58 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 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 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 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 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 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

The invention discloses a high-flux wide-spectrum microscopic diffuse reflection illumination system, which comprises a multiband LED (Light Emitting Diode) light emitting module, an aspheric collimating lens group, a beam combining optical array, an achromatic lens and an output multimode optical fiber, and is characterized in that the multiband LED light emitting module comprises at least three high-power LED units with complementary central wavelengths; the aspheric collimating lens group converts divergent light beams of the LED unit into collimated light beams, the beam combining optical array realizes spatial coaxiality of all the collimated light beams through the dichroscope and combines the collimated light beams into composite full-spectrum collimated light beams, and the achromatic lens focuses the composite full-spectrum collimated light beams on the same focal plane. And the output multimode optical fiber receives the focused composite full-spectrum collimated light beam and serves as a cold light source input end of the microspectrometer. An LED pure cold light source is adopted, infrared heat radiation is avoided, and sample heat damage and catalyst inactivation can be avoided; meanwhile, aspherical collimation, dichroscope beam combination and achromatic coupling are adopted, and high-power output of the wave band of 380-830 nm is achieved.

The present invention relates to a large-field-of-view, high-resolution, and large-working-distance aneroid microscope optical system, comprising a glass slide, a collimator lens group, an emission filter, and a Gaussian-like lens group arranged sequentially from the object plane to the image plane; an achromatic lens group or an achromatic lens is arranged at at least one position between the collimator lens group and the emission filter, or between the emission filter and the Gaussian-like lens group; the resulting microscope optical system has a numerical aperture of 0.45-0.55, a magnification of 5-10 times, an object-space field of view diameter of 4mm-6mm, an object-space resolution of 0.4μm-0.6μm, a working distance of 2mm-3mm, and a visible light wavelength range of 460nm-680nm. The microscope optical system has an MTF value close to the diffraction limit within the entire field of view of the working band, and a relative distortion of less than 1% within the entire field of view of the working band. Compared with traditional objective lenses with the same field of view, the system has higher imaging resolution, smaller relative distortion, and a larger working distance.

To provide a system having improved spectral accuracy of optical control systems, which allow real-time monitoring of various stages of device manufacturing.SOLUTION: A manufacturing machine including a broadband collimator assembly includes: a collimator housing 202 that includes an optical interface 214 optically coupling to a process chamber that has a target surface; a port to receive an optical fiber 208 to deliver, to an enclosure formed by the collimator housing, a first (second) plurality of spectral components of light belonging to a first (second) range of wavelengths; and an achromatic lens 210 located, at least partially, within the enclosure formed by the collimator housing, the achromatic lens directing the first (second) plurality of spectral components of light onto the target surface to illuminate a first (second) region on the target surface, where the second region is substantially the same as the first region.SELECTED DRAWING: Figure 2

The application provides a light beam quality analyzer, relates to the technical field of lasers, and comprises a light source, a spectral filter, a light filtering unit, an achromatic lens group, a mirror group and an image sensor, wherein the spectral filter, the light filtering unit, the achromatic lens group and the mirror group are sequentially arranged along the light emitting direction of the light source; the laser emitted by the light source sequentially passes through the spectral filter, the light filtering unit and the achromatic lens group, the achromatic lens group outputs an adjusted light beam, the adjusted light beam is reflected by the mirror group, and the adjusted light beam is transmitted to the image sensor; the achromatic lens group comprises a first lens, a second lens and a third lens which are sequentially arranged along the light emitting direction of the light source; the focal length of the first lens and the focal length of the second lens satisfy the relationship: f / 5<|f1|<|f2|<f / 4. The application helps to improve the measurement accuracy and stability of the light beam quality analyzer.

The invention provides a chalcogenide glass thermal bonding material as well as a preparation method and application thereof, and relates to the technical field of infrared optical materials. The chemical general formula of the chalcogenide glass thermal bonding material is As < 32 > Se < 48-x > Te < x > I < 20 >, and the value range of x is an integer from 0 to 30. By regulating and controlling the content of iodine and tellurium, the glass-transition temperature is remarkably reduced, the refractive index is improved, and the optical glass has excellent optical performance and thermal bonding adaptability in an infrared wide spectrum range. The infrared band transmittance of an achromatic lens group prepared based on the material is improved by 16%, the tensile strength reaches 0.25 MPa, the technical problem that aberration correction and system compactness are restricted due to lack of reliable thermal bonding materials in an existing infrared optical system is effectively solved, and the achromatic lens group has wide application space.

The invention discloses a full-automatic micro-area angle resolution system, which comprises an illumination excitation module, a sample table, an objective lens, an angle resolution signal collection module and a spectrograph, and is characterized in that the illumination excitation module comprises a light source module, a first achromatic lens, a beam splitter and an objective lens; the angle resolution signal collection module comprises a second achromatic lens, a diaphragm, a first power mechanism, a first reflector, a second power mechanism, a third achromatic lens, a fourth achromatic lens, a CMOS camera and a fifth achromatic lens, and the first power mechanism is connected with the third achromatic lens and used for driving the third achromatic lens to move; the light from the diaphragm is transmitted or not transmitted through the third achromatic lens; and the second power mechanism is connected with the first reflecting mirror and is used for transmitting light to the CMOS camera or the spectrograph. According to the invention, optical path conversion can be controlled through the achromatic lens and the reflector, so that an optical signal can reach a CMOS camera or a spectrometer to obtain different information of a sample, and flexible switching between a real space and a K space is realized.

The present invention relates to the field of optical detection, and in particular to an interferometric confocal measurement system and method based on spatial encoding. White light generated by a light source is collimated by a first collimating lens and then separated into S-polarized light and P-polarized light by a polarization beam splitter prism. The S-polarized light is incident on a reference plane mirror via a first quarter-wave plate and returns to the polarization beam splitter prism carrying information about the reference surface. The P-polarized light is incident on a blazed grating via a second quarter-wave plate for lateral dispersion and then converted by a first achromatic lens into monochromatic polarized light of different wavelengths and the same focal length. The two beams are focused together at the same depth position of an object to be measured and return to the polarization beam splitter prism carrying information about the object to be measured. The two polarized light beams are combined and focused by a focusing lens onto the target surface of a photodetector of an imaging spectrometer on which a mask is placed, thereby obtaining an interference image of the object to be measured and performing spectral and interferometric analysis. The present invention can increase lateral scanning speed, shorten measurement time, and improve resolution.

The utility model discloses a detection device and laser repairing equipment. The detection device comprises a light source assembly, a lens assembly and a first camera. The light source assembly is used for emitting illumination light to a set area of the display panel to form reflected light; the lens assembly comprises an objective lens and an achromatic lens, the objective lens and the achromatic lens are sequentially arranged in the propagation path of the reflected light in the propagation direction of the reflected light, and the achromatic lens is used for eliminating the chromatic aberration of the reflected light; and the first camera is used for receiving the reflected light transmitted by the achromatic lens so as to obtain an image of the set area. The detection device can effectively improve the imaging quality of the first camera.