Abstract: Navigational running light retrofit system comprises a position tube that is inserted into a U.S. Naval specified navigational running light fixture and is further positioned, aligned and sealed using existing elements of the navigational running light fixture being retrofit. The positioning tube, having a generally tubular form, is a receiver for a commercially available LED navigational running light having cylindrical form. LED navigational running light is modified to secure a plate to the top surface of the assembly. This stabilizer plate has a similar diameter to the inner housing of the navigational running light fixture being retrofit, whereby stabilizing the retrofit system assembly when subjected to extreme mechanical shock. The positioning elements of the navigational running light retrofit system cooperate with the elements of the navigational running light fixture being retrofit to align and maintain alignment of the light exiting the fixture at the direction and angle.

Abstract: A thermal management system for extending the life and operational effectiveness of UVC LEDs utilized in an air disinfection device, includes a hollow airflow chamber having a first end and a second end on opposite sides of a length of the hollow airflow chamber; a fan configured to generate airflow through the airflow chamber; a UVC LED array coupled to a framework, the framework including cut-outs for airflow, and the framework is coupled to the hollow airflow chamber in the path of the airflow. An air disinfection system and ceiling light troffer fixture are described herein.

Abstract: Navigational running light retrofit system comprises a position tube that is inserted into a U.S. Naval specified navigational running light fixture and is further positioned, aligned and sealed using existing elements of the navigational running light fixture being retrofit. The positioning tube, having a generally tubular form, is a receiver for a commercially available LED navigational running light having cylindrical form. LED navigational running light is modified to secure a plate to the top surface of the assembly. This stabilizer plate has a similar diameter to the inner housing of the navigational running light fixture being retrofit, whereby stabilizing the retrofit system assembly when subjected to extreme mechanical shock. The positioning elements of the navigational running light retrofit system cooperate with the elements of the navigational running light fixture being retrofit to align and maintain alignment of the light exiting the fixture at the direction and angle.

Abstract: A beacon for obstruction lighting (10) comprising a frame with a base (12) and a side, the side including a side wall (18) extending upwardly from the base with the side wall having at least one channel (26) formed therein and with a channel electric contact located proximate the channel, and an LED strip (28) having an LED electric contact (33) which is inserted in the at least one channel, and a cover (22) over the frame.

Abstract: An LED lamp has dual modes of operation from fluorescent lamp fixtures. A first circuit powers at least one LED in a first mode of operation when first and second power pins at a first end of the lamp are inserted into power contacts of the fixture that are directly connected to power mains. A second circuit powers at least one LED in a second mode of operation when the second power pin at the first end of the lamp and a third power pin at a second end of the lamp are inserted into power contacts of a fixture powered from an electronic ballast. First and second conduction control means permit the second circuit to power at least one LED during the second mode of operation.

Abstract: A sensor includes an enclosure having a housing and a lower cassette that cooperate to provide a sealed volume in which an optical sensor assembly is enclosed and protected. The optical sensor assembly includes a circuit board with a light source and a light detector. The sensor assembly further includes a light pipe that guides light from the sensor onto a target and a lens guides reflected light from the target onto the light detector. Lower ends of the light pipe and the lens are supported by a recess in the lower cassette. Upper ends of the light pipe and the lens are supported by an upper cassette. The upper cassette is positively located and mounted to the circuit board and received in an internal receptacle in the lower cassette. Mounting the lower cassette to the housing encloses the optical sensor assembly in the proper alignment.

Abstract: An LED lamp has dual modes of operation from fluorescent lamp fixtures. A first circuit powers at least one LED in a first mode of operation when first and second power pins at a first end of the lamp are inserted into power contacts of the fixture that are directly connected to power mains. A second circuit powers at least one LED in a second mode of operation when the second power pin at the first end of the lamp and a third power pin at a second end of the lamp are inserted into power contacts of a fixture powered from an electronic ballast. First and second conduction control means permit the second circuit to power at least one LED during the second mode of operation.

Abstract: An LED lamp has dual modes of operation from fluorescent lamp fixtures. A first circuit powers at least one LED in a first mode of operation when first and second power connector pins at a first end of the lamp are inserted into power receptacles of the fixture that are directly connected to power mains. A second circuit powers at least one LED in a second mode of operation when the second power connector pin at the first end of the lamp and a third power connector pin at a second end of the lamp are inserted into power receptacles of a fixture powered from an electronic ballast. First and second conduction control means permit the second circuit to power at least one LED during the second mode of operation.

Abstract: A sensor includes an enclosure having a housing and a lower cassette that cooperate to provide a sealed volume in which an optical sensor assembly is enclosed and protected. The optical sensor assembly includes a circuit board with a light source and a light detector. The sensor assembly further includes a light pipe that guides light from the sensor onto a target and a lens guides reflected light from the target onto the light detector. Lower ends of the light pipe and the lens are supported by a recess in the lower cassette. Upper ends of the light pipe and the lens are supported by an upper cassette. The upper cassette is positively located and mounted to the circuit board and received in an internal receptacle in the lower cassette. Mounting the lower cassette to the housing encloses the optical sensor assembly in the proper alignment.

Abstract: Improved side-light distribution systems are disclosed. One exemplary system includes a light source and a side-light distribution member. The light source supplies light to the side-light distribution member having (1) an net port on the first end of the member for receiving the light and (2) a second end having a reflective means. The inlet port consists of part of the surface area of the first end of the member. The reflective means associated with the second end of the member receives light from the first end and directs light towards the first end. At least part of a surface area of the first end of outside of the inlet port includes a reflective means for receiving the light from the second end and directing the light towards the second end of the rod.

Abstract: A transversal change of the position of a measured sample surface exposed to the influence of visible radiation for example actinic light, is measured interferometrically by a reflecting target, which is in mechanical contact with the measured sample surface, and reflects a measuring beam, generated together with a reference beam by a laser source, and the transversal change of the position of the measured sample surface is detected from the phase difference of harmonic waves in the beam of interfering radiation. The device involves, for example, a special detection connection of photodetectors, a measuring unit and a basic module with a computer, the design of reflecting targets for liquid and solid samples, an optomechanical dimension transmitter and a holder of solid samples.

Abstract: Elongated lighting system comprises an elongated light pipe having first and second ends, with light supplied to those ends by at least one light source, via first and second light couplers that condition light to increase reflections within the light pipe. Light-extraction structure on the light pipe extracts light from the side of the pipe. An indentation in the light pipe has a depth and has surfaces oriented with respect to the pipe so as (1) to redirect light from the first light source that reaches the indentation after passing once through a plane adjacent the indentation, back through the plane and towards the first end; and (2) to sufficiently increase the average angular distribution of light reflected from the indentation and passing back through the plane as would cause at least 50 percent more reflections of the foregoing light within the pipe in the absence of the light-extraction structure.

Abstract: Improved side-light distribution systems are disclosed. In one embodiment, an efficient side-light distribution system includes a LED light source; a light coupler for receiving light from the LED light source at a first end and providing light at a second end to an elongated light pipe, and the elongated light pipe receives light from the LED light source at a first end and transmitting the light towards a second end. The coupler transforms at least the angular distribution of at least 70% of the light from the LED light source into an appropriate angular distribution needed for total internal reflection at a second end within the elongated light pipe. The light coupler includes a light-extraction means between the first and second ends of the light coupler for extracting light out of a side of the light coupler. At least part of the light within the light pipe is extracted out of a side of the light pipe, between the first and second ends of the light pipe, by a light-extraction means.

Abstract: Elongated lighting system comprises an elongated light pipe having first and second ends, with light supplied to those ends by at least one light source, via first and second light couplers that condition light to increase reflections within the light pipe. Light-extraction structure on the light pipe extracts light from the side of the pipe. An indentation in the light pipe has a depth and has surfaces oriented with respect to the pipe so as (1) to redirect light from the first light source that reaches the indentation after passing once through a plane adjacent the indentation, back through the plane and towards the first end; and (2) to sufficiently increase the average angular distribution of light reflected from the indentation and passing back through the plane as would cause at least 50 percent more reflections of the foregoing light within the pipe in the absence of the light-extraction structure.

Abstract: A transversal change of the position of a measured sample surface exposed to the influence of visible radiation for example actinic light, is measured interferometrically by a reflecting target, which is in mechanical contact with the measured sample surface, and reflects a measuring beam, generated together with a reference beam by a laser source, and the transversal change of the position of the measured sample surface is detected from the phase difference of harmonic waves in the beam of interfering radiation. The device involves, for example, a special detection connection of photodetectors, a measuring unit and a basic module with a computer, the design of reflecting targets for liquid and solid samples, an optomechanical dimension transmitter and a holder of solid samples.