摘要:
A metal vapor discharge lamp and a lighting fixture are downsized without causing breakage of an outer tube because of optimization of a positional relation among the outer tube (34), an inner tube (32), and an arc tube (40). The metal vapor discharge lamp has the arc tube, the inner tube housing the arc tube, and the outer tube housing the inner tube. The positional relation satisfies the relation of 2 x A + B ‰¥ 1.06. In a cross section of the lamp (the cross section of the arc tube is unshown for convenience), A (mm) represents the shortest distance between the arc tube and the inner tube along a line in a radial direction of the inner tube, and B (mm) represents a distance between the inner tube and the outer tube on a line segment C that is extension of the line.
摘要:
A plasma illumination device with microwave pump contains a hermetic housing, provided with a lid with an aperture, in which are axially-positioned a magnetron, and a power source which feeds power to the magnetron. The device contains: a microwave resonator, which is positioned coaxially with the housing and has a translucent side wall and end wall, and a reflective bottom which is installed in the aperture of the housing lid; and an electrodeless plasma lamp, installed in the microwave resonator, in the region of the antinode of the oscillations, with the ability to rotate on a support rod, which rod is affixed by the other end thereof to a drive shaft, and the axis of which is coaxial to the axis of the housing. A coaxial line of communication passes parallel to the axis of the housing and allows for transmitting microwave energy from the magnetron to the microwave resonator, and is provided with a communication loop at the end thereof, said loop being positioned in the microwave resonator. The illumination device contains: a plurality of heat sinks, which are positioned on the inner walls of the housing and which transfer heat from, installed in the housing, the magnetron and power source, which generate heat which is drawn into the external environment via the wall of the housing; and also a translucent hermetic hollow cylinder, which is installed coaxially and hermetically on the lid of the housing above the microwave resonator, and which is used for protecting the microwave resonator against the effects of the external environment.
摘要:
A gasket (100a; 100b; 100c; 100d; 200a; 200b; 300a; 300b; 300c) for use in an ultraviolet light source (202; 302) is provided. The gasket includes a body portion formed of an elastomeric material. The body portion is electrically conductive.
摘要:
The invention provides a light source that is favorable for the lighting of fresh foods required to show colors of meat, vegetables and the like more vividly than a high-chroma and high-color-rendering type of high-pressure sodium lamp and a method of manufacturing the same. In a light source according to the present embodiment of the present invention comprises at least a light emitting portion to emit visible rays; the light emitting portion is provided with such a luminous spectrum that if a wavelength region of 380 to 780 nm of visible light is split into a first wavelength region of a violet-bluish colors of wavelengths of 380 to 490 nm, a second wavelength region of greenish colors of wavelengths of 490 to 570 nm, a third wavelength region of yellowish colors of wavelengths of 570 to 590 nm, and a fourth wavelength region of orange-reddish colors of wavelengths of 590 to 780 nm, and a distribution ratio of an integrated value of energy strength of light from the light emitting portion calculated for each of the four wavelength regions is set to be "y1 : y2 : y3 : y4" (where y1 + y2 + y3 + y4 = 100), the following formula is obtained. 7 ≤ y 1 ≤ 11 , 15 ≤ y 2 ≤
摘要:
Provided is a ceramic metal halide lamp that is favorable for illuminating fresh foods in the manner of a high-chroma, high-color-rendering, high-pressure sodium lamp. A method for producing the ceramic metal halide lamp, which has a light-emitting tube formed from a translucent ceramic in which are sealed a starting noble gas, mercury, and an additive, and a translucent outer tube that houses the light-emitting tube, contains: a wavelength region splitting step for splitting the wavelength region (380-780 nm) of visible light into the four wavelength regions of a violet-blue color system, a green color system, a yellow color system, and an orange-red color system; and an additive setting step for setting the composition and amount added of the additive in a manner so that the ratio of the integrated value of the energy strength of light from the light-emitting tube calculated for each of the four wavelength regions is 6 ± 3 : 18 ± 5 : 6 ± 3 : 70 ± 11 (where the total value is 100).