Abstract:
A solid-state lamp is described that includes a wavelength conversion component located at one end of the lamp. The solid-state lamp comprises: one or more solid-state light emitting devices (typically LEDs); a thermally conductive body; at least one duct; and a photoluminescence wavelength conversion component remote to the one or more LEDs, located at one end of the lamp. The lamp is configured such that the duct extends through the photoluminescence wavelength conversion component and defines a pathway for thermal airflow through the thermally conductive body to thereby provide cooling of the body and the one or more LEDs.
Abstract:
A light emitting device comprises: a thermally conductive substrate (MCPCB); at least one LED mounted in thermal communication with a surface of the substrate; a housing attached to the substrate and configured such the housing and substrate together define a volume that totally encloses the at least one LED, the housing comprising at least a part that is light transmissive (window); and at least one phosphor material provided on an inner surface of the housing within said volume said phosphor being operable to absorb at least a part of the excitation light emitted by the at least one light emitting diode and to emit light of a second wavelength range. The housing is attached to the substrate such that the volume is substantially water tight, preferably air/gas tight.
Abstract:
Methods and systems for electron spin MRI (eMRI) and novel methods for fabricating N@C 60 fullerenes using the discovery that certain endohedral fullerenes can be used as functional paramagnetic materials exhibiting increased relaxation times. These endohedral fullerenes provide improved labels for use in electron spin resonance (ESR) detection systems.
Abstract:
A solid-state linear lamp comprises a co-extruded component, the co-extruded component comprising an elongate lens and a layer of photoluminescent material. The elongate lens is for shaping light emitted from the lamp and comprises an elongate interior cavity. The layer of a photoluminescent material is located on an interior wall of the elongate interior cavity. The lamp further comprises an array of solid-state light emitters configured to emit light into the elongate interior cavity.
Abstract:
A LED-lamp (lighting bar) comprises a plurality of solid state light emitters (LEDs) configured as an elongate (linear) array and a generally concave cylindrical light reflective surface disposed along the length of the array of LEDs. The concave light reflective surface is configured to direct light over an illumination plane located to a side of the lamp. The LEDs can be configured such that their emission axes are oriented to the illumination plane at an angle of between 0° and 90. The lamp can further comprise a second generally concave cylindrical light reflective surface in which the concave light reflective surfaces are configured to direct light over illumination planes located on respective sides of the lamp. There is also disclosed a panel lamp and sign incorporating the lamp(s) of the invention.
Abstract:
A novel spin resonance microscope is disclosed, the microscope design comprising an integrated evanescent wave probe and scanning tunneling microscope tip. The probe and tip may be either the same structure, or they may be separate structures. The integrated design allows for coherent excitation of precessing electron spin states in the sample such that spin resonance may be detected because the tunneling current is modulated by the spin resonance. Spin resonance may be affected by either adjacent nuclei, or by adjacent electrons. The present apparatus requires significantly reduced power inputs, such that the dead time of the system is short, and relaxation phenomena may be evaluated without swamping the instrument's electronics.
Abstract:
A phosphor converted white light emitting device comprises a solid-state light emitter (LED) operable to generate blue light with a dominant wavelength in range 440nm to 470nm; yellow to green-emitting phosphor operable to generate light with a peak emission wavelength in a range 500 nm to 550 nm; and a red-emitting manganese-activated fluoride phosphor such a manganese-activated potassium hexafluorosilicate phosphor (K 2 SiF 6 :Mn 4+ ). The yellow to green and red-emitting phosphors are incorporated as a mixture and dispersed throughout a light transmissive material with an index or refraction of 1.40 to 1.43. In some embodiments the light transmissive comprises a dimethyl-based silicone. The device can further comprise an orange to red-emitting phosphor operable to generate light with a peak emission wavelength of 580 nm to 620 nm.
Abstract:
A photoluminescence color display comprises a display panel that displays red, green and blue sub-pixel areas, an excitation source operable to generate excitation radiation for operating the display, and a combined layer of photoluminescence materials and filter pigments. The combined layer comprises at least one photoluminescence material, such as a phosphor material or quantum dots, that is operable to emit light corresponding to red, green and blue sub-pixel areas of the display in response to said excitation radiation.
Abstract:
A solid-state lamp is described that includes a first light emission zone and a second light emission zone, where the first light emission zone is longitudinally spaced apart from the second light emission zone. The light emission zones comprise a photoluminescence wavelength conversion component and a solid state light emitting device. The lamp comprises a lower body, a central body, and an upper duct, where the central body, and the upper duct together define at least one passage way/duct for thermal airflow.
Abstract:
An LED based lamp comprises: an enclosure with an opening that comprises a light emission plane through which light is emitted from the lamp; a plurality of LEDs located along at least one wall of the enclosure and operable to generate light of a first wavelength range, wherein the LEDs are configured such that in operation their emission axis is oriented within a plane that is substantially parallel with or directed away from the light emission plane; and a first light reflective surface located on the base of the enclosure and configured such that in operation light is reflected through the light emission plane. A light emitting sign comprises the lamp of the invention with a light transmissive display surface overlying the light emission plane.