Abstract:
A method of rapid (Fig. 14A) prototyping a lighting system (Fig. 11) which is at least one of folded path (Fig. 18) and multifaceted (Fig. 19) includes determining output power of the lighting system by calculating phase space density (Fig. 7).
Abstract:
Improved methods for generating diffuser masters having randomly distributed speckle pattern which are suitable for making seamless light diffusers in various sizes at a low cost. The methods use an incoherent light source (26) which is passed through optical element (29) and used to expose a photoresist (24) coated on a suitable substrate (25) through a mask pattern (23).
Abstract:
A method of rapid prototyping a lighting system which is at least one of folded path and multifaceted includes determining output power of the lighting system by calculating phase space density. A method of rapid prototyping a lighting system comprises ray tracing the lighting system, determining photometric quantities which describe the lighting system based on the ray tracing step, and providing a stereoscopic three-dimensional rendering of the lighting system based on the determining step. Advantageously, three-dimensional renderings promotes rapid prototyping by revealing any hidden pseudo-image artifacts in a lighting system before the lighting system is actually fabricated. A computer system for rapid prototyping a lighting system comprises a plurality of slave processors networked to a host processor. The slave processor and the master processor cooperate to ray trace the lighting system, and the slave processors perform substantially homogeneous independent tasks. Advantageously, the computer architecture allows the homogeneous independent tasks to be distributed to the plurality of slave computers, so that the overall amount of time required to perform the tasks is drastically reduced. Again, this promotes rapide prototyping by decreasing the amount of computational time required to generate useful information about a prototype lighting system.
Abstract:
A non-scattering light pipe (10) includes a transition surface (28, 30) between a first side wall (14) and an input suface (12) and a second side wa ll (16) and the input surface (12). The transition surface is arranged to substantially obscure the corner interfaces (36, 38) between the first and second side walls and the input surface such that in the corner formation an y imperfections therein are not imaged into the output. Most preferably, the transition surface is optimized to provide a substantially uniform light intensity distribution. A light pipe in accordance with the preferred embodiments of the present invention is further arranged to couple a linear light source (306), such as a cold cathode fluorescent light (CCFL). The lig ht source is arranged such that dim areas (337', 338'), i.e., areas of the ligh t source having non-uniform intensity, are not disposed adjacent the input surface.
Abstract:
Systems and methods for providing an LCD with a collimated backlight and a nonLambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) and a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source, and (2) reflecting light from said illumination source to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous.
Abstract:
Systems and methods for providing an LCD with a collimated backlight and a n on- Lambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) a nd a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source and (2) reflecting light from said illumination sour ce to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous.
Abstract:
A non-scattering light pipe (10) includes a transition surface (28, 30) between a first side wall (14) and an input suface (12) and a second side wall (16) and the input surface (12). The transition surface is arranged to substantially obscure the corner interfaces (36, 38) between the first and second side walls and the input surface such that in the corner formation any imperfections therein are not imaged into the output. Most preferably, the transition surface is optimized to provide a substantially uniform light intensity distribution. A light pipe in accordance with the preferred embodiments of the present invention is further arranged to couple a linear light source (306), such as a cold cathode fluorescent light (CCFL). The light source is arranged such that dim areas (337', 338'), i.e., areas of the light source having non-uniform intensity, are not disposed adjacent the input surface.
Abstract:
A fiber optic luminaire is arranged to couple light energy from a light source (20) along its length. The fiber optic luminaire (10) includes a plurality of light redirecting structures (14) distributed along its length; the light redirecting structures are arranged to uniformly distribute by reflection light energy from the fiber optic luminaire. The light redirecting structures (14) are preferably non-scattering structures, including structures such as microprisms, microfacets, microgrooves and micrometers. The fiber optic luminaire may be configured to a variety of shapes and to provide customized light distribution patterns.
Abstract:
Systems and methods for providing an LCD with a collimated backlight and a non-Lambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) and a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source, and (2) reflecting light from said illumination source to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous.