Patent ID: 8258687

Claim:
A coaxial waveguide electrodeless lamp, comprising: a gas-fill vessel for containing gas being substantially hollow, substantially transparent or substantially translucent and substantially in the shape of a closed, annular cylinder, the gas-fill vessel further comprising: a first end; a second end; an outer diameter; an inner diameter; a first annular cap on the first end; a second annular cap on the second end; a closed cavity defined by the outer diameter, the inner diameter, the first annular cap and the second annular cap; a hollow core bounded by the inner diameter; a length from the first end to the second end; and a long axis; a central conductor that is substantially cylindrical, having a length and having a diameter substantially similar to the inner diameter of the gas-fill vessel, the central conductor having a long axis substantially parallel to the long axis of the gas-fill vessel, the central conductor fitting substantially within the hole of the gas-fill vessel for at least a portion of the length of the central conductor; an outer conductor that is substantially transparent or substantially translucent and substantially in the shape of a cylindrical shell, the outer conductor having a length and a long axis substantially parallel to the long axis of the central conductor and substantially parallel to the long axis of the gas-fill vessel, the outer conductor having a diameter substantially similar to the outer diameter of the gas-fill vessel, the outer conductor fitting substantially around the gas-fill vessel for at least a portion of the length of the outer conductor; and a gas-fill contained inside the closed cavity of the gas-fill vessel, the gas-fill comprising at least one substance selected from the group consisting of gas, liquid, and solid, whereby the coaxial waveguide electrodeless lamp emits light through the outer conductor when electromagnetic radiation carried by the outer conductor and the central conductor interacts with the gas-fill.