摘要:
A light source, with electrodes of alternating polarity attached to a substrate in an excimer ultraviolet (UV) lamp, for generating a plasma discharge between each of the electrodes. The shape of the substrate can shape and control the plasma discharge to reduce exposure of materials susceptible to attack by the halogens. The electrodes can be located such that the plasma discharge occurs in a region where it produces less contact of the halogens with the vulnerable areas of the lamp enclosure. The materials, such as the electrodes, substrate, and envelope, can be selected to withstand corrosive materials. In another embodiment, a plurality of sealed tubes, at least some of which contain an excimer gas are positioned between two electrodes.
摘要:
A generator for a flash device includes at least a first capacitor bank, which includes at least one capacitor of a first type and at least a second capacitor bank, which includes at least one capacitor of a second type. The first capacitor bank is connectable to a charger via a first switch and the second capacitor bank is connectable to a charger via a second switch. The generator is configured to individually control the first switch and the second switch so that the first capacitor bank and the second capacitor bank can be individually charged to the same or different voltages. Since the first capacitor bank and the second capacitor bank can be simultaneously discharged, it is possible to achieve a desired energy level and color temperature from a flash device connected to the generator.
摘要:
A gas discharge lamp has a gas and has a cathode, an anode, and an ignition electrode. Individual discharges of a series of lamp discharges are spaced at least one millisecond from each other, and the individual discharges are generated by providing an electrical charge between the cathode and the anode and providing two or more electrical pulses to the ignition electrode. The second and following electrical pulses occur within a predetermined time of the first pulse. The electrical charge between the cathode and anode is of sufficient voltage and current to create an electrical arc between the cathode and the anode with the gas is ionized.
摘要:
A system for luminance characterization of a luminaire includes a ballast coil and a multi-tap capacitor connected in series with the ballast coil, The multi-tap capacitor has a plurality of tap capacitors integrated into a capacitor housing. A plurality of switches are each coupled to one of the plurality of tap capacitors for selectively coupling the tap capacitors together to produce a multi-tap capacitance corresponding to a configuration of the plurality of switches. A lamp is connected in series with the multi-tap capacitor and the ballast coil. A photometer is located to measure light intensity of the lamp and to produce a lumen output measurement. A memory is used to store a database having a plurality of lumen output measurements, each corresponding to a multi-tap capacitance corresponding to all configurations of the plurality of switches.
摘要:
The invention relates to a method for increasing the useful life of a recognition light of an aircraft, comprising flashing a flashtube; monitoring the light output of the flashtube; comparing the measured light output of the flashtube with a reference value corresponding to a predetermined light intensity value; increasing the power delivered to the flashtube when the measured light output drops below the reference value, thereby to increase the intensity of the flashes emitted by the flashtube to above the reference value. Furthermore the invention relates to a recognition light (10) for an aircraft, a recognition light (10) comprising a parabolic reflector (38), a method for monitoring the useful life of an aircraft recognition light, a method for providing visual notification of required replacement of an anti-collision light prior to failure of an anti-collision light, and a lamp (34) fixture.
摘要:
An electrical switch (100, 100') comprises first and second switch elements (102, 102', 104) including respective first and second electrically conductive flexible domes (150, 170) for selectively making electrical connections. The second switch element (104) is disposed adjacent the first switch element (102, 102') with an electrical conductor (160, 164, 166) therebetween. An actuator (190) is movable for exerting force on the second switch element (104) via a spring (180), and for exerting force on the first switch element (102, 102') via the spring (180) and the second switch element (104). The second flexible dome (170) may have an actuating force that is less than the actuating force of said first flexible dome (150). A flashlight (200) may include a controller 260 coupled to an electrical switch (102, 102', 104) proximate a head end of a housing 200 and to an electrical switch (102, 102', 104) proximate a tail end of the housing 200.
摘要:
The present invention provides a capacitor charging circuit (10) that efficiently charges capacitive loads (44). In particular, circuits and techniques are preferably provided for using current from both the primary (12) and secondary (14) windings of a transformer (22) to control ON-time and OFF-time of a switch (24). This arrangement preferably yields an adaptable ON-time and adaptable OFF-time switch that is capable of rapidly charging capacitor loads (44) ranging from as low as zero volts to several hundred volts. The output voltage is preferably measured indirectly to prevent unnecessary power consumption. In addition, control circuitry can be provided to conserve power by ceasing the delivery of power to the capacitor load (44) once the desired output voltage is reached. Control circuitry preferably operates an interrogation timer that periodically activates the power delivery cycle to maintain the capacitor output load in a constant state of readiness.
摘要:
The electronic flash unit disclosed comprises: a transformer (14) to vary voltages of a power supply; an accumulator (16) composed of a main capacitor (17) to charge an electric energy supplied from the transformer (14); a lamp unit (4) provided with a flashlamp (20), set inside of a reflector (19), that flashes by discharging of energy storages in the main capacitor (17) upon applying a voltage on a trigger terminal (21); and a trigger circuit (10) to generate the voltage to apply on the trigger terminal (21), wherein at least the lamp unit (4) is coated with an insulation material.