Abstract:
A flashlamp provides a ruggedized yet simple-to-manufacture construction capable of operating at high average output power over a long life. The flashlamp construction includes a glass tube (12) with an electrode assembly (24) detachably secured to each end. The electrode assembly includes an end cap (26) to which an electrode support (28) is attached, with a first end (32) of the electrode support protruding inside of the glass tube, and a second end (44) of the electrode support protruding outside of the glass tube. The electrode support (28) is made from a suitable electrical conductor. An electrode (34) is threaded onto the first end of the electrode support (28) without the use of brazing or other attachment techniques that might introduce impurities. An electrode lug (36) is attached to or near the second end of the electrode support, outside of the glass tube, and provides a means for making electrical contact with the electrode (34). The end cap includes threads (30) so as to engage corresponding threads (22) on the inside of an attachment ring (16). One attachment ring is secured and sealed to each end of the glass tube. The electrode assemblies are attached to each end of the glass tube by simply threading the end caps into the attachment rings. An indium washer (42) placed between the end cap and attachment ring effectuates a vacuum seal between the end cap and glass tube.
Abstract:
A wall-stabilized infared flash tube has a glass bulb with a flash chamber therein with a cathode lead having an electrode member welded thereto inserted in the flash chamber, the flash chamber, the lead, and the electrode member having dimensions selected for minimizing the influences of white light on the output of the flash tube, so as to enhance the spectrum of the infared output. The flash chamber preferably has a length no longer than 20 mm, and an interior diameter in the range of approximately 0.6 mm to approximately 1.3 mm. A method for manufacturing such a flash tube includes the steps of welding the electrode member to the lead at one location, inserting the lead and electrode combination into a flash chamber of a glass bulb having suitable dimensions, and fusing the lead vacuum-tight to the glass bulb.
Abstract:
A flash discharge lamp in which a tubular glass bulb is sealed at both ends by a cathode metal cap and an anode metal cap, respectively; a cathode material member is mounted on the top of an intermediate member planted on the bottom of the cathode metal cap; an adhesive is tamped in the gap between each of the metal caps and the outer peripheral surface of the tubular glass bulb; and a discharge is produced between the anode metal cap and the cathode material member.
Abstract:
A xenon flash tube having a glass bulb within which an ellipsoidal reflector is supported so as to be spaced from the walls of the bulb. Anode and cathode electrodes in the bulb are located to provide an arc gap positioned near one focus of the reflector and are supported on wires held by an insulating button in the reflector. A fine wire trigger electrode is mounted in the bulb so that the free end thereof is disposed between the anode and cathode electrodes. In addition to xenon, a gaseous fill may include a dopant, such as helium, to increase the hold-off voltage and prevent self-ionization.
Abstract:
A method is provided whereby a high density of metallic atoms may be obtained in the plasma of a flash lamp by deposition of the desired metal substantially uniformly over the inside of an evacuated tube. Applying a pulse of current which vaporizes the metal produces the desired results.