69 results about "Achromatic lens" patented technology

The invention belongs to the field of astronomical telescopes, and particularly relates to a large-aperture spliced telescope adjusting device and method, and the method comprises the steps: starting a light source module, providing a far-field illumination light beam for a spliced primary mirror, and carrying out the confocal adjustment of each sub-mirror through an adjusting mechanism according to the far-field illumination light beam; the light source switching module is used for providing a near-field illumination light beam for the spliced primary mirror, and the near-field illumination light beam is split into two separated sub light beams by the pyramid mirror after penetrating through a splicing seam of the spliced primary mirror; performing dispersion on all the sub-beams through a dispersion prism, and converging the dispersed sub-beams through an achromatic lens to form dispersion stripes; the phase difference of the dispersion fringes is extracted through the camera, and co-phase adjustment is carried out on the sub-mirrors through the adjusting mechanism according to the phase difference of the dispersion fringes. According to the invention, high-precision and high-flux spectral response calibration and co-phase detection of the large-aperture spliced telescope can be realized, so that reliable technical support is provided for construction and operation of a next-generation giant astronomical telescope.

The invention discloses a carrier three-dimensional diffusion microscopic imaging system based on two-photon excitation, and belongs to the technical field of microscopic imaging. The light is transmitted according to the light transmission sequence; the device is composed of a wavelength-adjustable femtosecond optical device, a full-automatic optical parameter amplifier, a first achromatic lens, a pinhole, a second achromatic lens, a first diaphragm, a first fully-polished reflector, a two-dimensional galvanometer, a scanning lens, a sleeve lens, a dichroscope, an objective lens, a piezoelectric displacement sample table, a focused white light source, a second diaphragm, a beam splitter, a third achromatic lens and a second diaphragm. The device is composed of a first achromatic lens, a second achromatic lens, a third achromatic lens, a fourth achromatic lens, a camera and a detector, and the MAPbI3 or MAPbBr3 crystal is placed on a high-precision piezoelectric displacement sample table as a semiconductor sample. The position of the excitation light beam on the surface of the sample is continuously changed by rotating the galvanometer, and the fluorescence emitted from the same position on the surface of the sample can be detected by using the detector, so that the three-dimensional diffusion process information of closure elements in the sample under the action of the excitation light beam is obtained, and the diffusion rule of the sample is revealed.

The invention relates to the field of optical detection, in particular to an interference confocal measurement system based on space coding and a measurement method thereof.White light generated by a light source is collimated through a first collimating lens and then divided into S polarized light and P polarized light through a polarization splitting prism, the S polarized light enters a reference plane mirror through a first quarter-wave plate, and the P polarized light enters a second quarter-wave plate; p polarized light enters a blazed grating through a second quarter-wave plate for transverse dispersion and then is changed into monochromatic polarized light with different wavelengths and the same focal length through a first achromatic lens, and the monochromatic polarized light and the monochromatic polarized light are jointly focused at the same depth position of an object to be measured. Information of the object to be measured is carried and returned to the polarization splitting prism, two beams of polarized light are combined and then focused on a target surface of a photoelectric detector of an imaging spectrometer with a mask plate through a focusing lens, an interference image of the object to be measured is obtained, and spectrum and interference analysis is carried out. According to the invention, the transverse scanning speed can be improved, the measurement time can be shortened, and the resolution can be improved.

The invention discloses a Raman-meter temperature and humidity laser radar detection system with three wavelengths and eight channels. The Raman-meter temperature and humidity laser radar detection system comprises a transmitting system, a receiving system, a data acquisition and processing system and a computer control system. Laser signals with the wavelengths of 355 nm and 532 nm are combined with a dynamic background light intensity adjusting mechanism, so that the signal sensitivity under the conditions of strong background light in the daytime and low background light at night is ensured. The light splitting module adopts a high-performance narrow-band optical filter and a multilayer medium coated dichroic mirror which are arranged at a preset inclination angle and cooperate with an achromatic lens group of the collimation system, so that efficient light beam transmission and accurate separation of multi-wavelength signals are realized, spectral crosstalk is remarkably reduced, and the system detection precision, the environment adaptability and the data processing reliability are improved; the method is suitable for all-weather and multi-scene atmosphere detection.

The invention discloses a flat-topped beam uniformity optimization and centroid position control feedback system and method, and belongs to the technical field of automatic feedback control. The problems that an optical element needs to be frequently adjusted in a traditional method, and the same accuracy and reaction speed are difficult to achieve in a method of manually adjusting the optical element in an optical path are solved. The closed-loop feedback system comprises a laser, a first lens, a second lens, a first reflector, a second reflector, a third reflector, a spatial light modulator, a polarization beam splitter (PBS), an achromatic lens, a fourth reflector, a camera, a computer, a high-voltage amplifier, piezoelectric ceramics and a lambda / 2 wave plate. The position and intensity distribution of the flat-topped light beam are dynamically adjusted through a real-time image processing technology, and an experimenter does not need to manually adjust optical elements in a light path. The method is more flexible and higher in precision. The innovation not only helps to improve the accuracy and efficiency of the experiment, but also provides important support for smooth development and development of the experiment.

The invention discloses an automatic focusing system and a thickness measuring system suitable for a semitransparent wafer, and the automatic focusing system comprises the semitransparent wafer, an objective lens to be focused, a reflector, a laser light source, a first lens, a small-hole diaphragm, a programmable liquid crystal device, a collimating lens, a second lens, a third lens, a first detector, a second detector, and a motor. Accurate focusing of the objective lens is achieved through detection light spots of two detectors, and the thickness measuring system comprises a semitransparent wafer, a dispersion objective lens, a reflecting mirror, a white light source, an achromatic lens, a small-hole diaphragm, a programmable liquid crystal device, a collimating lens, a convergent lens, a slit, a lens and the detectors. According to the mapping relation between the transverse displacement on the detector and the thickness of the semitransparent wafer, the unknown thickness of the semitransparent wafer is measured, a spectrograph is not needed, and the cost is low.

The invention discloses a dual-wavelength polarization tuning interference spectrum frequency discrimination device and a synchronous frequency locking method, and the method specifically comprises the steps: enabling a polarization Michelson interferometer to divide incident laser into two beams of linearly polarized light through a plurality of achromatic wave plates and a polarization splitting prism, and enabling the two beams of linearly polarized light to form dual-wavelength circularly polarized light for output after the two beams of linearly polarized light are reflected and combined; the output light is divided into two beams after passing through a light splitting module, and the two beams are respectively collected and processed into a four-quadrant synchronous phase-shifting interferogram by a polarization camera after passing through an achromatic lens, and the wavefront phase difference is calculated in real time; the other beam is compensated by the rotary linear polarizer and then is received by the detector; through the corresponding relation between the wavefront phase difference and the rotation angle, the rotation linear polarizer is driven in real time to carry out phase compensation, so that polarization tuning and frequency locking are realized; meanwhile, a piezoelectric mirror bracket control signal is obtained through calculation, and interferometer parallelism error correction is carried out. According to the invention, synchronous real-time monitoring and active feedback locking of dual-wavelength interference signals can be realized, and the system has the advantages of high tuning resolution and accurate data.

The invention relates to a design method of a large-size and large-numerical-aperture discrete achromatic superlens insensitive to middle-infrared band polarization. The invention relates to the technical field of micro-nano photon metasurfaces. Phase delay and dispersion required by an achromatic lens at different positions of the lens are obtained according to the diameter, the numerical aperture and the working frequency band of the metasurface; constructing a corresponding unit library insensitive to polarization; and screening required units in the unit library according to the phase and group delay required by each position, and arranging the units in a square manner by taking the center of the super lens as an original point and taking a period P as an interval in x and y directions, so as to obtain the designed super lens. The achromatic superlens provided by the invention has the characteristic of polarization insensitivity, and has a wider application scene compared with a PB phase type lens only sensitive to circular polarization.

The present disclosure is directed to methods of tuning chromatic aberration of the eyes of a subject for the treatment of myopia. Refractive errors of an eye of the subject are assessed in the presence of one or more of red, blue, or green colored light, individually. A hybrid achromatic lens having a refractive portion and a diffractive portion is then designed, with the hybrid lens having a distribution of power varied between the refractive portion and diffractive portion. As such, the hybrid lens produces a state of chromatic aberration for the eyes of the subject capable of reducing or eliminating myopia advancement for the eyes of the subject.

The present invention discloses a wavelength-division multiplexing multi-user optical wireless communication system based on a spatial light modulator. Multi-wavelength signals from a transmitting end enter free space through a multimode optical fiber and a collimating lens, and after being expanded by an achromatic lens system, are irradiated on the spatial light modulator. After being modulated by the multi-wavelength hologram displayed on the spatial light modulator, optical signals of different wavelengths are split and deflected, and focused on corresponding receivers, realizing multi-channel signal transmission. The present invention solves the problem in traditional free-space optical communication that only point-to-point fixed transmission is supported, and multi-user and mobile users are not supported. Operations such as switching between users and multi-user power allocation can be performed, and it has the advantages of strong flexibility and easy deployment, and has good application prospects in free-space optical wireless communication systems.

Apparatuses, systems and methods for providing improved ophthalmic lenses, particularly intraocular lenses (IOLs), include features for providing improved extended depth of focus lenses. Exemplary ophthalmic lenses can include an optic including a diffractive profile including at least one set of echelettes, each echelette of the set having a different width in r-squared space than any other echelette of the set and the at least one set of echelettes repeating at least once upon the optic.

This invention discloses a plasma local current measurement device and method based on optical methods, belonging to the field of optical measurement technology. The device includes: a high-energy pulsed laser, a beam splitter, a photodiode for triggering an ICCD camera, a beam sampling mirror for providing optical signals to the photodiode, a focusing lens for focusing the high-energy pulsed laser, a pulsed power device for generating Z-pinch plasma, a beam collector, an achromatic lens for collecting scattered light, a reflective grating spectrometer, an ICCD camera, and a Mach-Zehnder interferometer. Electron density distribution, electron temperature, ion temperature, plasma velocity, and relative electron-ion drift velocity can be simultaneously obtained through plasma interference fringe images and Thomson scattering spectra. The local current at the measurement point is obtained by multiplying the electron density, electron charge, and relative electron-ion drift velocity at the measurement point.

The application discloses a cold molecule optical association device based on supercontinuum fiber, and relates to the technical field of laser physics, which comprises the following components: an optical dipole trap laser (1) is used for outputting high-power laser to form an optical dipole trap; the laser is shot into a first double-color mirror (9); a titanium-sapphire laser (2) and a semiconductor laser (3) are used for emitting different molecular association beams; the association beams are combined by a polarization beam splitter (4) and then combined with a detection laser (5) to form a detection light beam; the four light beams are combined by the first double-color mirror (9) and then coupled into the same supercontinuum fiber (7) through an aspheric mirror (6); the four light beams output by the supercontinuum fiber (7) are expanded by a set of lens groups (10) and then focused on an atomic group (12) in a vacuum cavity (8) through an achromatic lens (11); and the number of atoms is obtained. The application can not only ensure complete coincidence of two light beams but also realize coincidence of multiple light beams, and the experimental operation is simple. The application further solves the above technical problems in the prior art.

The invention belongs to the technical field of visible light communication, and particularly relates to a wide-spectrum visible light receiving system using an achromatic lens combination. The visible light receiving system comprises an achromatic lens combination and a PD. The achromatic lens combination is composed of a large-size common optical focusing lens and a small-size super lens with a phase compensation function. The super lens takes a glass cylinder as a bottom support, and a TiO2 nano-column assembly with the same height is arranged on the glass cylinder; the optical focusing lens is located on the left side of the system, the super lens is located in the middle, and the PD is located on the rightmost side; the distance between the PD and the top of the TiO2 nanorod is equal to the focal length of the super lens on the extension line of the central line of the super lens; the layout ensures that the visible light emitted by the LED is accurately converged at the central position of the light absorption chip of the PD through the super lens, so that the light energy absorbed by the PD can be greatly enhanced, a plurality of lenses and objective lenses do not need to be used for zooming light beams to introduce extra chromatic aberration, and the signal detection and processing effects are greatly improved.

The invention discloses an image reconstruction method and imaging system based on multimode fiber holography and polarization coding, and the method comprises the following steps: S1, outputting a laser light source, eliminating the reflected light through an isolator, and carrying out the light beam expansion through a first lens and a second lens; s2, dividing the expanded light beam into a reference arm and a signal arm by using an optical splitter; s3, in the signal arm, generating a hologram containing spatial position information through a DMD, dynamically switching polarization states through an optical relay device, and forming holographic light field distribution of different polarization states in a three-dimensional space; s4, the modulated multi-polarized light field is coupled through a microscope objective to enter a multimode optical fiber; s5, the optical fiber output end forms a speckle pattern carrying polarization information through the achromatic lens group; and S6, collecting a speckle pattern through a camera, and realizing holographic image reconstruction by adopting a U-Net neural network. According to the invention, high-fidelity image transmission and reconstruction in the multimode optical fiber are realized.

The embodiment of the utility model provides a photoelectric sensor, and the photoelectric sensor comprises a light projection substrate which carries a light projection element, and the light projection element projects a white light (RGB)-near infrared light (NIR) wide spectrum light beam; the projection achromatic lens is made of optical plastic, has a double-gluing structure and can converge white light (RGB)-near infrared light (NIR) wide-spectrum light beams projected by the projection element; and a light receiving substrate on which a light sensing element is mounted, the light sensing element acquiring the white light (RGB)-near infrared light (NIR) wide spectrum light beam reflected by an object and converting the wide spectrum light beam into an electric signal. Therefore, the color detection accuracy can be improved, the assembly is convenient, and the cost is saved.

The present invention belongs to the field of magnetic field imaging measurement, and provides a diamond NV center magnetometer imaging method and system, including: calibration and chromatic aberration elimination, focus positioning, high-pass filter filtration, and image capture. Through the structure of an achromatic lens, a wedge prism group, and a diamond NV center, the present invention reduces the laser spot size and improves the spatial resolution of the magnetometer.

The invention provides a photoelectric composite slip ring and nonlinear optical detection equipment and system, and relates to the technical field of optics. In order to solve the problem of cable torsion caused by an imaging object in a detection system, a photoelectric composite slip ring is arranged in the detection equipment, so that the detection equipment rotates based on rotation of an imaging probe relative to the photoelectric composite slip ring; therefore, cable torsion caused by rotation of one end is eliminated, so that the imaging probe and the imaging object can relatively freely move in the imaging space. Furthermore, in the nonlinear optical detection equipment, a multi-mode photonic crystal fiber is usually configured to be a multi-mode photonic crystal fiber capable of transmitting exciting light of multiple wavelengths in a target wavelength range, so that in order to avoid influence on light beam propagation of the multi-mode photonic crystal fiber, in an optical alignment structure in a photoelectric composite slip ring, the multi-wavelength exciting light can be transmitted by the multi-mode photonic crystal fiber. The numerical aperture is matched with the optical fiber, and an achromatic lens is additionally arranged, so that the light beam propagation requirement of the multimode photonic crystal optical fiber, especially the propagation requirement of exciting light with different wavelengths, is met.

The present application relates to a kind of diffraction polarization imaging systems, including two major modules of diffraction imaging system, focal plane detector, wherein the diffraction imaging system includes a diffraction primary mirror and a set of Schupmann achromatic structure.Target radiation light passes through front aperture and diffraction primary mirror, then after diffraction primary mirror Schupmann achromatic lens group is used to correct chromatic aberration of light emitted by diffraction primary mirror, and converging lens is used to converge into the focal plane polarization detector.Light can be detected by focal plane detector to 0 °, 45 °, 90 °, 135 ° polarization image, and polarization degree and polarization angle image can be solved by Stokes vector method.The above-mentioned diffraction polarization imaging system uses a diffraction primary mirror, a set of Schupmann achromatic structure and a focal plane detector, four different angle polarization images are obtained simultaneously by one-time exposure, the number of imaging system lenses is greatly reduced, and the cost and complexity of the system are reduced.

The invention belongs to the technical field of optical systems, and discloses a coaxial optical system for transmitting and receiving trace photons. The device comprises a first doublet achromatic lens, a first single lens, a first optical fiber collimator, a second doublet achromatic lens, a second single lens, a third single lens, a fourth single lens, a first optical fiber jumper, a first optical fiber beam combiner and a first optical fiber filter which are coaxially arranged from front to back. A reflection port of the first optical fiber circulator is connected with the optical fiber collimator through a single-mode optical fiber, and an emergent port of the first optical fiber circulator is connected with one incident port of the first optical fiber beam combiner. According to the invention, a receiving and transmitting coaxial optical system is adopted, the consistency of deflection angles of two light paths is ensured, and the device can adapt to detection of targets at different distances under the condition that the receiving and transmitting optical axis angle is not adjusted.

The utility model discloses a microscope refitting module based on multiple laser simultaneous excitation, refitting module includes collection module, microscope main part, module support column and excitation module, wherein, refitting module external structure includes adjustable reflector, beam splitter, first light hole, second light hole, third light hole and fourth light hole, and excitation module includes first optical fiber adapter, lens, first reflector, front dichroic mirror, middle dichroic mirror, rear dichroic mirror and reflector group, and collection module internal structure includes second optical fiber adapter, achromatic lens, first optical filter, second optical filter, second reflector and collection dichroic mirror. Above all, the microscope refitting module based on multiple laser simultaneous excitation can realize the correlation of the microstructure and optical performance of material inside and analyze the composition distribution and chemical state of material, in addition, can also carry out the spectrum test of double wave band.

The invention relates to the technical field of multi-parameter collaborative optimization of a display optical system, in particular to an optical performance optimization system of a lens group for a display screen, which comprises an acquisition module, a quantum chemical field modeling module, an optimization module, a multi-modal solving module and a generation module. The acquisition module generates four-dimensional spectral data through entangled photon pair interference, and reveals a light field polarization phase coupling effect; the quantum chemical field modeling module is used for simulating and outputting a quantum non-localization correlation model based on wave function collapse, and positioning a quantum-level conflict domain of geometric distortion and dispersion compensation; the optimization module maps the conflict model into a high-dimensional hypergraph constraint topology, and constructs a differentiable optimization framework through manifold dimensionality reduction; the multi-modal solving module outputs a Pareto optimal parameter set; and the generation module migrates the energy band characteristics of the photonic crystal, and generates a wide-view-field achromatic lens laminated framework through a reinforcement learning decision-making material combination strategy so as to eliminate a color shift phenomenon.

The utility model provides a wide-spectrum confocal collimator. The wide-spectrum confocal collimator comprises a collimator main body shell, an optical fiber connector, an achromatic lens and a compensating mirror, one end of the collimator main body shell is connected with an optical fiber connector, one end, far away from the optical fiber connector, in the collimator main body shell is provided with a group of achromatic lenses and a compensating mirror which are sequentially arranged along the direction of an optical path, and an air gap is reserved between the compensating mirror and the achromatic lenses; the optical fiber connector is connected with an optical fiber and can enable the end face of the optical fiber to coincide with the focus of the achromatic lens in the collimator main body shell after being connected with the collimator main body shell. The achromatic lens and the compensating mirror are adopted as optical components in the collimator body shell, chromatic aberration can be reduced and light beam collimation can be optimized through the achromatic lens, the light beam is further accurately adjusted through the compensating mirror, and it is ensured that the finally output light beam has high-quality collimation and stability.

The invention relates to the technical field of laser detection, in particular to a laser wavelength measurement system based on a Fizeau interferometer, which comprises a Galileo beam expanding module, an attenuation piece, a Fizeau interference module, a linear array CMOS camera and a data processing module, wherein the Galileo beam expanding system is composed of a double-agglutination achromatic negative lens and a double-agglutination achromatic lens, the five-time beam expanding function is achieved on incident laser, and the influence of chromatic aberration in the broadband range is reduced; to-be-detected laser passes through the beam expanding system, passes through the attenuation piece and then enters the Fizeau interference module to be interfered, and an interference image is collected by the photoelectric imaging sensor and then is subjected to subsequent operation by the upper computer; the invention can provide a laser wavelength measuring device which is free of a moving device inside, wide in measuring range and low in cost for a laser in a wave band range of 633-852 nm.

The application discloses a kind of spatial filtering type differential resonance photoacoustic stimulated raman detection systems and methods, belong to gas detection technical field, the system includes laser source module, raman frequency shifter module, spatial filtering type differential resonance photoacoustic cell and signal acquisition and processing unit;High-energy pulsed laser generated by laser source module is shot into raman frequency shifter module after collimation;The double-color coherent light beams output by raman frequency shifter module are focused after achromatic lens, and are coaxially shot into the center of spatial filtering type differential resonance photoacoustic cell, and the photoacoustic signals excited are collected by two microphones of spatial filtering type differential resonance photoacoustic cell;Signal acquisition and processing unit is electrically connected each microphone;Two acoustic tubes of spatial filtering type differential resonance photoacoustic cell are symmetrically arranged in the inside of large tube buffer cavity, and two Brewster windows are respectively sealed and installed at the two ends of large tube buffer cavity.The application can effectively inhibit window optical damage, improve system stability.

The invention relates to a refraction and super hybrid achromatic lens, a camera module and a terminal device, and belongs to the field of optical lenses, the refraction and super hybrid achromatic lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object plane to an image plane along an optical axis; the first lens is an aspheric lens, the second lens is a super lens, the third lens is an aspheric lens, the fourth lens is an aspheric lens, and the fifth lens is an aspheric lens. According to the invention, only the combination of one super lens and four plastic lenses is adopted, and the achromatic characteristic of the super lens is utilized, so that the effect of low chromatic aberration of the visible light wave band is achieved while high image quality presentation is maintained.

The present invention relates to the field of display technology, and in particular to a display system and an achromatic lens combination thereof. The achromatic lens combination includes a first concave lens, a circular polarizer, and a magnifying convex lens combination. The first concave lens has a light-receiving surface and a concave surface, the light-receiving surface and the concave surface are opposite to each other, and the light-receiving surface is a plane or a convex surface. The circular polarizer is arranged on the concave surface of the first concave lens, and the circular polarizer is curved corresponding to the concave surface. The magnifying convex lens combination is arranged on the circular polarizer with the aid of optical glue, and the first concave lens, the circular polarizer, and the magnifying convex lens combination are all arranged in sequence along the optical axis. When the light-receiving surface is a convex surface, the circular polarizer can be arranged on the light-receiving surface to be curved corresponding to the convex surface, so that the circular polarizer, the first concave lens, and the magnifying convex lens combination are all arranged in sequence along the optical axis.

A compact Schmidt telescope (1), with an aperture number less than 2, a wide spectral range, and an extended field of view, capable of providing the optical image quality necessary for detecting the presence of small space objects. The telescope comprises, aligned and centered on the same optical axis (O), a concave mirror (10), a sphericity corrector (12), and a field corrector (14). The sphericity corrector (12) comprises an aspheric-achromatic lens doublet, i.e., two aspheric lenses (12A, 12B), each comprising two faces, at least one of which is curved and at least one of which has an aspheric profile. The two lenses are composed of different optical glass so as to form an achromatic doublet. The two lenses further have a central hole (120) centered on the optical axis (O) in which the field corrector (14) is placed. Figure for the abstract: Fig. 1