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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 3. Отображено 3.
17-12-2014 дата публикации

Optical diode

Номер: GB0002514993A
Автор: PALIKARAS GEORGE [GB], KALLOS THEMOS [GB], PALIKARAS GEORGE, KALLOS THEMOS, GEORGE PALIKARAS, THEMOS KALLOS
Принадлежит:

An optical diode 103 has a circular polarisation splitter 107, a first circular polariser 109 and a second circular polariser 111. The circular polarisation splitter is arranged to receive at least partially unpolarised light 153 and output right-handed circular polarised light 155 along a first optical path and left-handed circular polarised light 157 along a second optical path. The first circular polariser is arranged on the first optical path and transmits right-handed circular polarised light and reflects left-handed circular polarised light. The second circular polariser is arranged on the second optical path and transmits left-handed circular polarised light and reflects right-handed circular polarised light. The diode may comprise an optical metamaterial with a negative dielectric permittivity and may be made from liquid crystal molecules in a cholesteric or helical arrangement. The diode may be used in a photovoltaic device.

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Номер записи: 1
18-09-2013 дата публикации

Increasing intensity of electromagnetic source with optical metamaterial

Номер: GB0002500232A
Автор: PALIKARAS GEORGE [GB], KALLOS THEMOS [GB], PALIKARAS GEORGE, KALLOS THEMOS, GEORGE PALIKARAS, THEMOS KALLOS
Принадлежит:

A device is arranged to couple with an electromagnetic source 401, such as an LED light source to increase luminous efficiency. The device comprises a first optical metamaterial arranged to increase the intensity of radiation at a predetermined wavelength. The optical meta material has a periodic reflective component 405 having a dimension no greater than the predetermined wavelength. The periodic reflective component may comprise a regular planar grid or array of metal reflectors on a dielectric support. The LED may be mounted on a reflective surface 403 and the metamaterial may include a fluorescent phosphor material to convert radiation at the predetermined wavelength to a visible wavelength. A second optical metamaterial arranged to increase the intensity of radiation at a second wavelength may be layered on the first metamaterial.

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Номер записи: 2
02-10-2013 дата публикации

Device to couple electromagnetic imaging radiation from a source medium into an electromagnetic imaging target

Номер: GB0002500719A
Автор: PALIKARAS GEORGE [GB], KALLOS EFTHYMIOS [GB], PALIKARAS GEORGE, KALLOS EFTHYMIOS, GEORGE PALIKARAS, EFTHYMIOS KALLOS
Принадлежит:

There is provided a device arranged to couple electromagnetic-imaging radiation from a source medium into an electromagnetic-imaging target, the device comprising a first dielectric component having a thickness no greater than a wavelength of the electromagnetic-imaging radiation and wherein the first dielectric component supports a planar array of first conducting elements, wherein each first conducting element has a first dimension no greater than a first wavelength of the electromagnetic-imaging radiation. The first conducting elements may be arranged to resonate at the first wavelength of the electromagnetic imaging radiation.

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Номер записи: 3