104results about How to "Change optical properties" patented technology

A variable optical-property element includes a plurality of electrodes, a substrate which is driven by an electric force and can be deformed into a convex shape, an electrode constructed integrally with the substrate, an optical surface provided on the substrate, and a driving circuit connected to the electrodes.

An improved multifocal design for an ocular implant is provided. This ocular implant can include an accommodating intraocular lens (IOL) and a number of haptics. The accommodating IOL includes a liquid suspended between two optically transparent plates or membranes to form a pressure lens that passes optical energy. The haptics mechanically couple to the IOL in order to position and secure the IOL within the eye. The IOL achieves accommodation by using the eye's ciliary muscles to vary the surface curvature of the liquid. The liquid may have a high surface tension and be surrounded by phobic liquid. Pressure from the ciliary muscles causes fluid to be added from or withdrawn to a reservoir. Increasing/decreasing the internal pressure of the liquid changes the angle (curvature) of the surface thus changing the optical properties of the lens. When the pressure is released the liquid returns to the reservoir. The whole system may be sealed off from the interior of the eye by a membrane/transparent lens.

The invention relates to an electrophoretic color display panel, the display panel comprising at least one pixel (10, 12), the at least one pixel (10, 12) comprising a layer cavity (18ab) containing a suspension with a first set of charged particles (24a) having a first optical property and a second set of charged particles (24b) having a second optical property, and a pair of control electrodes (20a, 20b) arranged adjacent to the layer cavity (18ab), such that charged particles (24a, 24b) are essentially in-plane displaceable in an in-plane direction within the layer cavity (18ab) upon application of a control voltage over the electrode pair, wherein the in-plane distribution of charged particles (24a, 24b) having first and second optical properties in the layer cavity (18ab) depends on at least one of a differing control property additional to any polarity difference of the charged particles (24a, 24b) for each set of charged particles, or at least one additional electrode arranged adjacent to the layer cavity, wherein the electrode pair (20a, 20b) and the at least one additional control electrode are arranged essentially outside of a viewing area (26) of the at least one pixel (10, 12), such that a composite optical property of at least a portion of the at least one pixel (10, 12) is controllable. According to the invention, the control electrodes will be arranged at essentially the outer ends, or arranged in-plane, at a peripheral, of a prolonged layer cavity, such that the particles move in an in-plane direction within the layer cavity when the control voltage is applied. This facilitates the handling of the pixel since the layer cavity can be reached from essentially the outside of the pixel. Another advantage is that since only a minor part of the pixel area has to be covered with an electrode material the total transmission and thus the brightness of the pixel can be optimized.

One method for playing a disk, comprises illuminating a first portion of the optical article with a first laser to obtain a first optical signal, wherein the first laser has a first wavelength, illuminating a second portion with a second laser to obtain a second optical signal, wherein the second laser has a second wavelength that is different from the first wavelength, and determining if the optical article is authentic by comparing the first optical signal and the second optical signal.

Variable liquid crystal devices for controlling the propagation of light through a liquid crystal layer use a frequency dependent material to dynamically reconfigure effective electrode structures in the device. The frequency of a drive signal that generates an electric field in the device may be varied, and the frequency dependent material has different charge mobilities for the different frequencies. At a low charge mobility, the frequency dependent material has little effect on the existing electrode structures. However, at a high charge mobility, the frequency dependent material appears as an extension of the fixed electrodes, and may be used to change the effective electrode structure and, thereby, the spatial profile of the electric field. This, in turn, changes the optical properties of the liquid crystal, thus allowing the optical device to be frequency controllable.

Variable liquid crystal devices for controlling the propagation of light through a liquid crystal layer use a frequency dependent material to dynamically reconfigure effective electrode structures in the device. The frequency of a drive signal that generates an electric field in the device may be varied, and the frequency dependent material has different charge mobilities for the different frequencies. At a low charge mobility, the frequency dependent material has little effect on the existing electrode structures. However, at a high charge mobility, the frequency dependent material appears as an extension of the fixed electrodes, and may be used to change the effective electrode structure and, thereby, the spatial profile of the electric field. This, in turn, changes the optical properties of the liquid crystal, thus allowing the optical device to be frequency controllable.

Variable liquid crystal devices for controlling the propagation of light through a liquid crystal layer use a frequency dependent material to dynamically reconfigure effective electrode structures in the device. The frequency of a drive signal that generates an electric field in the device can be varied, and the frequency dependent material has different charge mobilities for the different frequencies. At a low charge mobility, the frequency dependent material has little effect on the existing electrode structures. However, at a high charge mobility, the frequency dependent material appears as an extension of the fixed electrodes, and can be used to change the effective electrode structure and, thereby, the spatial profile of the electric field. This, in turn, changes the optical properties of the liquid crystal, thus allowing the optical device to be frequency controllable.

A thermal ink layer (102) formed by a thermochromic material changing from a black color to a transparent state when heated is arranged on a base (101) which is a PET film. A cholesteric liquid crystal layer (103) in which an appropriate pattern of hologram (105) is formed is arranged on the thermal ink layer (102). At room temperature, the thermal ink layer (102) exhibits the light absorption characteristic and the selective reflection characteristic and it is possible to observe the color shift characteristic of the cholesteric liquid crystal layer (103). When heated, the thermal ink layer (102) becomes transparent and the pattern (104) on the base (101) is further observed in the superimposed state. By utilizing the change of the view, it is possible to authenticate a commodity. This realizes a higher level for preventing forgery than the conventional discrimination technique and enables a user to easily and surely judge whether a commodity is a forged one.

The invention relates to a 3D printing device and method of biological tissue optical simulation. By mainly employing the 3D printing principle and based on a multi-channel melting and depositing nozzle, a heterogeneous optical simulation capable of accurately simulating the optical characteristics of a biological tissue can be rapidly prepared and the calibration of various optical medical image instruments can be met.

An optical element includes a first liquid, a second liquid, and a container, wherein the first liquid and the second liquid substantially differ in refractive index and are immiscible, the first liquid and the second liquid are hermetically placed in the container so that an interface between the first liquid and the second liquid forms a specific shape, the shape of the interface between the first liquid and the second liquid is changed by applying a voltage between the first liquid and the second liquid through electrodes formed in the container, and the container is (1) a resin container of which an inner surface portion of a container wall has a resin phase with a fluorine atom content higher than that of an internal portion of the container wall, (2) a container of which a top portion and a bottom portion are formed of a resin composition including a resin and a hindered amine compound having a transmittance of light with a wavelength of 400 nm measured for a 5 wt % chloroform solution using a cell with 10-mm optical path of 90% or more and a molecular weight of 1500 or more, or (3) a container of which an inner surface is coated with a CVD film formed of a fluorocarbon compound. According to the present invention, an optical element can be provided of which the refractive power for light passing therethrough can be efficiently controlled with a small configuration utilizing an electrowetting phenomenon and which allows continuous transmission or concentration of light from a blue laser (short-wavelength laser).

The present invention provides a new category of information storage material, nonstoichiometric metal-organic complex Ag1-beta(TCNQ), which is particularly suitable for digital video disc (DVD-R) operated by blue laser (wavelength 450 nm) or red laser (wavelength 650 nm), wherein, Ag is silver, TCNQ is tetracyano-p-quinodimethane C12H4N4, beta is a parameter chosen by its performance and beta<=0.4. The material can produce apparent absorption change under the incidence of the above-mentioned two different lasers. When used as optical recording medium, it has the advantages of high signal-to-noise ratio, fast response and low cost. The actual number of write-erase cycles can be larger than 20. Therefore, its performance is better than a conventional DVD-R.

Eye prescriptions may be determined by providing a simple, easy to use, portable device with a specially configured targeting light source that aligns the eye, mitigates accommodation, and provides accurate results. Unlike stationary, closed view autorefractors, this device typically is portable, self-usable, relatively inexpensive, enabling more widespread use across the world.

The invention provides a photon crystal gel material for detecting glucose, which comprises polyacrylamide-acrylic acid gel and a photon crystal embedded in the gel, wherein the gel is directly or indirectly chemically grafted with phenylboronic acid groups, and the photon crystal is two-dimensional photon crystal or three-dimensional photon crystal. The invention also provides a glucose detection method based on the photon crystal gel material, and the color information displayed after the photon crystal gel material detects a glucose solution is converted into glucose concentration information. The glucose detection method provided by the invention can qualitatively or quantitatively detect glucose concentration with high selectivity, sensitivity, convenience and visualization, and provide a novel non-invasive detection method for urine glucose monitoring of diabetics.

The invention discloses a quantum dot purification method. The method includes the steps of: providing a quantum dot solution containing an ion precursor; mixing an organic phosphine compound with thequantum dot solution containing the ion precursor to react the organic phosphine compound with the ion precursor in the quantum dot solution; and adding a precipitant at the end of the reaction, andtaking the solid phase, thus obtaining the quantum dot. The method provided by the invention can effectively remove a large number of residual cationic precursors in the quantum dot solution completely. More importantly, the optical properties of the quantum dot itself do not change significantly. The method has the characteristics of simple purification process and easily repeatable operation, solves the shortcomings of quantum dot related applications in the prior art, and provides more possibilities for preparation of high-efficiency QLED devices.

The invention relates to a light path interchange device based on total reflection, which consists of eight isosceles right-angle prisms with the same specification; a light path structure control system between an incident light beam and an outgoing light beam is formed by the eight prisms; and two parallel incident light beams are totally reflected by the system for four times and are then emitted in parallel, so that position interchange can be realized, but the interval and the optical property of the two light beams are not changed. The light path interchange device is small in volume, simple in structure, stable in control and free from the influence for light beam polarization state.

This invention discloses an integral method and its structure for a laser rod cavity including bonding common host crystals of unmixed laser active ion on one or two ends of mixed laser active ion laser crystal by heat to form two end caps to be filmed after optical process. The common host crystal of mixed laser rod crystal and unmixed laser active ions can be: Nd: YAG and unmixed YAG, Yb: YAG and unmixed YAG, Nd, GdVO4 and unmixed GdVO4, Yb:GdVO4 a and unmixed GdVO4, Lateral pump rod-cavity integral laser elements and end face pump rod-cavity integral laser elements can be processed according to different needs by filming, realizing the integral of resonant cavity and its working subjects.

A method for producing a toughened glass article with a functional coating comprises providing a chemically toughened glass substrate with a first and a second face and a thickness (t) there between.The glass substrate has a surface layer with a compressive stress (CS) extending to a depth-of-layer (DoL) below the first and/or second face. The method further comprises applying a sol-gel coating to the first and/or the second face of said glass substrate and curing the sol-gel coating by heating it to curing temperatures above T a-200 DEG C during a curing time t c to produce the durable functional coating. The curing time t c satisfies formula (I) wherein T a is the temperature at the annealing point of the glass material of the glass substrate and T c is the maximum curing temperature, where T a and T c are given in DEG C. Further provided is a toughened glass article with a durable functional coating, in particular produced by the method according to the invention.

The invention discloses a green and simple method for preparing a Cu-doped selenide multi-element alloy quantum dot. The method comprises the following steps: preparing a Se precursor solution and a Zn precursor solution; and adding a Zn salt, a In salt, a Cu salt and an organic cladding agent into octadecene (ODE), heating to obtain a transparent solution, heating the transparent solution in the presence of a protection gas, mixing the heated transparent solution with the Se precursor solution, and reacting to obtain the Cu:Zn-In-Se bare nucleus quantum dot. The method has the advantages of safe and simple synthesis conditions, and no heavy metal element Cd, organophosphorus or other toxic inflammable reagents; and the luminescence efficiency of the quantum dot is high, the fluorescence peak of the quantum dot is tunable from 560nm to 720nm, and the PL QY can reach 38%.

The invention provides a light adjusting structure of a display device, a backlight module and a display device, belongs to the technical field of display, and solves the problem that the existing light guide plate cannot control the image display luminance in a local display position. In the light adjusting structure of the display device disclosed by the invention, scattering netted dots in a light guide plate main body are mainly made of electrochromic refractive materials, and electric fields in the positions of the scattering netted dots are changed through an electric field control unit to change refractive indexes of the scattering netted dots so as to change optical properties of electrochromic refractive index materials, so that the light guide plate is in a total reflection state, that is, the light guide plate has no emergent light, and the backlight module is further in a dark state; or the light is refracted from the scattering netted dots and in diffuse reflection to make the backlight module in a bright state, so as to improve local dynamic dimming of different regions of the display device and improve the image display contrast. The backlight module disclosed by the invention is suitable for various display devices.