471 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.

A vehicle marker lighting device includes a light source. The light source has an elongate light pipe with a first end operatively coupled to the light source and a second end having a metalized surface. The light pipe further has a plurality of prism optics extending into an outside surface of the elongate body. An inner lens is operatively coupled to the light pipe to receive light reflected from the plurality of prism optics and to output the light beam.

One or more reduced, same form, light emitting apparatus(es) spaced apart and configured to be mounted at various heights and / or spacing employ the same power consuming light source input that is covered by a symmetrical or asymmetrical redirecting linear lens optics apparatus that is configured for use in a range of mounting heights to uniformly illuminate at least one legal path of egress below. An exemplary light apparatus is a horizontally rotatable device configured to project an illuminated directional building evacuation symbol / text / image onto an illuminated egress path below.

The invention discloses a ghosting detection method, a ghosting detection device and a ghosting detection system, and belongs to the field of optics. The ghost image detection method comprises the following steps: calculating at least one actual ghost image parameter based on an obtained actual main image and an actual ghost image; performing simulation imaging on the initial image based on module parameters of the target lens module to obtain a simulation main image, at least one simulation ghost image, at least one simulation ghost image parameter corresponding to the simulation ghost image and an imaging reason corresponding to each simulation ghost image; and matching the at least one actual ghost image parameter, the at least one simulation ghost image parameter and the imaging reason corresponding to each simulation ghost image, and determining the imaging reason corresponding to each actual ghost image. According to the ghost image detection method provided by the invention, the specific reasons generated by each ghost image can be quickly and accurately determined, the calculation efficiency and precision are relatively high, the operation is simple, and the use threshold is relatively low.

A digital adaptive optics encoder module includes an input mounting flange, a collimating lens, a bandpass filter, digital adaptive optic elements, refocusing lens, an output mounting flange, and a housing. The input mounting flange is capable of attaching to a telescope. The collimating lens is capable of expanding light from a target to fill a plurality of primary apertures. The bandpass filter has a bandwidth ranging from about 40 nm to about 100 nm. The digital adaptive optic elements include the plurality of primary apertures, an optical spreader, a focusing optic, and a detector. The refocusing lens is capable of refocusing an output from the digital adaptive optic elements onto a sensor plane. The output mounting flange is capable of attaching to an output connection. The housing encloses all of the interior components of the digital adaptive optics encoder module.

The utility model belongs to the technical field of optics, and particularly relates to a large-magnification infrared beam expanding and focusing lens, which comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged along the propagation direction of a light path, the total length of the large-magnification infrared beam expanding and focusing lens is 110mm, and the distance between the first lens and the second lens is 0mlt; l1lt; 2 mm; the distance between the second lens and the third lens is 23 mlt; l2lt; 25 mm; the distance between the third lens and the fourth lens is 52 mmlt; l3lt; 54mm, 54mm; the full field of view of the large-magnification infrared beam expanding and focusing lens is + / -0.1 degrees, the entrance pupil diameter is 60mm, and the exit pupil diameter is 7.5 mm. The total optical length of the lens is short, the number of the lenses is small, the lens has the 1550 nm wavelength signal transmitting and receiving functions at the same time, and the size and weight of an optical system are reduced; all the lenses adopt standard spherical lenses, so that the development and processing cost is reduced, and the processing, detection and adjustment difficulty of the lenses is reduced.

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 belongs to the field of optics, and particularly discloses a light spot shrinking device for an angle resolution scatterometer. Through the first lens, the beam shaping element and the second lens which are sequentially arranged along the light path, beam focusing, beam shaping and collimation are carried out in sequence, the collimated beam with the diameter smaller than that of the beam of the light source is formed, the collimated beam is combined with the subsequent light path, and the light spot shrinking function can be achieved at the detection end of the objective lens.

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.

Embodiments of the present disclosure provide for a light emitting apparatus comprising a housing portion that is rotatably coupled to a base portion, wherein the housing portion is adjustable on two axes of rotation. In certain embodiments, the housing portion may be selectively disconnected from the base portion. The light emitting apparatus may comprise at least one LED operably engaged with at least one LED driver and a potentiometer to enable a selectively variable lumen output. In accordance with certain embodiments, the housing portion comprises at least one lens portion configured to enable one or more interchangeable / modifiable beam spread optics.

An optical lens structure with an arrangement comprising at least two directional precision lensed optics configured to illuminate a surface coupled to a luminaire and at least one of a horizontal and a vertical surface below the luminaire.

Metamaterial optics are integrated with vacuum-boundary walls of ultra-high-vacuum (UHV) cells to manipulate light in a manner analogous to various bulk optical elements including lenses, mirrors, beam splitters, polarizers, waveplate, wave guides, frequency modulators, and amplitude modulators. For example, UHV cells can have metasurface lenses formed on interior and / or exterior surfaces on one or more of their vacuum-boundary walls. Each metasurface lens can include a plurality of mesas with the same height and various cross-sectional dimensions. The uses of metasurface lenses allows through-going laser beams to be expanded, collimated or focused without using bulky refractive optics. Each metasurface lens can be formed on a cell wall using photolithographic or other techniques.

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.

Techniques and apparatus for mechanical assembly of an imaging device are described. An example image sensor assembly disposed within an imaging device includes a circuit board, an image sensor disposed on the circuit board, and an optics holder. The optics holder includes a support location, a thermally conductive material, and a plurality of extended surfaces that extend outward in a direction away from the circuit board. Each of the plurality of extended surfaces includes the thermally conductive material. The image sensor assembly also includes an optical lens disposed in the support location of the optics holder. The circuit board is disposed between the optics holder and a housing of the imaging device.

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.

A laser optics experiment kit comprises a puzzle-style baseplate; an adapter plate configured to releasably attach to the baseplate; a plurality of components configured to attach to the adapter plate and baseplate, including: a laser holder; a mirror mount assembly; a beamsplitter mount assembly; an iris mount assembly; a lens mount assembly; and a rotation plate assembly a baseplate; an adapter plate configured to directly attach to the baseplate; a plurality of adapter components configured to releasably attach in varying angular positions to the adapter plate, including: a mirror mount assembly; a beamsplitter assembly; an iris mount assembly; a lens mount assembly; and a viewing panel.

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.

A focused ion beam lens column (17) of this charged particle beam device includes an ion source (41) and an ion optics (42). The ion optics (42) includes a diaphragm member (54b) provided with a plurality of through-holes that are switched in order to cause a portion of a beam of the ions (an ion beam) generated by the ion source (41) to pass therethrough. Switching is performed to select any of the plurality of through-holes while the optical conditions of the ion optics (42) are maintained in a predetermined projection mode (second projection mode). The plurality of through-holes includes fine round holes for observation that are positioned in the center of the ion beam, first rectangular holes for processing that are positioned off the center of the ion beam, and second rectangular holes for observation and processing that are positioned off the center of the ion beam.

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.

This invention provides a system and method for enhanced depth of field (DOF) advantageously used in logistics applications, scanning for features and ID codes on objects. It effectively combines a vision system, a glass lens designed for on-axis and Scheimpflug configurations, a variable lens and a mechanical system to adapt the lens to the different configurations without detaching the optics. The optics can be steerable, which allows it to adjust between variable angles so as to optimize the viewing angle to optimize DOF for the object in a Scheimpflug configuration. One, or a plurality, of images can be acquired of the object at one, or differing angle settings, with the entire region of interest clearly imaged. In another implementation, the optical path can include a steerable mirror and a folding mirror overlying the region of interest, which allows different multiple images to be acquired at different locations on the object.

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.