Nikon Corporation

Kazuhiro Kido

Soichi Owa

Shunji Watanabe

Junji Suzuki

Hidemitsu Toba

Masahiko Sugisaki

Shizuo Matsumaru

An optical member to be arranged in an optical path of a light, includes an optical medium made of an insulator or a semiconductor; a first element provided at a first position in the optical medium and made of a first electric conductor having a width approximately same as or smaller than a wavelength of the light, the first position being a position in the optical path; and a second element provided at a second position, in the optical medium, different from the first position, and made of a second electric conductor having a width approximately same as or smaller than the wavelength of the light, the second position being a position in the optical path.

Optical material, optical element and method for manufacturing same

An optical material which has a relative permeability different from 1 to light having a wavelength in, for example, the infrared region or shorter than the infrared region and which is stable in structure, and a liquid and a solid (optical element) using the optical material. The optical material is a powder used as a component of a liquid or solid to which an illuminating light is irradiated, and includes a large number of resonating elements which constitute the powder and each of which is formed of a conductor having a width approximately same as or smaller than a wavelength of the illumination light, and a protective film which is formed of a disc-shaped insulator, wherein an entire surface of each of the split-rind resonators is covered by the protective film.

Optical material, optical element, and method for manufacturing same

An optical material which has a relative permeability different from 1 to light having a wavelength in, for example, the infrared region or shorter than the infrared region and which is stable in structure, and a liquid and a solid (optical element) using the optical material. The optical material is a powder used as a component of a liquid or solid to which an illuminating light is irradiated, and includes a large number of resonating elements which constitute the powder and each of which is formed of a conductor having a width approximately same as or smaller than a wavelength of the illumination light, and a protective film which is formed of a disc-shaped insulator, wherein an entire surface of each of the split-ring resonators is covered by the protective film.

The optical glass of the present invention comprises a composition in terms of weight ratio within the range of 0 to 14.8 wt % of SiO , 30 to 60 wt % of B O , 0 to 17.5 wt % of Al O , 0 to 0.4 wt % of Li O, 0 to 3 wt % of Na O, 0 to 3 wt % of K O, 0 to 5 wt % of MgO, 0 to 30 wt % of CaO, 0 to 30 wt % of SrO, 0 to 35 wt % of BaO, where RO (MgO&plus;CaO&plus;SrO&plus;BaO) is 8 to 35 wt %, 0 to 20 wt % of ZnO, 0 to 6.5 wt % of La O , 0 to 15 wt % of Gd O , 0 to 15 wt % of Y O , 0 to 10 wt % of Ta O , 0 to 9.5 wt % of ZrO , 0 to 1 wt % of As O , and 0 to 0.5 wt % of Sb O ; and has a refractive index (nd) of 1.52 to 1.65, an Abbe number (vd) of 55 to 61, and an 80% transmission wavelength (at a thickness of 10 mm including no reflection loss) of 330 nm or shorter.

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Sagamihara, Japan

Kazuhiro Kido