摘要:
Techniques of providing illumination to a head-mounted display (HMD) involve providing off-board illumination apart from the HMD. An off-board illumination unit delivers the illumination to the HMD via optical fibers. The optical fibers are lightweight and do not restrict motion of a user. Because the power source is less restricted, the off-board illumination unit provides flexibility in the hardware used to generate the illumination. For example, the illumination unit may use red, green, and blue narrow-band diode lasers. Further, by controlling modes in the fiber and providing additional light-guiding hardware, the angles at which light strikes LCD pixels may be largely restricted to certain specified angles. Restricted angles of incidence enable the use of fast-switching liquid crystals without degrading the image quality. Such a restriction allows for high-resolution imaging using rapid switching of the liquid crystal which enables very low latencies.
摘要:
According to embodiments of the present invention, a lighting apparatus is provided. The lighting apparatus includes a light guiding arrangement, a light collection arrangement adapted to collect sunlight, the light guiding arrangement being optically coupled to the light collection arrangement to receive at least a portion of the sunlight collected for propagation through the light guiding arrangement, and a light source arrangement configured to generate an illumination light, the light guiding arrangement being optically coupled to the light source arrangement to receive at least a portion of the illumination light for propagation through the light guiding arrangement. According to further embodiments of the present invention, methods of forming a lighting apparatus are also provided.
摘要:
In one aspect, a light module is disclosed, which includes a housing providing a hollow chamber extending from a proximal end to a distal end, and a lens positioned in the hollow chamber, where the lens has a lens body comprising an input surface for receiving light from a light source and an output surface through which light exits the lens body, said lens further comprising a collar at least partially encircling said lens body. The light module further includes at least one shoulder on which the lens collar can be seated for positioning the lens within the housing. A light source, e.g., an LED, is coupled to the hollow chamber, e.g., at its proximal end, for providing light to the lens. In some embodiments, an optical window is disposed in the hollow chamber and is optically coupled to the output surface of the lens such that the light exiting the lens passes through the optical window before exiting the light module. In some embodiments, the shoulder can be formed as part of the housing. In other embodiments, the shoulder can be provided by a sleeve disposed in the module's housing.
摘要:
Die Erfindung betrifft eine indirekte Beleuchtungsanordnung (2, 2.1, 2.2, 2.3, 2.4, 2.5), umfassend mindestens einen zylinderförmigen Lichtleiter (4), wobei mindestens ein Ende (12.1, 12.2) des zylinderförmigen Lichtleiters (4) eingerichtet ist, Licht von einer ersten Lichtquelle (1) in den zylinderförmigen Lichtleiter (4) einzukoppeln, und die Mantelfläche (10) des zylinderförmigen Lichtleiters (4) einen Kopplungsabschnitt (6) eingerichtet zum optischen Koppeln des zylinderförmigen Lichtleiter (4) mit einem anordnenbaren plattenförmigen Lichtleiter (16) aufweist, wobei zumindest der Kopplungsabschnitt (6) mindestens ein holographisch-optisches Element (8) eingerichtet zum Emittieren von Licht aus dem zylinderförmigen Lichtleiter (4) in den anordnenbaren plattenförmigen Lichtleiter (16) aufweist.
摘要:
A light emitting device (1) comprising a first light source (21) and a second light source (22), a luminescent element (4) comprising a first light input surface (41), a second light input surface (42), a light exit surface (43), a first further surface (44) and a second further surface (45), a first cooling assembly (5) and a second cooling assembly (6), the first cooling assembly (5) comprising a first cooling element (52) and a first light source board (51) on which one of the light sources is mounted, and the second cooling assembly (6) comprising a second cooling element (62) and a second light source board (61), on which the other one of the light sources is mounted, and the second cooling assembly (6) being arranged with a surface (621) in mechanical and thermal contact with the first further surface (44) of the luminescent element thereby forming a first interface and the first cooling assembly (5) being arranged with a surface (521) in mechanical and thermal contact with the second further surface (45) of the luminescent element thereby forming a second interface, the first interface and the second interface comprising a flatness of less than 10 µm, and the root mean squared surface roughness, R RMS , of the first further surface (44) and the second further surface (45) of the luminescent element being comprised in the interval 1 µm RMS
摘要:
In accordance with one embodiment, a method of growing one or more plants can be implemented wherein the one or more plants establish a canopy that shades an intra-canopy volume of the one or more plants from direct illumination. The method can include coupling a light source with a light distribution device; disposing the light distribution device in a position to directly illuminate the canopy region of the one or more plants and to directly illuminate the intra-canopy volume of the one or more plants.
摘要:
Dans un projecteur comportant une source de lumière ayant au moins des première (22), deuxième (24) et troisième (26) matrices de diodes délivrant respectivement au moins des premier (CL1), deuxième (CL2) et troisième (CL3) conduits de lumière séparés de longueurs d'ondes et dimensions déterminées, il est prévu une première lame dichroïque (60) formant un premier conduit de lumière combinée (CLC1) à partir desdits premier et deuxième conduits de lumière, une deuxième lame dichroïque (62) formant un second conduit de lumière combinée (CLC2) à partir dudit premier conduit de lumière combinée et dudit troisième conduit de lumière, et un miroir parabolique hors axe (54) pour recevoir le second conduit de lumière combinée (CLC2) et le focaliser en un point focal déterminé apte à former un point d'entrée pour une unique fibre optique (30).
摘要:
The invention provides a lighting device (1) comprising a plurality of solid state light sources (10) and an elongated ceramic body (100) having a first face (141) and a second face (142) defining a length (L) of the elongated ceramic body (100), the elongated ceramic 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), wherein the plurality of solid state light sources (10) are configured to provide blue light source light (11) to the one or more radiation input faces (111) and are configured to provide to at least one of the radiation input faces (111) a photon flux of at least 1.0* 10 17 photons/(s.mm 2 ), wherein the elongated ceramic body (100) comprises a ceramic material (120) configured to wavelength convert at least part of the blue light source light (11) into at least converter light (101, wherein the ceramic material (120) comprises an A 3 B 5 O 12 :Ce 3 + ceramic material, wherein A comprises one or more of yttrium (Y), gadolinium (Gd) and lutetium (Lu), and wherein B comprises aluminum (Al).