Abstract: The invention describes a light emitting diode array module (30) comprising a plurality of light emitting diode structures (10a, 10b), wherein the light emitting diode structures (10a,10b) are arranged such that there is an optical cross talk between the light emitting diode structures (10a, 10b) during operation of the light emitting diode array module (30), wherein at least a first light emitting diode structure (10a) of the plurality of light emitting diode structures (10a, 10b) is characterized by a first color, and wherein at least a second light emitting diode structure (10b) of the plurality of light emitting diode structures (10a, 10b) is characterized by a second color different than the first color, wherein the first color, the second color and the optical cross talk between the light emitting diodes are arranged to provide a predefined light distribution in a reference plane (40) perpendicular to an optical axis (50) of the light emitting diode an-ay module (30).

Abstract: An apparatus projecting light onto a projection surface comprises: a substrate having disposed thereon two or more LED clusters and two or more micro-lenses, each LED cluster comprising a plurality of LEDs and each of the micro-lenses being disposed the plurality of LEDs. Each of the LED clusters is arranged to emit light through each of the micro-lenses in a pattern of dots. A center of at least one LED cluster is off-set from an optical center of the micro-lens of its LED cluster. A projected image includes arrangements of individual dots and/or areas of smooth light resulting from the pattern of dots.

Abstract: Systems, methods and devices are for optical imaging are described. A system includes a light source and a light detection unit. The light source includes a light-emitting device and a first spectral filter opposite the light emitting device. The first spectral filter includes at least one dielectric filter and has a first angular dependence of a transmission passband. The light source further includes at least one reflector adjacent side surfaces of the light emitting device. The light detection unit includes an optical sensor and a second spectral filter opposite the optical sensor. The second spatial filter has a second angular dependence of a transmission passband that is matched to the first angular dependence.

Abstract: A light emitting device comprises a plurality of coherent light sources, and a plurality of light scattering structures. Each light scattering structure is located in an optical path for light output from a different corresponding one of the coherent light sources. Each light scattering structure comprises an arrangement of nanoantennas embedded in an electrically responsive material and electrical contacts by which to apply a voltage to the electrically responsive material. Application of a time varying electrical signal causes the refractive index of the electrically responsive material in a light scattering structure to vary and thereby varies light scattering by the nanoantennas in the light scattering structure. This effect may be used to reduce speckle caused by interference of light output by the coherent light sources.

Abstract: The output spectrum of a light emitting device comprising LEDs and/or pcLEDs is tunable by controlling emission from an activating LED to activate absorption by a photochromic material in the light output optical path of the device, or to induce emission from a wavelength converting material not otherwise active during operation of the light emitting device, or to activate absorption by a photochromic material in the light output optical path of the device and to induce emission from a wavelength converting material not otherwise active during operation of the light emitting device.

Abstract: An apparatus projecting light onto a projection surface comprises: a substrate having disposed thereon two or more LED clusters and two or more micro-lenses, each LED cluster comprising a plurality of LEDs and each of the micro-lenses being disposed the plurality of LEDs. Each of the LED clusters is arranged to emit light through each of the micro-lenses in a pattern of dots. A center of at least one LED cluster is off-set from an optical center of the micro-lens of its LED cluster. A projected image includes arrangements of individual dots and/or areas of smooth light resulting from the pattern of dots.

Abstract: The invention refers to a lighting device comprising at least one light emitting diode (LED). The object to provide a lighting device that is capable of providing a light pattern for illuminating an object in 3D imaging, wherein the lighting device is simple and cost-effective to manufacture, while the lighting device may in addition have a very small form factor, is solved in with a lighting device comprising: at least one LED for emitting light towards a light-emitting side; a first grating with a regular pitch having light-blocking sections and light-permeable sections; wherein the first grating is arranged on the light-emitting side to block the passage of light at the light-blocking sections, such that the light passing the light-permeable sections is capable to illuminate an object with a line pattern. The invention further corresponds to a method for producing a lighting device and the use of a lighting device.

Abstract: A lighting system is described that includes a first lighting device, a second lighting device and a pattern element. The first lighting device includes at least one individual light-emitting element configured to emit light with a first beam profile. The second lighting device includes at least one individual light-emitting element configured to emit light with a second beam profile such that a third beam profile, different from the first beam profile and the second beam profile, is provided as a combination of the first beam profile and the second beam profile. The pattern element is configured to generate a pattern on at least one of the first beam profile and the second beam profile and a pattern on the third beam profile.

Abstract: A lighting system is described that includes a first lighting device, a second lighting device and a pattern element. The first lighting device includes at least one individual light-emitting element configured to emit light with a first beam profile. The second lighting device includes at least one individual light-emitting element configured to emit light with a second beam profile such that a third beam profile, different from the first beam profile and the second beam profile, is provided as a combination of the first beam profile and the second beam profile. The pattern element is configured to generate a pattern on at least one of the first beam profile and the second beam profile and a pattern on the third beam profile.

Abstract: A thin plastic light guide is formed to have cavities on one surface and TIR (total internal reflection) structures directly above the cavities. LEDs mounted on a printed circuit board are positioned hi the cavities. The cavity walls are shaped to refract the LED light and direct the LED light toward the TIR structures to most efficiently make use of the TIR structures. The TIR structures may have a cusp or cone shape. The top ceiling of the cavities may be shaped to direct light at the TIR structure so as to leak through the TIR structure and blend the light with light leaking through surrounding portions of the light guide. The LEDs may be distributed only near the edges of the light guide or over the entire back surface of the light guide. A diffuser sheet may be laminated over the light guide to further mix the light.

Abstract: A lighting system is described that includes a first lighting device, a second lighting device and a pattern element. The first lighting device includes at least one individual light-emitting element configured to emit light with a first beam profile. The second lighting device includes at least one individual light-emitting element configured to emit light with a second beam profile such that a third beam profile, different from the first beam profile and the second beam profile, is provided as a combination of the first beam profile and the second beam profile. The pattern element is configured to generate a pattern on at least one of the first beam profile and the second beam profile and a pattern on the third beam profile.

Abstract: The invention describes a method (100) for counterfeit detection using a portable device (1) with installed counterfeit detection application, to a data carrier (30) comprising this counterfeit detection application, to the portable device (1) used in this method and to a cover (50) comprising guiding structures to perform this method comprising the steps of taking multiple overlapping pictures (110) from at least a portion of the object (10) with the camera (2) of the portable device (1) positioned in front of the object (10) during relatively moving (RM) the portable device with respect to and (1) along the object (10); combining (120) all taken pictures to a single combined image of at least the portion of the object (10) with increased resolution by the counterfeit detection application (4) executed on the portable device (1); applying image processing (130) to the combined image by the counterfeit detection application (4) providing an improved image with improved properties compared to the combined imag

Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.

Abstract: A thin plastic light guide is formed to have cavities on one surface and TIR (total internal reflection) structures directly above the cavities. LEDs mounted on a printed circuit board are positioned in the cavities. The cavity walls are shaped to refract the LED light and direct the LED light toward the TIR structures to most efficiently make use of the TIR structures. The TIR structures may have a cusp or cone shape. The top ceiling of the cavities may be shaped to direct light at the TIR structure so as to leak through the TIR structure and blend the light with light leaking through surrounding portions of the light guide. The LEDs may be distributed only near the edges of the light guide or over the entire back surface of the light guide. A diffuser sheet may be laminated over the light guide to further mix the light.

Abstract: A thin plastic light guide is formed to have cavities on one surface and TIR (total internal reflection) structures directly above the cavities. LEDs mounted on a printed circuit board are positioned in the cavities. The cavity walls are shaped to refract the LED light and direct the LED light toward the TIR structures to most efficiently make use of the TIR structures. The TIR structures may have a cusp or cone shape. The top ceiling of the cavities may be shaped to direct light at the TIR structure so as to leak through the TIR structure and blend the light with light leaking through surrounding portions of the light guide. The LEDs may be distributed only near the edges of the light guide or over the entire back surface of the light guide. A diffuser sheet may be laminated over the light guide to further mix the light.

Abstract: Systems, methods and devices are for optical imaging are described. A system includes a light source and a light detection unit. The light source includes a light-emitting device and a first spectral filter opposite the light emitting device. The first spectral filter includes at least one dielectric filter and has a first angular dependence of a transmission passband. The light source further includes at least one reflector adjacent side surfaces of the light emitting device. The light detection unit includes an optical sensor and a second spectral filter opposite the optical sensor. The second spatial filter has a second angular dependence of a transmission passband that is matched to the first angular dependence.

Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.

Abstract: Systems, methods and devices are for optical imaging are described. A system includes a light source and a light detection unit. The light source includes a light-emitting device and a first spectral filter opposite the light emitting device. The first spectral filter includes at least one dielectric filter and has a first angular dependence of a transmission passband. The light source further includes at least one reflector adjacent side surfaces of the light emitting device. The light detection unit includes an optical sensor and a second spectral filter opposite the optical sensor. The second spatial filter has a second angular dependence of a transmission passband that is matched to the first angular dependence.

Abstract: The invention describes a light emitting diode array module (30) comprising a plurality of light emitting diode structures (10a, 10b), wherein the light emitting diode structures (10a, 10b) are arranged such that there is an optical cross talk between the light emitting diode structures (10a, 10b) during operation of the light emitting diode array module (30), wherein at least a first light emitting diode structure (10a) of the plurality of light emitting diode structures (10a, 10b) is characterized by a first color, and wherein at least a second light emitting diode structure (10b) of the plurality of light emitting diode structures (10a, 10b) is characterized by a second color different than the first color, wherein the first color, the second color and the optical cross talk between the light emitting diodes are arranged to provide a predefined light distribution in a reference plane (40) perpendicular to an optical axis (50) of the light emitting diode an-ay module (30).

Abstract: An apparatus projecting light onto a projection surface comprises: a substrate having disposed thereon two or more LED clusters and two or more micro-lenses, each LED cluster comprising a plurality of LEDs and each of the micro-lenses being disposed the plurality of LEDs. Each of the LED clusters is arranged to emit light through each of the micro-lenses in a pattern of dots. A center of at least one LED cluster is off-set from an optical center of the micro-lens of its LED cluster. A projected image includes arrangements of individual dots and/or areas of smooth light resulting from the pattern of dots.