28 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 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.

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 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 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 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 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.

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 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 utility model relates to the technical field of experimental teaching instruments, in particular to a dual-wavelength laser Raman spectrum experimental instrument, which comprises a reflector path system, a monochromator and a photoelectric detector, the reflector path system comprises a shell, a first laser, a long-pass optical filter, a first diaphragm, a second diaphragm, a short-focus achromatic lens, a sample table and a long-focus achromatic lens; the instrument further comprises a second laser, a first reflecting mirror, a second reflecting mirror, a third reflecting mirror and an inclined hole reflecting mirror. An opening is formed in the machine shell, and a turning cover is arranged on the opening. The laser Raman spectrum experimental instrument overcomes the defects that in the prior art, a laser Raman spectrum experimental instrument used for experimental teaching is of a closed structure and adopts a single-wavelength excitation light source, so that teaching content and teaching effects are limited, and the external light path system adopts an open structure and is provided with two lasers. Students can fully understand the internal structure of the instrument and the influence of excitation light sources with different wavelengths on experimental results, and the teaching effect is improved.

An achromatic lenses for a peep sight is to be mounted onto an archery bowstring. The achromatic lens is to be situated and retained in a lens cavity of the peep sight and includes various positive verifier or a negative clarifier glass lens joined by cement to a negative or positive flint lens, respectively. The peep sight has a peep sight body mounted to the bowstring with an internal hole therethrough with a front end, facing a front bow sight, and a rear end facing an archer's eye. An aperture with the lens cavity has a front end and a rear end and is adapted for locking engagement within the hole of the body. The aperture has a passage therethrough axially aligned with the threaded hole with a front end facing the front bow sight and a rear end to be facing the archer's eye. The lens cavity is in the passage suitably adjacent to the aperture's front end.

The application discloses a kind of digestive tract optical coherence tomography and endoscope dual-mode imaging device and detection system;The device includes OCT in-vitro optical path module and dual-mode capsule probe.Dual-mode capsule probe is connected with OCT in-vitro optical path module by signal transmission line with optical fiber core line inside.Dual-mode capsule probe includes capsule shell, dichroic mirror, OCT acquisition module, endoscope imaging module and rotating drive component.OCT acquisition module includes lens support, beam collimator, achromatic lens, liquid lens and aspheric lens.The application is tilted in the inner cavity of capsule probe Middle part dichroic mirror, the near-infrared light and visible light reflected in the same position in digestive tract at the same time are separated after being separated respectively to OCT acquisition module and endoscope imaging module;So that the OCT image and endoscopic image of the same position in digestive tract are simultaneously collected, to facilitate the comprehensive analysis of digestive tract pathological condition.

The embodiment of the invention relates to the technical field of quantum information, discloses a coupling device for a modular entanglement source, a quantum entanglement source system and equipment, and can improve the adjustability and applicability of the coupling device. The device comprises an optical assembly and an adjusting mechanism, and the optical assembly sequentially comprises an optical fiber interface used for receiving pumping laser in the light path propagation direction; the plano-convex lens is used for collimating the pump laser and outputting the pump laser to the first achromatic lens; a first achromatic lens; the light path folding module is used for reflecting the light beams output by the first achromatic lens for multiple times so as to prolong the light path; the second achromatic lens is used for receiving the light beams reflected by the light path folding module for multiple times and outputting the light beams; the adjusting mechanism is used for driving the first achromatic lens and the second achromatic lens to move along the optical axis so as to change the positions and the distances of the first achromatic lens and the second achromatic lens, and then the waist position and the size of a light beam output by the second achromatic lens are adjusted.

Aspects of the disclosure provide an achromatic lens. The achromatic lens can include a first lens and a second lens. The first lens with a negative focal length includes a first optically transparent member having a first surface and a second surface. The second lens is attached to the first lens at the second surface. The second lens having a positive focal length includes a second optically transparent member having a third surface and a fourth surface. A second chromatic aberration of the second lens is reduced by a first chromatic aberration of the first lens. The second surface of the first lens includes a first Fresnel structure.

The invention relates to a cathode ray fluorescence detection system based on optical fiber coupling, and relates to the technical field of material characterization, and the cathode ray fluorescence detection system comprises a light wave collection device which comprises a lens sleeve, a light wave collection mirror and an achromatic lens, the light wave collection mirror is arranged at one end, close to a sample, of the lens sleeve, and the achromatic lens is arranged on the lens sleeve; the lens sleeve is used for collecting cathode ray fluorescence excited by a sample and reflecting the cathode ray fluorescence to the achromatic lens, and the achromatic lens is arranged in the lens sleeve and used for converging the cathode ray fluorescence to a focus of the achromatic lens; the optical fiber adapter is arranged at the end, away from the sample, of the lens sleeve, the center position of the optical fiber adapter is located at the focus position of the achromatic lens, and the optical fiber adapter is used for connecting the lens sleeve to an optical fiber; and the spectrograph is connected with the optical fiber. The distance between the achromatic lens and the optical fiber adapter is basically fixed, and the problems that a fixed optical path framework is insufficient in flexibility and is difficult to adapt to spectrometers of different wavebands are solved.

A hyperspectral imager using a freeform gradient-index lens using a GRIN comprised of three or more materials to disperse electromagnetic radiation comprising optical wavelengths. An achromatic lens comprising a multi-material gradient index profile formed by fabricating in a composition together four or more materials selected based on their individual refractive index, Abbe number and partial dispersion values. A dispersion controlling element used to separate electromagnetic radiation comprising optical wavelengths through use of a hyperapochromatic multi-material GRIN lens using a GRIN comprised of four or more materials.

The invention discloses a mixed multi-layer compressed light field near-to-eye display system and an image generation method thereof. The system comprises a first multiplication display, a second multiplication display, a variable-focus lens, a doublet achromatic lens, a control unit and a gasket, the two multiplication displays modulate the intensity of the light; the variable-focus lens and the doublet achromatic lens are arranged in light paths of the first multiplication display and the second multiplication display; the control unit is electrically connected with the first multiplication display, the second multiplication display and the variable-focus lens; the control unit controls the variable-focus lens to be in at least two different focal length states so as to meet frequency switching of the human vision persistence effect. The upper limit of the depth of field of the system is obviously expanded, the thickness of the system is greatly reduced and the brightness loss is reduced by about 50% compared with the traditional four-layer compressed light field display while the adjustment range of 2.0 D and above is realized, and a new way is provided for developing light and thin near-to-eye display equipment with high visual comfort.

The invention discloses a spatial filtering type differential resonance photoacoustic stimulated Raman detection system and method, and belongs to the technical field of gas detection, the system comprises a laser source module, a Raman frequency shifter module, a spatial filtering type differential resonance photoacoustic cell and a signal acquisition and processing unit; high-energy pulse laser generated by the laser source module is collimated and then enters the Raman frequency shifter module. After being focused by an achromatic lens, a two-color coherent light beam output by the Raman frequency shifter module coaxially enters the center of the spatial filtering type differential resonance photoacoustic cell, and excited photoacoustic signals are collected by two microphones of the spatial filtering type differential resonance photoacoustic cell; the signal acquisition and processing unit is electrically connected with each microphone; two acoustic tubes of the spatial filtering type differential resonance photoacoustic cell are symmetrically arranged in a large tube buffer cavity, and two Brewster windows are installed at the two ends of the large tube buffer cavity in a sealed mode respectively. The optical damage of the window can be effectively inhibited, and the system stability is improved.

Aspects of the present disclosure provide an achromatic lens. The achromatic lens may include a first lens and a second lens. The first lens has a negative focal length and includes a first optically transparent member having a first surface and a second surface. The second lens is attached to the first lens at the second surface. The second lens has a positive focal length and includes a second optically transparent member having a third surface and a fourth surface. The second chromatic aberration of the second lens is reduced by the first chromatic aberration of the first lens. The second surface of the first lens includes a first Fresnel structure.

The invention provides a spectral confocal lens and a spectral confocal displacement sensor, and the spectral confocal lens sequentially comprises a dispersion lens group and a non-dispersion lens group from an image space to an object space. The dispersion lens group comprises a plurality of single lenses, and is used for generating axial dispersion. The non-dispersive lens group comprises at least one achromatic lens and is used for converging light and correcting aberration generated by the dispersive lens group; wherein the optical parameters of the non-dispersive lens group are configured to be separated from the dispersive lens group and are independently optimized, so that the dynamic balance between the imaging quality of the lens and the dispersion range is realized. According to the embodiment of the invention, the dispersion lens group and the non-dispersion lens group are respectively debugged and optimized, so that the dispersion range of the dispersion objective lens can be expanded, the aberration can be compensated, the imaging quality is remarkably improved, and the dynamic balance of high resolution and wide measurement range is realized.

The present application relates to a kind of bionic human eye vision system, belong to the cross-disciplinary technical field of biomedical and optics.The whole system is placed on unified optical platform, including white light source, linear motorized translation stage, observed target, band-pass filter, achromatic lens, polaroid, electrically controlled diaphragm, artificial lens, scanning lens, two-dimensional galvanometer, beam splitter, beam quality analyzer, full mirror, lens, high-sensitivity photodetector and computer.The advantage is novel structure, through high-sensitivity detector and feedback control circuit can realize automatic adjustment system light quantity size, prevent overexposure, through adjusting artificial lens and two-dimensional galvanometer can realize detecting different distance, different angle object, so as to simulate the basic function of human eye, can gather and process image in complex environment.

The application discloses a data-driven hyperbolic lens achromatic design method, which is characterized in that a data-driven reverse dispersion method is adopted to perform reverse dispersion engineering in multiple sub-bands divided by a working frequency band, and spatial multiplexing and global optimization are performed on all unit structures to obtain an overall structure of the hyperbolic lens which has optimal performance and continuous achromaticity in a super wide frequency band. Compared with the prior art, the application has an end-to-end efficient design capability, can realize excellent working performance of the hyperbolic lens, and effectively avoids the dependence of a traditional dispersion engineering method on dispersion regulation and control capability of integrated resonant units, thereby doubling the working bandwidth without sacrificing the performance of the hyperbolic lens, and significantly improving the design precision and efficiency through the data-driven method, thereby providing a new solution for wideband design of achromatic devices and having good application scenarios and prospects.