摘要:
A glass rod (34) extending through and sealed to the exhaust tube (20) of an electrodeless SEF fluorescent discharge lamp (10) has a metal support member (36) at one end thereof for supporting an amalgam (32) at or near the apex (24) of the lamp envelope (12). The metal support member (36) may comprise a spiral-shaped wire (362), a wire screen (365), or a wire basket (36c). Preferably, the amalgam (32) is maintained in contact with the apex (24) of the lamp envelope (12). If desired, the metal support member (36) may comprise a magnetic material to allow for magnetic transport of the amalgam assembly during lamp processing. The metal support member (36) restricts spreading of the amalgam (32) when in a liquid state; and the glass rod (34) provides rigid support for the amalgam (32) independent of lamp orientation.
摘要:
A SrAl 12 O 19 green luminescent material is doped with Mn 2+ activator ions and at least one trivalent rare earth sensitizer ion species. Preferably, the material contains four rare earth ions: Ce 3+ , Pr 3+ , Gd 3+ and Tb 3+ . Optionally, a portion of the aluminum may be substituted with magnesium. The material may be used as a display device or lamp phosphor or as an X-ray diagnostic or laser scintillator.
摘要:
A silicon flake comprising silicon in a sufficient quantity is inserted into the arc tube of a high-intensity, metal halide discharge lamp in order to avoid a substantial buildup of free halogen, thereby extending the useful life of the lamp.
摘要:
A mercury-free ultraviolet (UV) discharge source (10) includes an elongated envelope (14) having a diameter in a preferred range from approximately 2 to 3 cm, and thermionically emitting electrodes (16). The envelope contains a rare gas fill (xenon or krypton, including mixtures of these with other rare gases) at a pressure in a range from approx-imately 10 millitorr to approximately 200 millitorr. A power supply (22) is arranged for ionizing the rare gas fill and generating a discharge (12) with a current in a range from approximately 100 to approximately 500 milliamperes (mA). The UV discharge source has an efficiency and output comparable to existing mercury-based low-pressure discharge sources and is intended for use with a suitable phosphor capable of converting the UV radiation to visible light in a fluorescent lamp.
摘要:
A mercury-free ultraviolet (UV) discharge source (10) includes an elongated envelope (14) having a diameter in a preferred range from approximately 2 to 3 cm, and thermionically emitting electrodes (16). The envelope contains a rare gas fill (xenon or krypton, including mixtures of these with other rare gases) at a pressure in a range from approx-imately 10 millitorr to approximately 200 millitorr. A power supply (22) is arranged for ionizing the rare gas fill and generating a discharge (12) with a current in a range from approximately 100 to approximately 500 milliamperes (mA). The UV discharge source has an efficiency and output comparable to existing mercury-based low-pressure discharge sources and is intended for use with a suitable phosphor capable of converting the UV radiation to visible light in a fluorescent lamp.
摘要:
A glass rod (34) extending through and sealed to the exhaust tube (20) of an electrodeless SEF fluorescent discharge lamp (10) has a metal support member (36) at one end thereof for supporting an amalgam (32) at or near the apex (24) of the lamp envelope (12). The metal support member (36) may comprise a spiral-shaped wire (362), a wire screen (365), or a wire basket (36c). Preferably, the amalgam (32) is maintained in contact with the apex (24) of the lamp envelope (12). If desired, the metal support member (36) may comprise a magnetic material to allow for magnetic transport of the amalgam assembly during lamp processing. The metal support member (36) restricts spreading of the amalgam (32) when in a liquid state; and the glass rod (34) provides rigid support for the amalgam (32) independent of lamp orientation.
摘要:
A silicon flake comprising silicon in a sufficient quantity is inserted into the arc tube of a high-intensity, metal halide discharge lamp in order to avoid a substantial buildup of free halogen, thereby extending the useful life of the lamp.