Patent application number | Description | Published |
20110049468 | LED AND LED DISPLAY AND ILLUMINATION DEVICES - Light emitting chips, light emitting unit cells and methods of forming light emitting chips are provided. A light emitting chip includes a light emission structure having a p-type semiconductor layer, an n-type semiconductor layer, and an active layer therebetween. At least one light emitting unit is formed from the light emission structure including a light emitting diode (LED) and a plurality of light receiving diode (LRD) portions. The LRD portions are serially connected and configured to surround the LED portion. The LRD portions are optically coupled to the LED portion to receive total internal reflection (TIR) light from the LED portion and convert the TIR light to a photocurrent. | 03-03-2011 |
20110096653 | MICRO-HOLOGRAPHIC DATA STORAGE SYSTEM AND METHOD - A micro-holographic data storage system and method. Micro-holograms are written to a data storage medium with two counter-propagating beams via objective recording lenses which have a first numerical aperture (NA) to make the micro-holograms larger. Alternatively, elongated micro-holograms can be produced using counter-propagating beams with different focus points. The micro-holograms are retrieved from the data storage medium using a single beam via an objective reading lens which has a second NA that is higher than the first NA. The data storage medium has a substrate with a plurality of tracks separated by a track pitch. The plurality of micro-holograms are each contained in each of the plurality of tracks, wherein, at least one of the plurality of micro-holograms has a width which is nearly equal to a width of the track pitch. | 04-28-2011 |
20120080411 | LASER ILLUMINATION SYSTEM WITH REDUCED SPECKLE - A despeckling device and method in which an optical path difference staircase element is disposed between a fly's eye lens array and the image plane in a position near the focus position of the fly's eye lens array, and a laser generating unit generates and transmits pulsed laser beams to the optical path difference staircase element, wherein the pulsed laser beams are driven at a very short pulsed rate. | 04-05-2012 |
20120081786 | LASER SPECKLE REDUCTION ELEMENT - Despeckle elements, laser beam homogenizers and methods for despeckling are provided. The despeckle element includes a transparent material having a first surface including a plural number of optical steps and a second surface having a plural number of microlenses. Each of the number of optical steps is in a one-to-one correspondence with at least one of the microlenses. One of the first surface and the second surface is configured to receive collimated light having a coherence length and a remaining one of the first surface and the second surface is configured to pass the collimated light separated into a plurality of beamlets corresponding to the number of microlenses. A height of each step of at least two of the optical steps is configured to produce an optical path difference of the collimated light longer than the coherence length. | 04-05-2012 |
20120192919 | FRESNEL-FLY'S EYE MICROLENS ARRAYS FOR CONCENTRATING SOLAR CELL - Optical elements, concentrating photovoltaic devices and methods of forming optical elements are provided. An optical element includes a transparent material including a first surface and a second surface opposite the first surface. The first surface has a Fresnel lens and the second surface has a plurality of microlenses corresponding to the Fresnel lens. One of the first surface and the second surface is configured to receive light. The optical element is configured so that light passing through the optical element is separated into a plurality of beamlets via the plurality of microlenses. The Fresnel lens has a height where, at the height of the Fresnel lens, a diffraction efficiency of at least two different wavelengths of the light passing through the optical element is maximized. | 08-02-2012 |
20120236701 | OBJECTIVE LENS FOR A COMBINATION THREE WAVELENGTH DISC DRIVE INCLUDING A BLU-RAY DISC READER AND A DVD/CD READER/WRITER, OPTICAL PICKUP INCORPORATING SAID OBJECTIVE LENS, AND A DISC DRIVE INCORPORATING SAID OPTICAL PICKUP - An objective lens for a slim type BD combo disc drive focuses a first light beam onto a first optical disc, a second light beam onto a second optical disc, and a third light beam having a third wavelength onto a third optical disc. The lens may include a first surface through which the first, second, and third light beams emitted from a light source enter the objective lens, and a second surface through which the first, second, and third light beams exit the objective lens and proceed toward the three corresponding optical discs. The first surface may include a diffractive surface which provides focus control in accordance with (i) 0th order light of the first and second light beams which are respectively focused onto the first and second optical discs, and (ii) 1st order diffracted light of the third light beam which is focused onto the third optical disc. | 09-20-2012 |
20120320561 | OPTICAL IRRADIATION APPARATUS - An optical irradiation apparatus includes: a light-emitting device configured to emit a plurality of light beams whose optical axes extend in a substantially identical direction; a collimator part configured to convert the light beams into parallel light beams; and a light condensing part configured to collect the parallel light beams. The light-emitting device includes a super luminescent diode array in which a plurality of waveguides are provided on a substrate. Each of the waveguides has a light-emitting facet including a light emission point from which an associated one of the light beams is emitted. The light emission points are located in a plane. The plane including the light emission points is orthogonal to a direction of an optical axis of the collimator part. | 12-20-2012 |
20140023317 | TRANSPARENT DIFFUSER FOR LIGHTING AND METHODS OF MANUFACTURING TRANSPARENT DIFFUSER - A light diffuser panel for coupling to an optical element, includes a substrate with a first surface that is diffusive to a plurality of wavelengths of light and a second surface, wherein the substrate comprises a material with a refractive index n | 01-23-2014 |
20140023319 | TRANSPARENT DIFFUSER FOR LIGHTING AND METHODS OF MANUFACTURING TRANSPARENT DIFFUSER - A light diffuser panel for coupling to an optical element, includes a substrate with a first surface that is diffusive to a plurality of wavelengths of light and a second surface, wherein the substrate comprises a material with a refractive index n | 01-23-2014 |
20140118831 | LIGHT DIFFUSER AND METHOD OF MANUFACTURING THE SAME - A light diffuser including a transparent substrate having a top surface and a bottom surface. The top surface having formed thereon a plurality of tilted plane portions including a first tilted plane portion and a second tilted plane portion. The first tilted plane portion being tilted in a first direction and the second tilted plane portion being tilted in a second direction. The first direction of the first tilted plane portion being different from the second direction of the second tilted plane portion. | 05-01-2014 |
20140268879 | TRANSPARENT WAVEGUIDE DIFFUSER FOR LIGHTING AND METHODS OF MANUFACTURING TRANSPARENT WAVEGUIDE DIFFUSER - A waveguide light diffuser panel is disclosed that diffuses source lights and transmits ambient light. Conventional waveguide light diffusers diffuse all light and therefore provide a hazy outcome. In manufacturing a waveguide transparent diffuser, a printing method, such as inkjet printing, may be used. In this method, dot micro-lenses are formed on one side of a panel, which cover a portion of the panel in a staggered or random arrangement. The other side of the panel is coated with an anti-reflective material, or the shape of the panel may be concave. The dot shape is designed for efficient reflection of the incident light, as opposed to conventional hazy diffusers in which the reflection efficiency is low. High reflection efficiency in this case compensates for the reduced dot coverage. | 09-18-2014 |