94results about How to "Eliminate spherical aberration" patented technology

The invention relates to a planapochromatically-corrected immersion microscope objective for high-resolution microscopy applications with changing dispersive immersion conditions, having a plurality of lenses and / or subsystems (T1, T2, T3) comprising lens groups and a corrective function (LA2) for eliminating spherical aberrations.According to the invention, the microscope objective has an additional corrective function (LA1) for eliminating longitudinal chromatic aberrations caused by dispersive changes in the immersion by changing the air gaps between the lenses or gap combinations, wherein the influence on the longitudinal chromatic aberration corresponds to a rotation of the curve s(λ), which describes the color point (s) as a function of the wavelength (λ).

A tunable micro-aspherical lens is disclosed, which employs two potential differences provided by two sets of electrodes to dynamically change the bottom area and the central height of the liquid polymer lens. The tunable micro-aspherical lens includes a tunable lens, a lower electrode plate, a hydrophobic pattern, an insulation layer and an upper transparent electrode plate. Also, a manufacturing method of a tunable micro-aspherical lens is disclosed, which includes forming a lower electrode plate, forming an insulation layer, determining a position of the tunable lens, controlling the bottom area and the central height of the tunable lens. The tunable micro-aspherical lens of the present invention eliminates spherical aberration and improves the focus spot resolution to shrink the focus spot and thus to provide better optical quality.

The invention discloses an ultraviolet image intensifier resolution testing device, which belongs to the performance testing field of photoelectric instruments. The device comprises an ultraviolet light source, a standard ultraviolet test reticle and an ultraviolet optical system. Under the irradiation of the ultraviolet light source, the standard ultraviolet test reticle can form ultraviolet test light beams containing standard reticles; after being collimated through an off-axis parabolic mirror of the ultraviolet optical system, the ultraviolet test light beams are focused on a photocathode face of a tested ultraviolet image intensifier by an imaging objective lens group in the catadioptric way. The problem about test on the resolution of the ultraviolet band image intensifier is solved; indirect technical support for improving the quality of the ultraviolet image intensifier is provided; and the device also has the advantages of no chromatic aberration, low spherical aberration, high test precision, and the like at the same time, and is convenient to use.

This invention discloses one light pick up optical system with wide visual angle, which orderly from object end to image end negative diopter rate first optical element, positive second optical element and negative third optical element set with one image sensor unit in imaging end; the pick up optical system meets the following formula, wherein, fp1 for second optical part focus distance and ft for pick up optical system focus distance.

A laser lighting system which employs visible and reflective laser beam lighting sources to provide illumination of airport runways and taxiways, preferred approach and departure routes, seaplane base landing areas, marine waterways, as well as to assist in search and rescue operations. The laser lighting system may be a laser lighting post or a laser lighting unit for providing radiation along a surface that includes at least one laser for producing a beam of coherent visible or reflective radiation, and a glass plano-convex cylindrical lens which has an aspherical convex cylindrical surface for generating a laser line which is uniformally illuminated from end to end. The laser lighting post includes a mounting column which has an access door for providing access to a tilt switch assembly and an AC / DC power adapter unit. The mounting column is attached to a base plate by a frangible coupling. The laser lighting unit includes a case containing a flashlight light bulb, at least one battery, and laser switch means for selectively energizing the laser via the at least one battery. The laser lighting unit also includes a light bulb switch means for selectively energizing the light bulb via the at least one battery. The laser lighting unit may also include an enlarged end to form a head having a front opening which is spanned by a parent lens. The laser lighting unit may also include a parabolic reflector.

The present invention provides an optical information medium capable of suppressing the influence of reflection light from an unnecessary information recording face and effectively eliminating spherical aberration at the time of recording / reproducing information to / from a recording medium having a plurality of information recording faces. When reflectance of an information recording face is αh and transmittance between information recording faces is th, ah and th of the optical information medium are set so as to satisfy ((α(h−1)2×α(h−2)) / (th2×αh))<0.01.

The invention discloses a tomographic imaging method based on an aplanatic super-structured lens, namely a chromatographic imaging technology utilizing wavelength coding based on a super-structured aplanatic lens. A light source probe (1), the aplanatic super-structured lens (2), a linear polarizer (3) and a quarter-wave plate can be taken as auxiliary optical elements to be inserted into an imaging system for directly improving a signal-to-noise ratio; a photoreceptor (5) is arranged on the imaging surface and is used for receiving an image; through relatively continuous irradiation of different wavelengths, the image surface information of wavelength coding is acquired, and then the tomographic image information of an object is obtained through a corresponding algorithm. According to themethod, a design principle of a super-structure surface is adopted, and the control of the color difference and the correction of the spherical aberration are realized by utilizing the phase.

The invention belongs to the technical field of microimaging, in particular to a lighting path of a plate lighting microscope and provides a lighting system of a plate lighting microscope with variable thickness and length of a plate. The system successively comprises a laser light source, a four-component mechanical compensation afocal zooming beam expanding system of a full spherical mirror, a cylindrical lens and a microobjective arranged along the optical axis from the object side to the image side; light emitted by the laser light source changes in aperture of a laser beam by means of theafocal zooming beam expanding system and then passes through the cylindrical lens rotating at 90 degrees by taking the optical axis as the rotating axis to form the plate light. The plate light undergoes subduction of spherical aberration generated by the afocal zooming beam expanding system and the cylindrical lens through a spherical aberration subduction microobjective, and the light intensityof the whole plate is more uniform; the plate lighting microscope can be used for observing biological samples in a certain dimensional range under the circumstance of not replacing the plate lighting system.

A bi-directional fiber optic transceiver includes a laser diode, a photodiode, first and second lenses, all of which share a common linear optical axis, and a housing. The first lens may have transmission increasing film thereon. The second lens may have a reflection increasing film thereon. An optical splitter may be between the first and second lenses. The first and / or second lenses may be spherical, hemispherical or aspheric. The transceiver size is reduced so that a circuit board can accommodate more components or be smaller in size. Utilizing hemispherical lenses can greatly increase the coupling ratio of the optical links between the photodiode, fiber and laser diode. Utilizing aspheric lenses with high coupling can serve high power output requirements. Use of spherical lenses (which extend the focal length) with aspheric lenses enables LD TO assemblies in individual housings to serve in various products.

The lighting system based on reflective compound eye includes light source, the first compound eye array and the second compound array. The first compound eye array has small central hole for setting the light source, the second compound array has opening in the center with planar reflector set outside the opening, and below the planar reflector there are successively collecting mirror, stripe polarizing beam splitter array, half-length plate and lighted image source. The present invention has the advantages of compact reflective compound eye structure, reduced lighting system size, controllable light outgoing angle and raised light distribution homogeneity, and is especially suitable for small lighting system and great divergence angle light source.

The invention discloses a high-resolution Scheimpflug lens. The invention belongs to the technical field of optical systems, and the lens comprises a first spherical lens with positive focal power, asecond spherical lens with negative focal power, a third spherical lens with negative focal power, a fourth spherical lens with positive focal power, a fifth spherical lens with positive focal power,asixth spherical lens with positive focal power, and a seventh spherical lens with positive focal power, which are sequentially arranged from the object side to the image side, and the diaphragm is located between any two adjacent lenses in the fourth lens, the fifth lens, the sixth lens and the seventh lens or located between the seventh lens and the image side. Under the design of the lens, theScheimpflug lens can meet the following conditions: TTL / IH is less than or equal to 13; TTL is the distance from the front surface of the first spherical lens to the image surface, and IH is the half-image height of the diagonal line of the rectangular detector; therefore, the miniaturized Scheimpflug lens can be prepared. The high-resolution Scheimpflug lens has the advantages of high resolutionand miniaturization.

An optical system for use in an optical pickup apparatus has a chromatic aberration correcting element having plural ring-shaped zones divided with a stepped section in such a way that one of the neighboring ring-shaped zones located apart from the optical axis has a longer optical path than the other one located closer to the optical axis, and an objective lens having plural ring-shaped zones divided with a stepped section shaped in the optical axis direction in such a way that the stepped section causes a optical path difference between light fluxes having passed through the neighboring ring-shaped zones. The ring-shaped zonal structure of the chromatic aberration correcting element corrects a deviation of a focal point caused by the objective lens due to a wavelength fluctuation of an incident light flux coming into the optical system.

A method and apparatus provide identification of a spherical error of a microscope imaging beam path in a context of microscopic imaging of a sample using a microscope having an objective. A coverslip that carries or covers the sample is arranged in the imaging beam path. A measurement beam is guided through the objective onto the sample in a decentered fashion that is outside an optical axis of the objective. The measurement beam is reflected at an interface of the coverslip with the sample and the reflected measurement beam is guided through the objective onto a detector. An intensity profile of the reflected measurement beam is detected with the detector and a presence of a spherical error from the intensity profile is determined qualitatively and / or quantitatively.

The present invention provides a microscope objective lens. The microscope objective lens comprises 14 sheets of spherical lenses which are arranged in a coaxial mode. The 14 sheets of spherical lenses comprise in order from an object side to an image side: a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), a seventh lens (L7), an eighth lens (L8), a ninth lens (L9), a tenth lens (L10),an eleventh lens (L11), a twelfth lens (L12), a thirteenth lens (L13) and a fourteen lens (L14). The microscope objective lens obviously increasesthe view field of the object side while ensuring the high numerical aperture and the high resolution to achieve apochromatism from 500nm to 800nm, greatly eliminates spherical aberration, coma, astigmatism, field curvature, distortion, chromatic difference of magnification and axial chromatic aberration, meets the flat field apochromatism objective lens demand and achieves the technical demand ofa wide field of view (namely a large visual field number and a low range) and a high numerical aperture.

The invention discloses an electrowetting liquid lens with multiphase gradient refractive-index change. The lens comprises a hollow transparent tube; each of the inner and outer sidewall of the transparent tube is coated with a conductive layer and a hydrophobic insulating layer from inside to outside; a transparent conductive substrate and a transparent conductive cover plate are fixedly arranged at the lower end and the upper end of the transparent tube respectively; and an inner cavity, enclosed by the transparent conductive substrate and the transparent conductive cover plate, of the transparent tube is filled with a conductive liquid layer and at least three types of non-polarity liquid layers, the conductive liquid layer is insoluble in the non-polarity liquid layers, and the refractive index of each non-polarity liquid layer is in gradient change, or the inner cavity is filled with a conductive liquid layer whose one phase of concentration is in gradient change and the non-polarity liquid layers insoluble in the conductive liquid layer. The hollow transparent tube is a quartz glass tube, the internal diameter of the transparent tube ranges from 0.001 to 10mm, the external diameter from 0.01 to 10mm, and the height from 0.01 to 10mm. The electrowetting liquid lens with multiphase gradient refractive-index change can overcome technical defects that a present electrowetting lens has chromatic and spherical aberration, is complex in structure and is difficult to manufacture, and that the optical axis is difficult to calibrate when multiple lenses are combined in use.

A projection lens including a reflective unit and a refractive unit is provided. The projection lens is disposed between an object side and an image side. The reflective unit is disposed between the object side and the image side and has a negative refractive power. The refractive unit is disposed between the object side and the reflective unit and has a positive refractive power. The refractive unit includes a first lens group and a second lens group. The first lens group is disposed between the object side and the reflective unit and includes at least one cemented lens and an aperture stop. The at least one cemented lens is disposed between the object side and the aperture stop. The second lens group is disposed between the first lens group and the reflective unit and includes at least one aspheric lens. A projection apparatus including the projection lens is also provided.

The invention provides a solar photovoltaic system, which comprises a photovoltaic battery and a sun tracker. A round optical condensation component for condensing light is arranged in front of the photovoltaic battery and comprises an incident face and an emergent face; the emergent face is provided with a plurality of sawtooth concentric rings which are connected in sequence; the radial widths of the sawtooth concentric rings are equal, and each sawtooth concentric ring comprises a first surface which is vertical to the emergent face and a second surface which is arc-shaped and aspherical; one end of the second surface is connected to the emergent face, and the other end of the second face is connected with the other end of the first surface; and each point coordinate on the second surface of the Nth sawtooth concentric ring is shown as (x,y) which meets a specific formula, and a light evener is arranged between the photovoltaic battery and the optical condensation component. The focal spots formed by the solar photovoltaic system are smaller in size and stable in formed position, the condensation ratio is high, the light spots are influenced by band numbers slightly, and the light spots received by the photovoltaic battery are even, thus the integral photoelectric conversion efficiency and flexibility of the photovoltaic system can be improved.

A compact reflector telescope has a spherical primary reflector and a secondary reflector with a negative lens interposed there between in axial alignment therewith. Light reflected from the primary reflector is passed through the negative lens and is diverted by the secondary reflector to a positive lens at the side of the telescope tube. The positive lens focuses the light rays onto an eye piece or ocular or onto a photographic emulsion or electronic detector. The telescope reduces or substantially eliminates spherical aberration and can be configured to have a focal ratio significantly greater than the focal ratio of the primary reflector. The telescope produces a flat field of view and an image which is substantially diffraction limited.

The invention discloses a display device comprising a display panel module and a back light module. The display panel module is provided with a display area. A first sub-display area and a second sub-display area, which are adjacent to each other, are disposed on the display area. The display panel module is disposed on the back light module. The display panel module is provided with a first average brightness and a second average brightness, after the light is reflected by the first sub-display area and the second sub-display area. The second average brightness is 1.2 times to 2 times of the first average brightness.

A camera lens (2, 3) for a portable electronic device includes an aspheric lens (20, 30) and at least one phase grating (21, 31). The aspheric lens includes a first optical surface (201) and a second optical surface (202). At least one of the two optical surfaces is an aspheric surface and at least one phase grating is formed with the aspheric lens in a whole. The phase grating is formed at one of the first optical surface and the second optical surface of the aspheric lens. The camera lens comprises a single aspheric lens having a phase grating. Because the camera lens does not comprise any spherical lens, spherical aberrations can be eliminated, and the volume of the camera lens can be reduced.

The invention discloses a parabolic two-dimensional focal X-ray compound refractive lens, which comprises a glass substrate and a mother mirror; the mother mirror comprises a mother mirror main body, a first parabolic cavity and square cavities which are orderly arranged on the mother mirror main body at intervals,and formed by connecting cross sections thereof, wherein the cross sections are twosymmetric parabolic openings; the first parabolic cavity is provided with a first paraboloid, each square cavity is embedded with a sub-mirror body with a cross section in square, a second parabolic cavity formed by connecting two symmetrical parabolic openings is arranged in the middle of the sub-mirror body, the second parabolic cavity is provided with a paraboloid, and the first paraboloid andthe second paraboloid are in mutual orthogonal structure. An optical axis is capable of performing self-calibration in high precision, the focusing efficiency is high, the precision of fabrication process is high, the limitation to the lens material is smaller, and the system design and assembling are simple.

The invention discloses a scanning flow type cell imaging analyzer. The scanning flow type cell imaging analyzer comprises a liquid flow focusing module, an optical signal excitation detection module,a scanning galvanometer, an acquisition and control board card and an upper computer. Laser is focused into light spots smaller than cells in size, cell imaging is achieved through light spot scanning, the power density of an imaging light source can be improved, and fluorescence is effectively excited; when a scanning excitation mode is adopted, laser full light spots are used for imaging, an overall excitation effect is achieved, and the situation of uneven distribution does not exist; and meanwhile, a problem that the imaging quality is reduced due to non-uniform excitation of light spot power caused by unstable liquid flow can be solved. According to the invention, the detection pinhole is formed in the focal plane of the objective lens, so that stray light outside the focal plane canbe blocked, and spherical aberration and chromatic aberration are eliminated; a photomultiplier is adopted to collect optical signals, and weak signals can be amplified; and compared with a traditional CCD imaging sensitivity, the sensitivity is greatly improved.

The invention relates to a high-resolution large-fov (field of view) zoom projection lens. An optical system lens group comprises a front compensation lens group, a variable-magnification lens group, a rear compensation lens group and a rear fixed lens group which are arrayed in sequence along the optical axis from a screen to an image plane DMD (digital micro-mirror device) chip; the variable-magnification lens group is the positive focal-length group component; the front compensation lens group and the rear compensation lens group are the negative focal-length group components; the rear fixed lens group is the positive focal-length group component; the front compensation lens group comprises three lenses; the variable-magnification lens group comprises two lenses; the rear compensation lens group comprises two lenses; the rear fixed lens group comprises six lenses; and the rear fixed lens group is provided with a diaphragm. The focal power of each lens group is distributed reasonably, and the high-resolution large-fov zoom projection lens has a compact structure, a large fov, a high resolution and a good image forming effect, can achieve a significant effect when being used for projecting images on a 2-4k DMD chip based large screen, adopts the materials being easy to process and is suitable for bath production.

The invention belongs to the technical field of Reynolds stress measurement systems, and particularly relates to a compressible Reynolds stress measurement system based on a composite schlieren technology. According to the technical scheme, the compressible Reynolds stress measurement system based on the composite schlieren technology comprises a light source subsystem, a first main reflecting mirror, a second main reflecting mirror and an imaging subsystem which are sequentially arranged according to the sequence from light emission to light receiving, and the connecting line of the light source subsystem, the first main reflecting mirror, the second main reflecting mirror and the imaging subsystem is in a Z shape, The imaging subsystem comprises a rectangular pyramid knife edge. The invention provides the compressible Reynolds stress measurement system based on the composite schlieren technology.

The invention discloses an optical path structure of a two-channel OCT (optical coherence tomography) sample arm in a posterior segment and an anterior segment of an eye. The optical path structure comprises three optical paths: an anterior segment OCT sample arm optical path, a posterior segment OCT sample arm optical path and an iris imaging optical path. According to the structure, imaging modes of the anterior segment and the posterior segment are switched through the rotation of a dichroic mirror, thereby avoiding the secondary attenuation of the signal intensity by a conventional beam splitter, and each OCT imaging mode can be assisted to be calibrated by the LED illuminated iris imaging optical path.

The present invention provides an optical information medium capable of suppressing the influence of reflection light from an unnecessary information recording face and effectively eliminating spherical aberration at the time of recording / reproducing information to / from a recording medium having a plurality of information recording faces. When reflectance of an information recording face is αh and transmittance between information recording faces is th, αh and th of the optical information medium are set so as to satisfy ((α(h−1)2×α(h−2)) / (th2×αh))<0.01.

The present invention relates to a one-dimensional X-ray combined lens, including lens main body and substrate positioned in the lower portion of lens main body. On the described lens main body several through-hole-like air gap units which are arranged according to straight-line order and have identical form are cut, and the described lens main body is made of aluminium material or aluminium oxide material, and said lens substrate is organic glass or glass material, and the thickness range of the described lens is 500microns-2000microns.

An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having specifically wavelengths for recording and reading information, wherein, a side of the objective lens has a plurality of ring-shape grooves with stated depth to reduce the beam spot spherical aberration of the objective lens focusing on the optical recording media recording surface. The optical pickup apparatus eliminates the spherical aberration generated when an optical recording medium having a different thickness.