Abstract:
An apparatus for providing a photoluminescent light source is disclosed. In one embodiment, the apparatus comprises a light source that emanates light of a particular spectrum, photoluminescent material which converts light from the light source to light of another spectrum, and a selective mirror which reflects light generated by the light source and transmits light generated by the photoluminescent material. The photoluminescent material may be arranged so as to provide a plurality of light sources that emanate light of various colors.
Abstract:
A high intensity discharge lamp includes a dielectric substrate, a first electrode near the dielectric substrate, a second electrode spaced from the first electrode and near the dielectric substrate, with a discharge gas contained and enclosed by a shaped reflector and window. The reflector shapes are adapted to the particular process. The lamp to be used in volumetric chambers with high reflectivity walls and in arrangements of multiple lamps for high processing rates and long penetration lengths. Erosion of the dielectric is controlled by the use of high-pressure gases, and filtration and the use of electric fields reduce lamp contamination. The dielectric and electrodes are gas cooled on the outside and through the use of perforated electrodes. A small diameter tubular dielectric is used to increase light emission, improve re-imaging capability and increase the electrical impedance.
Abstract:
Fluorescent lamp (1) comprising a glass discharge vessel (2) in which a gas is present, which discharge vessel (2) is on two sides provided with a tubular end portion (3) having a longitudinal axis, which end portion (3) includes a glass stem (5), wherein an exhaust tube (6) extends axially outwardly from said stem (5) for supplying and/or discharging gases during the production of the lamp (1), wherein an electrode (8) extends axially inwardly through the stem (5) for generating and maintaining a discharge in the discharge vessel (2). The fluorescent lamp (1) is characterised in that it meets at least one of the following equations: ξ = R 1 R 2 + 1 R 3 R 4 + 1
Abstract:
Fluorescent lamp (1) comprising a glass discharge vessel (2) in which a gas is present, which discharge vessel (2) is on two sides provided with a tubular end portion (3) having a longitudinal axis, which end portion (3) includes a glass stem (5), wherein an exhaust tube (6) extends axially outwardly from said stem (5) for supplying and/or discharging gases during the production of the lamp (1), wherein an electrode (8) extends axially inwardly through the stem (5) for generating and maintaining a discharge in the discharge vessel (2). The fluorescent lamp (1) is characterised in that it meets at least one of the following equations: 1 null = R 1 R 2 + 1 R 3 R 4 + 1
Abstract:
The formation of leachable mercury upon disposal or during TCLP testing of mercury vapor discharge lamps is substantially prevented by incorporation of an organic or inorganic metal completing agent in the lamp structure or in the test solution.
Abstract:
Apparatus for generating light utilizing the principle of electrostatic induction between two relatively moving dielectric materials of opposite polarity. A first hollow member is filled with an ionizable gas and includes at least one electrode supported in close proximity to the inner surface of the member. A second member formed of a dielectric material of opposite polarity partially surrounds the first member in close proximity thereto. The two members are moved relative to one another and the consequent electrostatic induction ionizes the gas within the first member.
Abstract:
A method and device for generating spectral radiation characteristic of a liquid sample. An electrical voltage is applied to a body of conductive liquid, the voltage being in excess of the breakdown voltage of the vapor state of the liquid and causing a current sufficient to raise the temperature of the liquid to cause the liquid to vaporize and form a bubble. The bubble formed is sufficiently restricted so that the potential across the bubble can rise until electrical breakdown and an electrical discharge only across the bubble occurs.