1378 results about "Microscope objective" patented technology

The invention relates to a superwide-angle lens optical system having a long back-focus lens arrangement and comprising a relay lens group. The optical system is constructed of, in order from an object side thereof, an objective lens group Ob having positive refracting power, a primary image-formation plane formed by the objective lens group Ob and a relay lens group R1 having positive refracting power. A field stop FS is positioned at or near the primary image-formation plane, and condition (1-1) is satisfied.

h/f_o>1.8  (1-1)

Here f_o is the focal length of the objective lens group Ob, and h is the diameter of an image circle on the primary image-formation plane.

The invention relates to a high-collimation solar simulator optical system with an auto-collimation aiming system, belonging to a solar simulator optical system in the technical field of optics design and aiming at solving the technical problem of providing a high-collimation solar simulator optical system with the auto-collimation aiming system. The high-collimation solar simulator optical system with the auto-collimation aiming system comprises a xenon lamp source, an ellipsoid condenser, a plane mirror, an optics integrator assembly, a first dispersion prism, a second dispersion prism, an emission reticle, an LED light source, an aiming reticle, an ocular lens and a collimator objective. On the basis of the traditional high-collimation solar simulator optical system, an auto-collimation aiming system is added on an optical path of the optical integrator assembly, wherein the auto-collimation optical system comprises a first dispersion prism, a second dispersion prism, an emission reticle, an LED light source, an aiming reticle and an ocular lens. The invention can ensure more accurate zero calibration so as to eliminate the man-made influence and achieve better experimental effect.

A method for 3D imaging of a biologic object (1) in an optical tomography system where a subcellular structure of a biological object (1) is labeled by introducing at least one nanoparticle-biomarker. The labeled biological object (1) is moved relatively to a microscope objective (62) to present varying angles of view and the labeled biological object (1) is illuminated with radiation having wavelengths between 150 nm and 900 nm. Radiation transmitted through the labeled biological object (1) and the microscope objective (62) within at least one wavelength bands is sensed with a color camera, or with a set of at least four monochrome cameras. A plurality of cross-sectional images of the biological object (1) from the sensed radiation is formed and reconstructed to make a 3D image of the labeled biological object (1).

An endoscope having an insertion portion to be inserted into an object to be observed, includes: a substantially tubular holder member mounted to the insertion portion and having an open front end portion including a shoulder surface surrounded by an axial wall; a lens barrel holding an objective lens system and received in the holder member; and a light-transmissive closure member fitted into a front opening defined by the axial wall, and fixed to the front opening by a bonding agent interposed between an outer circumferential surface of the closure member and an opposing inner circumferential surface of the open front end portion of the holder member, wherein a space axially adjoining the shoulder surface is defined between an outer circumferential surface of a front end portion of the lens barrel and an opposing inner circumferential surface of the holder member.

Improvements to the acquisition and replay systems for direct-to-digital holography and holovision are described. A method of recording an off-axis hologram includes: splitting a laser beam into an object beam and a reference beam; reflecting the reference beam from a reference beam mirror; reflecting the object beam from an illumination beamsplitter; passing the object beam through an objective lens; reflecting the object beam from an object; focusing the reference beam and the object beam at a focal plane of a digital recorder to form an off-axis hologram; digitally recording the off-axis hologram; and transforming the off-axis hologram in accordance with a Fourier transform to obtain a set of results. A method of writing an off-axis hologram includes: passing a laser beam through a spatial light modulator; and focusing the laser beam at a focal plane of a photorefractive crystal to impose a holographic diffraction grating pattern on the photorefractive crystal. A method of replaying an off-axis hologram includes: illuminating a photorefractive crystal having a holographic diffraction grating with a replay beam.

The invention relates to a method for preparing a hydrophobic micro-structure on the surface of organic glass through a femtosecond laser, and the main process is as follows: a light beam transmitted by the femtosecond laser is irradiated to the surface of the organic glass after being focused by a microscope objective, as a light spot after focusing is very small and the power density is very high, and an ablation region which is equivalent to the scale of the light spot can be formed in an irradiation region; and furthermore, three-dimensional precision control can be further performed on a platform for placing a sample through a computer program, so that the periodic micron dimension micro-structure can be generated on the organic glass surface by utilizing the laser processing technology. Through the detection by a contact angle tester, the micro-structure has a very obvious hydrophobic characteristic; and furthermore, the wetness degree of water drops on the surface is related to the period and the type of the micro-structure. The manufacturing process of the invention is simple, raw materials are low in cost, the parameter selectivity and the controllability are very high, and the hydrophobic micro-structures in different sizes and patterns can be prepared on the surface of the organic glass.

The invention relates to a device and method for detecting the topological charge number of vortex beams based on an improved Mach-Zehnder interferometer, and belongs to the technical field of digital holography. The device comprises a semiconductor laser unit, a microscope objective spatial fiber, a collimating lens, a beam splitter prism I, a plane mirror, a beam splitter prism II, a spatial light modulator, a beam splitter prism III, a beam splitter prism IV and a photoelectric coupled device. According to the method, one arm of the device is used for generating the vortex beams to be used as object light, the other arm of the device is used for generating the vortex beams to be used as reference light, the holographic interferometry principle is used for recording the wave front phase information of the vortex beams in an interference fringe mode, phase distribution is digitally reconstructed in the later period, and the topological charge number of the vortex beams can be obtained according to the reconstructed phase distribution in accordance with the definition of the vortex beams. The device and method solve the problem that at present, specific instruments or equipment is needed in the method for detecting the topological charge number of the vortex beams, or an existing detecting method is complex to operate, poor in stability and low in reliability.

A microscope system includes a plurality of objectives with different magnifications and a focus adjustment device that adjusts a focus position of the objective. The focus adjustment device starts executing the focus adjustment operation as the user operates the AF button. Even when no instruction to start the focus adjustment operation according to operation of the AF button is issued, the focus adjustment operation can be started when the user operates the objective selection switch to switch over from the low magnification objective to the high magnification objective.

The invention provides a three-dimensional optical tweezers system. The system comprises a laser output unit, a spatial light modulator, a laser converging unit, a sample cell and a main observation unit, wherein the laser converging unit comprises a converging unit lens assembly and a front objective lens; the converging unit lens assembly is used for expanding each laser beam output by the spatial light modulator; the front objective lens is used for converging each expanded laser beam into the sample cell; the main observation unit comprises a visible light source, a rear objective lens and a main observation unit, namely a charge coupled device (CCD); the optical axes of the visible light source, the front objective lens, the rear objective lens and the main observation unit CCD are collinear to form a main optical axis; the sample cell is positioned between the front objective lens and the rear objective lens and is adjacent to both the front objective lens and the rear objective lens; both the front objective lens and the rear objective lens can move along the main optical axis; and the visible light source is positioned on the main optical axis of the front objective lens. By the system, a three-dimensionally distributed light trap can be observed under the condition that one surface of the sample cell is non-transparent. The system is particularly suitable for observation and operation of a biological living sample.

An optical pickup apparatus for performing recording, reproduction and deletion of information onto each of three types of optical recording mediums including light sources of a blue wavelength zone, light sources of a red wavelength zone and light sources of an infrared wavelength zone. The optical pickup apparatus also has a single object lens which condenses a light from any of the light sources and a single aberration correction device disposed in a common light path between each of the light sources and the object lens.

The invention relates to a multifunctional biomedical microscope with the functions of laser scanning confocal imaging, fluorescence imaging and optical coherence tomography. The multifunctional biomedical microscope is composed of a light source component, a two-dimensional scanning component, a zoom objective component, a confocal signal detecting component, an interference arm component and an interference signal detecting component. According to the multifunctional biomedical microscope, a confocal image of a sample is obtained by the introduction of a visible-light source lighting sample, a fluorescence image of the sample is obtained by the introduction of a fluorescence light source lighting sample, and an optical coherence tomography image of the sample is obtained by the introduction of a broadband low-coherence near-infrared laser light source lighting sample, and the multifunctional biomedical microscope is realized so as to obtain a micro-scale three-dimensional organization structure image of a transparent or non-transparent sample.

The invention aims to make it unnecessary to reposition an objective lens when repeatedly carrying out examinations. It is possible to carry out in vivo examination of tissue such as cells and muscle tissue or various internal organs, such as the heart, liver, and so forth, of mammals, especially small experimental animals, over a comparatively long period of time. A microscope system having an objective optical system unit and a structure or member for fixing the objective optical system unit to a living body is provided.

The present invention provides a fundus camera lighting system and a fundus camera. The fundus camera lighting system comprises at least one light source and a light reflecting structure; the light source is arranged inside a lens cone and positioned on one side of a central axis inside the lens cone; and the light reflecting structure is arranged in the lens cone, opposite to the light source andused for reflecting light rays emitted by the light source out, and after the light source passes through an eye piece group or an eye piece objective lens arranged in the lens cone, the light sourceimages outside the lens cone. Compared with the internal illumination mode in the prior art, the fundus camera light system does not need to independently arrange parts outside the lens cone, and thefundus camera is smaller in size and simpler to assemble.

A removable optical device with at least one lens for releasable attachment to a microscope suited for contact-free observation of an eye, which can be arranged between the objective of the microscope and the eye in the optical axis of the microscope. A drive device is provided, with which the lens can be adjusted along the optical axis of the microscope, whereby an electric drive motor is integrated in the removable device, which, together with the device, can be detached from the microscope and sterilized by suitable methods.

The invention discloses a detector of properties of a gate line of a solar cell piece. The detector is characterized by comprising a mirror column, a baseplate, an image acquisition optical system, a control mechanism and a micro-displacement distance measurement device, wherein an object lens in the image acquisition optical system is arranged above a table top of a working table in the control mechanism, the working table in the control mechanism is of a three-axis linkage working table which can move in x direction, y direction and z direction, a digital display dial indicator in the micro-displacement distance measurement mechanism is connected with a z-direction table plate in the three-axis linkage working table, a measuring end of the digital display dial indicator is in vertical leaning connection with the baseplate of the detector, and the image acquisition optical system comprises a high-power plano-field semi-apochromatic objective epi-Kohler illumination light path structure. The device is high in detection precision, in line with the detection requirements of a silver electrode of the gate line, reliable in data, small in occupied area, simple in structure and convenient to operate; the instrument has fast detection speed, the average each-point detection time is 4 seconds, and the detection requirements can be achieved; and the detector is convenient to use and low in cost.

The invention discloses a double-channel balance level which can effectively improve the level measurement precision, the reliability and the working efficiency. The double-channel balance level is provided with a shell, wherein the shell is movably connected to a base through a vertical shaft; a circular balance level and a horizontal placing device are fixed on the shell; a first objective lens and a first focusing lens are sequentially arranged at one transverse end in the shell along the horizontal direction from outside to inside; a second objective lens and a second focusing lens which are coaxially symmetric with the first objective lens and the first focusing lens are sequentially arranged at the other transverse end in the shell along the horizontal direction from outside to inside; an axial double-surface image acquisition device is arranged in the axial middle parts of the first focusing lens and the second focusing lens; a reading device is arranged in a manner of corresponding to the axial double-surface image acquisition device; connection lines of optical centers of the first objective lens, the first focusing lens, the second objective lens, the second focusing lens and the axial double-surface image acquisition device are coaxial.

The invention relates to a super-resolution fluorescent digit holographic sectioning microimaging system and method and belongs to the field of fluorescent digit holographic and super-resolution imaging. Laser after amplitude modulation through a spatial light modulator loading a proper mask structure enters a microobjective to generate exciting light in a three-dimensional structure on a to-be-image sample; excited fluorescence of the sample is collected by the microobjective, and is then diffracted and divided and shifted in phase through the spatial light modulator through a dichroscope and an imaging system, and the two beans of light intervene in a position where an image detector is located to form a hologram which is recorded; the recorded hologram is reconstructed through a numerical algorithm in a computer, and for a structure in certain depth in the sample, reconstructed images of super-resolution and optical section can be separately acquired; the reconstructed images of super-resolution and optical section are fused by means of the numerical algorithm, so that super-resolution optical sectioning imaging is realized; and the reproducing distance of the hologram is changed, so that three-dimensional imaging of the super-resolution optical sections of structures in different depths of the sample can be realized.

The present invention relates to an objective lens, an optical pickup, and an optical information processing apparatus. Although coma aberration of approximately 0.22 λ rms, 0.14 λ rms, and 0.09 λ rms is generated in a case where blue type, DVD type, and CD type media is tilted 1 degree, respectively, the coma aberration from medium tilt can be corrected by lens tilt by using an objective lens satisfying the conditions of |CLx/CDx|≧1, wherein CDx (x=1,2,3) is the value of each least square error (unit: λ rms) of the third order coma aberration components generated per angle when the substrates of the medium is tilted, wherein CLx (x=1,2,3) is the value of each least square error (unit: λ rms) of the third order coma aberration components generated per angle when the objective lens is tilted during the converging and irradiating to the medium.

The invention relates to an optical element gravity deformation draught head compensating device in projection objective system and a method thereof, solving the problems that the existing optical element gravity compensating device is difficult to mount and debug, manufacturing cost is high ad central region compensation of optical element can not be realized. The device comprises a first lens barrel unit assembly, a second lens barrel unit assembly, a space ring, a first gas pressure sensor, a second gas pressure sensor and a third gas pressure sensor; wherein the space ring is arranged between the first lens barrel unit assembly and the second lens barrel unit assembly. The method includes that the gas pressure sensor detects the pressure in a seal cavity, a signal is input to a main controller by virtue of a data acquisition card; the main controller adjusts the working states of a gas supply pipeline and an exhaust pipeline, and further optical element gravity compensation is realized. The invention is applicable to optical element gravity compensation of deep ultraviolet projective photoetching objective system.

The invention discloses a microporous laser pellet processing method and a device based on temperature rise regulation and control. Micro cutting plays an important role in micro-target structure manufacturing, but the processing efficiency is low, and contact force can be generated; therefore, micro cracks are easily caused on a pellet; in a working process, cuttings, slag and the like enter the cavity of the pellet, so that the cuttings and the slag in the pellet cannot be removed thoroughly, and the subsequent use of the pellet is affected. The method disclosed by the invention comprises the steps of perforating the pellet by ultraviolet laser, ultrashort pulse laser or femtosecond laser; adjusting the repeating frequency, the power and the pulse width of laser through a laser device power supply; monitoring the pellet processing condition in real time through a high-resolution CCD (charge coupled device); focusing laser to the surface of the pellet to be processed through a microscope; placing the pellet onto a sucking disk with a heating function, controlling a three-dimensional precision micro workbench on the sucking disk to move in three directions, X, Y and Z to realize micro adjustment on the pellet. The microporous laser pellet processing method and the device are used for processing under a condition of preventing the cuttings and the slag from entering the pellet.

An image pickup unit which consists of an objective optical system and a solid-state image pickup device: the objective optical system being composed of a first negative lens unit comprising a first meniscus lens element having a convex surface on the object side and negative power, a second positive lens unit comprising a convex lens element and an aperture stop disposed between the first lens unit and the second lens unit and this image pickup unit having a small outside diameter, allowing a field angle to be changed little due to variations of parts and an assembling variation, and having a maximum field angle of 150° or larger.

A LiDAR system has a field of view and includes a polarization-based waveguide splitter. The splitter includes a first splitter port, a second splitter port and a common splitter port. A laser is optically coupled to the first splitter port via a single-polarization waveguide. An objective lens optically couples each optical emitter of an array of optical emitters to a respective unique portion of the field of view. An optical switching network is coupled via respective dual-polarization waveguides between the common splitter port and the array of optical emitters. An optical receiver is optically coupled to the second splitter port via a dual-polarization waveguide and is configured to receive light reflected from the field of view. A controller, coupled to the optical switching network, is configured to cause the optical switching network to route light from the laser to a sequence of the optical emitters according to a temporal pattern.

A diffractive optical element, comprises a first diffractive structure to generate n₁₁-th order diffracted ray when a first light flux having λ1 (nm) of a wavelength comes in and to generate n₂₁-th order diffracted ray (n₁₁.≧n₂₁) when a second light flux having λ2 (nm) (λ2>λ1) comes in; and a second diffractive structure to generate n₁₂-th order diffracted ray when the first light flux comes in and to generate n₂₂-th order diffracted ray (n₁₂.≧n₂₂) when the second light comes in. The diffractive optical element satisfies the following formula: δφ_A12≠δφ_B12, where δφ_A12={n₁₁·λ₁/(N₁₁−1)}/{n₂₁·λ₂/(N₂₁−1)}, and δφ_B12={n₁₂·λ₁/(N₁₂−1)}/{n₂₂·λ₂/(N₂₂−1)}, wherein N₁₁, N₂₁ are refractive index of the first diffractive structure respectively for λ₁ and λ₂, and N₁₂, N₂₂ are refractive index of the second diffractive structure respectively for λ₁ and λ₂.

An optical pickup includes: a first emitting unit to emit an optical beam of a first wavelength; a second emitting unit to emit an optical beam of a second wavelength; a third emitting unit to emit an optical beam of a third wavelength; an object lens to condense optical beams emitted from the first through third emitting units onto a signal recording face of an optical disc; and a diffraction unit provided on one face of an optical element or the object lens positioned on the optical path of the optical beams of the first through third wavelengths; wherein the diffraction unit includes a generally circular first diffraction region provided on the innermost perimeter, a ring zone shaped second diffraction region provided on the outer side of the first diffraction region, and a ring zone shaped third diffraction region provided on the outer side of the second diffraction region.

The invention relates to a projector (1) for projecting an image (6), comprising: a light source (2) for generating a light bundle (12); a pivotable deflection unit (3) designed for deflecting the light bundle (12) generated by the light source (2) onto a projection surface (5); and an imaging device (7, 8, 9) for imaging an aperture of the deflection unit (3) onto the projection surface (5); wherein the imaging device (7, 8, 9) comprises a mirror objective (7) having at least two mirror elements (8, 9). The invention further relates to a corresponding method.

The invention discloses a tumor microvascular imaging instrument and a tumor microvascular imaging method. The tumor microvascular imaging instrument comprises an infrared confocal imaging part and a control part, wherein the infrared confocal imaging part comprises a near-infrared laser, a dichroscope, a two-dimensional scanning galvanometer, a scanning lens system, an imaging objective, a near-infrared fluorescence filter, a convergent lens, a pinhole and a detector; the scanning lens system is composed of a field lens and a cylindrical lens; the control part comprises a two-dimensional scanning control module which is used for controlling the two-dimensional scanning galvanometer, a signal amplification and acquisition module and a data processing and image displaying module; near-infrared quantum dots that a fluorescence excitation spectrum ranges from 1000nm to 1350nm and a fluorescence emission spectrum ranges from 1350nm to 1500nm are injected to blood vessels of a to-be-observed living body; and then a tumor part of the living body is observed under the tumor microvascular imaging instrument. According to the tumor microvascular imaging instrument and the tumor microvascular imaging method provided by the invention, complete three-dimensional imaging of tumor microvessels of the living body can be implemented with a high resolution.

The invention discloses a lithography projection objective with large view field and wide spectral line. The image of a mask is focused and imaged on a silicon chip; and a front lens group, an aperture diaphragm and a rear lens group are sequentially arranged along an optical axis from the mask. The front lens group consists of three lens groups, and the rear lens group is symmetrical to the front lens group relative to the aperture diaphragm. The half view field of the image space of the photolithography objective with large view field and wide band is 100 millimeters; the lithography projection objective is suitable for bands of lines g, h and i, can collect enough spectral energy of a mercury lamp, and is convenient for achieving relatively high yield; the numerical aperture of the objective reaches 0.1; and the objective can be used for exposing fine lines, has simple structure, and only comprises 16 to 18 lenses.

The invention discloses an image pickup objective lens optical system used for looking inside. The system includes a first lens unit, a diaphragm and a second lens unit arranged successively from an object side to an image side. The first lens unit includes a first lens and a second lens. The second lens unit includes a third lens and a fourth lens. Besides, a following conditional expression is met. f/H(L1r1)<1.8; H(L1r1)/IMH<0.8; TTL/f<5.5; BF/f>1.2, wherein f indicates the focal length of the image pickup objective lens optical system used for looking inside; H(L1r1) indicates a length of main light beams corresponding to the maximal image height when the main light beams pass through a face on the object side of the first lens unit in regular observation; IMH indicates the maximal image height on a corresponding chip light sensing face in regular observation; TTL indicates the distance between a face of the object side of the first lens in an optical axis and the chip light sensing face; and BF indicates the distance between a face of the image side of the fourth lens in the optical axis to the chip light sensing face. The image pickup objective lens optical system used for looking inside has characteristics of small diameter, wide view angle and installation convenience.

The invention discloses a compact polarization imaging camera wide in field of view. The distance between the last lens face of an object lens and each image sensor is larger than the focal distance of the object lens. A plurality of beam splitters are arranged between the object lens and the image sensors. After a light beam is divided into a plurality of light beams, each light beam is imaged to one corresponding image sensor through one linear polarizer, wherein the number of the light beams equals that of the image sensors. Because a long rear working distance object lens is formed by a front negative lens assembly and a rear positive lens assembly, under the conditions of the small focal distance of the object lens and a large imaging field angle, the distance between the object lens and each image sensor can be effectively increased, the beam splitters, a plurality of polarization elements and the image sensors can be placed on the space, and the size of a splitting type amplitude measurement-polarization imaging system can be effectively reduced.

The invention discloses an optical coherent confocal microscopy endoscope system and a realizing method. A section of 4F optical system is added to an OCT scanning imaging end; the section of optical system is conveniently used in an endoscope chamber, so that the pore diameter of an optical fiber of a sample arm is less than a minimal beam diameter (namely, minimum resolution of objective lens) on an imaging surface and the system has a confocal imaging effect; thus, the OCT resolution ratio can be obviously promoted while the imaging depth is not obviously reduced; the imaging effect similar to the confocal imaging effect can be achieved under the inexistence of dyeing; an MEMS micro-vibration mirror is combined for use, a GPU/FPGA algorithm is adopted and the present endoscope system is integrally used, so that the optical coherent confocal microscopy endoscope system can become a medical diagnosis tool with high speed, no dyeing, high sensitivity and specificity.