173 results about "Dichroism" patented technology

A light source device has a transparent/scattering state switching element for switching the range of irradiation angles, and liquid crystal molecules and dichroic dye molecules are dispersed in a polymer matrix in the PDLC layer of the transparent/scattering state switching element. The range of irradiation angles can thereby be switched, and the color can be prevented from changing when the radiation angle is switched.

A digital projection apparatus (10) for projection of a multicolor image uniformizes polychromatic light from a light source (20) and provides magnification to the uniformized illumination beam using a base condenser relay (80), providing a reduced numerical aperture for conditioning at a dichroic separator (27). For each monochromatic component color provided from the dichroic separator (27), a reducing relay (82) then demagnifies the illumination beam to provide source illumination to a spatial light modulator (30) at an increased numerical aperture. The modulated beam from the spatial light modulator (30) is then magnified by a magnifying relay lens assembly (28) and directed, at a lower numerical aperture, to a dichroic combiner (26) and to a projection lens (32). As a result, the projection lens (32) has reduced working distance, color shading across the field is minimized, and brightness is optimized.

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 discloses a method for measuring straightness accuracy and positions thereof based on double frequency interference principle. The measuring method adopts an optical laser outputting g cross-line polarized lights, a common spectroscope, a depolarization dispersion prism, a polarization splitting prism, a Wollaston prism, three analyzers, three photodevices and a measurement reflecting mirror comprising a right-angle prism. The measuring method utilizes the dichroism and polarization property of optical devices to make up a double light path measurement structure based on the heterodyne interference principle; the simultaneous measurement of the straightness accuracy and the positions thereof is realized by measuring the optical path difference of the double path, thus having measuring accuracy of the nanometer straightness accuracy and the positions thereof. The method is mainly applied in the motion displacement measurement of an accurate work table, the straightness accuracy detection of an accurate guide rail and the like belonging to fields such as super-precision processing technology, micro-photo dynamoelectric systems, integrated circuit chip manufacturing technology, etc.

The invention aims to provide a circular polarization light board that is thin and having a wide frequency band and a display device equipped with the circular polarization light board. The circular polarization light board is characterized by comprising a substrate, a phase difference layer and a polarized light layer. The birefringence Delta n (Lambda) of light with wavelength Lambda nm of the phase difference layer meets a formula (1) and a formula (2). The phase difference layer and the polarized light layer are both coating layers. The total thickness of the phase different layer and the polarized light layer are below 10 micrometers. Besides, the polarized light layer contains dichroism pigment. Delta n(450)/ Delta n(550)<=1.00(1); 1.00>= Delta n(650)/ Delta n(550)(2).

The invention provides a terahertz-wave asymmetric transmission apparatus based on an artificial electromagnetic material, which comprises a medium layer and double layers of artificial electromagnetic material layers. The medium layer is located between the double layers of artificial electromagnetic material layers; the medium layer is monocrystalline silicon or organic high-polymer medium material and the thickness of the medium layer is micron dimension; the double layers of artificial electromagnetic material layers are located on the surfaces of two side surfaces of the medium layer; the double layers of artificial electromagnetic material layers are composed of basic units of the artificial electromagnetic materials periodically arranged; and the thicknesses of the films are more than 200nm, and each basic unit of the artificial electromagnetic material is a linear, L-shaped or continuously U-shaped metal structure with a certain width. The terahertz-wave asymmetric transmission apparatus disclosed by the invention has strong linear polarization conversion dichroism; asymmetrical transmission of the terahertz linear polarization wave conversion is realized by a dual-layer chiral structure. a terahertz-wave isolator or a terahertz-wave diode can be realized, and the significance on development of a terahertz artificial electromagnetic material function apparatus is achieved.

External light is reflected due to a difference in refractive indices of a black matrix and a glass substrate. When the black matrix is a black resin, there is a difference in refractive indices of the black resin and a first substrate. Also, there is a difference in refractive indices of the colored layer and the first substrate. Therefore, external light is slightly reflected. There is a problem in that the reflected light reduces contrast. A structure in which one polarizing element having dichroism is interposed between a pair of substrates is employed, and a light interference layer is provided between a color filter and a glass substrate, whereby a difference in refractive indices is moderated to reduce light reflection.

The invention discloses a combining system of a super-resolution confocal optical microscope and a scanning probe microscope, wherein laser output by a laser a is focused to a microobjective after being filtered by a dichroism light filter a; the laser output by a laser b enters the microobjective after being filtered by a position-phase plate and a dichroism light filter b in sequence; the laser focused by the microobjective is radiated to a sample table so as to obtain a fluorescent signal of a sample to be tested, and the laser is further focused by the microobjective, collected by a collecting lens a, and subsequently enters a photoelectric detector; a photoelectric signal output by the photoelectric detector is input into an optical signal acquirer; the laser collected by a collecting lens b enters a cantilever of an SPM (Scanning Probe Microscopy) probe; the SPM probe is arranged above the sample table; the light reflected by the SPM probe enters an SPM detector after being collected by the collecting lens b; and an electric signal output by the SPM detector is input into an SPM signal acquirer. The SPM imaging and analysis are guided by the super-resolution optical imaging; as resolution of the super-resolution confocal optical microscope is approximate to the resolution of the SPM, target localization with higher precision can be realized.

The invention relates to the field of biological detection and provides a chiral sensing element and equipment, a chiral representation method as well as a concentration representation method, so that the detection sensitivity of molecular chirality is improved; the equipment and detection cost is reduced, and the detection efficiency and accuracy are improved; meanwhile, high-sensitivity representation of concentration of biological molecules in a solution is realized. The chiral sensing equipment comprises the chiral sensing element, the chiral sensing element comprises an upper covering layer, a middle covering layer and a lower covering layer which have light transmission, as well as a microfluidic channel formed by the upper covering layer, the middle covering layer and the lower covering layer; a chiral nanostructure array is arranged on the lower covering layer in the microfluidic channel. The invention applies to detection of weak circular-dichroism signals.

The invention discloses a light shift elimination method for SERF atomic spin magnetometers; the light shift measurement and elimination method based on the dichroism principle is provided aiming at the problem that sensitivity of the SERF atomic spin magnetometer in measurement may be influence by light shift. According to the light shift elimination method, the deficiency of lack of effective light shift measurement, monitoring and elimination methods is made up, and meanwhile improvement on sensitivity of the SERF atomic spin magnetometer is guaranteed.

The invention relates to a naphthalimide fluorescent dichroic dye containing an aromatic ester group and an application thereof, belonging to the field of display materials. In the naphthalimide fluorescent dichroic dye containing an aromatic ester group, naphthalimide is used as the parent body, and an ester group is introduced to 4-site to be directly connected with the parent body so as to achieve negative fluorescent dichroism. The dye has the advantages of novel structure, easy acquisition of raw materials and simple synthesis method. Tests show that this series of dye emits vivid blue fluorescence, the maximum emission wavelength is 405nm, the fluorescence quantum yield is 0.44-0.70, better dichroism can be indicated in liquid crystal MLC6237-01 epsilon, the absorption order parameter is -0.20- -0.23, the dichroic ratio is 2.0-2.3, the fluorescent order parameter is -0.37- -0.38, and the fluorescent dichroic ratio is 5.2-5.7.

A method for manufacturing a polarizer of the invention, wherein the polarizer comprises a film that comprises: a matrix made of an optically-transparent resin containing a dichroic absorbing material; and minute domains that are made of an energy ray-curable birefringent material having liquid crystalline properties and are aligned and dispersed in the matrix; and comprising a process of applying energy rays for fixing the alignment of the birefringent material having liquid crystalline properties. A polarizer obtained by the method has a high transmittance and a high polarization degree, and being able to control unevenness of the transmittance in the case of black viewing.

The invention provides a laser far field focal spot measurement method based on orthogonal light wedge dichroism and a focal spot reconstruction algorithm. A measurement apparatus used in the method comprises a pair of orthogonal light wedges, a focusing lens, a CCD imaging device and a computer system. Beam splitting is performed to an incident laser beam through two light wedge device whose wedge angle directs to a mutually orthogonal direction and the incident laser beam is converged through the focusing lens. After that, the incident laser beam forms sub-spot array with successively damped peak strength on a CCD photosensitive surface in a lens plane. An effective method is used to carry out splicing fusion on each of the measured sub-spot. And finally, complete laser far field focal spot intensity distribution can be obtained through reconstruction. According to the invention, CCD dynamic measurement range can be greatly developed; a lot of high-frequency side-lobe information of the actual focal spot can be extracted from CCD background noise so that accurate measurement and light beam quality evaluation can be possibly achieved.

The invention relates to an aeromagnetic field vector detecting device and a detecting method, a DFB laser which has the same lasing frequency with an alkali metal atom D1 wire is adopted as a pump light source, the light emitted by the DFB laser generates circular polarization pump light polarized alkali metal atoms with free adjustable laser power through an optical isolator, an optical attenuator, a polarizer and a lambda/4 wave plate, and the atom is made to have macroscopic magnetic moment. A detected weak magnetic field in a y axis direction makes the magnetic moment to generate Larmor precession on an xoz plane around the y axis. The polarization plane rotation of the linearly polarized light caused by circular dichroism of a polarized atom, the pump light is removed, the deflection angle gradually vibrates and attenuates to zero, a zero-cross detection device is adopted to detect the time difference between the time of removing the pump light and the first zero crossing point, the Larmor prescession frequency can be obtained, and a magnetic-field vector value is obtained by dividing the Larmor prescession frequency by a gyromagnetic ratio. According to the invention, the device and the method have the advantages of high magnetic-field vector detection precision, fast response frequency and good repeatability, and are suitable for aeromagnetic field vector detecting mobile platform magnetic measurement.

The present invention relates to a dye based circularly polarizing film for organic light emitting diodes, which includes a polarized light film made of polyvinyl alcohol and 1/4 wave plate, characterized in that, the polarized light film is color dyeing and spreading through configuring a high dichroism dye. In the absorption wavelength region 500-640 nm, the principal absorption wavelength bandwidth is 80-120 nm and the average monolithic transmittance is 53 -59% in the visible wavelength 380-780 nm. Utilizing the characteristic of the photopic vision phenomena and the green light having the highest luminous efficiency in the OLED tricolor, the color polarized light film is used to confine the wavelength 500-640 nm and replaces the film with no reflection that restrains the full wavelength of the visible light, so the circular polarization sheet which has the contrast with no evident depress is produced and the external quantum efficiency is improved by 25-37%. Jointed on one side of the cellulose triacetated film of the two sides of the polarized light film, anti dazzle or low reflective coating or the film having the two functions, is used to improve the contrast. The invention can improve the luminous efficiency, reduce the electric power consumption and advance the life of the OLED.

An optical film in which a function of a brightness enhancement film is maintained and variations in brightness and chromaticity within a film plane are suppressed is provided. An optical film is a laminate of an absorptive dichroic polarizing plate and a brightness enhancement film. A maximum chromaticity difference Δxy(max) of in-plane transmitted light is 0.008 or smaller after the optical film is attached to a glass plate and allowed to stand at 70° C. for 120 hours. The brightness enhancement film includes a layer having a circularly polarized light separating function, and a quarter wavelength plate. The quarter wavelength plate is a film showing an in-plane retardation (Δnd) satisfying Δnd(450 nm)/Δnd(550 nm)<1.02 or a film containing a polymer having a photoelastic coefficient of 40×10⁻¹² m²/N or smaller.

The invention discloses a laser direct writing device based on a combined vortex double focusing light spot. The laser direct writing device mainly comprises a 405 nm blue light etching light path, a 650 nm red light self-focusing servo light path, a control computer and a relevant control feedback system, wherein the 405 nm blue light etching light path mainly comprises a circular polarization lens group, a 1/2 wave plate, an electric control rotating platform, a spatial light modulator, a confocal lens group, a dichroism beam splitter, a focusing objective, a self-focusing servo driver, an electric control two-dimensional movement platform and the like; the 650 nm red light self-focusing servo light path mainly comprises a red light collecting lens, a cylindrical mirror and a four-quadrant detector. The laser direct writing device is characterized in that a combined vortex phase modulation is added in an entrance pupil of a conventional laser direct writing light loath focusing objective, thereby achieving double focusing light spot intensity distribution at an objective focusing rear field. The double focusing light spot is capable of achieving hundred-nanometer-order transverse resolution under the medium-numerical aperture focusing, and has a micrometer-order axial focal depth under the medium-numerical aperture focusing.

A measuring system for measuring the dichroism of the magneto-optical circular polarization with adjustable measuring geometry is provided, whose structure is that: a femtosecond laser excites the white light of the ultra-continuous spectrum, and divides the light by a monochrometer, which forms a monochromatic light whose wavelength can be adjustable. The monochromatic light can polarize through a purified Glan-Taylor prism with the extinction coefficient of 10 <5>; a lantern fly modulator, whose optical axis is 45degree angled with the optical axis of the Glan-Taylor prism to make the light become the circularly polarized light with the alternative variation of the sinistrality and the dextrorotation; a sample, which is put on the center of the cryogenic magnet; The circularly polarized light focuses on the sample, and the reflex reflected from the sample is focuses on the first LED detector; a phase-locking amplifier, whose reference signal is provided by the lantern fly modulator used for testing the difference of light intensity between the sinistrality and the dextrorotation of the circularly polarized light. The invention can not only test the frequency spectrum of the dichroism of the magneto-optical circular polarization of the materials, magnetic density and temperature dependence, but also can test the magnetocrystalline anisotropy of the magnetic semiconductor.

The system is composed of the laser oscillator in femtosecond level, the pulse stretcher of grating pair, the pulse shortener of grating pair, the beam splitter, the first stage OPA amplifier, the back stage OPA amplifier, the prime amplifier of pump source system, the first double frequency crystal, the dichroism spectroscopic plate etc. the characters of the invention are that the signal light and the pump light source are come from the same laser oscillator. The accurate time synchronization between the signal light pulse and the pump light pulse can be realized and the time jitted is reduced without need of the additional collimation light source. That is to say the signal light of each optical parameter amplification stage and the pump light can be collimated and synchronous adjusted.

Thin-type circular polarization light panel with excellent reflective property, a making method of the circular polarization light panel, and a display device provided with the circular polarization light panel are provided in the invention. The circular polarization light panel and (continuous) making method are provided, and the display device provided with the circular polarization light panel and display elements like an organic EL display element is also provided. The circular polarization light panel is characterized in that a liquid crystal phase difference layer formed by compositions is formed by the liquid crystal phase difference layer containing polymerism liquid crystal composition, a phase difference layer is formed by phase difference film formed by stretching polymeric membrane, a polarized light layer is formed by compositions formed by polarized light layers containing dichroism pigmental, and the three layers are arranged in such a sequence.

A metasurface circularly-polarized light detection component comprises a light-permeable substrate and rotationally symmetric chiral medium structural units arrayed on the light-permeable substrate; each rotationally symmetric chiral dielectric structural unit is composed of two pairs of dielectric arms crossed; a gap is formed between every two rotationally symmetric chiral dielectric structuralunits. The metasurface circularly-polarized light detection component may be made by means of electron beam lithography and photolithography, reactive ion etching and other processes. The metasurfacecircularly-polarized light detection component has great circularly-polarized dichroism, and can distinguish circular polarization states; the circularly-polarized dichroism is up to 96.8% at 1.75 mum; the metasurface circularly-polarized light detection component has excellent properties and is highly worthy of application in optical sensing systems, advanced nan photonic devices and integratedoptical systems.

The invention discloses a measuring system for enhancing the dichroism signal of the magnetic circular polarization and improving the speech to the noise ratio. The system comprises an optical source, a monochromator, a first convex lens, a Wollaston prism, a photoelastic modulator, a photoelastic modulator controller, a second convex lens, a temperature changing magnetic body system, a detecting device and a lock-in amplifier. By using the invention, a measuring signal is enhanced and the speech to the noise ratio is improved; meanwhile, the relation between the dichroism signal of the magnetic circular polarization and an external magnetic field can be measured, and be corresponding to SQUID measured magnetic hysteresis loop; the relation between the dichroism signal of the magnetic circular polarization and the temperature also can be measured, and be corresponding to the temperature dependence of SQUID measured saturation magnetization or residual magnetization, and the curie temperature of a ferromagnetic of material can be confirmed; the dependency of the luminous energy of the dichroism signal of the magnetic circular polarization can be measured, to confirm the energy band structure of material.