摘要:
It is presented a light guide (1) having a polygonal shape with a plurality of sides (5), each side (5) connected by two corners (5). At least one of the corners is an in-coupling corner (4) for in-coupling of light into the light guide (1). At least one of the sides (5) has is slanting and collimates light in-coupled from an adjacent light in-coupling corner (4). The slanting side (5) can also reflect light towards a planar light emitting surface (3) for out-coupling of light therethrough. The light in-coupled in a light in-coupling corner (4) is collimated as if the light guide (1) is an equilateral triangle (2) having three slanting sides.
摘要:
A lighting element (100), a lighting system and a luminaire are provided. The lighting element (100) is used for obtaining a skylight appearance and comprises a white light emitting means (104) for emitting white light, a blue light emitting means 106 for emitting blue light and a Fresnel lens (102). The Fresnel lens (102) is arranged to receive light from the white light emitting means (104) and from the blue light emitting means (106). The white light emitting means (104) is arranged in a first relative position with respect to the Fresnel lens (102) to collimate at least a part of the light emitted by the white light emitting means (104) to obtain a collimated directed light beam in a specific direction. The blue light emitting means (106) is arranged in a second relative position with respect to the Fresnel lens (102) to obtain a blue light emission at least outside the collimated directed light beam.
摘要:
The invention relates to a light-emitting device (1) comprising: a light source (2) for emitting light of a first wavelength range; a light guide (3) having a light receiving surface (4) for receiving at least part of said light emitted by the light source (2), a front surface (31) and a rear surface (32), for guiding light of said first wavelength range by total internal reflection at said front surface and said rear surface; a plurality of outcoupling elements (5) for outcoupling light from the light guide such that at least part of the light that is outcoupled by the outcoupling elements exits the light guide through said rear surface; a reflective member (6) arranged in rear of said light guide to reflect light that is outcoupled from the light guide; and a wavelength converting member (8) comprising a wavelength converting material arranged outside the light guide to convert light of said first wavelength range to light of a second wavelength range. Advantageously, in the light-emitting device according to the invention, the color, color temperature and/or color rendering index may be tuned by modifying the wavelength converting member. As a result, white light which is perceived as warm may be obtained.
摘要:
An optical element, a lighting system and a luminaire is provided. The optical element comprises a plate 100 and a plurality of collimating means. The optical element is to be used in front of a light source comprising a light emitting surface 106, and the optical element is configured to obtain a skylight appearance. The plate 100 is to be arranged parallel to the light emitting surface 106. The plate 100 is opaque and comprises a plurality of holes 104. The plate 100 further comprises a reflective surface 102 which is to be arranged parallel to the light emitting surface 106. The reflective surface 102 is light reflective in a predetermined spectral range to obtain a blue light emission 100. The plurality of collimating means collimate a part of the light received from the light source to obtain a collimated light beam 112 in a specific direction. Each one of the collimating means comprises one of the plurality of holes of the plate 104.
摘要:
A lighting system for providing a daylight appearance and a luminaire are provided. The lighting system comprises a plurality of light emitters and a plurality of optical elements. Said plurality of light emitters emit a wide light beam. Each optical element of at least a subset of the plurality of optical elements is related to a light emitter of the plurality of light emitters, thereby forming a pair. For each pair it applies that if a light emitter of a pair is arranged in a first relative position with respect to the optical element of said pair, the light emitter and the optical element are configured to emit the wide light beam, and if the light emitter of the pair is arranged in a second relative position with respect to the optical element of said pair, the optical element is configured to collimate a portion of the wide light beam to obtain a collimated light beam, and the optical element is configured to absorb another portion of light of the wide light beam in a predefined spectral range to obtain a blue light emission at light emission angles at least outside the collimated light beam.
摘要:
A lighting system is presented. The lighting system comprises a light guide (3), a lighting source (5) arranged for coupling light into the light guide (3), wherein the light guide (3) is arranged such that at least part of the light is emitted in a first general direction (21, 121), and at least part of the light is emitted in a second general direction (23, 123) different to the first direction (21, 121).