Abstract: A lighting device comprises a base (7), a light aggregate (3), and a lens member (1) covering the light aggregate (3). The base (7) and the lens member (1) comprise mounting holes (27, 25), the mounting holes (25) of the lens member (1) being positioned along the periphery (1A) of the lens member (1). Mounting holes (25, 27) of the lens member (1) and the base (7) are aligned, and mounting elements (11A, 11B) are extending and fixed in said mounting holes (25, 27) thereby fixing the lens member (1) to the base (7). Each of the mounting elements (11A, 11B) at least along half of the periphery (1A) of the lens member (1) are yielding elements relative to the base (7) and the lens member (1). The mounting elements (11A, 11B) have a lower Young's modulus than the base (7) and the lens member (1).

Abstract: The invention provides a lighting device (1) comprising: —a luminescent concentrator (5) comprising an elongated light transmissive body (100) having a first face (141) and a second face (142) defining a length (L) of the light transmissive body (100), the light transmissive body (100) comprising one or more radiation input faces (111) and a radiation exit window (112), wherein the second face (142) comprises said radiation exit window (112); the elongated light transmissive body (100) comprising a luminescent material (120) configured to convert at least part of light source light (11) received at one or more radiation input faces (111) into luminescent material light (8), and the luminescent concentrator (5) configured to couple at least part of the luminescent material light (8) out at the radiation exit window (112) as converter light (101); —a light source mirror unit (200) comprising: —a plurality of light sources (10) configured to provide said light source light (11) in a direction of a curved mirror

Abstract: The present invention relates to light emitting module, comprising: a mixing chamber (10) arranged to mix light, the mixing chamber (10) comprising a base (12) having a highly reflective inner surface, a circumferential side wall (14) having a highly reflective inner surface, and a semi-reflective light exit window (16); and at least one light emitting diode (5) arranged on the inner surface of the circumferential side wall (14) such that light emitted from the at least one light emitting diode (5) is emitted into the mixing chamber (10) for mixing of the emitted light within the mixing chamber (10), wherein the semi-reflective light exit window (16) is arranged to couple out light emitted from the at least one light emitting diode (5) and mixed within the mixing chamber (10), wherein the aspect ratio of a width (W) and a height (H) of the mixing chamber (10) is in the range of 1 to 8, wherein the reflectivity of the semi-reflective light exit window (16) is in the range from 30% to 80% for light emitted from

Abstract: A light emitting device (1) comprising at least one light source (2) adapted for, in operation, emitting first light (13) with a first spectral distribution, a light guide (4) made of a luminescent material and comprising a light input surface (41) and a light exit surface (42) extending in an angle different from zero to one another, the light guide further comprising a first further surface (46) extending parallel to and arranged opposite to the light exit surface, wherein the light guide is adapted for receiving the first light (13) with the first spectral distribution at the light input surface, converting at least a part of the first light with the first spectral distribution to second light (14) with a second spectral distribution, guiding the second light with the second spectral distribution to the light exit surface and coupling the second light with the second spectral distribution out of the light exit surface.

Abstract: A light emitting device (1) comprising at least one light source (2) adapted for, in operation, emitting first light (13) with a first spectral distribution, a light guide (4) made of a luminescent material and comprising a light input surface (41) and a light exit surface (42) extending in an angle different from zero to one another, the light guide further comprising a first further surface (46) extending parallel to and arranged opposite to the light exit surface, wherein the light guide is adapted for receiving the first light (13) with the first spectral distribution at the light input surface, converting at least a part of the first light with the first spectral distribution to second light (14) with a second spectral distribution, guiding the second light with the second spectral distribution to the light exit surface and coupling the second light with the second spectral distribution out of the light exit surface.

Abstract: The present invention relates to light emitting module, comprising: a mixing chamber (10) arranged to mix light, the mixing chamber (10) comprising a base (12) having a highly reflective inner surface, a circumferential side wall (14) having a highly reflective inner surface, and a semi-reflective light exit window (16); and at least one light emitting diode (5) arranged on the inner surface of the circumferential side wall (14) such that light emitted from the at least one light emitting diode (5) is emitted into the mixing chamber (10) for mixing of the emitted light within the mixing chamber (10), wherein the semi-reflective light exit window (16) is arranged to couple out light emitted from the at least one light emitting diode (5) and mixed within the mixing chamber (10), wherein the aspect ratio of a width (W) and a height (H) of the mixing chamber (10) is in the range of 1 to 8, wherein the reflectivity of the semi-reflective light exit window (16) is in the range from 30% to 80% for light emitted from

Abstract: There is provided an optical element for use with a LED wherein a base face is arranged to receive incoming light from the LED. The optical element comprises a top face having a pattern of optical structures which refract light away from an optical axis (A) of the optical element. Further the optical element comprises a plurality of side faces extending between the top face and the base face and arranged to refract light from the light towards the optical axis (A). the top face extends such that it covers a first angular range relative to the optical axis (A). The first angular range is an angular range outside which light emitted by the LED would be subject to total internal reflection at an imaginary extension of the top face.

Abstract: A light-emitting arrangement (100) comprising a reflective member (101) having a reflective surface (102) on which at least one LED is arranged is disclosed. A wavelength converting member (104) comprising a first wavelength converting material, adapted to convert light of a first wavelength into light of a second wavelength, is arranged on the reflective member. The converting member has a top face (105) oriented parallel to the reflective surface, and has a first side face (106) and a second side face (107) that are each arranged between the top face and the reflective member on a respective side of the LED(s). The top face is arranged at a vertical distance (V1) from a light-emitting surface (108) of the LED(s). In addition, the reflectivity of the first side face is different from the reflectivity of the second side face.

Abstract: The present invention relates to an optical device (229) for forming a light beam, which optical device comprises a lens (330) having a top section (331) configured to receive light emitted by a light source (220), a bottom section (332) configured to allow the received light to exit the lens, and a plurality of side sections (333) stretching from the top section to the bottom section. The plurality of side sections enclose the lens and are adapted to reflect and refract incident rays of the received light. A cross-section (334) of the lens, in a plane perpendicular to a center axis (338) stretching from the top section to the bottom section, has the shape of a polygon, which polygon is oriented in a length-wise direction (335) and in a transversal direction (336) being perpendicular to each other. Furthermore, the lens is adapted such that the received light exits the lens as a light beam formed to an elongated shape (5) at a predetermined distance (4) from the optical device.

Abstract: A light-emitting arrangement (100) comprising a reflective member (101) having a reflective surface (102) on which at least one LED is arranged is disclosed. A wavelength converting member (104) comprising a first wavelength converting material, adapted to convert light of a first wavelength into light of a second wavelength, is arranged on the reflective member. The converting member has a top face (105) oriented parallel to the reflective surface, and has a first side face (106) and a second side face (107) that are each arranged between the top face and the reflective member on a respective side of the LED(s). The top face is arranged at a vertical distance (V1) from a light-emitting surface (108) of the LED(s). By adapting the properties, dimensions and/or orientation of the faces of the wavelength converting member according to the invention, a desirable light distribution from the light-emitting arrangement is achieved.

Abstract: There is provided an optical element (100) for use with a LED (102) wherein a base face (103) is arranged to receive incoming light from the LED (102). The optical element (100) comprises a top face (104) having a pattern (108) of optical structures (110) which refract light away from an optical axis (A) of the optical element (100). Further the optical element (100) comprises a plurality of side faces (106) extending between the top face (104) and the base face (103) and arranged to refract light from the light towards the optical axis (A). In order to avoid total internal reflection at the top face (104), the top face (104) extends such that it covers a first angular range relative to the optical axis (A). The first angular range is an angular range outside which light emitted by the LED (102) would be subject to total internal reflection at an imaginary extension of the top face.

Abstract: A light-emitting arrangement (100) comprises: a reflective member (101) having a reflective surface (102); at least one light-emitting diode (103) arranged on the reflective surface of the reflective member, the at least one light-emitting diode being adapted to emit light of a first wavelength; and a wave length converting member (104) comprising a first wavelength converting material adapted to convert light of the first wavelength into light of a second wavelength. The wavelength converting member is arranged on the reflective member and having a top face (105)oriented parallel to the reflective surface of the reflective member, and having a first side face (106) and a second side face (107)each arranged between the top face and the reflective member on a respective side of the at least one light-emitting diode, and wherein the top face is arranged at a vertical distance (V1) from a light-emitting surface (108) of the at least one light-emitting diode.

Abstract: The present invention relates to an optical device (229) for forming a light beam, which optical device comprises a lens (330) having a top section (331) configured to receive light emitted by a light source (220), a bottom section (332) configured to allow the received light to exit the lens, and a plurality of side sections (333) stretching from the top section to the bottom section. The plurality of side sections enclose the lens and are adapted to reflect and refract incident rays of the received light. A cross-section (334) of the lens, in a plane perpendicular to a centre axis (338) stretching from the top section to the bottom section, has the shape of a polygon, which polygon is oriented in a length-wise direction (335) and in a transversal direction (336) being perpendicular to each other. Furthermore, the lens is adapted such that the received light exits the lens as a light beam formed to an elongated shape (5) at a predetermined distance (4) from the optical device.

Abstract: The invention relates to an illumination system(100), a high-pressure discharge lamp (90) and an image projection system. The illumination system comprises a high-pressure discharge lamp and a back reflector (30) reflecting the light emitted by the high-pressure discharge lamp towards a light exit window (50). The back reflector comprises an optical axis (55). The high-pressure discharge lamp comprises a discharge vessel (90) comprising two electrodes (98, 99) between which, during operation, a discharge arc is produced. The discharge vessel comprises a first part (10) arranged at least partially between the discharge arc and the back reflector, and a second part (20) arranged at least partially between the discharge arc and the light exit window. The second part has a different shape compared to the first part, thereby forming a refractive element in the second part for reducing an angular distribution at the light exit window of the light emitted from the discharge arc and refracted By the second part.

Abstract: The focus of an optical system (20) can be determined in a reliable and accurate way by arranging a first and second test object (62,64) having a periodic structure at different sides of the focal plane (66) of the optical system and determining the difference in modulation depth of the images formed on different areas (32,34) of a radiation-sensitive detection system (30).

Abstract: The focus of an optical system (20) can be determined in a reliable and accurate way by arranging a first and second test object (62,64) having a periodic structure at different sides of the focal plane (66) of the optical system and determining the difference in modulation depth of the images formed on different areas (32,34) of a radiation-sensitive detection system (30).