194 results about "Radial polarization" patented technology

The invention provides a generation device of an arbitrary polarization distribution vector light beam, and is in turns provided with a spatial light modulator controlled by a computer, a first lens, a wave filter, two quarter wave plates, a second lens and a Rochi grating along the light direction of the light source producing linearly polarized light. The spatial light modulator is positioned on a front focal plane of the first lens, a back focal plane is provided with the wave filter, and the wave filter is synchronously positioned on a front focal plane of the second lens. Rochi grating is positioned on a back focal plane of the second lens. Two quarter wave plates are placed by closely depending on the backlight source surface of the wave filter. The invention has the advantage of producing arbitrary vector light beam, and to be important, the device of the invention can produce the vector light beam in real time and dynamic manner. Moreover, the device greatly reduces the effect to the light beam quality caused by coherent noise, and can produce the high-quality vector light beam, and the producing manner is real time and dynamic.

The present invention provides an intertial-type voice actuator that includes a magnetic flux conductive material core with a continuous channel. The channel has antifringing groove. The actuator employs a radially polarized cylindrical magnet spaced in the channel to form a magnetic gap and a conductive coil positioned at least partially in the gap. A multi-component suspension system provides high quality sound using an antifriction bearing, a viscous magnetic fluid, and a spider suspension. The inertial-type actuator is completed by an integrated mounting apparatus. In one embodiment, a receiver and an output disk are interlocked by helical wedges and the actuator is mounted on a soundboard. In another embodiment, a special receiving cavity is attached to a wall stud for intrawall installation. The cavity is equipped with longitudinal electrical contacts so that the actuator can move and still be connected. After the actuator is inserted, the wall covering is installed.

The invention belongs to the technical field of optical precision measurement, relating to super-resolution laser polarization differential confocal imaging method and device. The method improves the transverse resolution power by combining a radial polarized light and a pupil filtering technology, improves the axial resolution power by using a differential subtraction detection technology of an axial-offset dual-detector system and remarkably improves the spatial resolution power and tomography ability of the system. The device comprises a laser source as well as a beam expander, a polarization state modulation system, a pupil filter and a spectroscope which are sequentially arranged at a transmitting end of the laser source, an objective and a sample which are arranged in the transmitted light direction of the spectroscope in turn, and a differential confocal system in the opposite direction of the reflected light direction of the spectroscope. The invention combines the radial polarized light resolution technology with the pupil filtering technology and improves the transverse resolution power of the system; moreover, the differential work mode of the invention can remarkably improve the axial imaging ability of the system and is applicable to the high-precision detection and metering of nanometer-level geometrical parameters in the nanometer manufacturing field.

An optical arrangement is disclosed wherein an entering beam is converted into an exiting beam having a total cross section of light which is linearly polarized essentially in the radial direction by rotation. For this purpose, rasters of half-wave plates (41, 42, 4i), a combination of birefringent quarter-wave plate 420 and a circular plate 430 is suggested in combination with a conical polarizer 21′. This arrangement is preferably utilized in the illumination portion of a microlithographic projection exposure system. It is important that the arrangement be mounted behind all asymmetric or polarizing component elements 103a.

The invention discloses a method for two-photon fluorescence stimulated emission differential super-resolution microscopy. The method includes the steps that (1) after being collimated, pulsed laser beams are converted into linear polarized light and polarization modulation is conducted on the linear polarized light, so that radial polarized light is obtained; (2) the radial polarized light is converted into circular polarized light and projected onto a sample to be tested, two-photon stimulated emission is conducted, fluorescence is collected, and therefore first signal light intensity I1 is obtained; (3) polarization modulation is conducted on the linear polarized light obtained in the step (1) and the linear polarized light is converted into tangential polarized light; (4) the tangential polarized light is converted into circular polarized light and projected onto the sample to be tested, two-photon stimulated emission is conducted, fluorescence is collected, and therefore second signal light intensity I2 is obtained; (5) effective signal light intensity I is calculated according to a formula I=I1-gammaI2 , so that super-resolution imaging is achieved. The invention further discloses a device for two-photon fluorescence stimulated emission differential super-resolution microscopy. The device is simple, free of light division, low in light power, capable of weakening the photobleaching effect, higher in resolution and larger in imaging depth.

The invention relates to a laser beam based micropore machining device and method. The device comprises a radially polarized beam generation unit for converting a laser beam into a radially polarized beam, and emitting the radially polarized beam to a diffractive optical element, the diffractive optical element for modulating the amplitude and phase of the radially polarized beam, and emitting the modulated radially polarized beam to a focusing lens, and the focusing lens for focusing the modulated radially polarized beam, and obtaining a focusing field of the radially polarized beam in the vicinity of a focus of the focusing lens, wherein the intensity distribution of the focusing filed is determined by the structure of the diffractive optical element and the numerical aperture of the focusing lens, and the micropore machining of a material to be machined is carried out by controlling the intensity distribution of the focusing field. The laser beam based micropore machining device provided by the embodiment of the invention can be used for machining the micropores with large depth to diameter ratio and improving the cutting speed and efficiency of the micropores.

The invention discloses a system for generating a radial Bessel-Gaussian beam. The system comprises a beam expander, a computer-controlled spatial light modulator, a vortex phase plate and a radial polarization convertor that are sequentially arranged in a light direction of a light source generating linearly polarized light, wherein a topological charge of the vortex phase plate is 1; and a calculation hologram generated by a computer is loaded to the spatial light modulator to form a calculation holographic grating, so that a first order Bessel-Gaussian beam is generated. The vortex phase plate is rotated to ensure that phase structure distribution of the vortex phase plate is right opposite to the phase structure distribution of the Bessel-Gaussian beam coming out of the spatial light modulator, and a vortex phase of the Bessel-Gaussian beam is eliminated. Then, the Bessel-Gaussian beam with the vortex phase being eliminated passes through the radial polarization convertor. Radial polarization Bessel-Gaussian beams with different ring numbers can be generated by generating different holograms due to the flexibility of the holograms of the computer, and have self-restorability.

A super-resolution STED micro imaging method based on a radially polarized vortex beam comprises the steps as follows: a stimulation beam is aligned, and a first parallel beam is obtained; the first parallel beam is converted into a first radially polarized beam; the first radially polarized beam is modulated and focused on a sample of a focal plane, and a focus solid light spot is obtained; a restraint beam is aligned, and a second parallel beam is obtained; the second parallel beam is converted into a second radially polarized beam; the second radially polarized beam is converted into the radially polarized vortex beam; the radially polarized vortex beam is modulated and focused on the sample of the focal plane, and a focus hollow light spot is obtained, wherein the center of the focus hollow spot and the center of the focus solid light spot are overlapped, so that only a middle point located in the middle position and having a size smaller than a diffraction limit emits fluorescence; and a detector detects the fluorescence emitted by the middle point.

A laser for outputting radial polarized light beam comprises a pumping source, is characterized in: a pumping light shaping and coupling apparatus, a front cavity mirror, a laser medium, a Brewster shaft vertebra mirror and a rear cavity mirror are disposed successively along the direction of the pumping light from the pumping source; the centered wavelength of the pumping light from the pumping source is the same with the absorption wavelength of the laser medium; the pumping light passes through the pumping light shaping and coupling apparatus and is focused onto the laser medium; and the Brewster shaft vertebra mirror is made of high refractive index material, has a drift angle twice of the complementary angle of the Brewster angle. The invention achieves the advantages of simple structure, low cost, good quality of outputted radial polarized light beam.

The invention relates to an electricity generation device for an oil gas pipeline monitoring system, belonging to the field of oil gas pipeline monitoring and piezoelectric electricity generation. The electricity generation device is characterized in that a left end cover is arranged at the outer side of a pipeline; a shell is fixed between the left end cover and a right end cover; a piezoelectric transducer is sleeved on the inner wall of the shell, and the piezoelectric transducer is formed by adhering a metal base plate and a piezoelectric crystal plate; different magnetic poles of a pair of fixed magnets are oppositely arranged on the free end of the piezoelectric transducer; a main shaft is arranged on the left end cover and the right end cover through a bearing; an impeller is arranged on a main shaft end and placed in a pipeline; and a main shaft spline is sleeved with a magnet ring 1 and a magnet ring 2 which are provided with protruded teeth and opposite radial polarization directions. In the invention, the kinetic energy of an oil gas is converted into electric energy by utilizing the piezoelectric transducer, and therefore, reliable and sufficient energy can be obtained without paving cables or batteries; and the piezoelectric transducer is excited in a non-contact way and protected through two-way magnetic coupling action, and therefore, high reliability is achieved and higher electricity generation capacity is achieved during high rotating speed, lower rotating speed and constant rotating speed of the main shaft.

The invention provides an optical coherence tomography method and device based on radial-direction polarized beams. The method comprises the following steps that after light beams emitted by a low-coherence light source are processed through a Kohler illumination system, the polarization state of the light beams is adjusted and controlled through a polarization transformation system, the amplitude and phase distribution of the light beams are adjusted and controlled through a pupil filter, and accordingly the radial-direction light beams are formed; the radial-direction polarized beams enter a beam splitter prism in an incident mode, are divided into two paths, and enter a sample arm and a reference arm respectively; the two-path light beams are focused on a sample to be measured and a reference plane mirror through microscope objectives of the two-path light beams respectively; returned light after being reflected by the sample to be measured and the reference plane mirror joins in the position of the beam splitter prism, is focused through a focusing lens, is imaged in a probe and is then transmitted to a computer to be post-processed; the reference plane mirror transversely moves to achieve transverse scanning; the sample to be measured is placed on a three-dimensional horizontal-moving table capable of moving in space to achieve three-dimensional imaging of the sample.

The invention discloses a radial polarized lighting ellipsoidal surface pupil amplitude filtering confocal imaging device which belongs to the optical microscope measurement field. After passing through a collimated beam expander, a polarizer, a radial polarized converter and a spectroscope in sequence, laser beams emitted by a laser of the confocal imaging device are converged onto the surface of an ellipsoidal reflector by an objective lens with large numerical aperture, are returned along a symmetric path after being reflected twice by the ellipsoidal reflector and a sample, and are reflected when passing through the spectroscope again. The reflected beams are firstly converged by a coupling lens, and are transmitted to a photomultiplier through an optical fiber for imaging. The focus of the objective lens with large numerical aperture overlaps with the distal focus F1 of the ellipsoidal reflector; and the proximal focus F2 of the ellipsoidal reflector is located on the surface of the sample. The ellipsoidal reflector is in a zonal structure; the reflectivity of two separated zones is identical; and the reflectivity of two adjacent zones is respectively 0 and 1. By using the confocal imaging device disclosed by the invention, the transverse resolution can be improved, and the ratio of the maximum axial electric energy current density to the maximum radial electric energy current density at the focus can be increased.

The invention relates to an all-fiber axisymmetric polarized beam laser based on a less-mode fiber bragg grating and a method for generating an axisymmetric polarized laser beam. The characteristic of the less-mode fiber bragg grating that wavelength and transverse mode are in one-to-one correspondence is utilized, and a wavelength selection device is combined in a fiber resonant cavity, so that axial polarized beam laser output is realized. The laser mainly comprises a pumping source, a gain medium, the wavelength selection device and a mode selector unit containing the less-mode fiber bragggrating. The output has the characteristics of high polarization purity, single wavelength, narrow linewidth, convenience in realizing controlled switchover between radial polarization laser and poloidal polarization laser, and the like. The invention provides the truly all-fiber axisymmetric polarized beam laser with the advantages of more stable structure and convenience in movement and productization without adopting any special coupled devices.

The invention discloses a structured-illumination optical section fluorescence microscopic imaging method and a device thereof, and belongs to the technical field of optical imaging. The device comprises: a light source; a sample stage for carrying a fluorescent sample; a detection system for detecting the fluorescence emitted by the fluorescent sample; a polarizer for changing a light beam into radically polarized lights and a radial polarization converter, which are sequentially arranged between the light source and the sample stage along a light path; a phase mask plate for carrying out phase modulation on the radially polarized lights; a diffraction grating for diffracting the modulated light beam; a galvanometer for moving an illumination pattern on the fluorescent sample, wherein thelight beam emitted by the galvanometer is irradiated onto the fluorescent sample from the Y direction, and the detection system collects the fluorescence from the Z direction; and a processor for controlling the galvanometer to move the illumination pattern from the X, controlling the sample stage to move in the Z direction, and processing and reconstructing a light intensity distribution image collected by the detection system in order to generate a three-dimensional image of the sample. The light beam formed by the device and the method has a small main lube and a large view field.

The present invention provides systems and methods for improved lithographic printing with polarized light. In embodiments of the present invention, polarized light (radially or tangentially polarized) is used to illuminate a phase-shift mask (PSM) and produce an exposure beam. A negative photoresist layer is then exposed by light in the exposure beam. A chromeless PSM can be used. In further embodiments of the present invention, radially polarized light is used to illuminate a mask and produce an exposure beam. A positive photoresist layer is then exposed by light in the exposure beam. The mask can be an attenuating PSM or binary mask. A very high image quality is obtained even when printing contact holes at various pitches in low k applications.

The invention discloses a three-dimensional vector beam and a generation method and apparatus thereof. According to the provided three-dimensional vector beam, the optical field distribution is similar to the Bessel beam; and the cross section polarization-state distribution of the light beam changes with the change of the transmission distance and changes periodically. Within one spatial period, the polarization state of the beam changes from radial polarization to angular polarization alternately. Generated light beams can have various polarization-state distribution modes; and thus compared with the existing vector beam in single polarization-state distribution, the provided vector beam has the greater application value. According to the generation apparatus for the three-dimensional vector beam, generation of three-dimensional vector beams with different orders can be realized only by changing holographic grating loaded on a liquid crystal space light modulator without the need to adjust any other optical element again, so that the operation becomes simple and convenient.

An antenna array includes a plurality of ½ flared notch radiators recessed within a missile nose cone and positioned in a circumferential arrangement around and extending radially from the payload's metal skin to contact an annular metal cover that provides a ground plane such that each ½ flared notch radiator is inclined towards the boresight axis. The payload's metal skin provides an image plane for each ½ flared notch radiator to launch RF energy with a radial polarization normal to the image plane forward through the annular RF radome. Each ½ flared notch radiator may be positioned within a 5½ sided waveguide to further improve directionality and isolation.

A method of processing a substrate having an optical surface includes using an interferometer which includes optics for providing a beam of measuring light. The optics polarize the beam of measuring light such that a tangential polarization component continuously increases relative to a radial polarization component with increasing distance from an optical axis. The substrate is positioned in the beam of measuring light. Using the system, the interferometer determines a surface map of the optical surface, and determines deviations of the optical surface from a target shape.

The invention relates to a method and a device for generating a radial polarized array beam. The method comprises the steps of performing spatial polarization regulation and control on linearly polarized laser, thereby obtaining a radial polarized beam; reducing spatial association characteristic of the radial polarized beam, and obtaining a radial polarized Gaussian-Schell model beam of which the spatial association characteristic accords with Gaussian distribution; regulating the association characteristic of the radial polarized Gaussian-Schell model beam by means of a two-dimensional comb-shaped function, and obtaining a Gaussian array association radial polarized beam; and after the Gaussian array association radial polarized beam is focused by a thin lens, and obtaining the radial polarized array beam at a focus point. Compared with a single-mode beam, the radial polarized array beam generated through the method and the device has advantages of greatly improving working efficiency in application fields such as particle capture and high-density storage, and realizing high research value.

A polarizing device for converting a circularly polarized light beam into a radial polarized light beam, wherein the circularly polarized light beam is obtained by passing a linearly polarized light beam oscillated from a laser oscillator through a quarter-wave plate. The polarizing device includes an axicon lens having a conical surface and a dielectric film formed on the conical surface of the axicon lens.

Polarizers and polarizing beam splitter include one or more pairs of axicons that are configured to separate an input beam into a radially polarized component and a tangentially (or azimuthally) polarized component. A second axicon pair can be provided to recombine the tangentially polarized component so as to provide a more uniform beam intensity. The radially polarized component can be reflected or otherwise directed so that one or both the radial and tangential components are available for use.

The invention belongs to the application optical field, and in particular relates to a generating device for radial polarized light applied to the optical tweezer technology particle capturing, surper resolution microscope, laser processing, and optical information storage. The generating device for radial polarized light comprises a first optical fiber, a second optical fiber, a single-mode laser light source, a polarizer, a first optical power coupler, a third optical fiber, a fourth optical fiber, a first optical fiber polarization state modulator and a second optical fiber polarization state modulator, a second optical power coupler, a fifth optical fiber and an imaging device. The generating device for radial polarized light is the all-fiber device, one beam of light with LP11 mode is stimulated, the light with LP11 mode is divided into two paths through the optical coupler for modulating the polarization state respectively, two paths of light with LP11 mode can be overlapped through the optical coupler, the optical fiber pattern theory and the coupling theory are combined and the space optical path system is not built, and the polarization controller is controlled for generating the polarized light different in vector.