132 results about "Dichroism" patented technology

The present invention relates to a liquid crystal light modulating device comprising substrates coated with a transparent conductive layer and a liquid crystal composition sandwiched between the substrates with a dichroic dye added; the resulting liquid crystal light modulating device can exist in at least two stable states that remain substantially stable after removal of a voltage, wherein at least one of them is the liquid crystal molecules arranged in a substantially ordered manner, and at least one of them is the liquid crystal molecules arranged in a multi-domain and disordered manner; the applied voltage makes the arrangement of liquid crystal molecules can be quickly switched between the above stable states, and different liquid crystal molecule arrangements from the stable states can be obtained; the above liquid crystal light modulating device for incident light can be adjusted between the minimum absorption and minimum scattering state of high clarity and transparency to the maximum absorption and maximum scattering state of the private state, and at the same time realizes the zero-power privacy protection and zero-power clarity and transparency of the two states, and obtains the excellent regulation of the sun's radiant energy and energy-saving light modulating glass that can quickly switch between transparent and privacy-protecting states.

The present application relates to a liquid crystal dimming device, comprising a substrate coated with a transparent conductive layer and a liquid crystal composition with a dichroic dye added thereto sandwiched between the substrates; the resulting liquid crystal dimming device can have at least two stable states that remain basically stable after the voltage is removed, at least one of which is that the arrangement of liquid crystal molecules is basically orderly, and at least one is that the arrangement of liquid crystal molecules is multi-domain and disordered; an external voltage is applied so that the arrangement of liquid crystal molecules can be quickly switched between the above-mentioned stable states, and a liquid crystal molecule arrangement different from the stable state can also be obtained; the above-mentioned liquid crystal dimming device can adjust the incident light between a highly clear and transparent minimum absorption and minimum scattering state to a privacy state of maximum absorption and maximum scattering state, while realizing zero power consumption privacy protection and zero power consumption clear and transparent states, obtaining excellent solar radiation energy regulation and energy-saving intelligent dimming glass that can quickly switch between high-definition transparent and privacy protection states.

An optically active nanocomposite material is provided that may have a textured substrate and a multilayer optic stack with a plurality of layers comprising nanoplatelets. The nanoplatelets may be achiral and formed of a material such as transition metal chalcogenides, Mxenes, or nanocarbons. The optically active nanocomposite material displays both linear birefringence (LB) and linear dichroism (LD) and optional circular dichroism (CD). The nanocomposite may have an optical asymmetry g-factor of greater than or equal to about 1. Further, the nanocomposite is thermally stable, for example, to a temperature of greater than or equal to about 250° C. Different methods of fabricating such nanocomposites using layer-by-layer (LBL) processes are also provided.

The invention provides a light generating system (1000) comprising light generating devices (110,120,130), a luminescent material (200), a control system (300), optics (500), a polarization control system (600), a diffuser system (1710), and a light exit (1090); wherein: (I) each of the light generating devices (110,120,130) comprise a solid-state light source (10,20,30); the luminescent material (200) is configured to convert at least part of the device light received by the luminescent material (200) into luminescent material light (201): the diffuser system (1710) is configured to diffuse at least part of the device light received by the diffuser system (1710) into diffused device light (711); (II) the optics (500) comprise redirection optics (510); wherein the redirection optics (510) comprise polarization based redirection optics (PPBS1,PBS2) and dichroic based redirection optics (DBS1,DBS2); (III) a first dichroic redirection optics (DBS1) is configured to combine first device light (111) and second device light (121) received by the first dichroic redirection optics (DBS1); the polarization control system (600) is configured to control a polarization of device light propagating from the first dichroic redirection optics (DBS1) to the first polarization redirection optics (PPBS1) via the polarization control system (600); the first polarization redirection optics (PPBS1) is configured to direct device light received from the first dichroic redirection optics (DBS1), in dependence of its polarization, to one or more of (a) the luminescent material (200) via second dichroic redirection optics (DBS2) and (b) the diffuser system (1710) via second polarization redirection optics (PBS2); the second dichroic redirection optics (DBS2) is configured to direct device light received from the first polarization redirection optics (PPBS1) to the luminescent material (200) and to direct the luminescent material light (201) to the light exit (1090); the second polarization redirection optics (PBS2) is configured to direct the device light received from the first polarization redirection optics (PPBS1) to the diffuser system (1710) and to direct diffused device light (711) to the light exit (1090); and (IV) the control system (300) is configured to control a spectral power distribution of system light (1001) of the light generating system (1000).

The invention provides a high-reliability dye PDLC composition, a PDLC dimming film and a preparation method of the PDLC dimming film. The dye PDLC composition comprises the following components in percentage by weight: 35 to 67 percent of liquid crystal composition, 1 to 8 percent of dichroic dye, 30 to 60 percent of polymer precursor, 0.05 to 3 percent of photoinitiator and 0.2 to 1 percent of spacer particles. The dichroic dye comprises at least one kind of dichroic yellow dye, at least one kind of dichroic red dye, at least one kind of dichroic purple dye and at least one kind of dichroic blue dye. By selecting the specific dichroic dye, the PDLC dimming film is rich and changeable in color and particularly good in black display effect, has the high optical performance that the on-state haze is smaller than 4%, the off-state haze is larger than 95% and the contrast ratio is larger than 5, has excellent UV resistance and heat-resistant stability and is not prone to fading, and therefore the actual requirement for long-term use in various application scenes can be met.

The invention discloses a flexible PDLC (Polymer Dispersed Liquid Crystal) dimming film based on dichroic dye as well as a preparation method and application thereof, and belongs to the technical field of photoelectric materials. The problems that the current PDLC dimming film preparation process is not environment-friendly, the operation is complicated, the flexibility is poor and the like are solved. The preparation method of the flexible PDLC dimming film comprises the following steps: (1) mixing an ultraviolet curing adhesive, a nematic phase mixed crystal, a rigid spacer and a dichroic dye to obtain a mixture; (2) substrate treatment; and (3) filling the mixture between two flexible substrates, and curing with ultraviolet light. Volatile resin and ester plasticizers in a traditional formula are replaced with the ultraviolet curing adhesive, toxic and harmful substances are prevented from being used, the preparation process is environmentally friendly and safe, meanwhile, the conductive flexible substrate is combined with the ultraviolet curing adhesive, the limitation of a rigid substrate is broken through by means of high toughness of the ultraviolet curing adhesive, and the conductivity of the conductive flexible substrate is improved. By introducing the dichroic dye, the off-state transmittance is reduced, the contrast ratio is improved, and the long-term stability of the PDLC dimming film is enhanced.

The present invention discloses a variable tint lens and eyeglasses using the lens, wherein the variable tint lens includes a tint varying film including transparent first and second substrate layers, a liquid crystal layer, and a power supply device for supplying power to each layer of the tint varying film; a dichroic dye molecule layer is provided on a surface of liquid crystal molecules of the liquid crystal layer, and a direction in which the liquid crystal molecules are aligned in each layer of the tint varying film is adjustable with a voltage provided by the power supply device. The whole lens can adjust swiftly and features a fast response; the adjustable range is large because of the simple structure and high transmittance. Moreover, it can also enable multi-tint adjustment when a multi-layer tint varying film is used for the lens; it can also adapt to various environments.

The invention provides a dye liquid crystal dimming device which comprises a pair of transparent conductive base layers and a dye liquid crystal layer arranged between the transparent conductive base layers, and the dye liquid crystal layer is filled with at least one cholesteric liquid crystal composition, at least one elastic constant regulator and at least one dichroic dye; the dye liquid crystal layer has at least three states under an applied voltage, namely a transparent state in which incident light is transmitted to the greatest extent, a dark state in which the incident light is basically transmitted and absorbed, and a shielding state in which the incident light is basically absorbed and scattered, the dark state is still basically stable after the voltage is withdrawn, and the shielding state is still stable after the voltage is withdrawn. The transparent state and the shielding state need to be basically stable by continuously applying voltage; according to the liquid crystal dimming device, the elastic constant regulator is further added into the liquid crystal mixture, so that a dark-state non-uniform texture is eliminated, and meanwhile, the contrast ratio of the device is improved.

The invention relates to a large-size wide-spectrum infrared color separation film with controllable surface precision and a manufacturing method thereof, the color separation film takes a silicon plain film as a substrate, a color separation film is designed on a light incident surface of the silicon substrate, germanium and zinc sulfide are used as high and low refractive index materials of a reflecting film stack, ytterbium fluoride is added in a matching layer, the film thickness ratio is regulated and controlled, and a thin film deposition process is optimized. The surface type change caused by the film layer is reduced; a thickness compensation film layer is added when the antireflection film is designed on the light transmission surface of the silicon substrate, so that the stress of the antireflection film and the stress of the color separation film are mutually counteracted, and the surface type is controlled. Appropriate substrate temperature, deposition rate and local film layer ion auxiliary deposition are adopted in the preparation of the color separation film, and the environmental reliability is good. The prepared large-size color separation sheet is controllable in surface type, the surface type precision RMS of the color separation surface is 0.028 lambda, the surface type precision RMS of the anti-reflection surface is 0.042 lambda, the large-size color separation sheet can highly reflect a broadband of 2-3.95 microns and highly transmit a broadband of 4.2-5.1 microns, and the large-size color separation sheet can be used for spectrum color separation of a large-view-field infrared optical system.

The invention relates to a liquid crystal dimming device which comprises a base material coated with a transparent conducting layer and a liquid crystal composition clamped between the base material and added with dichroic dye. The obtained liquid crystal dimming device can have at least two stable states which are still kept basically stable after voltage evacuation, at least one stable state is that liquid crystal molecules are arranged basically in order, and at least one stable state is that the liquid crystal molecules are arranged in a multi-domain and disordered mode. External voltage enables the arrangement of the liquid crystal molecules to be quickly switched between the stable states, and liquid crystal molecule arrangement different from the stable states can be obtained; according to the liquid crystal dimming device, incident light can be adjusted between highly clear and transparent minimum absorption and minimum scattering states and maximum absorption and maximum scattering states of a private state, and two states of zero-power-consumption privacy protection and zero-power-consumption clear and transparent states are realized at the same time; and the energy-saving intelligent dimming glass which is excellent in solar radiation energy adjustment and can be quickly switched between a high-definition transparent state and a privacy protection state is obtained.

This invention provides a liquid crystal light control element with which it is possible to achieve both an antiglare function and a heat generation suppression function. According to an embodiment, this liquid crystal light control element is characterized in that: the element includes a pair of transparent electrode substrates having a transparent electrode layer, and a light control layer disposed inside the transparent electrode substrates and containing liquid crystal molecules; the light control layer contains a dichroic dye; and the visible light transmittance of the transparent electrode substrates is 89% or less, and the visible light reflectance of the transparent electrode substrates is 6.5% or more.

The present invention provides an optical laminated film with an adhesive layer that prevents the inclusion of air bubbles near the edges when bonding to the surface of the substrate. [Solution] The adhesive-layered optical laminated film 1A comprises, in this order, a surface protective film 7, an optical laminated film 4A containing a polarizer 2 on which a dichroic dye is adsorbed and oriented, an adhesive layer 5, and a separator 6 that is peelably in contact with the adhesive layer 5. On at least a portion of the side surface of the adhesive-layered optical laminated film 1A, the adhesive layer 5 and the separator 6 protrude outward by 1 μm to less than 10 μm beyond the outermost position of the optical laminated film 4A, and the protruding portion of the adhesive layer 5 is curved upward by 1 μm or more towards the optical laminated film 4A. When the separator 6 is peeled off and the optical laminated film 4A is bonded to the surface of the adherend, the outermost edge of the adhesive layer 5 does not come into contact with the surface of the adherend first, and therefore air bubbles are less likely to be introduced.

The invention relates to a laminate. The purpose of the present invention is to provide a laminate capable of suppressing halo phenomenon while ensuring good brightness in a display device capable of local dimming. The solution of the present invention is a laminate comprising a low-reflection film and a functional layer, the low-reflection film having a visible light average reflectance of 0.05% to 5% and a total light transmittance of 93% or more, and the functional layer having an average reflectance of 0.05% to 5% and a total light transmittance of 93% or more. The functional layer is a film obtained by curing a liquid crystal compound and a dichroic dye in a state in which the liquid crystal compound and the dichroic dye are oriented in a direction perpendicular to the plane of the layer. The amount c (parts by mass) of the dichroic dye contained in the functional layer per 100 parts by mass of the liquid crystalline compound and the thickness t ([mu] m) of the functional layer satisfy the following formula (1): 5 < = c * t < = 40.

This application discloses a display panel, its manufacturing process, and a display device, relating to the field of display technology. The display panel includes a color filter substrate and an array substrate disposed opposite each other. The display panel also includes a liquid crystal composite layer, an electrode layer, an upper polarizer, and a lower polarizer. The liquid crystal composite layer is disposed between the color filter substrate and the array substrate. The liquid crystal composite layer includes liquid crystal molecules and dichroic dye molecules, with the absorption axis of the dichroic dye molecules perpendicular to the long axis of the liquid crystal molecules. The electrode layer includes a first electrode and a second electrode disposed on the array substrate. The first and second electrodes drive the liquid crystal composite layer, which includes a first state and a second state. The first and second electrodes control the switching of the liquid crystal composite layer between the first and second states. The display panel of this application achieves bright and dark states by controlling the switching of the liquid crystal composite layer between the first and second states through the electrode layer.

An image acquisition assembly for an optical instrument comprises a beam-splitting prism (30) with a light-entry surface (31), a dichroic reflective layer (32) or interface, a first light-emission surface (34) and a second light-emission surface (35), at least two image sensors (40, 50), and a mounting device. A first image sensor (40) is located at the first light-emission surface (34) of the prism (30), and a second image sensor (50) is located at the second light-emission surface (35) of the prism (30). The mounting device includes a first socket (60; 60'; 60") for mechanically rigidly connecting the first image sensor (40) to the prism (30) and a second socket (80; 80'; 80") for mechanically rigidly connecting the second image sensor (50) to the prism (30).The first version (60; 60'; 60") has at least one stop for abutting a first stop surface (36) of the prism (30) and for abutting a stop surface (46) on the first image sensor (40). The second version (80; 80'; 80") has at least one stop for abutting a second stop surface of the prism (30) and / or for abutting a stop surface (56) on the second image sensor (50), wherein a defined gap is provided between the prism (30) and the first image sensor (40) and / or between the prism (30) and the second image sensor (50). A defined gap is provided between the prism (30) and the first image sensor (40) and / or between the prism (30) and the second image sensor (50).

The invention relates to a vertical polarizing film. The present invention addresses the problem of providing a vertical polarizing film having low haze, low dye transferability, and excellent light resistance. [Solution] The vertical polarizing film is a cured film of a composition containing two or more polymerizable liquid crystal compounds and a dichroic dye, and the absorbance of the vertical polarizing film satisfies formula (1) Azgt; (Ax + Ay) / 2, Formula (2) 0.001 < = Ax < = 0.1 and Formula (3) Ax (z = 60) / Axgt; 5, the polymerizable liquid crystal compound shows a smectic liquid crystal phase, the polymerizable liquid crystal compound contains the polymerizable liquid crystal compound (A) and the polymerizable liquid crystal compound (B) at a mass ratio of the polymerizable liquid crystal compound (A) to the polymerizable liquid crystal compound (B) of 85 / 15 to 15 / 85, and the mass of the dichroic dye is less than 2.5 parts by mass when the total mass of the polymerizable liquid crystal compound is taken as 100 parts by mass. The thickness of the vertical polarizing film is 0.65 [mu] m or more.

A spectrometer device comprises at least a first light source (10) emitting light in a first illumination wavelength range and at least a first spectral analyzer (26, 26a) adapted to analyze light in a first analyzer wavelength range. A dichroic first illumination mirror (16, 16a) is provided to reflect light in the illumination wavelength range from the first light source (10) towards a target (12). A dichroic first analyzer mirror (18, 18a) reflects light in the analyzer wavelength range that returns from the target towards the spectral analyzer (26, 26a). The first illumination mirror (16, 16a) is transmissive for light in the first analyzer wavelength range and the first analyzer mirror (18, 18a) is transmissive for light in the first illumination wavelength range. The first illumination mirror (16, 16a) intersects the first analyzer mirror (18, 18a).

The invention discloses a magnetic circular dichroism spectrum and magnetic rotation dispersion simultaneous measurement method. Substituting test data of a magnetic circular dichroism spectrum and magnetic rotation dispersion simultaneous measurement device based on a time sequence polarization measurement method into a spectrograph CCD (Charge Coupled Device) receiving light relative intensity principle formula, establishing an equation set, and solving a normalized Stokes parameter average value of sample transmission light; and obtaining a test result according to the relationship between the magnetic circular dichroism and magnetic circular birefringence quantization parameters and the Stokes parameter. According to the test method disclosed by the invention, test results of two characteristics of the magnetic circular dichroism spectrum and the magnetic rotation dispersion of the material can be obtained in one test; the test principle is direct, the test method is simple, rapid and effective, the required device is relatively simple, the actual wave plate retardation function and the spectrometer polarization effect are considered, and a large amount of data is averaged; and the test result is idealized and high in accuracy. The test method is beneficial to integration of related test functions of the composite equipment, and is beneficial to popularization in the related scientific research and test technical field.

This invention provides a diazobiphenyl dye for thin-film polarizers, which is an analog of AD1. Thin-film polarizers prepared using this dye exhibit good optical quality, such as low light scattering, high dichroism ratio, broadband absorption, and / or stability to heat and light irradiation. This invention also provides a method for preparing the diazobiphenyl dye from two different monoazo dyes via a cross-coupling reaction. This method is eco-friendly because it does not use toxic benzidine as a raw material. The product (diazobiphenyl dye) obtained by this method can be purified in a simple and convenient manner, and the diazobiphenyl dye prepared by this method can have a symmetrical or asymmetrical structure. Furthermore, this invention provides a thin-film polarizer comprising the diazobiphenyl dye and an apparatus for display applications comprising the thin-film polarizer.

A polarizing plate including a first light absorption anisotropic layer containing a first dichroic coloring agent, which has a first light absorption property in which an absorbance is maximal at a first wavelength, and has a first absorption axis exhibiting the first light absorption property along one direction, and a second light absorption anisotropic layer containing a second dichroic coloring agent, which has a second light absorption property in which an absorbance is maximal at a second wavelength different from the first wavelength, and has a second absorption axis exhibiting the second light absorption property along one direction, in which the first light absorption anisotropic layer and the second light absorption anisotropic layer are laminated in an aspect in which the first absorption axis and the second absorption axis intersect with each other.

The invention discloses a preparation method of a display substrate with a polarizing film layer structure. The preparation method comprises the following steps: S1, pretreating the surface of the substrate; s2, forming a bonding layer on the pretreated substrate: dissolving a polymer binder in a solvent to prepare a binder solution, and spraying the binder solution on the surface of the substrate; s3, forming a polarization functional layer on the bonding layer: dissolving a film forming polymer and dichroic dye to prepare a polarization solution, spraying the polarization solution on the bonding layer, and applying an orientation field in the film forming process to enable the dichroic dye to be directionally arranged; and S4, forming a protective layer on the polarized functional layer: dissolving a protective material to prepare a protective solution, spraying the protective solution on the surface of the polarized functional layer, and curing. According to the preparation method of the display substrate with the polarizing film layer structure, the polarizer film layer structure is formed by directly spraying on the surface of the substrate, double breakthrough of process simplification and performance optimization is achieved, the light and thin degree is improved, the adhesive force between the film layers is high, and good durability is achieved.

The invention provides a light generating system (1000) comprising light generating devices (110,120,130), a luminescent material (210), a control system (300), redirection optics (510), a diffuser system (1710), and a light exit (1090); wherein: (A) (i) a first light generating device (110) is configured to provide first device light (111) having a first centroid wavelength (λc1), (ii) a second light generating device (120) is configured to provide second device light (121) having a second centroid wavelength (λc2), and (iii) a third light generating device (130) is configured to provide third device light (131) having a third centroid wavelength (λc3); wherein λc3≠λc1 and λc3≠λc2; wherein the first device light (111), the second device light (121), and the third device light (131) reaching the redirection optics (510) comprise linear polarized light; (B) the luminescent material (210) is configured to convert at least part of device light into luminescent material light (201): (C) the diffuser system (1710) is configured to diffuse at least part of the third device light (131) received by the diffuser system (1710) into diffused device light (711); (D) the redirection optics (510) comprise (a) a first polarizing beam splitter is configured to combine the first device light (111) and the second device light (121); (b) one or more further polarizing beam splitters configured to (a) direct third device light (131) in an optical path to the luminescent element (200) and in an optical path to the diffuser system (1710) in dependence of the linear polarization of the third device light (131), and (ii) split third device light (131) propagating to the diffuser system (1710) from diffused device light (711) emanating from the diffuser system (1710); (c)one or more dichroic based redirection optics are configured to (a) direct the combined device light (116) and at least part of the third device light (131), received from the first polarizing beam splitter to the luminescent element (200), (ii) split the combined device light (116) from the luminescent material light (201), and (iii) direct the luminescent material light (201) and the diffused device light (711) to the light exit (1090); (E) the light generating system (1000) is configured to generate in an operational mode system light (1001) comprising at least part of the luminescent material light (201) and at least part of the diffused light (711), and wherein the system light (1001) is white light; and (F) the control system (300) is configured to control a spectral power distribution of the system light (1001).

A mono-azo dichroic dye compound represented by the following Chemical Formula 1, a composition for polarizing plate, a polarizing plate, and an optical device.In Chemical Formula 1, Z represents any one selected from the group consisting of CN, COOR11, indanone and 1,3-dioxoindane, wherein R11 is any one selected from the group consisting of alkyl groups, aryl groups, and substituted or non-substituted heteroaryl groups. The mono-azo dichroic dye compound shows excellent dichroic properties, and has excellent heat resistance and photo-resistance, and thus may be used advantageously for a dye-based polarizing plate.

The present invention relates to the technical field of dimming films, and particularly to a dye PDLC composition and a PDLC dimming film. Based on the total weight of the dye PDLC composition being 100%, the dye PDLC composition comprises the following components in percentage by weight: 35-66% of a liquid crystal composition, 3-7% of an anthraquinone-type dichroic dye, 30-60% of a polymer precursor, 0.05-3% of a photoinitiator, and 0.2-1% of a spacer. The polymer precursor comprises an oligomer and an active diluent with a mass ratio of 1:(2-7). The components of the dye PDLC composition provided by the present invention act synergistically, and the PDLC dimming film prepared therefrom has a high off-state haze, a low on-state haze, and a low driving voltage, and at the same time has excellent properties such as light absorption and heat insulation, a wide full-light dimming range, and color tunability.

The invention discloses an objective index method for evaluating a dichroism contrast improvement condition. The method comprises the following steps: converting a normal image and a first image represented by a red-green-blue color space into a first conversion image and a second conversion image represented by a laboratory color space; obtaining an initial pixel in the first conversion image; respectively calculating the difference values of the brightness component, the red-green component and the yellow-blue component in the eyes of the person with normal color vision; target pixels which are difficult to distinguish are determined in the initial pixels according to the difference value; respectively calculating a plurality of experimental color differences in combination with the weight adjustment coefficient of the lightness difference; the plurality of experimental chromatic aberration are chromatic aberration of the target pixel in the eyes of the abnormal color vision person and the normal color vision person in the first conversion image and chromatic aberration of the target pixel in the eyes of the abnormal color vision person in the second conversion image, an objective index value corresponding to the first image is calculated in combination with a chromatic aberration value adjustment coefficient, and then an optimal image is screened out.

The present invention relates to the technical field of dimming films, and in particular, to a dye PDLC composition and a PDLC dimming film. Based on the total weight of the dye PDLC composition being 100%, the dye PDLC composition comprises the following components in weight percentage: a liquid crystal composition 35-66%, an anthraquinone-type dichroic dye 3-7%, a polymer precursor 30-60%, a photoinitiator 0.05-3%, and a spacer 0.2-1%, the polymer precursor comprising an oligomer and a reactive diluent in a mass ratio of 1:(2-7). In the dye PDLC composition provided by the present invention, the components synergistically interact, and the PDLC dimming film prepared therefrom exhibits high off-state haze, low on-state haze, and low driving voltage, while also having excellent performance in light absorption and heat insulation, a wide full-light dimming range, and adjustable color.

The invention provides a dimming device. The dimming device comprises a pair of oppositely arranged transparent conductive base layers and a dimming layer arranged between the transparent conductive base layers, the dimming layer comprises a polymer network formed by at least one polymerizable monomer and a liquid crystal composition dispersed in the polymer network, and the dimming layer further comprises at least one dichroic dye; the dimming device has at least one transparent state for transmitting light incident on the dimming device in an electric field, the haze of the transparent state is smaller than or equal to 2%, the dimming device has at least one shielding state for scattering the light incident on the dimming device in a zero electric field, the haze of the shielding state is larger than or equal to 90%, and the dimming device has a working temperature range not narrower than-20 DEG C to 60 DEG C; the method can be applied to the fields of curtain walls, vehicles and the like.

A light control sheet includes: a light control layer including a transparent polymer layer containing domains and a liquid crystal composition filling the domains, the liquid crystal composition containing a liquid crystal compound and a dichroic dye; and a pair of transparent electrode layers sandwiching the light control layer. The light control sheet is configured to change alignment of the liquid crystal compound and the dichroic dye in response to a change in potential difference between the pair of transparent electrode layers, thereby switching from a colored opaque state to a transparent state. The domains have an average diameter of 0.7 μm or less.

The invention relates to the technical field of laser, and discloses a high-power yellow-green laser generation method, which comprises the following steps: generating pump light through a first seed source, and generating signal light through a second seed source; after the pump light and the signal light are mixed through the first wavelength division multiplexer, the pump light and the signal light are combined with the light of the first pump source in the beam combiner, and then are subjected to power amplification through the first ytterbium-doped optical fiber to obtain high-power laser; after collimation by the collimator and color separation by the first dichroic mirror, frequency doubling is carried out by the frequency doubling crystal, and finally, high-power yellow-green laser is output by color separation by the second dichroic mirror. The invention discloses an optical fiber laser for generating high-power yellow-green laser, which reduces the number of core devices in an optical path structure, simplifies the optical path structure and control logic, reduces the hardware cost and assembly debugging cost of equipment, and improves the production efficiency. The stimulated Brillouin threshold value of the laser is effectively improved, broadening in the spectrum amplification process is restrained, and meanwhile the stable and good time-domain characteristic can be kept.

The invention provides a light generating system (1000) comprising a first light source (10), a first quarter wave plate (721), a first polarization based beam director (1510), a reflective polarization maintaining diffuser (710), a first additional light source arrangement (1120), and a light exit (1090), wherein the first additional light source arrangement (1120) comprises a second light source (20), a first dichroic based beam director (1620), a second quarter wave plate (722), and a second polarization based beam director (1520). The light generating system (1000) is configured to generate in an operational mode of the light generating system (1000) system light (1001) comprising diffused first light source light (11d) and diffused second light source light (21d).