731 results about "Optical rotation" patented technology

A head-up display system comprising a transparent plate. A liquid crystal display generates a display light of information with a plane of polarization inclined by about 45.degree. relative to an image plane vertical axis. A first optical rotation layer is disposed on a first surface of the transparent plate, and receives the display light from the liquid crystal display and optically rotates the plane of polarization of the display light by about 90.degree.. A second optical rotation layer is between the image plane of the liquid crystal display and a second surface of the transparent plate, and optically rotates the plane of polarization of the display light by about 45.degree. and allows S-polarized light to emanate toward the transparent plate at Brewster's angle. The S-polarized light is reflected on the second surface and is directed toward an eye of an operator.

Described is a bioprocess for the high-yield production of food flavor-acceptable jasmonic acid and methyl jasmonate, as well as a novel jasmonic acid isomer produced thereby and organoleptic uses thereof. The process yields at least 5% of the "cis" isomer defined according the structure:(wherein R is hydrogen or methyl) or at least 5% of the "cis" isomer defined according to the structure:(wherein R is hydrogen or methyl). Compositions containing at least 98% of the isomer having the structure:with an optical rotation (alphaD20) of +58° are novel. Compositions containing at least 98% of the isomer having the structure:with an optical rotation (alphaD20) of +58° are also novel. The process of our invention comprises the cultivation under aerobic condition of one or more specific strain of Diplodia gossypina in a nutrient medium followed either by (1) isolation of the jasmonic acid product or (2) esterification of the jasmonic acid to form methyl jasmonate followed by the isolation of the methyl jasmonate and novel products produced by such process.

A polarization light splitting film having a light receiving side and a light transmitting side. The polarization light splitting film includes an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized components of a light beam that is incident on the light receiving side and for transmitting the other one of the right and left circular polarization components of the light beam, and a quarter-wave layer laminated over the optical rotation selection layer at the light transmitting side.

The invention relates to optical devices for producing and / or transforming polarised electromagnetic emission by means of anisotropic absorption and / or optical rotation effects and / or birefringence and can be used as different polarizers (dichroic, reflecting), lagging layers (retarders), liquid-crystal displays and indicators and also for producing polarising glass for building construction and for sun and antiglare glasses, masks, aprons and faceplates. The inventive optical device is based on at least one molecularly oriented layer of a low-molecular or oligomeric dichroic material which can form a stable lyotropic liquid crystal structure. The projection of at least one anisotropically absorbing fragment of a molecule of the dichroic material on the surface of the molecularly oriented layer of a dipole moment of optical transition is disposed in a parallel position to the optical axis of the molecularly oriented layer at least within several ranges of wavelength of the electromagnetic emission.

The invention relates to a laser rotary-cut drilling device. The output end of a laser is provided with a beam expander; the output end of the beam expander is provided with a 45-degree total reflection mirror; the output end of the 45-degree total reflection mirror is provided with an optical rotation system; the optical rotation system comprises a first wedge prisma, a second wedge prisma, a third wedge prisma and a fourth wedge prisma; the first wedge prisma and the second wedge prisma have the same wedge angles; the first wedge prisma or the second wedge prisma is connected with a vertical straight-line motion mechanism; the third wedge prisma and the fourth wedge prisma have the same wedge angles; the third wedge prisma or the fourth wedge prisma is connected with a rotation mechanism; the output end of the optical rotation system is provided with a focus lens; and the focus lens is just opposite to a processing platform. The device is used for performing laser rotary-cut drilling on a workpiece, and can process straight holes, variable taper holes and irregular taper holes, so a laser drilling effect of variable sizes, controllable taper and smooth edges is achieved.

The invention relates to a device and a method for measuring synchronous phase shifting interference of a Fizeau quasi-common optical path structure. The device comprises a laser, a half wave plate, a focusing lens, a spatial filter, a circularly polarized light beam splitter (an optically active crystal), a spectroscope, a collimating lens, a reference mirror, a pin-hole diaphragm, an imaging lens, a light splitting and phase shifting system, a computer control system and a CCD camera. According to the device and the method disclosed by the invention, a synchronous phase shifting technology is combined with a Fizeau interference method, so that technical difficulties of a conventional interferometer in poor stability and disability of realizing dynamic measurement are solved; the device and the method are characterized by utilizing an optical rotation effect of the crystal and adding the circularly polarized light beam splitter with a very small splitting angle in the Fizeau interfering structure, so as to realize orthogonally polarized separation of reference lights and test lights in a common optical path. The device and the method disclosed by the invention avoid utilization of a high-quality quarter wave plate in a synchronous phase-shifting interference system, and also greatly decrease a phase measurement error caused by a stress birefrigent effect which exists in an optical element of the system.

The invention discloses a method of utilizing THz-TDS to identify ephedrine with different optical activity. The method mainly utilizes a terahertz time-domain spectrum device to detect the THz fingerprint frequency spectra of the ephedrine hydrochloride with different optical activity in a range between 0.5 and 1.8 THz, and the optical activity of an ephedrine hydrochloride sample can be easily identified through the THz fingerprint frequency spectra. The method has the characteristics of rapidity and lossless detection.

A pointing device includes a wheel module capable of swinging left and right with respect to a housing. With rotation of the wheel and swinging of the wheel module, multiple-dimensional scrolling control is provided. In the wheel module, an optical rotation-sensing module is set beside the wheel to sense its rotation, and an elastic step unit, installed on the wheel module, engages a step-wise uneven ring inside the wheel for generating a stepwise vibration feeling when the wheel is rotated.

The invention discloses an atomic spin precession detection method and device based on circular polarization detection light. The atomic spin precession detection method is based on spinning light characteristics of polarized atoms of an atom air chamber, left circular polarization light and right circular polarization light are formed through double refracted light paths, the left circular polarization light and the right circular polarization light are fed into the atom air chamber, phase position difference in direct proportion to atomic spin precession is generated from left spinning circular polarization light and right spinning circular polarization light of the air chamber, outgoing circular polarization light is fed back along the original path by using a reflection mirror, the left and right spinning directions of the left spinning circular polarization light and the right spinning circular polarization light are switched, the phase position difference is multiplied, the left spinning circular polarization light and the right spinning circular polarization light are interfered according to a circular polarization light interference technique, and thus phase position difference measurement and high-sensitivity detection on atomic spin precession detection are achieved. Atomic spin precession detection can be achieved, and the atomic spin precession detection device is high in precision, sensitivity, and anti-interference capability and small in size. The method and the device are practical, and super high in sensitivity and precision when provided for an atomic spin precession sensor based on atomic spin precession detection.

The invention relates to a method for the modulation diversity of joint codes of an OFDM system. The method leads signal modulation diversity by modulating the rotation of a constellation picture and interlacing components, dispersedly distributes data prepared to be transmitted to different components by rotation modulation and component interlacement so that the data of the different componentsare respectively decayed on a channel to increase superiorities of signal space diversity, then selects an optical rotation angle to maximally enhance transmission property and also leads OFDM frequency diversity and time-frequency interlacement diversity, thereby more effectively enhancing the property of the system. The invention is improved from a previous invention patent application, i.e. a method for the signal diversity of the OFDM system (application number: 2008102264831) and expands an original diversity technique enhancing and improving the transmission property by two-dimensional rotation modulation to a multi-dimensional rotation modulation technique, thereby well utilizing the modulation diversity to be combined with time diversity and frequency domain diversity to enhance the property of the system.

The present invention provides glass containing a base, and an optical film, wherein the optical film contains a vertically polarizing film having a polarizer whose absorption axis is substantially vertically oriented to a film surface, and a π / 2 optical rotation film containing an optical rotator for rotating a vibration direction of linearly polarized light by substantially 90 degrees.

The invention discloses a device for achieving a minitype CPT atomic clock physical system. The device comprises a Bias-Tee, a VCSEL, a first quarter wave plate, an atomic gas chamber, a second quarter wave plate, a polarization beam splitter, a first photoelectric detector and a second photoelectric detector. The invention further discloses a method for achieving the minitype CPT atomic clock physical system. Elliptically-polarized light is adopted for resonance with atom CPT, and difference detection is conducted on the optical rotation effect generated by the resonance. According to the device and method for achieving the minitype CPT atomic clock physical system, background noise generated by optical frequency components which do not interact with atoms in multi-color light output by the VCSEL and conversion noise generated by light interacting with the atoms due to light frequency jitter which is converted into signal amplitude jitter through action with the atoms are eliminated, and the signal to noise ratio of CPT resonance signals is greatly increased; in addition, the device and the method further have the advantages that the influence on the obtained CPT resonance signals by environment magnetic field intensity fluctuation is small, and laser frequency stabilization can be easily achieved through an achieved atomic clock.

A spectroscopic ellipsometer or polarimeter system having a source of a polychromatic beam of electromagnetic radiation, a polarizer, a stage for supporting a material system, an analyzer, a dispersive optics and a detector system which comprises a multiplicity of detector elements, there being apertures before the stage for supporting a material system, and thereafter, the system being present in an environmental control chamber.

An optical control system receives an incident light wave containing a plurality of wavelength components and is capable of giving different spatial light intensity distributions respectively to the wavelength components and of easily changing the color characteristic of an outgoing light wave. The optical control system is applied to illumination systems and light sources for displays, and to a method and an apparatus for process control using such modulated light. The optical control system receives a linearly polarized light wave as an incident light wave 1 containing a plurality of wavelength components, gives different polarization plane rotation angles respectively to the wavelength components by a wavelength dispersion azimuth rotator 3, gives the plane of polarization of the incident light wave 1 an optional optical rotation angle spatial distribution by a spatial light modulator 5, and emit an outgoing light wave containing wavelength components respectively having different spatial light intensity distributions by an analyzer 7.

A Michelson interference type fiber accelerometer comprises a cylinder body, an upper limit pin, a first collimator, an optical coupler, a lower limit pin, a mass block, a second collimator, and an annular magnet; the accelerometer also comprises an optical isolator, a laser light source, a photoelectric detector and a phase demodulation circuit; the mass block is designed as a part of a Michelson interferormeter free space optical path, and is suspended by using a static magnetic repulsion magnetic flux effect, thus converting external acceleration changes into minimal displacement of the mass block; the differential fiber Michelson interferormeter can detect the phase changes caused by the mass block displacements, thus real time demodulating the sensor acceleration changes; the accelerometer uses the magnetic suspension mode to avoid the machinery damping influences, and imports a bireflection Faraday optical rotation structure to eliminate the subordinate fading influences; the Michelson interference type fiber accelerometer is high in sensitivity, good in stability, small in size, simple in making, and has good application prospects.

Holographic recording and reproducing using a compact configuration provides no reduction in the recording / reproducing capability. Information light and recording-specific reference light having a spatially modulated phase are generated and projected onto an optical recording medium coaxially that converge on a reflecting surface of a recording medium. P-polarized recording-specific reference light and S-polarized information light are each optically rotated by a two-way split optical rotation plate in directions different between respective half areas of the cross section of the beam thereof. An interference paffern resulting from interference between information light yet to impinge on the reflecting surface and recording-specific reference light reflected by the reflecting surface and an interference pattern resulting from interference between recording-specific reference light yet to impinge on the reflecting surface and information light reflected by the reflecting surface are recorded in the information recording layer.

The invention relates to a switch panel and a liquid crystal display system for a three-dimensional display device. The switch panel and a light emergent side of a polaroid portrait of the liquid crystal device are arranged in an attaching way; the switch panel comprises two transparent substrates; transparent conductive films are respectively coated on two opposite surfaces of the two transparent substrates; a liquid crystal layer is filled between the two transparent substrates; and oriented films mutually vertical to oriented grooves are respectively arranged on two sides of the two transparent substrate. The other switch panel and the light emergent side of a polaroid portrait of the liquid crystal device are arranged in an attaching way; the switch panel comprises at least one transparent substrate, liquid crystal layers filled between the transparent substrate and the liquid crystal display device, and two transparent electrodes on which driving signals are applied; the oriented films are arrayed along a first mode; and the liquid crystal layers are arrayed along a second mode. The liquid crystal display system comprises the switch panel and polarization analyzing glass which corresponds to the switch panel. The invention adopts a liquid crystal secondary optical rotation technology to achieve three-dimensional image and has simple structure, low cost and favorable imaging effect.

The invention discloses a circularly polarized light separator design method based on artificial microstructure super surfaces. The circularly polarized light separator design method is characterized in that (1) a working wavelength can be selected in a range of from 600(mu)m to 20 (mu)m; and incident ray polarized light is irradiated on the artificial microstructure super surfaces vertically, and phase gradient distribution required by the artificial microstructure super surfaces can be calculated according to outgoing directions of left rotation and right rotation; by taking structural units of every four artificial microstructure super surfaces as a large periodic structure, the period of every structural unit can be calculated; (2) by taking column structures having low working wavelength losses as basic units of the artificial microstructure super surfaces, and concrete specific phase positions can be determined; (3) the corresponding specific realization structure can be designed according to the phase requirement of every basic unit. Under the condition of maintaining the high transmittance low loss, the left rotation component and the right rotation component of the ray polarized light can be symmetrically separated, and by changing the polarization direction of the incident light, the transmission directions of the outgoing left rotation and the outgoing right rotation can be exchanged.

An optical rotation angle of linearly polarized light is modulated to obtain modulated light. The modulated light is passed through an inspection object containing an optically active substance. The optically active substance rotates an optical rotation angle of the modulated light. An intensity of light coming out of the inspection object is measured. Variation in the optical rotation angle of the modulated light is calculated based on the measured intensity and the angle to which the linearly polarized light is modulated. A concentration of the optically active substance in the pulsing component of the inspection object is calculated based on the variation in the optical rotation angle. Thus, concentration of glucose in the blood can be calculated without harming the patient.

The invention discloses a liquid crystal handwriting device which comprises a first base body layer, a first conductive layer, a mixing layer, a second conductive layer, a second base body layer and a substrate, wherein the first base body layer, the first conductive layer, the mixing layer, the second conductive layer, the second base body layer and the substrate are sequentially arranged. The mixing layer comprises a mixture of a cholesterol phase liquid crystal and a macromolecular structure and an optical rotation agent used for controlling the thread pitch of the cholesterol phase liquid crystal. The cholesterol phase liquid crystal is in a first steady state at a power-on moment and is in a second steady state at a pressed moment. When the cholesterol phase liquid crystal is in the first steady state, visible light entering the cholesterol phase liquid crystal in an incident mode is in a white scattered state; when the cholesterol phase liquid crystal is in the second steady state, the visible light entering the cholesterol phase liquid crystal in an incident mode is in a transmitting state, and the visible light sequentially transmits first base body layer, the first conductive layer, the cholesterol phase liquid crystal, the second conductive layer and the second base body layer and enters the substrate in an incident mode. According to the liquid crystal handwriting device, intelligent paper on which words are written without ink is provided and word display reaches the marked effect like the marked effect of black words written on white paper.

The invention discloses an optical rotation angle field detection device based on polarized beam splitting imaging and a measurement method thereof. The device comprises a polarized light generating device, a polarized beam splitting device, a light receiving and imaging device, an image acquisition device and a data processing system, wherein the polarized light generating device emits a bundle of linearly polarized light; the linearly polarized light is vertically incident to the polarized beam splitting device and forms two bundles of linearly polarized light after emergence from the polarized beam splitting device; the two bundles of light are respectively received by the light receiving and imaging device; and then, the light intensity information of the two bundles of light is transferred to the data processing system through the image acquisition device and is processed by the data processing system to obtain an optical rotation angle field. In the invention, the detection process is free from manual adjustment, the operation is simple, and errors caused by manual adjustment can be avoided; a two-dimensional field in a polarization state can be obtained directly by adoptingan imaging and image processing algorithm, the detection result is more visual and accurate and is free from the effect of light source fluctuation.

The invention relates to a temperature drift compensation optical current transformer and a current compensation method thereof, and aims to solve the problem of temperature drift influencing the measurement accuracy of the conventional optical current transformer. The temperature drift compensation optical current transformer further comprises a solenoid self-inductive sensor besides the conventional devices. An optical sensor is connected with the solenoid self-inductive sensor through a polarization maintaining fiber. The solenoid self-inductive sensor is connected with a signal processingunit through a multimode fiber. The signal processing unit is connected with the optical sensor through another multimode fiber. The temperature drift current compensation method comprises the following steps of: representing a Faraday angle of optical rotation generated by the linearly polarized light of the optical sensor by using current to be tested; representing a Faraday angle of optical rotation generated by the linearly polarized light of the solenoid self-inductive sensor by using offset current; deducing an output voltage expression according to an expression for the angle of optical rotation; and performing demonstration to realize the measurement of primary current. The temperature drift compensation optical current transformer and the current compensation method thereof are applied to the current measurement of a power system.

The invention discloses an anti-algae anti-aging fishing net prepared from the following components: polystyrene, polyethylene fibers, nylon fibers, MBS resin, an epoxy resin adhesive film, ethylene glycol dimethacrylate, a calcium carbonate powder, an attapulgite powder, dibutyl phthalate and calcium stearate. The prepared fishing net has simple processing technology; ultraviolet intermittent irradiation treatment is carried out in a process of polyethylene fiber treatment, and the prepared fishing net can be allowed to have extremely strong performance of preventing algae attachment; the nylon fibers have the defects that the nylon fibers have poor optical rotation resistance, are prone to yellowing and have the strength decreased when illuminated for a long time by the sun outdoor, so a hexamethylene diamine and maleic anhydride mixture is adopted for treating the nylon fibers, the problems are solved, and the anti-aging ability of the prepared fishing net is greatly improved; and through addition of the treated attapulgite powder, mechanical properties of the fishing net are improved, and the toughness is enhanced.

The invention provides a Y-waveguide integrated optics phase modulator modulation factor measurement device and method. The device comprises a wide-spectrum light source, a circulator, a Y-waveguide integrated optics phase modulator, a polarization beam splitter, polarization-maintaining delay optical fibers, a Faraday optical rotation reflector, a signal generator, a photoelectric detector and an oscilloscope. The Y-waveguide integrated optics phase modulator modulation factor measurement device and method are of great significance in grasping the optical fiber current transformer transformation ratio temperature error production mechanism and inhibition method and improving temperature environmental suitability and long-term running stability of an optical fiber current transformer.

A rheometric system includes an optical encoder coupled to a rotating shaft and configured to detect a rotational position of the shaft with respect to a reference. The rotational information is forwarded to a program or memory. An optical rotation plate is mechanically fastenable to the rotating shaft. A laser is provided to probe optical properties of a fluid sample proximate to the optical rotation plate. The system includes a detector system for measuring laser light scattered or transmitted through the sample chamber. The detector system is coupled to a memory that stores optical data collected after light impinges on the optical plate. Experimental fluid sample optical data and background optical data are each stored as a data structure that creates a point by point map of rotational position of the sample plate with the optical data collected thereat. A program or routine is provided that can correct point by point along the optical rotation plate the experimental sample optical data using the background optical data.

A polarimeter system integrated into an optical line system includes a transmitter coupled to a transmit filter communicatively coupled to an output port in an optical line device, wherein the transmitter is configured to generate a polarization probe signal, and wherein a wavelength of the polarization probe signal is configured to operate in-service with traffic-bearing channels on the output port; and a polarimeter receiver coupled to a receive filter communicatively coupled to an input port in the optical line device, wherein the polarimeter receiver is configured to vary arrangement of input light from the filter and to measure various outputs of the varied arrangement to derive measurement of State of Polarization (SOP) of the input light.

The invention discloses a novel chiral aggregation-induced emission material and a preparation method and application thereof. The structural formula of the chiral aggregation-induced emission material is as shown in formula (II). The preparation method comprises the following steps: firstly designing and synthesizing a type of novel tetraphenyl ethylene phosphate, wherein the structural formula of the novel tetraphenyl ethylene phosphate is as shown in formula (I), and enabling the tetraphenyl ethylene phosphate to react with (R)-[1,1'-binaphthyl]-2,2'-biformaldehyde so as to generate the novel aggregation-induced emission material with the chiral structure. The chiral aggregation-induced emission material has the good optical property. In a mixed system of tetrahydrofuran and water, an ultraviolet-visible absorption spectrum and a fluorescence emission spectrum of the chiral aggregation-induced emission material are changed along with the change of optical rotation. The material can be stimulated by 451 nm of blue light in the solid state, and emits 520 nm of green light. The solid-state fluorescence quantum yield is 29%. The chiral aggregation-induced emission material can be used as the chiral material applied to the fields, such as a photoelectric device and a biosensor, and has the larger application prospect.

The invention discloses a passive phase modulator for an optical fiber gyroscope. The passive phase modulator for the optical fiber gyroscope comprises two polarization maintaining optical fiber collimators, two Faraday optical rotation devices with opposite rotation directions and a quarter-wave plate; at one end of the phase modulator, polarized light is input in a manner of forming an included angle of 45 degrees with a principal axis of the wave plate, and the polarized direction of the polarized light rotates to be the same with the direction of a fast axis of the wave plate through the polarization maintaining optical fiber collimators and the two Faraday optical rotation devices, then the polarized light enters the other Faraday optical rotation device through the wave plate, and the polarized direction of the polarized light rotates back to be consistent with the incident direction, and finally, the polarized light leaves the phase modulator through the other polarization maintaining optical fiber collimator. In the process, the polarized light diffuses through the fast axis of the wave plate. Similarly, because the optical rotation processes are opposite, the polarized light passing through the phase modulator from the other end diffuses through the slow axis so as to generate a stationary phase difference. In an interference-type optical fiber gyroscope, the passive phase modulator replaces a traditional piezoelectric phase modulator or an integrated optical block modulator, can improve the accuracy and the reliability, and can reduce the cost.