Duro-test Corporation

Other

Peter J Walsh

Raymond P Fontana

Luke Thorington

Ronald C Koo

Wolfgang E Thouret

A surface for reflecting light energy of a first frequency range while transmitting light energy of a second frequency range and an incandescent lamp employing such a surface utilizes an array of corner cube elements. Each element has three sides which are mutually perpendicular and meet at a common vertex. Each side of each element is a surface in the shape of a square. All edges of the three square sides have equal dimensions. The array of elements is arranged with each element except for extreme outer elements having all of its edges contiguous with corresponding edges of other elements so as to form a continuous surface of the elements such that the projection of outer edges of each element on a common plane through corners of each side diagonally opposite to the vertex of that element form a hexagon. At least one surface of each element being dichroic to allow transmission of light energy of the second frequency range while reflecting light energy of the first frequency range.

Corner cube array for use in incandescent lamps

A high-pressure mercury vapor lamp uses an envelope with an elliptical region which is coated on its interior surface. The coating reflects energy in the violet and passes energy in the green and yellow-green. By suppressing electron transitions which yield violet radiation, transitions which yield green and yellow-green radiation are enhanced, increasing lumen output by redistributing energy to more luminous lines in the line spectrum of mercury vapor plasma.

Energy-efficient electric discharge lamp with reflective coating

An incandescent lamp of the reflector type has an exit window on which a filter coating is located. The filter coating reflects infrared radiation and transmits visible radiation. The clamp also has a reflector which is opposed to the filter coating and which reflects both infrared and visible radiation. The filter coating and the reflector have surfaces which are parabolic, confocal, and orthogonal. The filament passes through the focus and is elongated along the focal axis of the lamp. Infrared radiation emitted by the filament from the focus is reflectd back to it after two reflections, of which one reflection will be off the filter coating and of which the other will be off the reflector. A large part of the light produced by the lamp is collimated.

Energy-efficient incandescent reflector lamp

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.

Energy-efficient lamp

An incandescent lamp has an envelope within which is enclosed an incandescent filament. The incandescent filament is surrounded by a tubular element with open ends. The element transmits visible radiation, and reduces but does not eliminate convection around the filament. This reduces the rate at which evaporated filament material is carried away from the filament and deposited elsewhere within the lamp. If desired, a filter coating may be placed on the element for reflecting infrared radiation back to the filament and transmitting visible radiation away from the filament and out of the lamp. The element may engage the filament leads for mounting purposes.

Incandescent lamp with extended filament lifetime

A filter for use in an incandescent lamp utilizing a transparent heat mirror coating on the lamp envelope for transmitting radiation in a selected portion of the visible range to produce a desired color and reflecting infra-red radiation back to the filament for increasing its temperature and thereby increasing its efficiency. The coating is preferably of the insulator/metal/inculator type having a layer of a metal sandwiched between two layers of an insulating material.

Selective color filter

An incandescent electric lamp having a filament which incandesces and produces a vapor of the metal of the filament which normally deposits on the wall. A coating is placed on the filament wall where the majority of the vapor would normally deposit to act as a reflecting coating so that the visible energy reflected from the coating will be transmitted through a portion of the wall which is not blackened by the vapor. The coating thickness is adjusted so that the deposit from the filament builds up on a nodal surface so that light absorption is small.

Incandescent electric lamp with means for reducing effects of deposition

An incandescent lamp utilizing an etalon type transparent heat mirror on the lamp envelope for transmitting radiation in the visible range produced by the lamp filament and reflecting infrared thermal radiation back to the filament for increasing its temperature and thereby increasing its efficiency.

Incandescent electric lamp with etalon type transparent heat mirror

In accordance with the present invention, a laser device is formed on an integrated circuit substrate, such as a silicon chip by sandwiching a thin-film amorphous semiconductor between reflective electrodes. The upper electrode is made only partially reflective so that, when an operating potential is applied between the electrodes, a stimulated emission of light energy in the infrared range is observed and this emission occurs through the upper electrode. To form a light amplifier, the lower reflecting electrode is omitted, so that the amorphous semiconductor and the substrate form a heterojunction which has low infrared reflectivity. In operating the amplifier, a potential is applied between the upper electrode and the substrate to control amplification. Incident radiation passes through the upper electrode and into the amorphous semiconductor and substrate and, in the process, is amplified in accordance with the value of the applied potential. This permits the incident radiation to be modulated in accordance with the applied potential. In a preferred embodiment incorporating the invention, at least one laser and an amplifier are incorporated on the same substrate as electronic circuits handling information signals. The laser is a source of light radiation and the amplifier is controlled with a voltage signal from the electronics to modulate laser radiation. Radiation is coupled between the laser and the amplifier and also out of the amplifier by means of optical wave guides which are fabricated on the substrate. The modulated radiation in the wave guide from the amplifier can then be provided directly to a fiber optic 'transmission line'.

Integrated circuit laser and electro-optical amplifier

An incandescent electric lamp having an envelope in the shape of an ellipse rotated about a center line and defining a circle of focal points, said envelope having thereon a coating which reflects infrared energy produced by the filament and at least a part of the coating transmitting all or a selected portion of the visible range light energy produced by a filament which is shaped and located so that at least a part of the filament lies on or adjacent to the focal circle so that infrared energy produced by the filament at one focal point on the circle will be reflected by the coating back to another focal point on the circle.

Incandescent lamp with ellipsoidal envelope and infrared reflector

An incandescent electric lamp having a coating to reflect infrared energy back to the filament to raise its operating temperature in which the envelope is shaped as an ellipsoid and the filament and envelope have a relationship to reduce losses due to aberration and to produce a more uniform temperature distribution along the filament.

Ellipsoidal envelope for incandescent lamp with infrared energy return

An incandescent lamp utilizing a transparent heat mirror coating on the lamp envelope for transmitting radiation in a selected portion of the visible range to produce a desired color and reflecting infrared thermal radiation back to the filament for increasing its temperature and thereby increasing its efficiency. The coating is preferably of the etalon type having a layer of an insulating material sandwiched between two layers of metal.

Incandescent lamp with selective color filter

An incandescent electric having a filament which incandesces and produces a vapor of the metal of the filament which normally deposits on the envelope wall. Structures are provided adjacent the filament on which vaporized filament material will deposit rather than deposit on the envelope wall where it would reduce the light output of the lamp.

Incandescent lamp with structure for collecting evaporated filament

An incandescent electric lamp utilizing an infrared (IR) reflector for directing IR energy back to the filament to increase its operating efficiency in which a reflector is used to redirect circulating infrared energy back to the wall of the envelope where it then can be redirected back to the filament, or reflected directly back onto the filament.

Incandescent electric lamp withheat recovery means

An electrodeless discharge lamp having a sealed elongated toroidal envelope containing an ionizable medium with means for inducing ionization of the medium including a radio frequency energy supply coil formed by coating a transparent conductive material on the envelope. The coil is mounted to reduce the stray radio frequency field and the torroidal envelope is formed to allow for convection cooling of the lamp.

Growing community of inventors

Stirling, NJ, United States of America

Peter J Walsh