range of 300 to 500 degrees Celsius for 3 to 50 hours for phase separation of a glass body in which the concentration of SiOis 50 to 70 percent by weight, the concentration of BOis 15 to 40 percent by weight, the concentration of LiO is 1.0 to 8.0 percent by weight, the concentration of NaO is 2.0 to 8.0 percent by weight, the concentration of KO is 0.3 to 5.0 percent by weight, the total concentration of LiO, NaO, and KO is 3.5 to 15 percent by weight, and the ratio of the concentration of KO to the total concentration of LiO, NaO, and KO is 0.10 to 0.30; and forming a porous glass by etching the phase-separated glass.

Method for manufacturing porous glass, and method for manufacturing optical element

This invention provides a porous glass with a varied porous structure that shows an excellent optical performance. A method of manufacturing a porous glass comprising: a first step of forming a surface layer containing a boron compound and an alkali metal compound as main ingredients on a matrix glass containing a silicon oxide, a boron oxide and an alkali metal oxide; a second step of heat treatment the matrix glass and the surface layer for phase separation to form a phase-separated glass; and a third step of acid treatment the phase-separated glass to form the porous glass having pores.

Porous glass, method of manufacturing the same and optical element

An optical member includes an oxide layer that has a stable fine textured structure that is excellent in durability. The optical member includes a base material and an antireflection coating on a surface of the base material. The antireflection coating includes at least an oxide layer having a fine textured structure on the surface, and the oxide layer contains a phosphate compound. Furthermore, a method of manufacturing the optical member is provided.

Optical member and method of manufacturing the same

The present invention provides a porous glass having excellent antireflection performance for visible light. A porous glass includes a porous layer which is mainly composed of silica and which has pores attributed to spinodal phase separation and pores attributed to binodal phase separation.

Porous glass and optical member

Imaging apparatus and image forming apparatus having porous body with three-dimensional skeleton and interconnected pores

A DNA hybrid which comprises a porous oxide matrix and DNA immobilized thereon, and is useful for environmental clean-up, where the hybrid is prepared by removing a dispersion medium from a dispersion of colloidal oxide and DNA.

DNA hybrids and environment cleaning system employing DNA hybrids

A composite material is constituted by fine nano-oxide particles, a dispersant, and a transparent resin material. The dispersant includes a polymer of vinyl monomer having a binding acidic group. When &#x3c6; is a dimensionless number defined by an average particle size (nm) of the fine nano-oxide particles divided by nm, the polymer has a degree of polymerization of an integer of 3 or more and 8&#xd7;&#x3c6; or less with the proviso that the integer is a numerical value obtained by dropping a decimal fraction. The composite material is produced through a step of obtaining a dispersant comprising a polymer by polymerizing a vinyl monomer having a binding acidic group in the presence of polyamine or in an aqueous dilute dispersion, and a step of mixing the dispersant, fine nano-oxide particles, and a transparent resin material.

Composite material and production process of dispersant

Provided is a ferroelectric ceramic material containing BaTiOas a main component which can control a Curie temperature in a wide range, has no phase transition in the vicinity of a room temperature, and exhibits excellent ferroelectric characteristics. The ferroelectric ceramic material includes an oxide represented by the formula: (100&#x2212;a&#x2212;b)BaTiO.aBiO.bMO, where M represents a trivalent metal other than Bi, and a and b satisfy 1&#x2266;a&#x2266;15, 0&#x2266;b&#x2266;5, and 5&#x2266;a+3&#x2266;15 and M is preferably a trivalent metal selected from fifth period transition metals or rare earth metals having an atomic number of 59 or higher to 69 or lower.

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Yokohama, Japan

Zuyi Zhang