121 results about "Arc lamp" patented technology

This invention relates to the zonal transmission of data by the modulation of the light output of arc lamps or discharge lamps; including the visible or invisible light output of fluorescent lamps, mercury vapor lamps, high or low-pressure sodium lamps, metal-halide based lamps, or other arc or discharge lamps. The method results in an easily installed, easily maintained, and economical to purchase, optical-wave communications system which exploits the existing infrastructure of a building or facility to facilitate the transmission of data in individual zones; thereby facilitating the transmission of wide-area as well as zonal-specific data to compatible receivers, and further facilitating the determination of location of remote devices or users, and the delivery or exchange of information or data, utilizing limited range transmission techniques.

A xenon arc searchlight incorporates a high frequency / high efficiency electronic circuit that allows lamp ballasting and charging of the system battery to occur over a wide range of external DC power supplies. The xenon arc searchlight has a converter circuit coupled to both the battery, the ballasting circuit and the arc lamp for converting DC voltage from the battery to pulse width modulated switched current to the arc lamp in which the DC voltage is switched by parallel switching transistors. The ballisting circuit is controllable by a switch to vary current supplied to the converter circuit and hence intensity of the lamp which discrete steps in intensity of the lamp are not visually perceptibly different between one step to a next step in the sequence of steps of the current to the lamp. The lamp, ballast, battery and charger are provided in a single rugged package.

A light delivery technique includes optical configurations as well as the associated methods that generate a ring beam from a linear light source. In one embodiment, a remote light source module delivers illumination light to a fundus camera and / or slit lamp. In another embodiment, an arrangement combines the use of a light pipe homogenizer and a ring beam transformer for efficiently collecting light from a substantially axially linear light source, homogenizing the collected light that lacks low angle flux relative to the optical axis, and transforming the light into a ring beam with a substantially improved low angle flux distribution. In still another embodiment, light emitted from a substantially axially linear light source is directly collected by a curved surface mirror and spatially filtered into a ring beam. The ring illumination beam can be co-axially projected on a sample such as the pupil of a human eye and at the same time the light beam also has a large enough relatively uniform angular flux distribution so that a wide area on the retina of the eye can be uniformly illuminated.

A flashlight has a body containing control circuitry, with a lamp connected to the body and to the control circuitry. A photodetector is connected to the body and the control circuitry, and faces the lamp to sense an operating condition of the lamp. The control circuitry operates the lamp in a start up mode until signaled by the photodetector that the lamp is properly operating. After this, the lamp is operated in a normal mode. The flashlight may have a switch with a button that moves through a range of positions. The switch may have several contact elements, and the button may have an actuator registered with each of the contact elements. The actuators may be of different heights, to provide a sequence of switch operation. Some of the actuators may be movable to allow the button to be actuated further after an initial contact is made.

A short arc lamp driving circuit includes a trigger boosting circuit, a flash current control circuit, and a closed loop exposure control and calibration circuits that, when combined, can produce short pulses of light with short time separation, quasi-continuous illumination light, and meanwhile, an extremely large dynamic range of delivered and / or calibrated light power or energy.

A high intensity discharge (HID) light fixture includes a reflector frame which supports an independent high reflectivity reflecting surface. The reflector frame supports a glass lens with anti-reflective coatings on its surfaces and a visor or extension that also supports an independent high reflectivity reflecting surface. The high reflectivity reflecting surface has various sections that adjust portions of the beam created by the fixture to better place light on a target area. The reflector frame is attachable to a lamp cone. An adjustable knuckle attaches between to a cross arm on a pole and the lamp cone. An HID lamp, when mounted in the lamp cone, has its arc tube substantially surrounded by the high reflectivity reflecting surfaces of the reflector frame and visor. A lamp positioning mechanism automatically adjusts orientation of the arc lamp over a range of pivot angles for the lamp cone relative the knuckle. The HID lamp has an increased metal halide salt pool and does not include white oxide coatings at opposite ends. The lamp and the lamp positioning mechanism are configured to position the arc tube of the lamp horizontal over the normal range of aiming angles for the fixture. The modified HID lamp, its operating position, the high reflectivity reflecting surfaces, and other aspects of the fixture produce more light from the fixture than without these features for the same amount of energy to operate. Optionally, a ballast circuit can save energy over operating life of the lamp.