The University of Tokyo

Japan Aerospace Exploration Agency

Nikon Corporation

Canon Kabushiki Kaisha

Tdk Corporation

Nippon Electric Glass Co., Ltd.

Atsunobu Masuno

Hiroyuki Inoue

Shinichi Yoda

Kentei Yono

Hiroshi Yamamoto

Motoi Ueda

Kohei Yoshimoto

Tatsunori Kawashima

Takehiko Ishikawa

Yasutomo Arai

Fumio Sato

Michio Endo

Tomoko Yamada

Hidesada Natsui

Shingo Eguchi

Provided is optical glass containing, in terms of mol % of cations: 10 to 60% of a Lacomponent; more than 0% and up to 75% of a Gacomponent; and 5 to 75% of a Nbcomponent, in which a total amount of the Lacomponent, Gacomponent, and Nbcomponent is 60 to 100%.

Optical glass, optical element including optical glass, and optical apparatus

Provided is a method that enables a crystal-free glass material to be stably produced by a containerless levitation technique. A glass materialhas a first surfacefacing a forming surfaceand a second surfacelocated on a side opposite to the forming surface. The first surfaceincludes a central portionand a peripheral portionlocated outside of the central portion. Gas is jetted through a gas jet hole at a flow velocity and a flow volume at which a glass material satisfying R&#x3c;R&#x3c;Ris formed where Rrepresents a radius of curvature of the central portion, Rrepresents a radius of curvature of the peripheral portion, and Rrepresents a radius of curvature of the second surface

Method for producing glass material, device for producing glass material, and glass material

An optical glass including B, Laand Nbas cationic components constituting the glass, wherein the optical glass satisfies the following expressions represented in cation percentages:

Optical glass, optical element, and method for manufacturing optical glass

Dielectric ceramic composition comprising a barium titanate including barium titanate having hexagonal structure as a main component, and an element 'M', an effective ionic radius of the 'M' is within &#xb1;20% with respect to an effective ionic radius of 12-coordinated Baor with respect to an effective ionic radius of 6-coordinated Ti, an ionic valence of the &#x201c;M&#x201d; is larger than that of the Ba or Ti.

Dielectric ceramic composition

A titanium-containing oxide glass having a bulky form and substantially having a chemical composition represented by the formula: (M1)(M2)(Ti(M3))O[wherein M1 represents an element selected from Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na and Ca; M2 represents at least one element selected from Mg, Ba, Ca, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na, Sc, Y, Hf, Bi and Ag; M3 represents at least one element selected from V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, Rh, Pd, Al, Si, P, Ga, Ge, In, Sn, Sb and Te; and x, y1, y2 and z satisfy the following requirements: 0&#x2266;x&#x2266;0.5, 0&#x2266;y1&#x3c;0.31, 1.4&#x3c;y2&#x3c;3.3, and 3.9&#x3c;z&#x3c;8.0, provided that x+y1&#x2260;0 when M1 represents Ba, and y1&#x2260;0 when both M1 and M2 represent Ba].

Titanium-containing oxide glass and method for production thereof

Growing community of inventors

Tokyo, Japan

Atsunobu Masuno