93results 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).

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.

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 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 relevant technical field of zoom optical lenses and discloses liquid-filled varifocal glasses with a manual focusing function. The liquid-filled varifocal glasses comprise a glass body, two lenses arranged on the glass body at interval and a transparent film, wherein each lens comprises an inner lens and an outer lens; a first sealed cavity is formed between the transparent film and the inner lens and is filled with transparent liquid; a liquid through hole communicated with the first sealed cavity is formed in the inner lens; and a liquid channel communicated with the first sealed cavity through the liquid through hole is formed in the lens body. According to the liquid-filled varifocal glasses, the transparent film deforms by changing the volume of the transparent liquid in the first sealed cavity to achieve focusing; the liquid channel is arranged in the glass body and the liquid channel does not pass through a connection part, so that the structure reliability is improved, and the liquid-filled varifocal glasses are simple in structure and relatively high in flexibility.

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 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.

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 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.