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US 9,299,554 B2Granted
Lucent waveguide electromagnetic wave
AssigneeCeravision Limited
InventorAndrew Simon Neate
Life of this patent
Estimating the term…
Abstract
A Lucent Waveguide Electromagnetic Wave Plasma Light Source has a fabrication (1) of quartz with an inner closed void enclosure (2) is formed of 8 mm OD, 4 mm ID drawn tube. It is sealed at its inner and outer ends (3,4). Microwave excitable plasma material is sealed inside the enclosure. Its outer end (4) protrudes through an end plate (5) by approximately 10.5 mm and the overall length of the enclosure is approximately 20.5 mm. The tube (71) from which the void is formed is continued backwards from the inner end of the void enclosure as an antenna sheath (72). The 2 mm thick end plate (5) is circular and has the enclosure (2) sealed in a central bore in it.
Claims38
A Lucent Waveguide Electromagnetic Wave Plasma Light Source (LUWPL) comprising:
- a fabrication of solid-dielectric, lucent material, the fabrication providing at least:
- a closed void containing electromagnetic wave excitable plasma material;
- a Faraday cage:
- at least substantially enclosing the fabrication,
- being at least partially lucent, for light emission from it and
- delimiting a waveguide, the waveguide having:
- a waveguide space, the fabrication occupying at least part of the waveguide space;
- and
- at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide at a position at least substantially surrounded by solid dielectric material;
- whereby on introduction of electromagnetic waves of a determined frequency a plasma is established in the void and light is emitted via the Faraday cage;
- the arrangement being such that there is:
- a first region of the waveguide space extending between opposite sides of the Faraday cage at this region, this first region:
- at least partially accommodating the inductive coupling means and
- having a relatively high volume average dielectric constant and
- a second region of the waveguide space extending between opposite sides of the Faraday cage at this region, this second region:
- having a relatively low volume average dielectric constant as compared to that of the first region, and
- being occupied by:
- the fabrication of solid-dielectric, lucent material and either
- the closed void containing electromagnetic wave excitable plasma material alone or
- the closed void containing electromagnetic wave excitable plasma material and a cavity within the fabrication or
- the closed void containing electromagnetic wave excitable plasma material and an empty portion of the waveguide space between the fabrication and the Faraday cage or
- the closed void containing electromagnetic wave excitable plasma material and both a cavity within the fabrication and an empty portion of the waveguide space between the fabrication and the Faraday cage;
- wherein:
- the at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide extends out of the first region and into the second region.
21 more elements
A Lucent Waveguide Electromagnetic Wave Plasma Light Source (LUWPL) comprising:
- a fabrication of solid-dielectric, lucent material, the fabrication providing at least:
- an enclosure of a closed void containing electromagnetic wave excitable plasma material;
- a Faraday cage:
- enclosing the fabrication,
- being at least partially lucent, for light emission from it and
- delimiting a waveguide, the waveguide having:
- a waveguide space, the fabrication occupying at least part of the waveguide space and the waveguide space having
- an axis of symmetry;
- and
- at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide at a position at least substantially surrounded by solid dielectric material;
- whereby on introduction of electromagnetic waves of a determined frequency a plasma is established in the void and light is emitted via the Faraday cage;
- wherein:
- the arrangement is such that with the waveguide space notionally divided into equal front and rear semi-volumes:
- the front semi-volume is:
- at least partially occupied by the fabrication with the said void in the front semi-volume and is
- at least partially enclosed by a front, lucent portion of the Faraday cage via which portion light from the void can radiate,
- the rear semi-volume has the at least partially inductive coupling means extending in it and
- the volume average of the dielectric constant of the content of the front semi-volume is less than that of the rear semi-volume:
- wherein:
- the at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide extends out of the rear semi-volume and into the front semi-volume.
17 more elements
A Lucent Waveguide Electromagnetic Wave Plasma Light Source (LUWPL) comprising:
- a fabrication of solid-dielectric, lucent material, the fabrication providing at least:
- a closed void containing electromagnetic wave excitable plasma material;
- a Faraday cage:
- enclosing the fabrication,
- being at least partially lucent, for light emission from it and
- delimiting a waveguide, the waveguide having:
- a waveguide space, the fabrication occupying at least part of the waveguide space;
- and
- at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide at a position at least substantially surrounded by solid dielectric material;
- whereby on introduction of electromagnetic waves of a determined frequency a plasma is established in the void and light is emitted via the Faraday cage;
- wherein:
- the fabrication is of quartz and
- a body of alumina is provided in the waveguide space to raise the volume average of the dielectric constant of the waveguide space, the inductive coupling means being provided at least partially in the alumina body;
- wherein:
- the at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide extends out of the alumina body and into the quartz fabrication.
12 more elements
A Lucent Waveguide Electromagnetic Wave Plasma Light Source (LUWPL) comprising:
- a fabrication of solid-dielectric, lucent material, the fabrication providing at least:
- a closed void containing electromagnetic wave excitable plasma material;
- a Faraday cage:
- enclosing the fabrication,
- being at least partially lucent, for light emission from it and
- delimiting a waveguide, the waveguide having:
- a waveguide space,
- at least a part of the fabrication therein;
- and
- at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide at a position at least substantially surrounded by solid dielectric material;
- whereby on introduction of electromagnetic waves of a determined frequency a plasma is established in the void and light is emitted via the Faraday cage;
- wherein:
- the volume average of the dielectric constant of the fabrication is less that the dielectric constant of its material;
- and
- the at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide extends into the fabrication having the closed void.
12 more elements
A Lucent Waveguide Electromagnetic Wave Plasma Light Source (LUWPL) comprising:
- a fabrication of solid-dielectric, lucent material, the fabrication providing at least:
- a closed void containing electromagnetic wave excitable plasma material;
- a Faraday cage:
- enclosing the fabrication,
- being at least partially lucent, for light emission from it and
- delimiting a waveguide, the waveguide having:
- a waveguide space, the fabrication occupying at least part of the waveguide space;
- and
- at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide at a position at least substantially surrounded by solid dielectric material;
- whereby on introduction of electromagnetic waves of a determined frequency a plasma is established in the void and light is emitted via the Faraday cage;
- wherein:
- the Light Source further comprises a body of solid dielectric material in the waveguide space, the body abutting the fabrication and having the inductive coupling means extending in it, and
- the at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide extends out of the said body and into the second fabrication.
10 more elements
Dependencies are inferred from the claim text.