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30results about How to "Suppress light loss" patented technology

Light emitting device

A light emitting device has a light source having a light emitting element; and a radiator having plural plate members formed of a thermally-conductive material. The plural plate members are stacked on each other while allowing formation of a space between each other at an end portion thereof. The light source is mounted on a side surface of the plural stacked plate members.
Owner:TOYODA GOSEI CO LTD

Organic electroluminescence device

An organic EL device (1) is provided with a metal layer (2) whereon projections and recessions (2') on a nano order of magnitude are provided on one face, and a plurality of organic layers (3) that include a light emission layer (31) provided on one side of the metal layer (2). The height of the projections and recessions at each boundary face of the organic layers (3) is configured to be smaller than the projections and recessions (2') disposed on the metal layer (2). This configuration enables, due to the projections and recessions (2') of one of the faces of the metal layer (2), a reduction of the light loss that occurs in the conversion of surface plasmon to propagation light; and by making the projections and recessions of each boundary face of each organic layer (3) smaller than the projections and recessions on the face of the metal layer (2), shorts within the device can be suppressed.
Owner:SAMSUNG DISPLAY CO LTD

Illuminating device, image reading apparatus including the illuinating device, and image forming apparatus including the image reading apparatus

An illuminating device capable of stably illuminating an irradiated object such as a document while suppressing light loss with a simply structure is provided.An LED array (71) and a reflective plate (73) are disposed sandwiching a slit (St) through which light reflected by a document MS passes and a light-guiding member (72) is disposed on the side of the LED array (71). The light-guiding member (72) includes a direct emission unit (77) disposed between an illumination range y centered on a document reading position and the LED array (71) and an indirect emission unit (78) disposed between the reflective plate (73) and the LED array (71), a light incidence face of the direct emission unit (77) and a light incidence face of the indirect emission unit (78) are disposed at mutually different position around the LED array (71), and the LED array (71) is disposed on a side of an interior angle formed by the light incidence faces.
Owner:SHARP KK

Light emitting diode package and method of manufacturing the same

A light-emitting diode (LED) package includes a light-emitting structure, a transmissive material layer on the light-emitting structure, and a support structure covering at least a portion of a side surface of the transmissive material layer, a side surface of the light-emitting structure, and at least a portion of a bottom surface of the light-emitting structure.
Owner:SAMSUNG ELECTRONICS CO LTD

Backlight and displaying/imaging apparatus

The present invention provides a backlight capable of suppressing loss of light from an invisible light source and a displaying / imaging apparatus using the same. The backlight includes: a light guide plate having a light emitting face and a rear face opposed to the light emitting face; a visible light source disposed on a side face of the light guide plate; an invisible light source disposed on a side face of the light guide plate; a first reflection film disposed on the rear face side of the light guide plate, reflecting light from the visible light source, and transmitting light from the invisible light source; and a second reflection film disposed on the rear face side of the light guide plate and reflecting light from at least the invisible light source out of the visible light source and the invisible light source.
Owner:JAPAN DISPLAY WEST

Cantilever for near field optical microscopes, plasmon enhanced fluorescence microscope employing the cantilever, and fluorescence detecting method

A cantilever for near field optical microscopes is equipped with a probe in the vicinity of a free end thereof. The probe includes a thin film portion constituted by at least one layer of thin film that serves as the surface of the probe, and an inner bulk portion which is covered by the thin film portion. The outermost layer of the thin film portion is a thin dielectric film, and a metal portion is provided toward the interior of the probe from the thin dielectric film.
Owner:FUJIFILM CORP

Processing method

In a processing method using laser light, light energy is effectively used and a time necessary for processing is shortened. The processing method includes a basic shape formation step of forming a recess pattern smaller in depth than a recess shape on a surface of a workpiece; and a shape growth step of irradiating the recess pattern with laser light which has a fluence such that the etching rate at a recess bottom surface of the recess pattern is larger than the etching rate on the workpiece surface and has a beam diameter larger than a width of the recess pattern so as to process the recess shape.
Owner:CANON KK

Reflective type ferroelectric liquid crystal display and driving method thereof

The present invention discloses a reflective type ferroelectric liquid crystal display and a driving method thereof. The reflective type ferroelectric liquid crystal display comprises a display panel which is disposed between a polarization beam splitter and a mirror to satisfy a quarter plate condition, and in which a liquid crystal layer formed between electrode layers is filled with half-V type ferroelectric liquid crystal having a bookshelf structure, the electrode layers being disposed between substrates to be orthogonal and opposite to each other; and a compensation panel which is disposed between the display panel and the polarization beam splitter to satisfy a half plate condition, and in which a liquid crystal layer formed between electrode layers is filled with half-V type ferroelectric liquid crystal having a bookshelf structure, the electrode layers being disposed between substrates to be opposite to each other. Therefore, the light loss can be reduced, and thus the gray scale display can be improved.
Owner:SAMSUNG ELECTRONICS CO LTD

Planar light-emitting device and display apparatus having the same

InactiveUS7926999B2Suppress light lossWithout reducing light emission efficiencyOptical light guidesIlluminated signsEdge surfaceLight guide
A planar light-emitting device includes an elongate first lightguide plate (13) having a light entrance end surface (13a) disposed facing an exit surface (12a) of a light-emitting package (12), a reflecting side surface (13b) extending substantially at right angles to the light entrance end surface to reflect light entering through the light entrance end surface, and a light exit side surface (13c) facing the reflecting side surface, and a flat plate-shaped second lightguide plate (14) having a light entrance side edge surface (14a) facing the light exit side surface (13c). The first lightguide plate is configured to satisfy the condition of t1<t2≦t3, where: t1, t2 and t3 are the respective heights of the light exit side surface (13c), the reflecting side surface (13b) and the light entrance end surface (13a). The surfaces of the first lightguide plate other than the light entrance end surface (13a) and the light exit side surface (13c) are reflecting surfaces.
Owner:CITIZEN ELECTRONICS CO LTD

Lighting device having a smooth cut-off

The invention relates to a lighting device comprising:—at least one light source (11);—a reflective member (20) comprising a reflective surface (22) and an edge (21) (“first edge”) forming a light cut-off of light rays passing in a region adjacent to this first edge (21);—a light-modifying member (30) adapted to modify lighting feature(s) of light rays and having an edge (“second edge”). The light-modifying member (30) extends from the reflective member (20) to this second edge (31) over a surface area defined to receive a part of the light rays passing in said region. The second edge is designed such that, among said part of light rays, the light-modifying member (30) modifies proportionally more light rays passing proximate the first edge than light rays passing less proximate the first edge (21). The invention relates also to said light-modifying member (30) per se.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV

Agricultural daylighting member and agricultural box

A greenhouse has a daylighting member supported by a frame. The daylighting member partitions a growing space for agricultural products from an outside world, and emits light, which has entered from a light incident surface on one side, from a light emitting surface on the other side. The daylighting member has a transparent substrate layer and a transparent light emitting layer provided closer to a light emitting surface side than the substrate layer. The light emitting layer has a refractive index of 1.54 or less, water absorbability, and an equilibrium moisture content of 10% or greater at 25° C. and a relative humidity of 80%.
Owner:FUJIFILM CORP

Optical module and method for producing the same

An optical module includes a substrate, an optical device including a surface-emitting or -receiving element mounted on a surface of the substrate with a light-emitting or -receiving portion, an optical fiber disposed parallel to the surface of the substrate and in a longitudinal direction of the substrate, a damming member provided between the optical device and the substrate to extend in a width direction of the substrate and dividing a gap between the optical device and the substrate in the longitudinal direction of the substrate into a first portion and a second portion, and a mirror provided at one side surface of the damming member a tip of the optical fiber. The first portion provided on an opposite side to the optical fiber is filled with an underfill resin, and the second portion provided on a side close to the optical fiber is filled with an optical fiber fixing resin.
Owner:HITACHI METALS LTD

Laser module

The invention discloses a laser module. When forming the laser module which comprises a substrate and a base plate, the substrate is divided into three blocks, wherein the substrate is used for carrying a solid laser element, an excitation laser source and a wave length converting element. The solid laser element is used for emitting fundamental wave lasers through oscillation, the excitation laser source is used for exciting the solid laser element, and the wave length converting element is used for converting the wave length of the fundamental wave lasers emitted by the solid laser element through oscillation. The base plate is used for supporting the substrate. The three blocks comprise the first block carrying a laser medium, the second block carrying the excitation laser source and the third block carrying the wave length converting element. The side face or the bottom face of only the second block is fixed to the base plate, the first block is fixed to the other side face of the second block, and the third block is fixed to the side face of the first block.
Owner:MITSUBISHI ELECTRIC CORP

Objective lens for optical pickup device, optical pickup device, and optical information recording/reproduction device

Provided are: an optical pickup device and optical information recording / reproduction device provided with an objective lens capable of improving temperature characteristics and wavelength characteristics while making it possible to support three types of optical disc, namely Blu-ray Discs, DVDs, and CDs, with a shared objective lens; and an objective lens suitable therefor. A first optical-path-difference creation structure, in which at least a first basic structure and second basic structure are superimposed, reduces a step difference in the optical-axis direction, thereby keeping the diffraction efficiency from decreasing upon wavelength changes. Furthermore, when the wavelength of incident light increases, spherical aberration from the aforementioned first basic structure and second basic structure changes in the direction in which more correction is needed; thus, when the index of refraction of the objective lens changes as a result of an increase in the temperature of the optical pickup device, the fact that the wavelength of the light source also increases as a result of the increase in ambient temperature is utilized to correct spherical-aberration degradation due to the change in the index of refraction of the objective lens.
Owner:KONICA MINOLTA INC

Intensive optical wave multiplexing optical filter

The invention discloses an intensive optical wave multiplexing optical filter, which comprises a substrate, and an optical filter layer and an anti-radiation layer which respectively cover two opposite surfaces of the substrate, and is characterized in that the surface, opposite to the substrate, of the optical filter layer is also provided with an anti-scraping layer, so that the optical filter layer can be prevented from being damaged due to friction when polishing operation is required subsequently, and the yield of the optical filter is ensured; meanwhile, the first dielectric sub-layer forming the filter layer is made of silicon hydride, so that the total layer number of the filter layer is reduced to be not more than 84, and the layer thickness is not more than 20 [mu] m. Compared with the prior art, the thickness of the filter layer is greatly reduced, and light loss, light path disruption and stress accumulation caused by over-thickness of the filter layer are effectively inhibited; and the overall manufacturing cost is reduced.
Owner:GUANGZHOU JIAHE PHOTOELECTRIC TECH CO LTD

Objective lens and optical pickup device

Provided are a single-element objective lens compatible with optical disks of the three formats BD / DVD / CD, the objective lens being adaptable to compact size while having good moldability, and being capable of stable recording and playback of information due formation of an appropriate spot diameter, even during use with a BD, making the lens suitable for a compact optical pickup device; and an optical pickup device equipped with this objective lens. A first optical path difference-imparting structure in the center region of the objective lens is structured to have a (2 / 1 / 1) first fundamental structure and a (1 / 1 / 1) second fundamental structure. A second optical path difference-imparting structure in an intermediate region is structured to have a (1 / 1 / 1) fourth fundamental structure and a (7 / 4) or (5 / 3) third fundamental structure. A third optical path difference-imparting structure in a peripheral region is structured to have a fifth fundamental structure whereby the quantity of second-order or fourth order refracted light of a first light beam is greater than the quantity of refracted light of any other order.
Owner:KONICA MINOLTA INC

Optical element and objective optical system

There is provided an optical element for an objective optical system of an optical information recording / reproducing device. The objective optical system is configured to satisfy conditions: λ<500; NA≧0.7; and f≦1.0, and at least one of surfaces of the optical element includes a diffraction structure defined by an optical path difference function φ(h):φ(h)=(P2h2+P4h4+P6h6+P8h8+P10h10+P12h12)mλwhere P2, P4, P6 . . . denote coefficients of 2nd order, 4th order, 6th order . . . , respectively, h denotes a height from an optical axis of the optical element, and m denotes a diffraction order at which diffraction efficiency for the laser beam is maximized. The diffraction structure satisfies conditions:P2<0  (4);P2×P4<−100  (5); and−60<P2 / P4<0  (6).
Owner:HOYA CORP

Ojbective lens for optical pickup device and optical pickup device

Provided is an objective lens with which three types of optical disks, BB / DVD / DC, are interchangeable using a typical objective lens, and with which high-order aberrations can be suppressed and formability can be increased; also provided is an optical pickup device using said objective lens. The objective lens has a central region wherein second basic structures having a blazed structure are superposed, and an intermediate region wherein fourth basic structures having a blazed structure are superposed. On either side of the boundary between the central region and the intermediate region, the pitch P2 at the position of the second basic structures of the central region nearest to the boundary, and the pitch P4 at the position of the fourth basic structures of the intermediate region nearest to the boundary, fulfill the relationship P4 - P2 > 0 when the codes corresponding to the orientation of the steps is considered. Thus, the power in the intermediate region is greater than the power in the central region, and consequently a negative spherical aberration of the base aspherical surface remains in the intermediate region, and it is possible to emit flares when a CD is used.
Owner:KONICA MINOLTA INC
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