93 results about "Focus (optics)" patented technology

The invention provides a printing optical element, a printing method and a far-image optical instrument, and relates to the technical field of far-image optics, the printing optical element comprises a substrate and a patterning layer, the substrate is transparent, and a printing area is arranged on the first side of the substrate; the patterned layer is located in the printing area and comprises a plurality of function parts protruding from the surface of the substrate, and the function parts are formed through UV printing and distributed in a geometric array mode. Wherein the function part is semitransparent and is in a continuous columnar form; the functional part is reflected by the free-form surface mirror to be imaged to an imaging panel of the far-image optical instrument and presents a first imaging surface; and the first imaging surface and a second imaging surface of the far-image optical instrument for amplifying and presenting the object are distributed at an interval. When a user watches magnified information on the second imaging surface, the focal length can be actively adjusted to switch focusing between the first imaging surface and the second imaging surface, so that eyestrain is relieved, and the effect of adjusting crystalline lenses of eyes to prevent and control myopia is achieved.

The invention relates to the technical field of micro-nano optics, and particularly provides a detection metasurface, a spectral polarization detection method and a construction method of the metasurface. The detection metasurface comprises a substrate and dielectric cylinders arranged on the surface of the substrate. Wherein the phase parameter of the dielectric cylinder meets a preset detection condition; the preset detection condition comprises that the positions of the light with different wavelengths or / and different polarization states on the focusing focus of the focal plane are different. Because the phase parameter of the dielectric cylinder meets the preset detection condition, incident light with different wavelengths or / and different polarization states can be focused at different positions of a focal plane based on the detection metasurface, and then spectral information and polarization information contained in the incident light are determined based on the position and light intensity of a focusing point. Therefore, spectrum information and polarization information can be obtained in real time through single detection based on the detection metasurface, real-time polarization spectrum detection is achieved, the information obtaining dimension is improved, and meanwhile the detection efficiency and the dynamic object detection capacity are improved.

The invention discloses a wavefront detection-free adaptive optical correction method and system, and the method comprises the steps: obtaining a real in-focus image and a real out-of-focus image of a to-be-corrected light beam, and outputting an updated deformable mirror control voltage through a physical information neural network; generating a predicted wavefront phase according to the deformable mirror control voltage signal and a deformable mirror voltage-phase mapping model; generating a predicted in-focus image and a predicted out-of-focus image through a derivable Fourier optical propagation model; constructing a label-free composite loss function according to the real in-focus image, the real out-of-focus image, the predicted in-focus image and the predicted out-of-focus image; performing unsupervised training updating on the physical information neural network according to the composite loss function, and performing repeated iteration to obtain an optimized deformable mirror control voltage; and driving the deformable mirror to carry out self-adaptive optical correction in real time according to the optimized deformable mirror control voltage to obtain a correction result. According to the invention, the correction efficiency and the system stability are obviously improved.

X-ray optics comprising: (i) achromatic collimation optics adapted to collimate an input X-ray beam to provide a collimated X-ray beam; (ii) an adjustable diffraction unit adapted to: (a) receive the collimated X-ray beam while being configured according to a current configuration associated with a current wavelength selected from among the different wavelengths, the current configuration being selected from among the different configurations associated with the different wavelengths; and (b) filtering the collimated X-ray beam to provide a filtered collimated X-ray beam of a current wavelength; and (iii) achromatic focusing optics configured to focus the filtered collimated X-ray beam to provide a focused filtered X-ray beam.

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 invention discloses an image processing method and device, and belongs to the field of computing camera shooting. The method comprises the following steps: acquiring a to-be-processed image and a blurring parameter of the to-be-processed image; inputting the to-be-processed image and the blurring parameters into a blurring rendering model for blurring rendering processing to obtain a bokeh image of the to-be-processed image output by the blurring rendering model; wherein the blurring rendering model is a model obtained by performing fine tuning training on a pre-training diffusion model based on multiple groups of training data, each group of training data comprises input data and label data of the input data, and the input data comprises a full-focus image sample and a blurring parameter of the full-focus image sample; the label data comprises a bokeh image of a full-focus image sample, and the pre-training diffusion model adopts an optical self-attention mechanism based on computational optics.

A microscopy system (1) is provided for imaging a sample. The microscopy system comprises a light source system (10) configured for providing a first train of optical pulses (T1) at first optical center wavelengths (l1) and a second train of optical pulses (T2) at second optical center wavelengths (l2), both at a first repetition frequency (f1). A repetition rate multiplier (30) is configured to receive the first train of optical pulses (T1) and to output a third train of optical pulses (T3) at a second repetition frequency (f2) different from the first repetition frequency (f1), focusing optics (40) configured to direct the second train of optical pulses (T2) and the third train of optical pulses (T3) to a sample in a focal volume (5). The microscopy system comprises an optical detector (60) configured to detect a transmitted or reflected third train of optical pulses (T31) after interaction in the sample in the focal volume, and a processor (80) configured to process signal components at the first repetition frequency (f1) from the detected transmitted or reflected third train of optical pulses (T31) and to output a signal or a pixel representative of the interaction in the sample.

An intraoral scanner comprises a housing, a light source for generating light, an optics system for focusing the light, a detector for detecting returning light reflected off an intraoral object, and a focus shifting mechanism configured to shift a focal plane of the optics system. The optics system is configured such that, after having passed through the optics system, an outermost chief ray of the light with respect to an optical axis of the optics system is divergent to the optical axis and an outermost marginal ray of the light with respect to the optical axis is parallel or divergent to the optical axis.

A method for treating near-retina floaters includes dilating a pupil of an eye of a patient to at least 6.6 millimeters (mm). While the pupil is dilated to at least 6.6 mm, the method further includes emitting, by an optical delivery system, a plurality of pulses from a treatment laser into the eye of the patient, each pulse of the plurality of pulses having a diameter upon passing through the pupil that substantially fills the pupil and having a focus within 3 mm of a retina of the eye of the patient. Pulses may pass through adaptive optics that may be adjusted based on light emitted from the eye, such as two-photon fluorescence or second harmonic radiation, in order to reduce spot size at the focus.

The invention discloses a fixed-focus optical system and a vehicle-mounted lens, and relates to the technical field of optics, and the fixed-focus optical system is provided with an object side and an image side which are oppositely arranged in the direction of an optical axis. The fixed-focus optical system is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and an image plane which are sequentially arranged from the object side to the image side. The fixed-focus optical system can realize high resolution, small distortion, bright picture and better imaging effect.

A method and apparatus to maintain image focus on parts such as wafers, circuit boards, or high-density substrates as the part is being inspected. Focus performance is independent of feature and trace orientation and density. This apparatus can be easily integrated into an inspection system and can maintain focus on parts with high aspect ratio structures and or low or non-reflective insulators. It enables the inspection of high-density fine line products requiring the use of high resolution, high numerical aperture (NA) imaging optics with small depths of focus (DOF) that must be kept in focus during the inspection.

A laboratory-based 3D scanning X-ray scanning Laue microdiffraction system and method for crystal material characterization, comprising: focusing optics, a sample located at a distance from the focusing optics, a laboratory X-ray source, a stage to translate and rotate the sample, a detector arranged to detect a Laue diffraction pattern of diffracted X-rays. The method comprises scanning each layer of the sample by translating the sample at different rotations relative to the focused beam to illuminate each voxel in the layer in more than one rotation, and indexing each voxel in the layer using recorded Laue diffraction patterns in different rotations. By repeating the translation and rotation for different layers of the sample, a 3D image of the sample grain structure is reconstructed.

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.

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.

Aspects of the disclosure relate to the use of an optical detection scheme enabling multiple imaging sub-systems concurrently optimized for retrieving multiple characterization modalities. The feature described is an offset illumination and detection arrangement for a multimodal imaging probe. The imaging probe comprises multiple waveguides disposed within a torque-transfer coil, distally terminating at longitudinally separated positions. A first waveguide may have focusing optics for focused illumination and / or detection. Any number of other waveguides may be deployed for illumination and / or detection having no focusing optics. The disclosure enables high-fidelity multimodal imaging systems.

The invention discloses a four-focus long-focal-depth broadband achromatic superlens design based on an improved weighted GS algorithm, and belongs to the field of micro-nano optics. The super lens comprises a silicon dioxide substrate and a titanium dioxide cylindrical nano column array. In the initial iteration stage of the GS algorithm, focusing and axicon superposition phases are adopted to construct a complex amplitude field, and a dynamic amplitude weighted feedback mechanism is introduced. According to the design, four off-axis focuses with highly uniform energy are realized on a target focal plane, and focal length drift caused by broadband dispersion is covered by using an expanded super-long focal depth. Simulation shows that within the range of 640-740 nm, the average focal depth of the device reaches 6.33 microns, the focus intensity deviation is smaller than 5%, the average focusing efficiency is 62.47%, and broadband achromatic focusing is effectively achieved. The method has a wide application prospect in the fields of parallel laser processing, high-throughput imaging and the like.

The invention belongs to the technical field of optics, and particularly relates to a rapid dynamic separation method and device for radial and angular polarization components of a light beam, and efficient and dynamic polarization component separation is realized by using the birefringence characteristic of an SBN uniaxial crystal and applying an adjustable electric field to the crystal in combination with an external electric field module. According to the method, radial and angular polarization components can be gradually separated and focused on different focuses in the propagation process, the positions of the focuses are flexibly controlled by adjusting the direction and size of the external electric field, and higher flexibility and accuracy are provided. Therefore, the flexibility and efficiency in the fields of optical control, high-resolution imaging, optical communication, quantum information processing and the like are remarkably improved, and more efficient and accurate light beam processing technical support is provided for the applications.

The present invention provides a light-emitting device (1000), comprising: (i) n laser light sources (10), (ii) focusing optics (20), and (iii) a luminescent body (200), wherein: (A) the n laser light sources (10) are configured to generate laser light source light (11); wherein the focusing optics (20) are configured to focus the laser light source light (11) into a focused beam (21) of the laser light source light (11); wherein n≥2; (B) the luminescent body (200) comprises a luminescent material (210), wherein the luminescent body (200) is configured to be in an optical receiving relationship with the n laser light sources (10), wherein the luminescent material (210) is configured to convert at least a part of the laser light source light (11) into luminescent material light (211); (C) the n laser light sources (10) and the focusing optics (20) are configured to provide a spot (300) of the laser light source light (11) on the luminescent body (200) in an operating mode; wherein k groups of spots (300) each have a separately selected number m of spots (300), wherein two or more spots (300) within each group have partial overlap, wherein 2≤m≤n and 1≤k<n; and (D) wherein a first spot region (310) is defined by 10%-100% of the maximum intensity of the spot (300), wherein for at least one spot (300) within at least one of the k groups, it is applicable to overlap with at least another first spot region within the range of 5%-80% of its first spot region (310).

The invention relates to the technical field of optics, and discloses a wide-viewing-angle wavefront sensing device, which constructs an image space telecentric light path through the combination of a diaphragm and a lens group and the arrangement of the diaphragm at the object space focus of the lens group, so that the wavefront of large-angle incidence becomes the wavefront of the incidence of main light rays vertical to a micro lens array after passing through the image space telecentric light path, and the wavefront of the incidence of the main light rays vertical to the micro lens array is formed. The photoelectric sensor is located on the focal plane of the micro-lens array, so that after incident wavefronts at different angles are incident through the diaphragm and are refracted by the lens group, main light rays of the refracted incident wavefronts are vertically and orthogonally incident into the plane of the micro-lens array, are segmented by the micro-lens array and then are transmitted forwards; focusing light spots corresponding to incident wavefronts are formed on the photoelectric sensor, so that the angle detection range of the wavefront sensor is expanded, the wavefront reconstruction precision is improved, and wavefront information of incident light beams in a large field of view is measured at the same time.

The invention relates to a method for temperature stabilization of a current optical system state of a visualization system and a visualization system. In order to operate a visualization system (1) in an improved manner, the visualization system comprises imaging optics (2) with adjustable zoom optics (3) and also adjustable focusing optics (4), according to the invention, at least one detection temperature (12) in the imaging optics (2) is detected directly and / or indirectly (e.g. By estimation) by means of at least one temperature detector (27), and once a currently detected temperature change (11) with respect to the detection temperature (12) exceeds a temperature threshold value (18), the detection temperature (12) is detected. If so, the focusing optics (4) and / or the zoom optics (3) are actively adjusted by means of a stabilization system (9) comprising one or more stabilization adjustment loops (10).

A method and system for high-speed 2θ multi-point scatterometry is disclosed. The method includes directing a laser beam from a laser light source to a collimation optical system that collimates the laser beam to a collimated laser beam; adjusting a polarization of the collimated laser beam using a polarization control optics; directing the collimated laser beam that is polarized by a first optical system to illuminate a focal area on a sample surface; receiving reflected light from the focus of the laser light source at the sample surface by a second optical system; detecting the reflected light by a detector system to produce detection signals; and processing the detection signals to measure parameters of the sample surface.

The utility model relates to the technical field of zoom optics, in particular to a zoom optical device based on a liquid lens, which comprises a mounting sleeve, a transparent tube is inserted into one side of the inner wall of the mounting sleeve, and a sliding block is fixedly connected to one side of the bottom of the transparent tube; through the arrangement of the mounting sleeve, the transparent tube, the sliding block, the positioning block, the threaded rod and the limiting block, during use, the mounting groove is formed in the inner bottom wall of the mounting sleeve so that the sliding block at the bottom of the transparent tube can be conveniently inserted in a sliding mode, the connecting rod drives the driving gear at the bottom end to rotate, and the driving gear drives the transmission gears meshed with the two sides of the surface to rotate; the two threaded rods drive limiting blocks with the surfaces in threaded connection to move correspondingly, so that the limiting blocks conveniently move into positioning grooves in the two sides of the inner wall of the mounting groove, the positioning blocks are conveniently and stably mounted in the mounting groove, and sliding blocks at the bottom of a transparent pipe are stably fixed in the mounting groove; therefore, the effect of conveniently disassembling and assembling the liquid lens is achieved.

Method for controlling the distance (14) between the workpiece (9) and the processing optics (8) during cutting, drilling, and ablation of various materials with minimal side effects on non-irradiated areas, wherein the workpiece (9) is irradiated by a pulsed laser (7) with an intensity that generates plasma emission, wherein the strength of the plasma emission is detected, stored, and evaluated in such a way that the distance (14) of the processing optics to the workpiece surface is varied (15) until a local minimum (3) is reached near the maximum intensity of the plasma emission (target position) and sharp cuts and ablation channels are produced, characterized in that the detection of the strength of the plasma emission is carried out by means of a detection system (10) consisting of filters and photodetectors, wherein a spectrometer can also be used instead of a filter.

Improved fluoresced imaging (FI) endoscope devices and systems are provided to enhance use of endoscopes with FI and visible light capabilities. An endoscope device is provided for endoscopy imaging in a white light and a fluoresced light mode. A chromatic adjustment assembly, typically implemented with prisms, compensates for a chromatic focal difference between the white light image and the fluoresced light image caused by the dispersive properties of the optical materials or optical design employed in the construction of the optical channel. The assembly is placed optically between the most proximal rod lens of the endoscope and the focusing optics, typically at an internal telecentric image space, to improve the chromatic correction. The prism assembly directs incoming light with different spectral content along separate paths which compensate for chromatic aberration.

Methods and system for chromatic confocal microscopy are described. One example chromatic confocal microscope system includes a hyperchromatic objective lens configured to focus the light of different wavelengths onto different corresponding focal planes that are separated from one another within a sample object, focusing optics positioned to receive multi-spectral light reflected from the sample object after passing through the hyperchromatic objective lens, a detection slit to receive light from the focusing optics and to block at least a portion of light that is incident thereon, and a grating positioned to receive light after passing through the detection slit and to produce spatially separated light of different wavelengths to enable the detection of spatially separated light by an imaging sensor. The described chromatic confocal microscopes may be used to develop low-cost chromatic confocal endoscopes for disease diagnosis of human internal organs in vivo.

The invention relates to a method for laser processing a workpiece (104) having a material (102) which is transparent for the laser processing, in which method an input laser beam (108) is divided into a plurality of sub-beams (116) by means of a beam splitting element (106), wherein the division of the input laser beam (108) by means of the beam splitting element (106) is effected by imposing a phase on a beam cross section (112) of the input laser beam (108), the sub-beams (116) which are coupled out of the beam splitting element (106) are focused by means of focusing optics (118), a plurality of focal elements (120) is configured by focusing the sub-beams (116), and in the method at least one subset of the configured focal elements (120) is loaded onto the material (102) of the workpiece (104) for the laser processing. The phase imposition is effected by means of the beam splitting element (106) in such a way that at least two of the configured focal elements (120) have different intensities (I).

The invention discloses a three-dimensional optical focus regulation and control device, and relates to the technical field of micro-nano optics. The three cascaded metasurfaces are arranged to be capable of relatively rotating and moving, and the three metasurfaces have the synergistically designed phase distribution functions, so that decoupling control of axial focus change and transverse focus offset is realized. Specifically, a complementary rotation pair is formed by a second metasurface and a third metasurface, and the relative rotation of the second metasurface and the third metasurface is used for adjusting an axial focus and inhibiting aberration (such as coma and astigmatism) introduced by a lateral offset term at the same time; the relative rotation of the first metasurface and the second metasurface mainly regulates and controls an angular phase item to realize the lateral offset of a focus; due to the fact that the phase function is designed to be separable in angular modulation and radial modulation, controlled focuses can transversely move and axially move through different rotation pairs, and independence of the two control modes, namely decoupling regulation and control, is achieved.

The invention relates to the field of optics, in particular to a prime lens and an imaging device, and the prime lens is sequentially composed of a first lens group with negative focal power and a second lens group with positive focal power from an object plane side to an image plane side; each of the first lens group and the second lens group at least comprises two groups of bonding lenses; the prime lens satisfies the following conditional expressions: f is more than 10mm and less than 20mm; fno is less than 1.2; wherein f is the focal length of the prime lens, and fno is the aperture number of the prime lens. Through the limitation of the parameters and the structure, on the basis of realizing the large aperture of the medium-magnification prime lens, the spherical aberration and the chromatic aberration of the prime lens can be reduced through the arrangement of the bonding lens, and the resolving power of the prime lens is increased.

An optical system of a head-up hyperopia read-write table is composed of two reflecting mirrors, the first reflecting mirror is a plane reflecting mirror or a concave reflecting mirror, and the second reflecting mirror is a concave reflecting mirror or a plane reflecting mirror. The first reflecting mirror is positioned above an observed object and forms an angle of 10-30 degrees with the horizontal plane, and the second reflecting mirror is positioned on one side below the first reflecting mirror and forms an angle of 55-75 degrees with the horizontal plane. And an observed object on the desktop forms a vertical amplified long-sight-distance virtual image which is the same as the observed object on the left and right in the second reflecting mirror, so that the head-up long-sight-distance reading and writing effect is realized. The optical system solves the problems of ghosting and high cost of the traditional out-of-focus read-write table semi-transparent and semi-reflecting mirror optics.

Various implementations disclosed herein capture sensor data regarding portions of an eye (e.g., the cornea, iris, or retina, etc.) with a near-eye device (e.g., an HMD) using an array of photodiodes embedded within the device's display. The device includes optics configured to focus light from the display on the retina. The device includes a light source configured to illuminate a portion of the eye to be imaged with light having a wavelength (e.g., IR light) that does not interfere with the visible light from the display (e.g., non-IR light). Some implementations, provide outer-eye (e.g., corneal) imaging by accounting for the device's optics having a retinal focus. This may involve, as examples, using wavelength-specific components (e.g., a wavelength specific aperture stop / pinhole, an array of aperture stops / pinholes; a second lens, a meta-surface (for back-and-forth reflections / refractions), or other features.