Abstract: A photo acoustic sample detector (10) is provided for detecting a concentration of sample molecules in a sample mixture (1). The photo acoustic sample detector (10) comprises an input for receiving the sample mixture (1), an acoustic cavity (3) for containing the sample mixture (1), a light source (5) for sending light (50) into the acoustic cavity (3) for exciting the sample molecules and thereby causing sound waves in the acoustic cavity (3) and a pick up element (4) for converting the sound waves into electrical signals (12). The photo acoustic sample detector (10) also comprises a light guide (2) comprising a transparent inner wall (8) at an interface of the light guide (2) and the acoustic cavity (3) and a reflective outer wall (7) at an outside of the light guide (2). The light source (5) is arranged for illuminating the light guide (2). The light guide (2) serves for reflecting the light (50) back and forth through the light guide (2) and the acoustic cavity (3).

Abstract: Proposed is a luminaire (1), comprising light sources (10) and optical elements (20). The light sources (10) are arranged in a first (11) and a second array (12), while the optical elements (20) are arranged in a first (21) and a second section (22). The first ‘light sources’ array (11) and the first Optical element’ section (21) form a first group (31), and the second array (12) and the section (22) form a second group (32). The luminaire (1) is characterized in that the optical elements (20) of each group are arranged to have different beam shaping characteristics, and the arrays (11,12) are arranged to be individually addressable. This is especially advantageous in illumination applications where the control of the beam shape is required or desired. Advantageously, the invention provides a luminaire (1) capable of adjusting the beam shape without using an adjustable optical system. Moreover, the control bandwidth of the light sources limits the speed with which the beam shape can be adjusted.

Abstract: The present invention relates to an illumination system (200) including a first sub-system (205) comprising a first set (201) of at least two differently colored light sources where the first set (201) has a first spectral distribution, and a first light mixing device (203) arranged in a direction of emission of light from the first set of light sources and configured to mix light emitted by the first set of light sources. The illumination system further includes a second sub-system (206) comprising a second set (202) of at least two light sources where the second (202) set has a second spectral distribution, and a second light mixing device (204), also arranged in a direction of emission of light from the second set of light sources and configured to mix light emitted by the second set of light sources.

Abstract: A lighting structure comprises a light generation assembly comprising a light source for generating light. In order to meet desired lighting requirements, the lighting structure further comprises a substantially plate-shaped light guiding structure. The light guiding structure is provided with a light assembly recess and a light emission structure. The light generation assembly is arranged in the light assembly recess of the light guiding structure such that light emitted by the light generation assembly enters and propagates in the light guiding structure. The light emission structure is arranged for emitting the propagating light from the light guiding structure.

Abstract: The present invention relates to a lighting device (10) comprising a tiled light guide (16) comprising a central tile (12b) and at least one end tile (12a, 12c), the end tile(s) (12a, 12c) being arranged at an edge (24, 26) of the light guide (16); at least one solid state light source (18) arranged for coupling light into the light guide (16) in a general direction towards or away from the end tile(s) (12a, 12c); and a plurality of out-coupling structures (20) arranged for coupling light out of the light guide (16); wherein the end tile(s) (12a, 12c) has inherent in-coupling and/or inherent out-coupling of light different from the central tile (12b).

Abstract: A luminaire comprises a light guiding layer (2) and a plurality of LEDs (7), which LEDs (7) are accommodated in at least one hole (10) arranged in the light guiding layer (2), for emitting light into the light guiding layer (2). The light guiding layer (2) further comprises at least one out-coupling structure (5; 6), for coupling the light out of the light guiding layer (2).

Abstract: The present invention relates to lighting device (10). The lighting device comprises a light guide plate (12), and at least one array of light emitting diodes (LEDs) (14), which LEDs are accommodated in holes arranged in the light guide plate, wherein each hole has: at least two side facets (18) through which light from the LEDs is to be laterally coupled into the light guide plate, and at least one corner (20) formed by two converging side facets of the at least two side facets. This promotes TIR at adjacent light sources and therefore diminishes losses due to absorption or scattering at adjacent holes.

Abstract: A luminaire arrangement for providing a luminous flux in a target direction (z) comprising a light guide (101), multiple light sources (103) arranged at said light guide for emitting light into said light guide, out coupling means (106) arranged at said light guide and adapted to direct light out from said light guide; and a cover layer (102) arranged in front of said light guide at the side where light it to be directed out, said cover layer being provided with at least one optically transparent area (104) such that light directed out from said light guide is allowed to pass said cover layer. The cover layer allows for use of the same or similar light guide, light sources and out coupling means in a number of different luminaire applications, where each application may have different requirements on e.g. appearance, and/or collimation and/or directivity of the luminous flux.

Abstract: An autostereoscopic display device includes a device configured to provide collimated light and a dynamic beam deflector which is configured to scan a beam. The exit angle of the light emitted by pixels of the display array transmitted through a splitting screen is controlled and scanned by the dynamic beam deflector.

Abstract: The present invention relates to a light emitting diode (LED) lighting device (10). The lighting device comprises a light guide plate (12), and a plurality of LEDs (16) accommodated in holes (14) arranged in the plane of the light guide. At least one hole has a first side facet (18) for coupling light from any LED in the hole into the light guide and a second opposite side facet (20) for coupling light out of the light guide. Further, the holes are arranged such that all first side facets are facing one direction. Such an LED based lighting device can be made thin and unobtrusive.

Abstract: The illumination system has an array of light sources (1, 1?, . . . ) such as an array of light emitting diodes arranged in a pre-determined manner in a first plane (11), wherein dsource is a characteristic dimension of the spatial arrangement of the light sources in the first plane. An array of associated lenses (2, 2?, . . . ) is arranged in substantially the same pre-determined manner in a second plane (12). Each lens has substantially the same focal distance flens. The array of lenses is provided at a plane distance dplane from the array of light sources. The plane distance dplane is substantially equal to the focal distance flens of the lenses. The illumination system has displacement means for displacing the array of lenses with respect to the array of light sources so as to obtain a plurality of directional light beams projecting spots on a projection plane arranged at a projection distance dprojection from the illumination system, wherein dprojection?10×dsource and dprojection?10×dplane.

Abstract: An optical arrangement comprising a light guide (101) having a light-entry portion (103) with a light-entry surface (105), a tapering portion (107) with a light reflecting surface, and a light-exit surface (109). The light-entry portion (103) is arranged to guide light from the light-entry surface (105) in a first direction (x) towards the light reflecting surface (H I), the light reflecting surface being arranged in relation to the first direction (x) so that incident light from the light-entry portion (103) is reflected towards the light-exit surface (109). A light transmitting layer (113) is adapted to transmit light diffusively and arranged to cover at least a portion of the light-entry edge surface (105) of the light guide (101). The arrangement is e.g. suitable for use in a LED based luminaire and allows for efficiency and forming of a light beam able to fulfill glare requirements. The arrangement may advantageously be used in a downlighting application.

Abstract: A light guide (11; 101; 111) comprising first and second oppositely arranged faces, an in-coupling portion (13a-f) for in-coupling of light from a light-source (12a-f; 95a-f; 102; 106a-c; 112a-f), and an out-coupling portion (15a-f; 103; 113a-f) located adjacent to the in-coupling portion (13a-f). The out-coupling portion (15a-f; 103; 113a-f) is configured to out-couple a primary light beam having a direction of propagation directed from a position in the in-coupling portion (13a-f) with a lower out-coupling efficiency than a secondary light beam having a direction of propagation directed from a position in the light guide (11; 101; 111) outside the in-coupling portion (13a-f). In this manner, a good mixing of light in the light guide can be achieved without imposing any particular requirements on the collimation of the in-coupled light.

Abstract: An optical separating filter separates impinging light into a first and a second part having different properties. The separating filter comprises reflective filters (FR) arranged in funnel shaped structures (F1). Each one of the structures (F1) have an inlet area (IA1) to receive the impinging light (IL) and an outlet area (OA1) smaller than the inlet area. (IA1) to converge reflected impinging light (RL) towards the outlet area (OA1). The structures (F1) comprise a first group of funnel shaped structures (F1) constructed to reflect light which has a first property (C1) towards their respective first outlet areas (OA1) and for transmitting light which has a second property (C2) towards respective second outlet areas (OA2).

Abstract: A window assembly (100,110,120,130) for irradiating infrared light (L) comprises a light guide (5) for infrared light (L), which is formed by a gap between a first transparent substrate (2), having an exterior surface and an interior surface, which faces the light guide (5), and a second transparent substrate (3) substantially parallel to the first transparent substrate (2) and having an exterior surface and an interior surface, which faces the light guide (5) and the interior surface of the first transparent substrate (3). A first and a second reflective layer (12,13), that are both substantially reflective for infrared light (L), extend over the interior surfaces of respectively the first and the second transparent substrate (2,3). The second reflective layer (13) is provided with an opening (21) through which at least part of the infrared light (L) exits the light guide (5).

Abstract: An autostereoscopic display device uses a converged backlight output, and the convergence is performed with a light converging arrangements (60,62) which preferentially converge light inwardly along a certain axis perpendicular to the elongate axis of the lenticular elements (11). This means that the amount of light directed at large angles sideways between the lenticular elements (11) is reduced to a minimum. This reduces the amount of light tunneling within the lenticular array and therefore improves the display output, in particular the brightness and contrast.

Abstract: This invention relates to a composite light source (101) for generating light of a predetermined colour. The light source has a plurality of sub-modules (102-104), which are each able to generate light of that predetermined colour Each sub-module has a light collimating and mixing structure (102-104) and a light unit group (105-107) consisting of a plurality of coloured light units (109a-109c), which are arranged at an entrance (102a-104a) of the collimating and mixing structure. In order to obtain a homogenizing interaction of the light emitted from the light unit groups, looking at a given light unit position in different light unit groups, light units of different colors are mounted in that position.

Abstract: A light-emitting device, comprising at least a first light source (101) and a second light source (102) is provided. The light source further comprises a first collimating means (111) for collimating light from the first light-source and a second collimating means (112) for collimating light from said second light source wherein the output areas of the collimating means at least partly overlaps. A light guiding means (107) is arranged between said light sources and said collimating means for guiding light from the first light source to the first light collimating means, and from the second light source to the second collimating means. A light-emitting device of the present invention can provide well mixed and collimated light even though there is a distance between the light sources and the collimating means.

Abstract: The present invention relates to an illumination system (10, 50) for a projection display device. The system comprises an integrator arrangement (14, 58) having at least one entrance aperture (16, 64), a light source (24, 54), and means (26, 56, 61) for directing light from the light source towards the at least one entrance aperture. The illumination system is characterized by a retro-reflector (34, 66) being arranged directly adjacent to said at least one entrance aperture. One advantage offered by the invention is that the efficiency of use of lumen output from the light source is increased. The invention also relates to a projection display device (80) comprising such illumination system.

Abstract: A display unit comprising electro-wetting pixels (1300) is provided. The inventive pixels (1300) provide bistable or multi-stable pixel states and thus facilitates passive matrix addressing. For this purpose an additional electrode (1305) is arranged for each multi-stable state. Consequently, each pixel comprises one counter electrode (1306) and at least one pair of address and retain electrodes (1304, 1305). In order to activate a pixel, an address potential is applied to the address and retain electrodes (1304, 1305) in relation to the counter electrode (1306), and in order to deactivate a pixel the potential is removed. In order to retain a current pixel state a retain potential is applied to only the retain electrode (1305) in relation to the counter electrode (1306); the current pixel state, be it active or passive, will then be preserved and the retain potential configuration thus provides a bistable pixel state.