1,720,972 research outputs found
REFLECTIVE ILLUMINATION SYSTEMS FOR OPTICALLY WIDENED PERCEPTION
No full textIn an aspect, an illumination system (100) is disclosed to comprise a light source (102) configured to generate a light beam (103), and a chromatic reflective unit (1) for being illuminated by the light beam (103). The chromatic reflective unit (1) comprises a plurality of non-coplanar reflective surface sections (3'), and a chromatic diffusing layer (5) comprises a plurality of nanoparticles (37) embedded in a matrix (39), wherein the chromatic diffusing layer (5) is provided upstream of the plurality of reflective surface sections (3') such that at least a portion of the light beam (103) passes through the chromatic diffusing layer (5) before and after being reflected by the plurality of non-coplanar reflective surface sections (3'). Chromatic diffusing layer (5) is further configured to provide for - together with non- coplanar reflective surface sections (3') - a specular reflectance that is larger in the red than in the blue and for a diffuse reflectance that is larger in the blue than in the red
SEAT ILLUMINATING SYSTEM
No full textA seat illuminating system (101D) for, in particular sunlight-like, illuminating a target region (144) comprises a seat arrangement (140) having a seat surface (142A). The target region (144) is defined for a person sitting on the seat surface (142 A). The seat illuminating system (101D) comprises further a mounting structure (150 A) being spatially fixed with respect to the seat arrangement (140); a reflector unit (106) mounted at the mounting structure (150 A) and comprising a reflective surface and a luminous layer for homogenously emitting diffuse light at a first color, the luminous layer extending in front of the reflective surface and comprising a visible front area section (110A) of the reflector unit (106). The seat illuminating system (101D) comprises further a light projector (102) mounted at the mounting structure (150A) and configured to generate a light beam (103) adapted in size for comprehensively illuminating the visible front area section (110A) such that at least a portion of the light beam (103) passes through the luminous layer before and after being reflected by the reflective surface, thereby forming an illuminating light beam (103 A) at a second color directed onto the target region (144)
SKY-DOME LIGHTING SYSTEM
No full textA lighting system comprises a chromatic reflective unit (606), and a light source (602), wherein the chromatic reflective unit (606) is shaped as a rotational paraboloid or a portion of a rotational paraboloid, and the light source (602) is positioned close to or at the paraboloid focal position
SUNLIGHT-BASED SUN IMITATING ILLUMINATION
No full textA sunlight-based projector system (3) is disclosed for providing a direct light beam (5). The projector system (3) comprises a sunlight receiving unit (9) with a collector system (13), a plurality of optical fibers (15), and a plurality of fiber output channels (44). The collector system (13) collects natural outdoor light, and couples the collected light into the plurality of optical fibers (15). The projector system (3) comprises further a sunlight forming unit (11) with a plurality of optical collimator units (47) arranged in a two-dimensional array, wherein each optical collimator unit (47) receives the respective fiber output light (45) and comprises at least one optical collimator (49) for reducing the angular distribution width of the received divergent fiber output light (45). Output areas of the plurality of optical collimator units (47) form essentially a continuously extending large light- emitting face (53) of the sunlight forming unit (11) for emitting an essentially collimated light beam (5). The generated direct light beam (5) may be used together with diffused light generating areal units to provide a sun-sky imitating lighting system with a sun-like appearance
LARGE AREA LIGHT SOURCE AND LARGE AREA LUMINAIRE
No full textA light source (25) for emitting collimated light (29) in particular for a large area luminaire (21) comprises a light guide unit (43) optionally comprising a plurality of light guide strips (91) configured for guiding light received at the at least one lateral coupling face (47), for example, by total internal reflection. The light guide strips comprise a plurality of localized light source regions (57) at a main front face (55A) for having light pass there through, wherein the light source regions (57) are provided along the light guide strip (91) within a non-source region (59). The light source (25) further comprising a plurality of light emitting units (41) for emitting light into the light guide strips (91) through respective portions of the at least one coupling face (47), and a collimation unit (45) extending along the main front face (55A) and comprising a plurality of collimating elements. Each collimating element, which may be a compound parabolic concentrator or TIR lens, comprises an input side and an output side, is optically associated to one of the plurality of light source regions (57), and is configured to receive light emerging from the associated light source region (57) at its input side and to emit collimated light (29) from a respective collimated light emitting region (61) formed at its output side. In another embodiment the light emitting units are configured to emit primary light having a spectral distribution that compensates for spectral losses accumulated by the primary light while propagating within the light guide unit. In a further embodiment the collimated light has a direction that is tilted with respect to the normal to a light emitting face of the light source. In an additional embodiment the ration of the area of the plurality of light source regions with respect to the area of the main front face and/or the area of the non-source region is less than or equal to 20%. In a further embodiment a plurality of reflective structures is associated with the light source regions
Erratum: Modeling of Fibrin Gels Based on Confocal Microscopy and Light-Scattering Data (Biophysical Journal (2013) 104(5) (1151–1159)(S0006349513000945)(10.1016/j.bpj.2013.01.024))
No full text(Biophysical Journal 104, 1151–1159; March, 2013) In the original Supporting Material Supplement there was a typographical error in Eq. (S-7a): This was a typographical error and does not affect the results reported on this supplement and in the main article. We thank F. Burla (AMOLF, Amsterdam, The Netherlands) for having brought the error to our attention
MODULAR SUN-SKY-IMITATING LIGHTING SYSTEM
No full textA lighting system (100A, 100B) comprises a light source (102) for emitting a light beam stripe (220B) with a plurality of light emitting units (603, 803 A, 803B) forming an array in the longitudinal direction (X), and an optical element (870) at the exit side of the light source (102) extending across the plurality of light emitting units, and configured to enlarge the beam divergence in the transversal direction. The lighting system (100A, 100B) further comprises a reflector unit, a support structure (210), and a reflective surface (104) with an essentially linear shape in the longitudinal direction (X) and a curved shape in the longitudinal transverse direction (Y), and a chromatic diffusing layer (108) comprising a plurality of nanoparticles embedded in a matrix, wherein the chromatic diffusing layer (108) is positioned such that at least a portion of the reflected light beam (220A) passes through the chromatic diffusing layer (108), thereby generating diffuse light by scattering more efficiently the short-wavelengths components of the light in the visible spectral range than the long-wavelength components of the light in the visible spectral range
COMBINED SYSTEM FOR SUN-SKY IMITATING ILLUMINATION
No full textIn an aspect, a combined system (300) comprises a sun-sky imitating device (310) that is configured as an artificial illumination device (20) for generating light with a luminance profile and an appearance, which feature a directed-light component (314) and a first diffused-light component (316) that are emitted from a sun-sky imitating output area (312) for imitating the natural light from the sun and the sky, respectively, and the sun-sky imitating output area (312) has a transversal dimension (D310) of at least 7 cm, wherein the transversal dimension as the longest line segment joining two points of a perimeter of the sun- sky imitating output area (312). Moreover, the combined system (300) comprises a sky imitating device (320) that is configured as an additional diffused- light emitter to emit a second diffused-light component (326) from a sky imitating output area (322) for imitating the natural light from the sky only
SUNLIGHT-BASED LARGE AREA LIGHT SOURCE AND LARGE AREA LUMINAIRE
No full textA light source (25) for emitting collimated light (29) in particular for a large area luminaire (21) comprises a light guide unit (43) for guiding light by total internal reflection. The light guide unit comprises a plurality of localized light source regions (57) at a main front face (55A) for having light pass there through. The light source (25) further comprises a plurality of light emitting units (41) for emitting light into the light guide strips (91) through respective portions of the at least one coupling face (47) of the light guide unit (43), and a collimation unit (45) extending along the main front face (55A) and comprising a plurality of collimating elements. At least one light emitting unit (41) is configured as a light input coupling assembly (250) to receive collected natural light from a fiber (249) and to provide the received natural light to the light guide unit (43). The light source (25) can be implemented in a sunlight-based illumination system (241) collecting and providing natural light to the light source (25)
LIGHTING SYSTEM WITH APPEARANCE AFFECTING OPTICAL SYSTEM
No full textIn an aspect, a lighting system (1) comprises a lighting unit (11) with a light source (31) and a dichroic light exiting surface (15), wherein the lighting unit (11) is configured for emitting dichroic light from the dichroic light exiting surface (15). The emitted dichroic light includes a directional light portion (37) of direct light (17) and a diffused light portion (39) of diffused light (19) with a another larger correlated color temperature. The lighting system further comprises an appearance affecting optical system (13) with a plurality of structural elements (40, 91, 93, 101, 105) that comprise surfaces that delimit a plurality of diffused light passages (14, 103, 107), and comprise direct light illuminated surface regions (25), which are subject to the illumination with direct light (17) from respectively associated affected direct light providing areas (81) of the dichroic light exiting surface (15). Moreover, the affected direct light providing areas (81) cover at least 70% of the dichroic light exiting surface (15), and the direct light (17) from at least one affected direct light providing area (81) and diffused light (19) propagate within at least one of the diffused light passages (14, 103, 107)
- …
