340 results about "Lens (optics)" patented technology

The invention relates to the technical field of ophthalmology optics, in particular to a myopia control lens optical system integrating ray tracing and aberration correction, which comprises a wavefront phase acquisition module, a wavefront feature statistics module, a ray tracing simulation module, a microstructure form regulation and control module and a feedback control module. According to the method, accurate identification and datamation description of wavefront change under a dynamic vision condition can be realized by acquiring an eyeball wavefront phase matrix, performing gridding partition analysis and extracting local phase offset amplitude and time sequence characteristics, and a light propagation path model is constructed by combining statistical characteristics of an abnormal wavefront region; the self-adaptive compensation is carried out on the local focus deviation, and the spatial distribution optimization of the refractive index and the curvature is further realized based on the microstructure form regulation and control, so that the real-time matching of the optical parameters and the wavefront state is maintained during the processing and use of the lens, and therefore, the imaging quality is stabilized, the visual definition is improved, and the myopia control reliability is enhanced.

The invention discloses a deep ultraviolet spherical catadioptric detection objective lens, and relates to the technical field of optics, the deep ultraviolet spherical catadioptric detection objective lens comprises a first lens group, a second lens group and a diaphragm, one side of the first lens group is arranged to be an object plane, the first lens group is located between the second lens group and the object plane, the first lens group is used for converging light and correcting residual aberration of the second lens group, and the diaphragm is arranged between the second lens group and the object plane. The diaphragm is arranged in the middle of the second lens group, and the second lens group and the diaphragm are used for correcting vertical axis aberrations such as coma of the system. The objective lens adopts a spherical catadioptric structure, can realize deep ultraviolet band application, has a large numerical aperture, the numerical aperture can reach 0.8, the smaller wavelength and the larger numerical aperture have higher resolution, so that smaller defects can be detected, the working distance can be greater than 10mm, and the detection precision is improved on the basis of realizing the large NA design. The length of the system is reduced, the number of original parts is reduced, only five lenses are needed, the structure is simple, and installation and detection are convenient.

The invention relates to the technical field of optics, in particular to a projection lens, a projection system and electronic equipment. The projection lens comprises a first lens group, an aperture diaphragm and a second lens group which are sequentially arranged from a projection surface to an image source surface along an optical axis, the first lens group has negative focal power, and the second lens group has positive focal power; the first lens group consists of a first lens, a first sub-lens group and a diaphragm front lens which are sequentially arranged from a projection surface to an image source surface along an optical axis; the first sub-lens group comprises at least one lens with negative focal power; the first lens and the diaphragm front lens respectively have positive focal power, and the first sub-lens group has negative focal power; the second lens group consists of a diaphragm rear lens and a second sub-lens group which are sequentially arranged from the projection surface to the image source surface along the optical axis; the second sub-lens group has positive focal power and comprises a group of balsaming lenses with positive focal power, and the diaphragm rear lens has negative focal power. The focusing range of the projection lens is larger than or equal to 500 mm.

The invention discloses a micro-structure lens evaluation method and a lens, and belongs to the field of ophthalmic optics. The method comprises the following steps: acquiring optical parameters of a microstructure lens and optical parameters of a reference lens, wherein the optical parameters comprise structural parameters and microstructure surface types; based on the structure parameters of the microstructure lens, the structure parameters of the reference lens, the first defocused spot size and the second defocused spot size, the evaluation coefficient of the microstructure lens is determined, the evaluation coefficient is used for representing the microstructure stimulation intensity of the microstructure lens, the first defocused spot size is the defocused spot size corresponding to the microstructure surface type of the microstructure lens, and the second defocused spot size is the defocused spot size corresponding to the microstructure surface type of the microstructure lens. The second defocused spot size is the defocused spot size corresponding to the microstructure surface type of the reference lens. According to the application, the evaluation coefficient of the microstructure lens is determined based on the optical parameters and the defocused spot size of the microstructure lens and the reference lens, so that the microstructure stimulation intensity of the lens can be directly represented through the evaluation coefficient, and the simplicity and convenience of verifying the microstructure stimulation intensity are improved.

The invention belongs to the technical field of infrared optics, and discloses a long-wave infrared continuous zooming microscope lens. The lens is provided with two lenses, namely a first lens and a second lens which are sequentially and coaxially arranged between an object plane and an image plane; the first lens is a meniscus positive lens of which the convex surface faces the image side, and the second lens is a meniscus positive lens of which the convex surface faces the image side; the first lens and the second lens can move between an object plane and an image plane so as to carry out high and low magnification switching. The long-wave infrared continuous zooming microscope lens can realize multi-magnification switching, and also has the characteristics of small number of lenses, large target surface and clear imaging; the working wave band is 8-12 [mu] m, the magnification factor is 0.2-0.6, the F number of the image space is 1.5, the number of pixels is 1280 * 1024, and the size of the pixels is 12 [mu] m.

The invention relates to an asymmetric scattering myopia control lens based on human eye visual behaviors, which is applied to the technical field of eye vision optics, and has the design core that an asymmetric visual behavior mode shown by human eyes in an actual visual task is deeply integrated into the optical design of the lens. Therefore, an asymmetric optical structure with scattering intensity distribution highly matched with individual visual habits is constructed. According to the lens, scattering characteristics can be accurately configured in a specific area of the lens according to a preset human eye visual behavior data model, especially in the lower half part of the lens, namely a visual field area corresponding to near-distance tasks such as near-distance reading, writing or electronic equipment use of a wearer; the scattering intensity is higher than that of the upper half part (corresponding to a far task view field area), so that the myopia control efficiency is remarkably improved, and meanwhile, the visual comfort and definition of a wearer are effectively considered.

An achromatic imaging optic (20) is used to image an output field (16a) along a beam path (23) of the imaging optic (20) into a target field (14) for use in DUV microlithography. The imaging optic (20) has a plurality of lenses (L1 to L13), each containing less than 5% lead oxide. At least one of the lenses (L5, L7, L9) is made of a high-dispersion optical material with an Abbe number less than 50. At least one of the lenses (L1 to L4, L6, L8, L10 to L13) is made of a low-dispersion optical material with an Abbe number greater than 50. This results in an imaging optic with simplified manufacturing. Depending on the design, the imaging optics can be part of an optical system of a projection exposure system as an illumination lens (20) or as a projection lens.

In a biometric identification system, a transparent body can have a curved platen surface. The curved platen surface can be removably contacted by an anatomy of a user. The anatomy can have an anatomical pattern. An illumination source can illuminate the curved platen surface with an illumination beam. The illumination beam can propagate away from the curved platen surface as a return beam having a beam pattern shaped to correspond to the anatomical pattern. An imaging lens can focus the return beam to form a real image of the beam pattern at an image location. Field-curvature-correcting sensor optics can include a sensor. The sensor can sense the real image of the beam pattern at the image location. The field-curvature sensor optics can include a planar sensor and an image-flattener lens. The field-curvature sensor optics can include a curved, convex sensor.

The invention relates to a method for producing a structure in the volume of an at least partially transparent material using a laser beam that is moved relative to the material, such that the structure (3) in the material (1) comprises modification bubbles which are formed in a uniform periodic or random arrangement in at least one plane within the volume. The invention is characterized in that a device for emitting a focused laser beam is moved at least in phases relative to the material by means of a multi-axis robot in order to introduce predetermined structures into the inner volume of the material, wherein the device (13) for emitting the focused laser beam (S) comprises at least one laser source, a lens as focusing optics, and a laser scanner.

The invention provides a fundus camera system integrated with adaptive optics and a correction method, and relates to the technical field of ophthalmology imaging. The fundus camera system comprises a beacon light source, an imaging light source and an imaging sensor; the device comprises a wavefront sensor, a wavefront correction device and a control module, and the wavefront correction device comprises a focusing lens group and a deformable reflector; the focusing lens group and the deformable reflector are arranged in the same light path from the beacon light source to human eyes and from the human eyes to the wavefront sensor; moreover, the control module executes a two-step closed-loop control strategy of first focusing and second correction: firstly, based on a first measurement result of the wavefront sensor, the focusing lens group is driven to move so as to compensate low-order aberration; and after the focusing is completed, the deformable reflector is driven to deform based on the subsequent measurement result of the wavefront sensor so as to compensate the high-order aberration in a closed-loop manner. On the basis of inheriting the advantage of rapid focusing in the prior art, the self-adaptive optical technology is further integrated, so that the limitation of high-order aberration on resolution is solved.

Illumination optics for projector systems having a high f-number light output. One projection system comprises a fiber input providing a first light, and a first illumination optics configured to alter the first light into a second light. The projection system comprises a Fourier lens assembly configured to receive the second light and to form a Fourier transform of the second light at an exit pupil of the Fourier lens assembly. The second light has a f-number between f / 10 and f / 30, the second light has a luminance uniformity between 75% and 90% of center, and the second light has a contrast over 10,000:1.

An implantable multi-photon optical probe includes a probe housing having a proximal end and a distal end implantable on a sample. The probe housing adapted to provide excitation energy to the sample and to collect emitted radiation from the sample. The probe housing includes scanning optics configured to receive excitation radiation, and to laterally and axially scan the excitation radiation over a field-of-view of the optical probe. A scanning lens is disposed in the probe housing configured to receive the excitation radiation from the scanning optics, and an objective lens reshapes and focuses the excitation radiation. A focusing lens is disposed to receive the excitation radiation and to focus the excitation radiation into the sample.

The invention discloses a pluggable polarization imaging system based on a metasurface and traditional optics and a construction method, and relates to the technical field of polarization imaging. When the metasurface is not inserted or pulled out, the polarization imaging system has a light intensity imaging function; when the super-structure surface is inserted into the imaging system, the polarization imaging system has a polarization imaging function; after the polychromatic light source is incident to the refraction lens of the imaging system, the polychromatic light source is focused and irradiated to the surface of the metasurface, different polarization components in the polychromatic light source are split and deflected to corresponding positions by the surface of the metasurface, and different polarization imaging focuses are formed on the pixel surface of the detector, so that polarization imaging is realized. The imaging system constructed by the invention not only solves the problems of huge volume and difficulty in integration of a traditional polarization imaging mode, but also solves the problems of large aperture and dispersion of a super-structure surface imaging mode, and the whole optical system can adopt different imaging modes for different scenes due to the pluggable characteristic.

The utility model relates to the technical field of optics, and discloses a lens surface roughness on-line detection device, which comprises a rectangular substrate; the driving structures are symmetrically and fixedly connected to the two sides of the base plate, each driving structure is composed of a hollow rectangular box with the top open and a worm, the fixing structures are arranged on the wall face of the base plate and used for fixing the position of a lens, each fixing structure comprises a lens containing plate, a through pipe, a suction pipe and an exhaust fan, and the lens containing plate is fixedly connected to the top of the base plate; the through pipe is fixedly connected to the bottom of the base plate, the suction pipe is fixedly connected to the bottom of the through pipe, the exhaust fan is installed at the bottom of the base plate, a lens can be placed on the top of the lens placing plate, the lens placing plate is made of rubber, and the fixing structure fixes the lens to the top of the lens placing plate through adsorption force generated when the exhaust fan sucks air for detection. In the process, the lens is placed and the sliding plate slides, and the problem that the lens is damaged in the fixing process is avoided.

This invention relates to the field of optics, specifically to a zoom lens and imaging device. The zoom lens, from the object plane side to the image plane side, consists of a first fixed lens group with positive optical power, a zoom lens group, an aperture stop, a second fixed lens group, a focusing lens group, and an auxiliary lens group. The zoom lens group and the focusing lens group move along the principal optical axis of the zoom lens. The first fixed lens group, from the object plane side to the image plane side, consists of a first fixed lens with negative optical power, a second fixed lens with negative optical power, a third fixed lens with positive optical power, and a fourth fixed lens with positive optical power. The zoom lens satisfies the following conditions: XG2 / ft > 0.5; ft / fw < 5; DG12max / DG35 > 1.8. This invention achieves a zoom lens that, while miniaturizing, improves the volume of the front lens group and the range of motion of the zoom lens group to a certain extent, increasing the zoom capability and resolving power of the zoom lens.

An optical lens, a transmitting module, a probe apparatus, and a terminal device, relating to the technical field of optics and serving to reduce the compressive deformation of lens pieces caused by lens barrels under high-temperature working conditions. The optical lens comprises: a lens barrel, a lens piece, and a spacer ring assembly; the edge of the lens is in local contact with an inner wall surface of the lens barrel; the spacer ring assembly comprises a first spacer ring and a second spacer ring, the first spacer ring and the second spacer ring being respectively in contact with two surfaces of the lens piece in the axial direction; in the radial direction of the lens piece, there is a first distance between the contact position of the first spacer ring and the center-of-gravity position of the lens piece, and there is a second distance between the contact position of the second spacer ring and the center-of-gravity position of the lens piece, the first distance being different from the second distance. On the basis of such structure, a combination of two forces applied by the two spacer rings to the lens piece will generate a certain moment on the lens piece. The moment can be used to reduce or offset the moment generated by a compressive force of the lens barrel on the lens piece under high-temperature working conditions, so as to reduce or eliminate the deformation of the lens piece caused by the compressive force of the lens barrel on the lens piece.

The present application relates to the field of information optics, more particularly, to a spatial structure vertical focal field generation method and system. The present application provides a spatial structure vertical focal field generation method, according to the constructed phase map of the spatial structure vertical focal field, the incident light beam is modulated into a cylindrical wave light beam at the light beam modulation, and then the cylindrical wave light beam is focused to generate a spatial structure vertical focal field. Wherein, the phase map only needs to be calculated according to the superposition of the column lens phase or the column lens phase and the flash grid phase, and the calculation amount and calculation time are obviously reduced compared with the iterative calculation of the existing method. The present application solves the problems of large calculation amount and long time consumption of the existing method for generating a spatial structure vertical focal field.

The utility model discloses a multiple adjustment night vision lens for optical experiments, which belongs to the field of optics and comprises a low-light night vision device composed of an objective lens, an image intensifier and an eyepiece, the objective lens is connected with the eyepiece through a connecting tube, and the image intensifier is located inside the connecting tube. Compared with the prior art, the utility model has the advantages that the distance between the objective lens and the image intensifier is adjusted through the engagement connection of the displacement thread at the outer wall end of the objective lens and the translation screw at the output end of the brushless motor, and the brushless motor is controlled by the remote control system; in this way, the angle needing to be rotated can be rapidly determined according to the displacement data of the displacement thread of the objective lens, and rapid rotation is completed through the brushless motor, so that the adjustment data of the magnification of the objective lens is greatly increased.

A probe for an IR or UV sensor is described which includes a light emitter and a detector comprising a lens. The detector detects the spectra of the emitted light after it has passed through a gas to be measured. The sensor of the present invention is particularly suitable for harsh or aggressive exhaust gas measurement environments, for example in ships, vehicles, chimneys etc., and includes purge gas protections for sensitive optical parts to prevent particles etc. from the exhaust gas from depositing on the optics. The sensor further has a sample gas flow from the gas to be measured which is adjusted so that the purge gas does not interfere with the measurements.

An optics assembly includes an eyepiece operable to receive virtual image light and project the virtual image light toward an eye side of the optics assembly. The optics assembly includes a rear lens disposed between the eyepiece and the eye side of the optics assembly. The optics assembly includes one or more wedge prisms integrated with the rear lens along a periphery of the rear lens. The optics assembly includes an eye tracking camera disposed outside the periphery of the rear lens in alignment with the one or more wedge prisms and operable to capture light that propagates from the eye side of the optics assembly and is refracted through the one or more wedge prisms.

The application discloses an SBS phase conjugation mirror capable of displaying a sound wave field in real time, and belongs to the technical field of nonlinear optics.The application comprises the following steps: pump light passes through a half-wave plate and a polarization beam splitter, passes through an optical isolator, changes a polarization state through a quarter-wave plate, is focused through a focusing lens, and then enters an SBS medium pool, stimulated Brillouin scattering occurs, a periodic density modulation is formed in the medium, and an equivalent acousto-optic grating structure is generated.Through introducing an independent probe light beam, the probe light enters the SBS medium pool at an incident angle satisfying the Bragg diffraction condition, and the probe light will be diffracted on the acousto-optic grating formed by the sound wave field.The intensity of the diffracted light changes with the intensity of the sound wave field, so that the real-time measurement of the sound wave field waveform and the life parameter in the SBS process can be realized by detecting the change of the diffracted light intensity with time.

The application belongs to the technical field of optics, and particularly relates to a condenser lens, a lamp and a condenser lens module. The condenser lens comprises, in sequence along the optical axis direction, an incident part for receiving and refracting light from a light source, a converging part for totally reflecting and converging the light refracted by the incident part, and an exit part for homogenizing and exiting the light converged by the converging part. The condenser lens is configured to make the difference between the beam angles of the light of different wavelengths after exiting be less than + / - 3 degrees. The application can make the light beams of different spectrums generated after passing through the same condenser lens have a small difference in exiting angle, solve the color layering problem of the light spot when the multi-color light sources are mixed, realize uniform light mixing, and only one set of condenser lens mold needs to be developed, thereby reducing the manufacturing cost.

The invention belongs to the technical field of ophthalmic optics, and relates to a design method of a personalized spectacle lens and the spectacle lens. The design method comprises the following steps: constructing a spectacle-eye joint mathematical model based on spectacle frame posture and eyeball rotation, and analyzing and calculating the mathematical model to obtain a theoretical diopter calculation formula of the lens surface under prescription diopter; based on the basic eye model, according to the prescription diopter, the posture of the spectacle frame, and the central diopters, refractive indexes and central thicknesses of the inner and outer surfaces of the lenses, constructing a lens-eye system comprising the lenses to be optimized and eye models with different rotation angles; calculating the actual diopter of the surface of the to-be-optimized lens based on the intersection point of the human eye visual axis of the eye model with different rotation angles and the surface of the to-be-optimized lens; taking the minimum absolute value of the difference between the actual diopter and the theoretical diopter of the surface of the to-be-optimized lens as a target, ensuring the imaging quality and machinability of the lens, and optimizing the parameters of the inner surface of the to-be-optimized lens to obtain the personalized spectacle lens considering the posture of the spectacle frame and the rotation of the eyeball.

An optical sensing system can include illuminator optics, including light source, a lens assembly, and an optical deflector capable of modifying an angle of light energy via angle skipping. The illuminator optics can be adapted or adaptable to optically scan non-sequential angle positions of a substance or substances carried by a scannable substrate including at a region of interest (ROI), a reference region of scannable substrate, or both. The system can also include imager optics including a detector to receive the light energy after interaction with the ROI, the reference region, or both associated with the scannable substrate. Other types of scanning are also disclosed that do not rely on angular light scanning or optics.

Vehicle light (1000), which includes the following: a substrate (1008); a lens (1002) wherein a lamp chamber (1022) is formed between the lens (1002) and the substrate (1008) to accommodate a light source (1024), wherein the lens (1002) has a horizontal axis (H) and a vertical axis (V), an alignment element (1014) which extends from the lens (1002) in at least three sections (1010) parallel to the substrate (1008), each of the three sections (1010) having an opening (1038) which is aligned with a corresponding opening (1028) in the substrate (1008); a two-axis adjustment mechanism (1030) comprising the following: three elements (1032, 1034, 1036), each element extending through the respective opening of one of the at least three sections (1010) and the corresponding opening in the substrate (1008), the three elements (1032, 1034, 1036) having the following: a fixed element (1032) which is fixedly connected to both the substrate (1008) and the alignment element (1014) and is arranged on both the horizontal (H) axis and the vertical (V) axis; a vertical adjustment device (1034) which is fixedly attached to the alignment element (1014) and movable with respect to the substrate (1008), wherein the vertical adjustment device (1034) is arranged on the horizontal axis (H) and is configured such that the lens (1002) can be adjusted with respect to the vertical axis (V); and a horizontal adjustment device (1036) which is fixedly attached to the alignment element (1014) and movable with respect to the substrate (1008), wherein the horizontal adjustment device (1036) is arranged along the vertical axis (V) and is configured such that the lens (1002) can be adjusted with respect to the horizontal axis (H); and a flexible skirt (1006) which frames a front surface (1004) of the lens (1002) from which light emerges without gaps, wherein the flexible skirt (1006) extends towards the substrate (1008) to enclose the lamp chamber (1022).

The invention provides a zoom type optical signal gain regulator and a circuit, the zoom type optical signal gain regulator comprises a support, the support is provided with a light-emitting part, a convex lens, a photoresistor and an adjusting part, the convex lens is arranged between the light-emitting part and the photoresistor, and the adjusting part is arranged between the light-emitting part and the photoresistor. The light emitting part is used for emitting parallel light to the convex lens and irradiating the parallel light on the photoresistor, the adjusting part is used for adjusting the distance between the photoresistor and the convex lens, and the focus of the convex lens is located between the photoresistor and the convex lens. According to the optical principle of focusing of the convex lens, the distance between the photoresistor and the convex lens is precisely changed through the adjusting piece, so that the light intensity irradiated on the photoresistor is continuously changed, the resistance value of the photoresistor is changed smoothly and is wide in range through the adjusting mode based on geometrical optics, stepless continuous gain adjustment is achieved, and the precision of the light intensity is improved. The adjusting precision is high.

A lens for a light fixture has a plurality of protrusions for spreading a beam of light from a light source of the light fixture. The protrusions enable the lens to be used in different light fixtures while providing similar beam characteristics. In some configurations, the lens comprises texturing to further shape the beam.

The invention relates to the technical field of microscopy optics, in particular to a spot scanning confocal adjusting system and method, light emitted by a light source is parallel light beams, the divergence angle is smaller than 1mrad, the light beams reach a galvanometer through a spectroscope, reach a target object through a scanning mirror set and an objective lens, return after being reflected by the target object, pass through the spectroscope capable of rotating, and then pass through a scanning mirror set. After being reflected, the laser reaches the confocal hole through the focusing lens; the confocal hole is located at the rear focus of the lens, and confocal imaging is achieved. According to the invention, through the rotatable spectroscope, the imaging condition of the target object at the confocal hole position can be observed by one camera at the same time. The technical problem that the position of the confocal hole is difficult to find if the initial position of the confocal hole is not within the view field range of the camera due to the fact that the confocal hole is small, a camera with a high amplification factor needs to be selected for clearly seeing the confocal hole and the image plane range which can be observed by the camera is very small in the debugging process is solved.

A UV-C projection unit comprises at least one solid-state UV-C light emitter, e.g., an array of UV-C LEDs, emitting UV-C radiation and projection optics such as a lens comprising high purity fused silica configured to transmit UV-C light to form a beam such as a collimated beam, the unit useable for projecting UV-C radiation onto, for example, cancerous tissue to potentially inactivate cancer cells. The UV-C radiation from the solid state UV-C light emitter, e.g., the array, may additionally or alternatively be coupled into and transmitted along an optical fiber to facilitate delivery of the light to the cancerous tissue. Various features are described herein for increasing the safety of such a UV-C projection unit and / or for applying such unit to the treatment of cancer.

The invention discloses an integrated detection device and method for the shape of a large-aperture long-focal-distance axis lens, belongs to the shape detection of an off-axis lens in precision optics, and aims to solve the technical problem that the shape parameters of the off-axis lens cannot be integrally detected. The device comprises a large-aperture plane interferometer, a to-be-measured lens, a large-aperture computer-generated hologram plate, an attitude alignment module and a precise distance measurement module. A main test area, an alignment area and an off-axis calibration area are arranged on the large-aperture computer-generated hologram plate; and the attitude alignment module and the precision distance measurement module are respectively configured on a tool of a lens to be measured and a tool of a computer-generated hologram plate. The detection method comprises the following steps of: obtaining a background wavefront of the computer-generated hologram detection cavity by adopting a large-aperture standard spherical lens; the pose adjustment of the large-aperture computer-generated hologram plate and the to-be-measured lens is completed based on the large-aperture plane interferometer; measuring the transmission wavefront of the lens to be measured and deducting the background wavefront; and measuring and calculating the rear intercept of the to-be-measured lens, and calculating the off-axis amount by combining the off-axis angle.