摘要:
An illuminating device that can reduce illuminance unevenness of an irradiation target face with a simple construction is provided. In a pseudo sunlight illuminating device 1 having a lamp 22 for illuminating an irradiation target face 10A, a transmission light amount adjusting unit 60 for adjusting a transmission light amount so that the illuminance distribution on the irradiation target face 10a is made uniform is provided between the lamp 22 and the irradiation target face 10A, and the transmission light amount adjusting unit 60 is provided with a light transmission plate laminate member 64 which is constructed by stacking light transmission plates 65 which are constant in transmittance in a wavelength range of light to be transmitted and whose number corresponds to an adjustment amount of the transmission light amount so that incident light is reflected at each boundary of the front and back surfaces of each light transmission plate 65.
摘要:
A light source apparatus is capable of reliably enhancing the starting performance of a high pressure discharge lamp even during hot state just after extinguishing the high pressure discharge lamp by radiating a necessary and sufficient amount of a UV-light into a discharge bulb of the lamp using an UV-enhancer of a simple constitution without increasing the manufacturing cost is provided. An UV-enhancer for radiating a UV-light to a discharge bulb for enhancing the starting performance of a high pressure discharge lamp upon starting lighting includes a discharge tube connected in parallel to a lighting circuit of the lamp, and an external electrode of the discharge tube is formed as a metal holder that holds the outer periphery of the discharge tube so as to oppose the end face of an electrode seal portion of the lamp inserted through a bottom hole in a concave reflector and secures the electrode seal portion to an electrode lead protruding from the end face thereof.
摘要:
The present invention aims to suppress waste of charging power during charging and improve charging efficiency.A charging apparatus 1 for charging a cell group 24, in which a plurality of secondary cells 22 are connected in series, by supplying a charging current Ic to the secondary cells 22 is provided with an overcharge protection circuit 26 including discharge route circuits 34 provided to each of the secondary cells 22 and adapted to cause the secondary cells 22 to discharge during charging by connecting the secondary cells 22 to the discharge route circuits 34 based on cell voltages Vb of the secondary cells 22 or to stop discharging by cutting off the secondary cells 22 from the discharge route circuits 34; and a charger controller 10 for continuing charging while reducing the charging current Ic until the discharge of the secondary cell 22 having started discharging to the discharge route circuit 34 is stopped when the discharge of any one of the secondary cells 22 to the discharge route circuit 34 is started by the overcharge protection circuit 26.
摘要:
Disclosed is a tungsten electrode for ultra-high pressure mercury lamps comprising an electrode rod, a first coil wound around the front end side of the electrode, and a second coil wound around the electrode rod starting from the end of the first coil. The tungsten wire of the first coil is smaller in diameter than the tungsten wire of the second coil.
摘要:
A laminate type light emitting diode device having excellent heat radiation performance and high output capability is provided. A plurality of reflection type light emitting diode units 10 each of which includes a light emitting diode 2 and a dichroic mirror 3 in a hollow metal holder case 5 having high thermal conductivity so as to face each other are joined to one another through joint members 4 formed of electrical insulating material, thereby constructing the laminate type light emitting diode device 100.
摘要:
A short-arc discharge lamp capable of reducing the likelihood of cracks starting at an end face of a reflection mirror neck unit. Such cracks can be caused by heat generated from the discharge lamp. The short-arc discharge lamp includes a glass reflection mirror having a reflection surface of an even-order function on an inner surface thereof and formed by embossing. The short-arc discharge lamp is arranged with respect to an optical axis of the reflection mirror. A base of the discharge lamp is fixed to an insertion hole in a hollow neck unit formed in a bottom center of the reflection mirror. Furthermore, a base peripheral portion on the inner surface of the insertion hole in the hollow neck unit has a cylindrical shape with a narrow portion formed to extend from the cylindrical shape toward the reflection surface. Finally, an embossed portion extends from the narrow portion toward the reflection surface while diverging to contact the reflection surface.
摘要:
A high pressure discharge lamp according to the present invention is a high pressure discharge lamp in which the top ends of a pair of electrodes opposed in a discharge vessel 2 of an arc tube 1 are formed each into a substantially semispherical shape and a protrusion 10 to form an arc spot is formed at each top end, wherein all of the relation: 0.3••L/I••1.0 for an inter-electrode distance L(mm) between the electrodes and a lamp current I(A) during stable lighting, the relation: 1.2••10−7••X/Y••1.1••10−5 for a molar amount X(mol) of bromine in the bromide sealed in the discharge vessel 2 and an inner volume Y(ml) of the discharge vessel 2, and the relation: 9••W3/2/I••65, for a weight W(mg) of tungsten at the top end of each electrode 3 formed into a substantially semispherical shape are satisfied, and the lighting frequency of a rectangular wave during stable lighting is 45 Hz or higher.
摘要:
An apparatus for performing a weather resistance test on a composite material having a metallic, inorganic, or organic base member, and an organic material covering the base member. The apparatus includes a sample holding device disposed in a sample chamber for holding a sample of the composite material. An artificial light source irradiates light substantially in the ultraviolet light area to one surface of the sample. A dipping mechanism dips the sample in a corrosive ionized water, and dew condensation is formed through a temperature control device disposed in the sample holding device, working with a moisture source, for causing dew condensation in the surface of the sample. A cleaning device is provided for cleaning the surface of the sample, and steaming of the sample is performed through the use of a heating element disposed in the sample chamber, and the moistening means, for steaming the sample in an atmosphere of high temperature and high humidity. A control system controls the execution of the operation of the light source, the dipping mechanism, the dew condensation devices, the cleaning device, and the steaming devices, in a sequential manner.
摘要:
A high-pressure metal vapor discharge lamp comprises: an arc tube, which is shunted by a series circuit of a thermal switch and a nonlinear ceramic capacitor, a pyroelectric current bypassing resistor connected in parallel to the nonlinear ceramic capacitor, and a lamp outer bulb incorporating the arc tube, the thermal switch, the nonlinear ceramic capacitor and the resistor. Because of this construction, the nonlinear ceramic capacitor is prevented from early deterioration, thus lengthening the service life of the discharge lamp.
摘要:
A metal vapor discharge lamp has a luminous tube constituted by a translucent ceramic tube member, end caps hermetically fixed to both ends of the translucent ceramic tube member, and electrode supporting tubes hermetically inserted into respective end caps. One of the electrode supporting tubes serves also as an exhaust tube for evacuation and also as a reservoir for a metal charged in the luminous tube. The outer end extremity of this electrode supporting tube is hermetically sealed through fusion by application of heat. This hermetic seal is formed by fusing the end of the electrode supporting tube by application of heat thereto, while keeping a heat-shielding/absorbing plate held in close contact with the electrode supporting tube.