98results about How to "Increase the optical path length" patented technology

An optical fiber loop has a gain medium having a gain at an oscillation wavelength and optical circulators 13 and 14. Collimate lenses 22 and 24 enlarge light bean taken from the optical circulators 13 and 14. A polygon mirror 25 is provided on the light axis, and is rotated. A diffraction grating 27 is provided at the receiving position of the light reflected by the polygon mirror 25, and is of a Littrow configuration which reflects the light in the same direction as the incident light. A selected wavelength changes according to an incident angle to the diffraction grating 27, resulting in increase of selectivity owing to twice incident, thereby permitting to change an oscillation wavelength with narrow band even when changing the selected wavelength by rotating the polygon mirror 25 at high speed.

Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.

The invention discloses a nondestructive testing method used for testing the physiological indexes of plant leaves on the basis of invisible-near infrared spectrum, which can carry out the quick and multi-parameter testing on the content of compositions such as chlorophyll, nitrogen, lutein, water and the like simultaneously. The method carries out spectrum collection on calibration samples, subsequently preprocesses the spectrum data, preferably selects the waveband, establishes the calibration model between the spectrum value and the standard value of the content of plant component, and collects the spectrums of the unknown samples; after the spectrum data is pre-processed, the selected waveband data are substituted in the calibration model so as to predict the content of the component to be measured; the technical proposal of the invention adopts full-spectrum information; the measured parameters have strong extensibility and the prediction precision and the model adaptability of the calibration model are improved; the trans-reflective measurement type adopted by the method adopts the spectrum sensitiveness and has stronger adaptability on the leaf type; and the improved wavelet analysis method can simultaneously eliminate the noise of the leaf spectrum data and carries out benchmark line calibration pre-processing on the leaf spectrum and can effectively improve the prediction precision.

A semiconductor nanocrystal composition including a semiconductor nanocrystal, an organic additive, and at least one polymerizable substance selected from a polymerizable monomer, a polymerizable oligomer, and a combination thereof, wherein the composition has haze of greater than or equal to about 40% after polymerization.

A multi-region light scattering element with the optical characteristics of low speckle, high resolution high contrast, and high gain when used as an imaging element without any resulting loss of transmission or brightness with viewing angle. The multi-region light scattering element contains at least one region asymmetrically shaped light scattering features that are separated from a second light scattering region by a non-scattering region. In one embodiment, one or more of the regions contains particles that are asymmetrically shaped that improve the optical performance. In one embodiment, asymmetric particles are located in two regions separated by a non-scattering region with the particles within each region substantially aligned along an axis and the two axes are substantially perpendicular to each other. Methods for production of the screen element are also described.

A polymer-based microfluidic device and its manufacturing methods. This microfluidic device is suitable for chromatographic and electrophoretic separations in which the detection of the components in the fluid is by means of ultraviolet (UV) spectroscopy. The device further comprises at least one cooling channel adjacent the separation channel, said cooling channel conducting a cooling fluid through the device for removing heat from the the separation channel. At least one section of the separation channel has an increased cross-sectional dimension with respect to other sections of said channel to provide an increased optical path length when the device is used in an ultraviolet detection arrangement.

An apparatus for providing a light output to an optical guide for illumination of an imaged object including a plurality of solid state light-emitting sources each of which are independently powered and independently controlled, each light-emitting source emitting light at a wavelength which is different from the wavelength emitted by the other light-emitting sources. The apparatus also includes a heat sink configured to thermally couple the plurality of solid state light-emitting sources and provide conduction of heat generated by the plurality of solid state light-emitting sources. The apparatus further includes an optical elements to collect, collimate, and combine the emissions from the plurality of solid state light-emitting sources into a combined beam of light to be optically coupled to the light guide.

A dye-sensitized solar cell with high conversion efficiency is provided. The dye-sensitized solar cell according to the present invention has, between an electrode (2) formed on a surface of a transparent substrate (1) and a counter electrode (6), a light-absorbing layer (3) containing light-absorbing particles carrying dye and an electrolyte layer (5), characterized in that the light-absorbing layer (3) containing light-scattering particles (4) different in size from the light-absorbing particles. In such a dye-sensitized solar cell according to the present invention, the energy of light, which passes through a light-absorbing layer in a conventional cell structure, can be strongly absorbed by the dye in the light-absorbing layer of the present invention. This will increase the conversion efficiency and output current of the dye-sensitized solar cell.

A solar cell module includes: a photoelectric conversion body 101 having an uneven surface on a light-entering surface; and a protection layer 10 made of a resin and provided to cover the uneven surface. In a cross section of the protection layer 10 taken in parallel to a light-entering direction, a thickness W2 of a projected portion on the uneven surface is smaller than a thickness W1 of a recessed portion on the uneven surface.

The invention discloses the field of dynamic characteristic research for interaction of laser and atmosphere in spectrum detection for trace gas and free-space optical communication, and particularly relates to an automatic tunable system with multiple optical paths. The automatic tunable system comprises angle rotating devices, length adjusting devices, supports, motor supports, stepper motors, a DSP (digital signal processor) controller and a cylindrical main body. The main body can keep vacuum and can bear certain high pressure. Signals are inputted into the DSP controller according to requirements of the optical paths, rotational angles of concave reflectors and required voltage are computed by the DSP controller, piezoelectric transistors (PZT) can drive the concave reflectors to rotate by the rotational angles after being supplied with the required voltage, signals are outputted for triggering and driving to realize automatic angular rotation, simultaneously, the stepper motors are driven, corrugated pipes are driven to stretch or contract, and distances d among reflecting pools are horizontally increased or reduced. The automatic tunable system with the multiple optical paths has the advantages of high precision and sensitivity, simplicity in operation and automatic control function.

A multi-region light scattering element with the optical characteristics of low speckle, high resolution high contrast, and high gain when used as an imaging element without any resulting loss of transmission or brightness with viewing angle. The multi-region light scattering element contains at least one region asymmetrically shaped light scattering features that are separated from a second light scattering region by a non-scattering region. In one embodiment, one or more of the regions contains particles that are asymmetrically shaped that improve the optical performance. In one embodiment, asymmetric particles are located in two regions separated by a non-scattering region with the particles within each region substantially aligned along an axis and the two axes are substantially perpendicular to each other. Methods for production of the screen element are also described.

Present invention refers to integrated ultraviolet-visible absorbing / fluorescence two-purpose flow-through cell, referring to liquid chromatograph detector. It includes cell body, light guide quartz capillary, polyetheretherketone liner tube, self-focusing lens, seal washer, gasket, optical fiber and liquid flow path pipeline. Said Light guide quartz capillary is set in polyetheretherketone liner tube and filled in pipe cavity of cell body, self-focusing lens set in light entry direction fixed and sealed with cell body by seal washer, gasket located between self-focusing lens and polyetheretherketone liner tube, gasket notch aligned flow path direction to fill excess space, entry optical fiber, outlet optical fiber and in and out liquid pipe respectively fixed in cell body by joint and sleeve chuck to form sealed flow path.

There is provided a microchip that is formed of a first substrate having a surface with a groove and a second substrate joined together and has a fluid circuit in the form of a cavity defined by the groove and a surface of the second substrate closer to the first substrate. The fluid circuit at least includes a detection portion having an optical path for transmitting light. The microchip includes at least one of a step defined by a groove formed in contact with at least one side surface of a groove of the first substrate that defines the optical path and a recess provided in the second substrate at a position opposite to the step.

Image sensors, image pickup devices, and electronic apparatuses are provided. These can include an image sensor or image pickup device that includes a first insulating layer over a semiconductor substrate. A depression section is formed in the first insulating layer. An organic photoelectric conversion section fills the depression section. One or more inorganic photoelectric conversion sections can also be provided, with the organic photoelectric conversion section overlapping the inorganic photoelectric conversion sections. Alternatively or in addition, the depression section can taper from a side adjacent a light receiving side of the image sensor to a side adjacent the at least a first inorganic photoelectric conversion section.

A photonic microresonator incorporates a localized heater element within a section of an optical bus waveguide that is in proximity to the resonator structure. The application of an adjustable control voltage to the heater element provides a localized change in the refractive index value of the bus waveguide, compensating for temperature-induced wavelength drift and maintaining a stabilized value of the microresonator's resonant wavelength.

An apparatus for providing a light output to an optical guide for illumination of an imaged object including a plurality of solid state light-emitting sources each of which are independently powered and independently controlled, each light-emitting source emitting light at a wavelength which is different from the wavelength emitted by the other light-emitting sources. The apparatus also includes a heat sink configured to thermally couple the plurality of solid state light-emitting sources and provide conduction of heat generated by the plurality of solid state light-emitting sources. The apparatus further includes an optical elements to collect, collimate, and combine the emissions from the plurality of solid state light-emitting sources into a combined beam of light to be optically coupled to the light guide.

The invention is suitable for the technical field of detection, and provides an infrared gas sensor and an infrared gas detection device. The infrared gas sensor comprises a shell; the inside of the shell is also provided with a sensor shell; the inside of a cavity of the sensor shell is provided with an upper cover body and a lower cover body; the bottom of the upper cover body is provided with a groove; the side wall of the groove at least comprises a first inclined surface and a second inclined surface; the top of the lower cover body is provided with a first opening and a second opening which can correspond to the first inclined surface and the second inclined surface on the groove; and an infrared light source and an infrared probe are arranged in the first opening and the second opening respectively. In the invention, the infrared light emitted by the infrared light source is reflected for many times and then is absorbed by the infrared probe; and the infrared gas sensor increases the light path length of the infrared light and ensures that gas to be tested fully absorbs the infrared light, thereby improving the detection signal-to-noise ratio and measurement accuracy of the infrared gas sensor.

A light trapping optical cover employing an optically transparent layer with a plurality of light deflecting elements. The transparent layer is configured for an unimpeded light passage through its body and has a broad light input surface and an opposing broad light output surface. The light deflecting elements deflect light incident into the transparent layer at a sufficiently high bend angle with respect to a surface normal and direct the deflected light toward a light harvesting device adjacent to the light output surface. The deflected light is retained by means of at least TIR in the system formed by the optical cover and the light harvesting device which allows for longer light propagation paths through the photoabsorptive layer of the device and for an improved light absorption. The optical cover may further employ a focusing array of light collectors being pairwise associated with the respective light deflecting elements.

Photon absorption, and thus current generation, is hindered in conventional thin-film solar cell designs, including quantum well structures, by the limited path length of incident light passing vertically through the device. Optical scattering into lateral waveguide structures provides a physical mechanism to increase photocurrent generation through in-plane light trapping. However, the insertion of wells of high refractive index material with lower energy gap into the device structure often results in lower voltage operation, and hence lower photovoltaic power conversion efficiency. The voltage output of an InGaAs quantum well waveguide photovoltaic device can be increased by employing a III-V material structure with an extended wide band gap emitter heterojunction. Analysis of the light IV characteristics reveals that non-radiative recombination components of the underlying dark diode current have been reduced, exposing the limiting radiative recombination component and providing a pathway for realizing solar-electric conversion efficiency of 30% or more in single junction cells.

Disclosed is an optical conversion member, including an optical conversion layer containing quantum dot emitting fluorescent light and an anisotropic light scattering layer having I (0°) / I (40°) of 3 or greater, in which I (0°) indicates a transmission light intensity of the anisotropic light scattering layer at the time of allowing light to be incident on the anisotropic light scattering layer from a normal direction of a surface of the anisotropic light scattering layer, and I (40°) indicates a transmission light intensity of the anisotropic light scattering layer in an azimuth in which a transmission light intensity of the anisotropic light scattering layer at the time of allowing light to be incident on the anisotropic light scattering layer from a direction of a tilt angle of 40° with respect to the normal direction of the surface of the anisotropic light scattering layer becomes a minimum value.

In order to provide a multireflection cell making it possible to decrease the volume of a cell main body into which measurement target gas is introduced as well as reducing the amount of light that is lost without being reflected in a multireflection mechanism, the multireflection cell includes the multireflection mechanism adapted to multiply reflect incident light and then emit the multiply reflected light outward. In addition the multireflection mechanism includes a field mirror, a first objective mirror that faces to the field mirror and is provided on a light incident side in the multireflection mechanism, and a second objective mirror that faces to the field mirror and is provided on a light emitting side in the multireflection mechanism. Further, the light incident into the multireflection mechanism is configured to be first reflected by the second objective mirror.

An optical beam scanning device includes a rotating polygon mirror for scanning a beam from a pre-deflection optical system in a main scanning direction and two mirrors 23, 25 for imaging the beam scanned by the rotating polygon mirror 5 on an image plane. The device is arranged so that a first mirror 23 at the rotating polygon mirror side 5 has a negative power in the main scanning direction and a second mirror 25 at the image plane side has a positive power in the main scanning direction. Thereby, the degrees of freedom of shape and arrangement of process unit or the like can be made higher and an apparatus can be downsized by securing the distance between the last imaging element and the image plane while suppressing the increase in the optical path length between the reflection surface 5A of the rotating polygon mirror 5 and the image plane.

In an external force detecting device including a support section and an action section disposed inside the support section, three optical displacement sensors are provided at an equiangular distance of 120 degrees about the rotational symmetry axis of the support section and each include a light source disposed at either the support section or the action section, and a light receiving element disposed at one section of the support section and the action section, the one section not provided with the light source, and the action section is located between the light source and the light receiving element. The external force detecting device described above enables an easy mounting of constituent members and a high resolution measurement, even when the diameter of the device is reduced.

Provided are a laminate film which enables to enhance luminance, and a backlight unit and a liquid crystal display device including this laminate film, as well as a method for producing this laminate film. Provided are laminate films including an optical functional layer and a barrier layer stacked on at least one surface of the optical functional layer, laminate films each having a film having a higher refractive index than a refractive index of the optical functional layer, on a lateral surface of the optical functional layer. It is preferable that the optical functional layer include at least one of a quantum dot and a quantum rod.

The invention discloses an ultraviolet-visible spectrum in situ monitoring device capable of adjusting an optical path and a water quality multi-parameter measuring method. The monitoring device comprises a monitoring part, a light source, a collimating lens, a converging lens, an emitting part, a flat field holographic concave grating and an image detector; a monitoring probe is arranged in waterto be detected; and a second sub-chamber is filled with the water to be detected. The light source is arranged for supplying illumination, the light emitted by the light source is collimated by the collimating lens to become parallel beams, the parallel beams pass through the water to be detected in the second sub-chamber, then are converged by the converging lens and are emitted from emitting slits of the emitting part, the light emitted from the emitting slits is divided through the flat field holographic concave grating and is imaged on a light-sensitive surface of the image detector, theimage detector converts light intensity signals with different wavelengths into electrical signals, namely an ultraviolet-visible spectrum, and a controller acquires and records ultraviolet-visible spectrum signals. The monitoring device is greatly improved in monitoring efficiency and high in measurement accuracy.

A photoelectric conversion device in which photoelectric conversion in a light-absorption region in a crystalline silicon substrate is efficiently performed is provided. In the photoelectric conversion device, a light-transmitting conductive film which has a high effect of passivation of defects on a silicon surface and improves the reflectance oh a back electrode side is provided between the back electrode and the crystalline silicon substrate. The light-transmitting conductive film includes an organic compound arid an inorganic compound. The organic compound includes a material having an excellent hole-transport property. The inorganic compound includes a transition metal oxide having ah electron-accepting property.

It is an object to provide a time-domain pulsed spectroscopy apparatus in which time-domain pulsed spectroscopy of multiple samples, states thereof, and so on can be carried out easily and in a short period of time. A time-domain pulsed spectroscopy apparatus of the present invention comprises a pulsed laser light source; a splitting unit configured to split pulsed laser light from the pulsed laser light source into excitation pulsed laser light and detection pulsed laser light; a pulsed-light emitting unit; a detector; a sample holder configured to hold the sample; and sample-unit entrance and exit optical systems configured to guide the pulsed light from the pulsed-light emitting unit to the sample and to guide to the detector pulsed light reflected from or transmitted through the sample due to the irradiation; wherein the time-domain pulsed spectroscopy apparatus further comprises: at least one optical-path-length varying unit for setting a photometric range, disposed in an incident-side optical path from the splitting unit to the pulsed-light emitting unit and / or in a detection-side optical path from the splitting unit to the detector; and at least one optical delay unit for the wave form signal measurement, disposed in the incident-side optical path from the splitting unit to the pulsed-light emitting unit and / or in the detection-side optical path from the splitting unit to the detector.

The invention relates to a thin film solar cell including a transparent substrate, a transparent electrode layer, at least one photoelectric conversion unit, and a back electrode layer in this order from the light incident side. The transparent substrate includes a transparent base, a transparent undercoat layer having fine particles and a binder, and an insulating irregularity layer in this order from the light incident side. Consequently, light reflection by the transparent substrate is suppressed and optical path length of the incident light is increased due to light diffusion, so that improved optical confinement effect can be achieved.