Canon Kabushiki Kaisha

Hitachi Cable, Inc.

Katsumoto Hosokawa

Shuhei Yamamoto

Ryota Seto

Yasuhiro Tanaka

Yoshinori Sugiura

Toshikazu Takata

Takahiro Kojima

Toshihide Hasegawa

Yasuhiro Kohsaka

Kazuko Nakazono

Hiroyuki Kubo

Kenji Asano

Kazutaka Takeuchi

Yoshiyuki Ando

Yasuhito Koyama

Takeaki Kumagai

Seiji Kamimura

Yuuki Honda

Provided is a reflective optical element that is lightweight and excellent in damping capacity. In the reflective optical element, a resin layer having an optical surface is formed on a metal substrate, and a reflective film is formed on the optical surface, and also, the metal substrate includes an alloy containing Mg as a main component.

Reflective optical element and stereo camera device

The present invention relates to a cycloolefin resin composition, a molded article of the cycloolefin resin composition, and an optical element, and in particular, to a resin composition containing inorganic particles in a resin, a molded article of the resin composition, and an optical element formed of the molded article.

Cycloolefin resin composition, molded article thereof, and mirror

To provide a light-shielding film for optical element having durability under high temperature and high humidity conditions and resistance to a cleaning liquid. A light-shielding coating film for optical element containing: a cured substance at least containing an epoxy resin, titania fine particles, a dye, and an amine curing agent, in which the equivalent ratio (A/E) of the active hydrogen equivalent weight (A) of the amine curing agent and the epoxy equivalent weight (E) of the epoxy resin and the compounding ratio (A'/E&#x2032;) of the amine curing agent amount (A&#x2032;) and the epoxy resin amount (E&#x2032;) satisfy the following expression 1,1.1&#x2266;(&#x2032;)/())&#x2266;1.7.&#x2003;&#x2003;(Expression 1)

Light-shielding coating material and light-shielding film for optical element and optical element

The present invention relates to a light-shielding coating including a resin composition containing at least an epoxy resin, a coloring agent including a dye, and titania fine particles having an average primary particle diameter of 1 nm or more and 100 nm or less and including an organic solvent dissolving or dispersing the resin composition. The concentration of the titania fine particles is 20% by mass or more and 60% by mass or less of the resin composition.

Light-shielding coating, light-shielding film, and optical element

A formed article is made from a resin composition containing a thermoplastic resin, first inorganic particles having a mean volume diameter of primary-particle of 10 nm to 100 nm, both inclusive, and second inorganic particles having a mean volume diameter of primary-particle of 120 nm to 10000 nm, both inclusive. One hundred (100) parts by mass of the resin composition contains 9.0 to 40.5 parts by mass of the first inorganic particles and 4.5 to 36.0 parts by mass of the second inorganic particles.

Resin composition, formed article, and mirror

A diol from which a resin material having high processability and a high refractive index can be manufactured, a polycarbonate resin and a polyester resin which is a polymer of the diol, and a molded article and an optical element formed of the polymer. The diol is represented by the general formula (1) shown below; the polycarbonate resin and the polyester resin are polymers thereof; and the molded article and the optical element are formed of the polymers, wherein R1 and R2 each independently denote one of a hydrogen atom and an alkyl group having 1 or more and 6 or less carbon atoms; Q denotes one of an oxyethylene group, a thioethylene group and a single bond.

Diol, and polycarbonate resin or polyester resin

There are provided an organic-inorganic composite having a high refractive index and a low Abbe number in which metal oxide particles of at least one type is added to a polymer containing a repeating unit having the general formula (1) described in Claim, and a molded product and an optical element made of the organic-inorganic composite. In the general formula (1), R1 and R2 independently denote a hydrogen atom or an alkyl group having 1 or more and 6 or less carbon atoms, and Q denotes an oxyethylene group, a thioethylene group, or a single bond.

Organic-inorganic composite, molded product, and optical element

An optical synthetic resin composed of: a synthetic resin; and fine particles dispersed in the synthetic resin at a ratio of 0.1 vol % or more to 50 vol % or less, each having a maximum length of 1 nm or more to 30 nm or less, in which part of surfaces of the fine particles are modified with functional groups which themselves repel each other, and a distance between two arbitrary adjacent fine particles among the fine particles is in a range of 0.1 nm or more to 500 nm or less. The two arbitrary adjacent fine particles attract each other with an intermolecular force, thereby making it possible to provide an optical composite deviating from an additivity range.

Optical composite material and optical element

An acid dianhydride, together with a diamine, is heated in an organic polar solvent in the presence of &ggr;-caprolactone or &bgr;-butyrolactone as an acid catalyst to prepare a polyimide having an average molecular weight of 10,000 to 300,000. This production process can realize the production of a polyimide which is soluble in a solvent and has high processability and stability.

Growing community of inventors

Tokyo, Japan

Katsumoto Hosokawa