An airport runway light for use as a runway approach light for a runway lighting system, the runway light having a light body with a base configured to support the runway light in a light socket of a runway lighting system, the base having an electrical connection to electrically connect the runway light to the runway lighting system, the light further including one or more output windows wherein the runway light has a high-efficiency infrared source and one or more infrared reflectors to direct the infrared source outwardly through the one or more output windows, the infrared source including a silicon nitride element wherein the infrared source produces virtually no detectable visible light and with much less power consumption.

An airport runway light for use as a runway approach light for a runway lighting system, the runway light having a light body with a base configured to support the runway light in a light socket of a runway lighting system, the base having an electrical connection to electrically connect the runway light to the runway lighting system, the light further including one or more output windows wherein the runway light has a high-efficiency infrared source and one or more infrared reflectors to direct the infrared source outwardly through the one or more output windows, the infrared source including a silicon nitride element wherein the infrared source produces virtually no detectable visible light and with much less power consumption.

A light source device that includes a light device assembly and a monolithic lens. The light device assembly includes a first substrate with opposing top and bottom surfaces and a plurality of cavities formed into the top surface, a plurality of light source chips each disposed at least partially in one of the plurality of cavities and each including a light emitting device and electrical contacts, and a plurality of electrodes each extending between the top and bottom surfaces and each electrically connected to one of the electrical contacts. The monolithic lens is disposed over the top surface of the first substrate, and includes a unitary substrate with a plurality of lens segments each disposed over one of the light source chips.

A light source device that includes a light device assembly and a monolithic lens. The light device assembly includes a first substrate with opposing top and bottom surfaces and a plurality of cavities formed into the top surface, a plurality of light source chips each disposed at least partially in one of the plurality of cavities and each including a light emitting device and electrical contacts, and a plurality of electrodes each extending between the top and bottom surfaces and each electrically connected to one of the electrical contacts. The monolithic lens is disposed over the top surface of the first substrate, and includes a unitary substrate with a plurality of lens segments each disposed over one of the light source chips.

To provide an optical filter having shielding effects against near ultraviolet rays and near infrared rays. An optical filter comprising a transparent resin body having a single layer or multilayer structure, and containing a near ultraviolet absorbing dye (U) which is a compound represented by the following formula (U) and which has an absorption maximum at a wavelength of from 370 to 425 nm and has a molar absorptivity at the maximum absorption wavelength of at least 50,000 [L/(mol.Math.cm)], and a near infrared absorbing dye (A) which has an absorption maximum at a wavelength of from 600 to 800 nm: ##STR00001##
In the formula (U), Y is an oxygen atom, a methylene group or a dimethylene group, R.sup.1 is a monovalent hydrocarbon group which may have a substituent, or the like, R.sup.2 to R.sup.5 are a hydrogen atom, an alkyl group, an alkoxy group or the like, and X is a bivalent group represented by any one of the formulae (X1) to (X5) or the like.

An optically transmissive light directing sheeting and daylight control structures employing the same. The light directing sheeting includes a core light redirecting layer employing TIR surfaces embedded into the sheeting and may further include one or more outer layers having light diffusing surface microstructures. The TIR surfaces intercept and reflect a portion of sunlight propagating through the core layer such that the light directing sheeting partially transmits and partially redirects the sunlight towards a plurality of divergent directions, forming relatively high bend angles.

An ultraviolet absorbing film, a light absorbing film, an optical element, an optical unit, and a light illuminating apparatus are disclosed. The ultraviolet absorbing film is provided on at least one surface of an optical element to reduce internal reflections therein and includes a transition metal oxide of a transition metal selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ce, and combinations thereof that contains no organic constituent. The ultraviolet absorbing film is formed by a process including applying an ultraviolet absorbing paint including an oxide precursor of the transition metal on at least one surface of the optical element; and a binder component or a solvent in which the oxide precursor is dissolved; and heating the coating to a predetermined temperature at which the oxide precursor forms the transition metal oxide and the binder or the solvent substantially completely decomposes or volatilizes.

Provided is a lighting device including a light source for emitting light, a sensor configured to detect infrared radiation from a plurality of locations along a path in the field of view of the sensor, at least one attenuation element arranged between at least one location of the plurality of locations and the sensor so as to attenuate or block infrared radiation emitted from the at least one location before it reaches the sensor, and a controller. The at least one attenuation element is further arranged in relation to the field of view of the sensor for the signal output from the sensor to indicate, when an occupant is moving along the path, a direction of movement of the occupant along the path. The controller is arranged to control the light source based on the direction of movement of the occupant, and a cover plate is arranged between the at least one location of said plurality of locations and the sensor, and also arranged between the at least one location and the light source, wherein the cover plate is transparent or translucent to said visible light, wherein the at least one attenuation element forms part of the cover plate, and wherein outside, or away from, the attenuation element, the cover plate is at least partly transparent to infrared radiation.

Provided is a lighting device including a light source for emitting light, a sensor configured to detect infrared radiation from a plurality of locations along a path in the field of view of the sensor, at least one attenuation element arranged between at least one location of the plurality of locations and the sensor so as to attenuate or block infrared radiation emitted from the at least one location before it reaches the sensor, and a controller. The at least one attenuation element is further arranged in relation to the field of view of the sensor for the signal output from the sensor to indicate, when an occupant is moving along the path, a direction of movement of the occupant along the path. The controller is arranged to control the light source based on the direction of movement of the occupant, and a cover plate is arranged between the at least one location of said plurality of locations and the sensor, and also arranged between the at least one location and the light source, wherein the cover plate is transparent or translucent to said visible light, wherein the at least one attenuation element forms part of the cover plate, and wherein outside, or away from, the attenuation element, the cover plate is at least partly transparent to infrared radiation.

A short wavelength infrared (SWIR) energy emitting system or material for producing SWIR energy from an emission source emitting electromagnetic energy. The SWIR energy system or material comprises a phosphor material, an electromagnetic energy blocking member, a substrate for delivering the system or material to an electromagnetic energy emission source, and optionally, a securing member. The SWIR energy system or material may be in the form of a tape, sheet, or other laminar material capable of producing short wave infrared emission when excited at wavelengths shorter than that of the emission.