Abstract:
The invention describes a gas-discharge lamp (1) comprising a vessel (5), which vessel (5) is partially coated with at least one longitudinal stripe (SH, SH′) arranged on the surface of the vessel (5) below a horizontal plane (P) through a longitudinal axis (X) through the centre of the lamp (1) such that, on each side of the lamp, an angle (βH1, βH2) subtended at the lamp centre by the horizontal plane (P) and an upper edge (16, 17) of the longitudinal stripe (SH, SH′) on that side of the lamp comprises at least 10°, more preferably at least 13°, most preferably at least 15°. The invention also describes a reflector (8) for a lamp (1), comprising a reflective interior surface realised to deflect light (L20A, L20B, L21A, L21B) originating from the lamp (1) outward to give a specific beam profile (3) with a bright/dark cut-off line (31) and a shoulder (32), and wherein the lamp (1), in particular a lamp (1) according to any of claims 1 to 12, is positioned horizontally in the reflector (8), and wherein the reflective interior surface comprises at least one beam-shaping region (81 A, 81B) realised to deflect a portion (L21A, L21B) of the light (L20A, L20B, L21A, L21B), emitted from the lamp (1) between 7.5° and 15° below a horizontal plane (P), at a specific region (21A, 21B) within the beam profile (3). The invention further describes a lighting assembly (9) comprising such a reflector (8) and a lamp (1), in particular a lamp (1) according to the invention.
Abstract:
The invention relates to an electric lamp comprising a light-transmitting pear shaped lamp vessel (1) with a top part (8) and a centre part (9) in which a light source (2) is arranged in the centre part, said electric lamp provided with a light-absorbing medium (6) exhibiting a spectral transition in the visible range, at least a part of the lamp vessel (1) being provided with an interference film (5), wherein the light absorbing-medium (6) provided at the top part of the vessel (8) has an absorption, which is 1.5 to 5 times the absorption of the light-absorbing medium provided at the centre part (9) of the vessel.
Abstract:
A discharge tube comprised of a cylinder ceramic envelope sealed at its two ends by plate-shaped positive electrode and negative electrode, wherein the entire outside circumference of at least the negative electrode end of the ceramic envelope is printed with insulating ink, whereby it is possible to prevent insulation degradation due to deposition or dirt or moisture on the surface of the envelope and greatly lighten the burden of handling and maintenance and management.
Abstract:
A greensheet comprising an inorganic pigment and an inorganic matrix component is applied to a surface of a glass substrate and fired for fixing. The formed shading film has a portion whose thickness is 90% or more of the maximum thickness of the shading film within the range of 0.5 mm from an edge of the shading film. Thus, a shading film that has distinct end faces and has an excellent thickness uniformity can be formed with a good positional accuracy. Therefore, a lamp having a highly precise light distribution property can be obtained. In addition, a lamp having such a property can be obtained with a few steps and at a low cost.
Abstract:
Disclosed in this invention is an optical filter to enhance the contrast and brightness of images from a color display. The filter comprises suitable dyes and a polymer matrix, applied in a suitable form on the display unit. Such filters have utility in devices based on CRTs, plasmas and the like.
Abstract:
An energy-efficient lamp having a waveguide mounted to the envelope of the lamp which may be of the incandescent type. The waveguide passes visible radiation and reflects infrared radiation. The waveguide may be a reticulated layer of an electrically conductive material such as silver and the reticulations may be regularly or irregularly distributed over the surface of the envelope.
Abstract:
A solid state light source adapted for viewing in an environment of ambient light. A solid state light-emitting device is provided for emitting a narrow band of visible light. An optical filter is disposed in the path between the light emitting device and the viewer. The filter is a polymeric matrix which contains at least one metal derivative of tetraphenylporphin. In a preferred embodiment of the invention the polymeric matrix is an acrylic ester polymer which overlays the transparent encapsulating surface of a red-emitting GaAsP diode.