32 results about "Liquid-crystal laser" patented technology

We describe a wide band variable transmission optical device having an electronically active cell comprising a guest-host mixture of a liquid crystal host and a dichroic guest dye material contained between a pair of plastic substrates. The liquid crystal host has an axis orientation that is alterable between a clear state orientation and a dark state orientation and the dichroic guest dye material includes one or more dichroic dyes. The optical device is characterized in that it exhibits a wide absorption band that is greater than 175 nm within a visible wavelength range of 400-700 nm, has a clear state transmission equal to or above 30% and a dark state transmission equal to or below 40%.

The patent refers to one or more droplets of chiral liquid crystals used as point source(s) of laser light. The source is shaped as a droplet of chiral liquid crystals (1) and an active medium preferably dispersed in the liquid crystals. The source is spherical and with a size of preferably between a few nanometres and 100 micrometres. A droplet consists of chiral liquid crystals (1) that have selective reflection in the range of the active medium's emission and can be cholesteric liquid crystals, a mixture of nematic liquid crystals and a chiral dopant or any other chiral liquid-crystal phase, preferably the blue phase, the ferroelectric phase, the antiferroelectric phase, any of the ferrielectric phases or another chiral phase of a soft substance, that need not be chiral by itself.

The invention relates to a laser frequency stabilization and power stabilization optical path system for an SERF atomic gyroscope. The system comprises two parts: a saturated absorption frequency stabilization system, and a liquid crystal laser power stabilization and beam shaping system. The saturated absorption frequency stabilization system is used for performing frequency stabilization on pumping light of the SERF atomic gyroscope, and a liquid crystal laser power stabilization system is used for performing power stabilization on the pumping light of the SERF atomic gyroscope, wherein a flat top beam shaping module is used for shaking a laser spot, so that the laser spot changes from laser with Gaussian distribution energy into flat top laser with uniform energy distribution. The laserfrequency stabilization and power stabilization optical path system provided by the invention is reasonable in optical path layout, compact in structure, convenient to install and adjust, and simplein experimental operations, and provides a basis for the development of a high-precision miniaturized SERF atomic gyroscope.

The invention provides a liquid-crystal tunable laser with echo wall mode and distribution feedback emission and a preparing method thereof, and belongs to the technical field of tunable lasers. The liquid-crystal tunable laser with echo wall mode and distribution feedback emission comprises a capillary tube glass matrix, light-control alignment films, cholesteric liquid crystals and laser materials. The light-control alignment films are arranged on the inner side of the capillary tube glass matrix and are arranged in an axial-symmetry mode, and the cholesteric liquid crystals and the laser materials are arranged in defined space. According to the liquid-crystal tunable laser, laser emission of dye-doped cholesteric liquid crystals is achieved in the capillary tube glass matrix, and emission considers distribution feedback laser emission and echo wall mode laser emission at the same time; structural parameters such as the inner diameter of a capillary tube, the thickness of the light-control alignment films and the dye-doped cholesteric liquid crystals are optimized, the emission efficiency of the cholesteric liquid crystal laser can be improved, and the liquid-crystal tunable laser has the quite-good temperature-tunable characteristics.

The invention belongs to the technical field of optical lasers, and specifically relates to a liquid crystal photonic crystal fiber random laser and a manufacturing method therefor. The invention provides the liquid crystal fiber laser with a function of controlling the random laser emitting direction. According to the invention, the aqueous solution of cholesteric liquid crystal which is doped with a laser dye and mixed with polyvinyl alcohol is injected into a photonic crystal fiber, and the liquid crystal laser which can control the random laser emitting direction can be constructed through the light transmission characteristics of the photonic crystal fiber. Therefore, the conventional random laser emitting direction can be controlled, thereby improving the laser intensity of the photonic crystal fiber to a great extent.

The invention belongs to the technical field of tunable lasers, and particularly relates to a wide tuning range dye doping cholesteric liquid crystal laser and a preparation method thereof. The wide tuning range dye doping cholesteric liquid crystal laser comprises an upper glass substrate 1, a circular ring indium tin oxide conductive thin film 2, a cholesteric liquid crystal 3, a laser dye 4, a spacer 5, a disk-shaped indium tin oxide conductive thin film 6 and a lower glass substrate 7. The wide tuning range dye doping cholesteric liquid crystal laser is characterized in that the upper glass substrate and the lower glass substrate are vertically opposite. By the aid of a coaxial disk-circular ring electrode structure, structural parameters such as the thickness of a box, the size of an electrode and the dye doping cholesteric liquid crystal are optimized to obtain a tunable liquid crystal laser structure with a simple manufacturing process and a wide tuning range, and electric field tuning characteristics are effectively realized.

The invention discloses an electric control liquid crystal laser shaping chip based on wave front adjustment. The chip comprises a cylindrical liquid crystal phase modification framework, wherein the liquid crystal phase modification framework comprises a liquid crystal material layer, a first liquid crystal initial alignment layer, an imaging electrode layer, a first substrate and a first antireflection film which are arranged on the upper surface of the liquid crystal material layer in sequence, and a second liquid crystal initial alignment layer, a common electrode layer, a second substrate and a second antireflection film which are arranged on the lower surface of the liquid crystal material layer in sequence; the common electrode layer is composed of a homogeneous conducting film; the imaging electrode layer is composed of a circular conducting film and at least one circular ring-shaped conducting film concentrically arranged on the periphery of the circular conducting film, and the circle center of the circular conducting film coincides with the axis of the liquid crystal phase modification framework; when a plurality of circular ring-shaped conducting films are arranged, the radial widths of all circular ring-shaped conducting films are equal, and the radial space of adjacent conducting films is equal. The chip is large in laser beam shaping variation range, good in adaptability and small in size and mass, and is easily coupled with other optical and optoelectronic mechanical structures.

The invention discloses an ultrahigh-polarity chiral liquid crystal material, a liquid crystal laser and a preparation method of the liquid crystal laser. Cholesteric liquid crystals with ultrahigh dielectric constants (epsilon-104) and ultrahigh polarity are obtained by doping polar nematic liquid crystals with chiral molecules. The material is different from common cholesteric liquid crystals, retains an ultra-strong nonlinear optical effect, and can excite high-strength second harmonics (ten times or more of quartz crystals). Based on the amplification effect of cholesteric phase periodicity on laser, the material can be applied to the fields of laser high-order frequency multiplication modulation, harmonic imaging and the like. The cholesteric phase molecular pitch is tuned through theconcentration of a chiral agent, so that the continuous regulation and control of the reflection wavelength of 100-1000 nm are realized. Meanwhile, the material has the characteristic of low temperature sensitivity, and is beneficial to stable optical signal output of the device in a wide temperature range.

The invention discloses a polymer cholesteric liquid crystal laser and a production method thereof, and optical equipment. The polymer cholesteric liquid crystal laser comprises a laser main body, and the laser main body comprises a light-transmitting conductive substrate, a polymer cholesteric liquid crystal layer, a precious metal reflecting layer and a resonant cavity unit. A parallel orientation layer is arranged on the light-transmitting conductive substrate; the polymer cholesteric liquid crystal layer is arranged on the surface of the parallel orientation layer; the precious metal reflecting layer and the polymer cholesteric liquid crystal layer are oppositely arranged at an interval; the resonant cavity unit is clamped between the precious metal reflecting layer and the polymer cholesteric liquid crystal layer; and the resonant cavity unit is filled with planar optical waveguides, the planar optical waveguides comprise perovskite quantum dot layers and transparent separation layers, and the transparent separation layers are arranged on the two surfaces, facing the polymer cholesteric liquid crystal layer and the precious metal reflection layer, of the perovskite quantum dot layers respectively. Through the structural design, the polymer cholesteric liquid crystal laser is low in laser threshold, high in radiation intensity and good in repeatability.

The invention discloses a multi-primary-color laser array side-entry light homogenizing surface light source of a liquid crystal display, and belongs to the technical field of laser optical display. The light homogenizing surface light source comprises a visible light semiconductor laser, a light beam shaping device and a liquid crystal display light guide plate, the visible light semiconductor laser forms a multi-primary-color laser array in the backlight source of the side-entry liquid crystal laser display, and laser beams with the light intensity in Gaussian distribution emitted by the multi-primary-color laser array are converted into laser beams with the light intensity in flat-topped distribution by the beam shaping device and then enter the light guide plate. And the light intensity distribution uniformity of the flat-topped laser beams on the light incident surface of the light guide plate is greater than 50%. According to the invention, color spots, color blocks, bright and dark stripes and non-uniform color temperature caused by non-overlapping of the multi-primary-color laser array side in the light guide plate of the liquid crystal display can be eliminated, so that auniformly distributed white light field is obtained.

Devices and method of fabrication a liquid crystal electro-optic device which is based on light scattering and diffraction from a multiple domain field-effect liquid crystal configuration are provided. The multiple domains include random liquid crystal alignment directions fabricated by photo-alignment and have sizes ranging from sub-micrometer to several micrometers. The random alignment in the plane can be of two or more directions whereas the pretilt angle can vary between zero and 90°. The randomness of the planar directions of the liquid crystal director can be generated by a designed photo mask in combination with uniaxial photo-alignment.

The present invention provides a tunable terahertz (THz) wavelength selector device, which includes a fixed phase retarder, a tunable phase retarder and a pair of linear polarizers to form a unit. The fixed phase retarder and tunable phase retarder basically utilizes liquid crystals to provide phase retardation, moreover, utilizing birefringence phenomenon possessed by liquid crystals can provide adequate phase retardation. The fixed phase retarder utilizes horizontal orientation of liquid crystal cell to provide fixed phase retardation, while the tunable phase retarder however utilizes homeotropic liquid crystal cell and a rotatable magnet to provide a tunable phase retardation, wherein the tunable phase retarder can provide the positive or negative phase retardation relative to the fixed phase retarder, based on the direction of the magnet's rotating axes and totally use the entire tunable range into adjusting frequencies which can pass through. Besides, the present invention can also serially connect multiple units described above so as to achieve a narrow enough band-pass bandwidth.

The invention discloses a preparation method of carbon black doped liquid crystal microcapsules, and belongs to the technical fields of fine chemical engineering and material science. The carbon blackdoped liquid crystal microcapsule is characterized in that a liquid crystal is doped with modified carbon black which exists in the microcapsules for absorbing transmitted visible light, so that thetransmitted light penetrating through the liquid crystal is reduced, human eyes mainly see selectively-reflected light of the liquid crystal, and liquid crystal microcapsules are more remarkable in color. The method is easy to operate, and is environmentally friendly. The liquid crystal microcapsules prepared by the method are remarkably improved in brightness, can present remarkable color under naked eyes, and can be widely applied in the fields of body temperature precise measurement, liquid crystal displays, electronic paper, liquid crystal lasers, anti-counterfeit packages and smart textile.

The invention provides an automatic addressing laser scanning electrode structure comprising a substrate. A liquid crystal layer is arranged above the substrate, an electrode control array panel is arranged above the liquid crystal layer, and a plurality of conductive driving electrodes are arranged on the electrode control array panel, so that the on-off state and the applied voltage of each driving electrode can be independently controlled; and the driving electrodes are respectively connected with a master controller. The invention provides an effective laser deflection technical scheme capable of being regulated and controlled in real time, pixel-level control can be set for the electrode control array, high-precision pixel control is achieved, so that the multifunctional liquid crystal laser scanning device capable of regulating and controlling the deflection angle at any time is achieved.

The invention discloses a blue phase liquid crystal film, and a preparation method and an application thereof. The blue phase liquid crystal film comprises the following components: 30 wt% of polymerizable liquid crystal monomer C6M, 59.5 wt% of liquid crystal molecules HTG135200-100, 2.9-3.7 wt% of a chiral dopant, 5 wt% of a crosslinking agent, 0.2-2 wt% of a photoinitiator, and 0.5-2 wt% of a small molecule dye. Since the blue phase state is affected by the polymerizable liquid crystal monomer C6M, the blue phase liquid crystal film prepared by adopting the preparation method is in a solidstate, and its morphology is relatively stable, so that the blue phase can be maintained in a very wide temperature range. Further, the influence of the thermal effect caused by the pump light on thetemperature of a liquid crystal laser device cannot affect the phase state of the blue phase liquid crystal, thus the wavelength stability of the laser device is greatly improved when the blue phase liquid crystal film is used as the laser device.

The invention discloses a liquid crystal laser display panel and a construction method thereof. The panel includes a periodically arranged RGB pixel array, the RGB pixel array includes a polymer micro-template and a liquid crystal microstructure; the polymer micro-template serves as a blank pixel, and the liquid crystal micro-structure is located inside the polymer micro-template ; Wherein, the liquid crystal microstructure includes liquid crystal material and organic laser dye molecules. The liquid crystal micro-laser pixel array has the characteristics of periodic arrangement, which is easy to realize color-mixed laser output, and easy to realize full-color laser display under a specific excitation mode.

The invention discloses an electric control liquid crystal laser shaping chip based on wave front adjustment. The chip comprises a cylindrical liquid crystal phase modification framework, wherein the liquid crystal phase modification framework comprises a liquid crystal material layer, a first liquid crystal initial alignment layer, an imaging electrode layer, a first substrate and a first antireflection film which are arranged on the upper surface of the liquid crystal material layer in sequence, and a second liquid crystal initial alignment layer, a common electrode layer, a second substrate and a second antireflection film which are arranged on the lower surface of the liquid crystal material layer in sequence; the common electrode layer is composed of a homogeneous conducting film; the imaging electrode layer is composed of a circular conducting film and at least one circular ring-shaped conducting film concentrically arranged on the periphery of the circular conducting film, and the circle center of the circular conducting film coincides with the axis of the liquid crystal phase modification framework; when a plurality of circular ring-shaped conducting films are arranged, the radial widths of all circular ring-shaped conducting films are equal, and the radial space of adjacent conducting films is equal. The chip is large in laser beam shaping variation range, good in adaptability and small in size and mass, and is easily coupled with other optical and optoelectronic mechanical structures.

The invention belongs to the technical field of optical lasers, and specifically relates to a liquid crystal photonic crystal fiber random laser and a manufacturing method therefor. The invention provides the liquid crystal fiber laser with a function of controlling the random laser emitting direction. According to the invention, the aqueous solution of cholesteric liquid crystal which is doped with a laser dye and mixed with polyvinyl alcohol is injected into a photonic crystal fiber, and the liquid crystal laser which can control the random laser emitting direction can be constructed through the light transmission characteristics of the photonic crystal fiber. Therefore, the conventional random laser emitting direction can be controlled, thereby improving the laser intensity of the photonic crystal fiber to a great extent.

The patent refers to one or more droplets of chiral liquid crystals used as point source(s) of laser light. The source is shaped as a droplet of chiral liquid crystals (1) and an active medium preferably dispersed in the liquid crystals. The source is spherical and with a size of preferably between a few nanometres and 100 micrometres. A droplet consists of chiral liquid crystals (1) that have selective reflection in the range of the active medium's emission and can be cholesteric liquid crystals, a mixture of nematic liquid crystals and a chiral dopant or any other chiral liquid-crystal phase, preferably the blue phase, the ferroelectric phase, the antiferroelectric phase, any of the ferrielectric phases or another chiral phase of a soft substance, that need not be chiral by itself.

The invention discloses a liquid crystal laser display panel and a construction method thereof. The panel comprises an RGB pixel array which is periodically arranged, wherein the RGB pixel array comprises a polymer micro-template and a liquid crystal micro-structure; the polymer micro-template is used as a blank pixel, and the liquid crystal micro-structure is located in the polymer micro-template; the liquid crystal micro-structure comprises a liquid crystal material and organic laser dye molecules. The liquid crystal micro-laser pixel array has the characteristic of periodic arrangement, sothat mixed-color laser output is easy to realize, and full-color laser display is easy to realize in a specific excitation mode.

We describe a wide band variable transmission optical device having an electronically active cell comprising a guest-host mixture of a liquid crystal host and a dichroic guest dye material contained between a pair of plastic substrates. The liquid crystal host has an axis orientation that is alterable between a clear state orientation and a dark state orientation and the dichroic guest dye material includes one or more dichroic dyes. The optical device is characterized in that it exhibits a wide absorption band that is greater than 175 nm within a visible wavelength range of 400-700 nm, has a clear state transmission equal to or above 30% and a dark state transmission equal to or below 40%.

The invention relates to an optical path system for laser frequency stabilization and power stabilization of a SERF atomic gyroscope. The system includes two parts: a saturated absorption frequency stabilization system and a liquid crystal laser power stabilization and beam shaping system. The saturated absorption frequency stabilization system is used to stabilize the frequency of the pumped light of the SERF atomic gyroscope, and the liquid crystal laser power stabilization system is used to stabilize the power of the pumped light of the SERF atomic gyroscope. Shaping, so that it changes from a laser with Gaussian energy distribution to a flat-top laser with uniform energy distribution. The invention has reasonable optical path layout, compact structure, convenient installation and adjustment, and simple experimental operation, which provides a basis for the development of high-precision and miniaturized SERF atomic gyroscopes.

The invention discloses a wide-band liquid crystal laser protection material prepared by multi-point click chemistry and a preparation method thereof, 2, 6-dihydroxy anthraquinone is used as a basis, and esterification reaction, sulfydryl click reaction, [2 + 2] cycloaddition-cyclic splitting click reaction and azido alkyne 1, 2-dihydroxy anthraquinone are carried out to prepare the wide-band liquid crystal laser protection material. The liquid crystal laser protection material capable of absorbing broadband spectrums is prepared through a 1, 3 dipole cycloaddition click reaction and the like, the preparation method is simple, convenient and efficient, the product yield is high, purification is easy, no by-product is generated, and the preparation method is an ideal preparation mode; the prepared anthraquinone derivative is excellent in property, wide in absorption wave band and high in absorption capacity, the maximum absorption wavelength can be changed due to changes of groups and side groups, the absorption wavelength range is expanded, and the anthraquinone derivative has liquid crystal properties, is more flexible in application and has great application value.

The invention relates to a tunable liquid crystal laser based on an SU8 grating and a manufacturing method thereof. The tunable liquid crystal laser based on an SU8 grating includes ITO glass substrates, an SU8 grating, a chiral liquid crystal and an AC power supply. The tunable liquid crystal laser based on an SU8 grating is characterized in that a liquid crystal laser component is arranged in the SU8 grating to obtain side radiation which is parallel to the direction of the ITO glass substrates, thus being easy for integration; each channel of the SU8 grating between the two ITO glass substrates is equal to an independent laser resonant cavity, so that the plurality of channels radiates laser at the same time to greatly improve the intensity of the emitted laser; the alternating voltageare applied to upper and lower ITO glass substrate electrodes by the AC power supply, thus forming an electric field perpendicular to the helical axis of the chiral liquid crystal; under the action ofthe electric field, the orientation of the chiral liquid crystal molecules changes, and the screw pitch slowly changes, thus achieving the effect of stable wavelength tuning output; and the method for tuning the output wavelength by means of the electric field is convenient and quick, and can avoid damaging spiral arrangement of the chiral liquid crystal molecules to cause the exiting laser to beturned off. The tunable liquid crystal laser based on an SU8 grating is applied to the fields, such as plane display, optical coding and detection sensing.

The invention discloses a polymer-stabilized liquid crystal laser and a preparation method and equipment thereof. The polymer stabilized liquid crystal laser comprises a laser main body, wherein the laser main body comprises a first light-transmitting conductive layer; a second light-transmitting conductive layer, arranged opposite to the first light-transmitting conductive layer; and a resonant cavity unit, located between the first light-transmitting conductive layer and the second light-transmitting conductive layer, and the resonant cavity unit being filled with perovskite quantum dot polymer stable liquid crystals. The polymer-stabilized liquid crystal laser provided by the embodiment of the invention at least has the following beneficial effects that the perovskite quantum dots in the polymer-stabilized liquid crystal have relatively high fluorescence quantum yield, and the fluorescence quantum yield can reach 50-100%. The extremely high fluorescence quantum yield enables ASE to be more easily generated, correspondingly, laser emission is more easily generated, and therefore higher emission intensity and a lower laser threshold value are further achieved.

The invention discloses a two-dimensional liquid crystal laser deflector. The two-dimensional liquid crystal laser deflector comprises multiple layers of devices which are sequentially stacked, and each layer of device sequentially comprises an upper substrate, a liquid crystal molecular layer and a lower substrate; each upper substrate sequentially comprises upper substrate glass, an upper ITO conducting layer and an upper orientation layer from top to bottom, and each lower substrate sequentially comprises a lower orientation layer, a lower ITO conducting layer and lower substrate glass from top to bottom; the liquid crystal molecular layer is located between the upper substrate and the lower substrate, and spacers are sprayed in the liquid crystal molecular layer for supporting; the edge of the upper substrate and the edge of the lower substrate are sealed and packaged through frame glue and are attached and cured in an aligned mode. According to the invention, the deflection angles theta x and theta y of emergent light in the x and y directions can be adjusted by changing the widths dx and dy of the sub-regions in the x and y directions, changing the thickness of the liquid crystal molecular layer and changing the magnitude of the loading voltage so as to realize two-dimensional space scanning of light beams, and the two-dimensional liquid crystal laser deflector has the advantages of high deflection precision, high response speed, simple driving control and simple structure.

The invention discloses a laser rotating swinger system which comprises a gradient liquid crystal laser swinger, a laser detector, a clamp holder and a remote controller. The gradient liquid crystal laser swinger comprises a swing body mechanism, and the swing body mechanism comprises a fixing plate, a prism table, a laser head, a prism, a rotating assembly, an X-axis power assembly and a Y-axis power assembly. The laser detector comprises a first long bubble, a second long bubble and a first display screen, the first display screen is provided with a receiving window, a middle indicator light, an upper indicator light and a lower indicator light, and the receiving window is provided with a central red line; the circuit board is provided with a solar photoelectromagnetism, a single chip microcomputer and a control circuit, the single chip microcomputer is provided with four AD conversion ports, the control circuit is provided with four signal acquisition channels, and the AD conversion ports are connected with the signal acquisition channels. According to the invention, an inclined plane can be scanned through digital setting, four signal acquisition channels are adopted, two signal acquisition channels are used for acquiring farther laser rays, two signal acquisition channels are used for acquiring closer laser rays, farther laser rays can be received, and the anti-interference capability is enhanced.