24 results about "Optical beam deflection" patented technology

The application discloses a long-focus lens module and electronic equipment, the long-focus lens module comprises an imaging lens and a light beam deflection device; the light beam deflection device is arranged in the imaging light path of the imaging lens and is used for optically compensating a residual offset a still existing after compensation by the anti-shake module; the light beam deflection device comprises an angle or face shape adjustable transmission type optical element; the transmission type optical element is configured to switch from an initial state to a deflection state, and an image height change is caused by angle deflection or face shape change, so that an optical compensation amount of size-a is introduced to offset the residual offset a; in the deflection state, the relationship between the center field of view image height change DeltaIHc, the edge field of view image height change DeltaIHe and the lens magnification x satisfies the relationship formula: 0.07 <= DeltaIHe / DeltaIHc / x <= 0.4. The application introduces the image height change by angle deflection or face shape change of the transmission type optical element, so that the image height change corresponds to the change caused by the body shake, thereby weakening the influence of the body shake on the picture.

The application belongs to the technical field of laser processing equipment, and discloses a light beam deflection mechanism applied to rapid scanning of a soft ceramic laser drilling and cavity opening equipment, comprising a two-dimensional acousto-optic deflection assembly, a radio frequency driving control system, a precision adjustment fixing assembly, an optical auxiliary assembly and a cooling and heat dissipation assembly, wherein each assembly is cooperatively matched and linked with an equipment galvanometer system and an XY moving platform; after being optimized by the optical auxiliary assembly, a laser beam is incident into the two-dimensional acousto-optic deflection assembly, the radio frequency driving control system is adjusted to realize high-precision and rapid deflection of the light beam, the precision adjustment fixing assembly guarantees positioning accuracy, and the cooling and heat dissipation assembly controls thermal effects. The application realizes 0.1 mu rad deflection accuracy and 1 mu s scanning switching speed, controls the soft ceramic processing thermal effect area within 5 mu m, and can satisfy fine processing of through holes, buried holes, blind holes and <50 mu m micro holes.

The application relates to the technical field of visual identification, in particular to a three-dimensional reconstruction device and method based on binocular camera and laser radar fusion under visual guidance, aiming to solve the problem of unstable three-dimensional reconstruction precision of binocular camera and laser radar fusion. The method comprises the following steps: acquiring two-dimensional images of left and right views of a field of view region; if there is a region of interest in the two-dimensional images, the pixel position of the region of interest is extracted, and based on preset calibration parameters and the pixel position, the azimuth angle and the pitch angle of the region of interest relative to the optical axis of the device are obtained; a scanning control signal is generated according to the azimuth angle and the pitch angle, and is output to a light beam deflection scanning unit; distance information of the region of interest is acquired, and a three-dimensional reconstruction model of the region of interest is obtained according to the distance information and the angle information. The three-dimensional reconstruction device and method based on binocular camera and laser radar fusion provided by the application improve the matching stability and reconstruction precision of complex regions such as weak texture, strong reflection and occlusion.

The application relates to a light beam delay correction method and system, the method comprising: an acousto-optic modulation module receiving a laser light beam incident in a first direction and outputting diffracted light; a light beam deflection module receiving the diffracted light and deflecting the transmission direction of the diffracted light so that the diffracted light is incident on the acousto-optic modulation module in a second direction to compensate for the delay generated by the acousto-optic modulation module modulating the laser light beam; and the second direction is opposite to the first direction.

The invention provides a polarization-insensitive tunable light beam deflector based on cascade metasurfaces, and relates to the technical field of optics. The polarization-insensitive tunable light beam deflector sequentially comprises a first-layer metasurface, an air gap and a second-layer metasurface from bottom to top, the first-layer metasurface and the second-layer metasurface are both composed of elliptical nano-column arrays which are periodically arranged; the lateral displacement dx of the second layer of metasurface relative to the first layer of metasurface in the x direction and the lateral displacement dy of the second layer of metasurface in the y direction are adjusted in a mechanical mode, the total phase distribution of the cascade metasurface is changed to generate a phase gradient, and continuous deflection scanning of an emergent light beam in a two-dimensional space is achieved. The polarization-insensitive metasurface unit structure is realized by adopting the elliptical nano-columns. The nanorods are rotated by 45 degrees, so that the unit structures have the same regulation and control capability under x and y polarization, and the problem that a traditional anisotropic structure is sensitive to the polarization state of incident light is solved.

Methods and systems for high throughput and high resolution measurement of surface topography of substrates employed in semiconductor device manufacturing are described herein. A beam steering device scans an illumination beam along a beam scan path incident on a substrate surface. In addition, a specimen positioning system moves the substrate with respect to the illumination beam. In some embodiments, a hypercentric focusing lens in the illumination beam path between the beam steering device and the substrate eliminates the need for an optical element in the optical path between the surface under measurement and a position sensitive detector in the optical path of the reflected beam. A computing system generates a map of wafer tilt based on the detected position of the reflected beam at the detector. In a further aspect, a high resolution surface height map is generated based on the measured surface tilt map.

The application discloses a smoke fire detection method and a smoke fire detector based on a red light infrared mode, and the method comprises the following steps: controlling a red light module to emit first red light at a first angle, deflecting the light beam via a rotating prism to obtain first scattered light, receiving the first scattered light by a photodiode to obtain a first scattered light intensity; controlling the red light module to emit second red light at a second angle, deflecting the light beam via the rotating prism to obtain second scattered light, receiving the second scattered light by the photodiode to obtain a second scattered light intensity; controlling an infrared module to emit first infrared light at a third angle, deflecting the light beam via the rotating prism to obtain third scattered light, receiving the third scattered light by the photodiode to obtain a third scattered light intensity; acquiring CO concentration data by a CO sensor; and identifying a smoke type according to the first scattered light intensity, the second scattered light intensity, the third scattered light intensity and the CO concentration data, so that the fire type identification accuracy can be improved.

A two-layer optical beam steering device, system, method of utilization and method of fabrication are disclosed. The solid-state device enables beam steering in two dimensions with dramatically fewer control lines than prior devices. This renders the device more technically realizable, easier to control, and more affordable to manufacture. Because less data need be transferred to the device, the device is also able to operate at faster speeds.

An optical system includes a light transceiver having a steering axis where a light transceiver transmits and / or receives a first light beam along an external light path. The optical system having a first beam-deviation optical element, which controls the external light path, and includes a first prism having a first diffraction grating in the first order and the steering axis passes through the first beam-deviation optical element. The optical system having a second beam-deviation optical element, which also controls the external light path, and includes a second prism having a second prism structure and a second diffraction grating in the first order, where the steering axis passes through the second beam-deviation optical element. The optical system further includes a rotational drive assembly operable to provide rotation of the first beam-deviation optical element and the second beam-deviation optical element where the rotation adjusts the angle of the external light path.

A method of using a light beam steering transmissive and reflective element with an arbitrarily sized aperture comprising at least one layer of a insulating matrix modified for increased polarizability under electrical, magnetic or optical stimulation, between two or more substrates that can be electrically configured to provide signal modulation (optical, magnetic or electrical) that will control the wave fronts of incident light, thereby taking off-axis electromagnetic signals and aligning them to the aperture of a receiving element positioned near the device, or the reverse, sending signals originating behind the steering device to a variety of user-defined angles in two or more dimensions.

The invention relates to a method for providing control data for an ophthalmic ablation laser (12) of a treatment device (10). The method comprises determining a laser pulse positioning inaccuracy based on a predetermined statistic of eye movements and a predetermined processing latency, wherein the processing latency comprises a latency of a camera device (24), a beam deflection device (22), and the ablation laser (12); determining an ablation volume (14) for correcting a refractive error as a function of the determined laser pulse positioning inaccuracy; and providing the control data for controlling the ablation laser (12), which includes the determined ablation volume (14).

The present application relates to the technical field of laser welding, and particularly relates to a double-step laser welding device and a welding method. As far as the double-step laser welding device is concerned, a laser welder is assembled on a bearing assembly and only has a lifting motion freedom degree; a first bearing tool and a second bearing tool are arranged below the laser welder; the second bearing tool is assembled on a turnover tool; and a lifting mechanism is arranged corresponding to the first bearing tool. The laser welder adaptively covers the welding areas of the first bearing tool and the second bearing tool through a controllable deflection laser beam; the turnover tool drives the second bearing tool to perform a product turnover and a station docking action; in this way, the pain point that laser welding cannot be realized due to the product being opaque is solved, and the overall structure of the equipment and the assembly and debugging process are simplified. Furthermore, the operation form of beam deflection switching of the welding area is directly positioned and welded through optical beams, the welding positions of the double stations are unified, and the welding forming regularity is improved.

The embodiment of the present application provides a projection system, which comprises a light source, a spatial light modulator and a light beam deflector, the light beam deflector is arranged on the light path of the illumination light beam, the light beam deflector comprises variable refractive index materials arranged in an array, the light beam deflector controls the electric field applied to the variable refractive index materials arranged in an array according to the image signal of a to-be-projected image, so that the refractive index of at least part of the variable refractive index materials is changed, the illumination light beam passing through the area is deflected, and the illumination light beam incident to the spatial light modulator forms a brighter area and a darker area. By arranging the light beam deflector with the variable refractive index unit, the deflection of the illumination light beam passing through the variable refractive index unit is realized by regulating the electric field intensity of the electric field applied to the light beam deflector, the illumination light beam incident to the spatial light modulator forms a brighter area and a darker area, and then the modulation of the light steering type high dynamic projection system is realized.

Method for marking coagulation sites on a retina using a light source comprising the following steps: - Projection of a serial spot sequence from the light source, consisting of a sequential, one-dimensional sequence of individual spots, onto the retina using a beam deflection unit, wherein the individual spots denote the coagulation sites; - Waiting for confirmation of the sequence of individual spots by inputting a confirmation signal; - After confirmation of the sequence of individual spots, recalculation of an automated step sequence with another serial spot sequence and projection of the same onto the retina according to the first step; - Subsequent repetitions of the second and third steps; - wherein an automated step sequence specifies an equidistant translation.

The application discloses a gaze fast tracking technology based on field of view modulation and belongs to the technical field of photoelectric detection and target tracking. The application comprises the following steps: separating composite light, collecting images of corresponding light through a sensor device, and performing quality evaluation on the images to obtain image quality indexes; a central processing module dynamically adjusts the weight of each waveband in a tracking loop based on the image quality indexes; a weighted sum of target miss distances of each waveband detected by the sensor device is obtained according to the weight; a deflection instruction is generated according to the comprehensive miss distance, and the deflection instruction is sent to a control driving module; and the angle is adjusted through the control driving module to drive a light beam deflection execution device. The application physically eliminates parallax through a common-aperture optical path, improves tracking accuracy, realizes environmental self-adaptation through dynamic weight control, ensures stable tracking in the whole period, greatly improves the system response speed through a low-inertia light beam deflection device, and realizes fast gaze locking on a high-speed maneuvering target.

The present invention provides an optical element containing a chiral LC polymer film. [Solution] The present invention relates to optical elements comprising chiral liquid crystal (LC) polymer films (as a subcategory of liquid crystal materials), methods for manufacturing the same, and the use of the same as a diffractive optical element in optical components or electro-optical components or devices, particularly for digital optical systems or augmented reality or virtual reality (AR / VR) applications, such as polarizers, optical compensators, reflective films, diffraction gratings or surface gratings, Bragg polarizing gratings (Bragg PG), polarizing volume gratings (PVG), polarizing volume holograms (PVH), Pancharatnam Berry (PB) gratings, non-mechanical beam steering elements, optical waveguides, optical couplers, optical combiners, polarizing beam splitters, partial mirrors or lenses.

An actuator may include a stator supporting a magnet; a stationary pole; and a bobbin supporting a winding of a coil, the bobbin being coaxial with the stator and stationary pole, and positioned inside the magnet and outside the stationary pole. A gap may be provided between the bobbin and the stationary pole. A beam steering mechanism may include a mirror; a frame; a pivot anchor fixed to the frame and connected to the mirror; and an actuator. An output end of the actuator may be connected to the rear surface. A beam steering mechanism may alternatively include a flexure; a mirror attached to the flexure; a frame; supports fixed to the frame and the flexure; a pivot anchor fixed to the frame and connected to the mirror or the flexure; and an actuator. An output end of the actuator may be connected to the flexure.

This application relates to a laser splicing processing method, equipment, system, computer equipment, computer-readable storage medium, computer program product, and workpiece. The method includes: controlling a laser point to move to a target processing point on a workpiece comprising multiple material layers; controlling a laser to continuously emit multiple laser pulses towards the target processing point, and inputting an RF drive signal corresponding to each laser pulse to a beam deflection device according to the amplitude of the RF drive signal corresponding to each laser pulse; the continuously emitted laser pulses are used to continuously process the multiple material layers at the target processing point; wherein, the amplitude of the RF drive signal is used to regulate the laser energy of each laser pulse, and the laser energy of each laser pulse is determined based on the material type of the material layer corresponding to each laser pulse. This method can improve processing accuracy.

The present application relates to light beam tracking device and method, specifically relates to phase control component control method based on partition time sequence rotation control, liquid crystal optical phased array light beam tracking system and method. In order to solve the prior art exists liquid crystal optical phased array low response frequency causes residual tracking error, reduces the light intensity stability, and the dynamic distortion caused by the process of liquid crystal molecule reorientation leads to the spot center drift, power drop or even instantaneous lockout, the deficiency, the present application is based on the phase control component control method of partition time sequence rotation control, the phase control component is set to N region, N >= 2;The deflection angle of light beam or the phase to be compensated is calculated, which is converted into the phase distribution of each region of the phase control component, the number of rotation is calculated, the region to be activated is calculated, the phase is updated, and the rotation control is carried out on each region in turn until the spot centroid position or wavefront phase meets the design requirements.

This invention provides a light-transmitting housing for a lidar and the lidar itself. The light-transmitting housing has a rotationally symmetric structure about the lidar's axis of rotation. The inner surface of the housing is parabolic, and its cross-section along the axis of rotation forms a parabola. The outer surface of the housing, on the cross-section along the axis of rotation, is an even-order aspherical shape corresponding to the parabola. The coordinate system used in the equation of the even-order aspherical shape has its z-axis parallel to the axis of rotation, and the planes containing the x-axis and y-axis of the coordinate system are parallel to the lidar scanning plane. The even-order aspherical shape ensures that a light beam emitted from any height parallel to the x-axis within the xz-cross-section along the axis of rotation is emitted parallel to the x-axis. The defocusing position of the lidar's light source ensures that the absolute value of the difference between the first divergence angle and the second divergence angle is less than a preset threshold. This invention solves the problem of beam deflection and divergence affecting beam transmission characteristics, thus improving the overall performance of the lidar.

This invention relates to a method for correcting FTheta field lens distortion in multi-spot 3D printing, belonging to the field of 3D printing. It includes the following steps: establishing a relationship function between the beam deflection angle during printing and the distance between the average coordinates of all spots on the printing surface and the perpendicular position of the laser beam, based on the optical path system; determining the beam deflection angle at a distance *r* between the average coordinates of the spots and the perpendicular position of the laser beam, based on the relationship function, and calculating the maximum angle between multiple lasers under distortion conditions; adjusting the beam deflection angle by rotating the galvanometer during printing, while simultaneously adjusting the optical path system to ensure that the maximum angle between multiple lasers always matches the calculated result, thus achieving FTheta field lens distortion correction. This method can print multiple identical patterns even if the FTheta field lens has distortion.

To provide an optical scanning device equipped with a reflective element having sufficient corrosion resistance. [Solution] The optical scanning device according to the present invention comprises a deflector that deflects a light beam from a light source to scan a surface to be scanned in the main scanning direction, an optical system that guides the light beam deflected by the deflector to the surface to be scanned, a reflective element having a reflective surface that reflects the light beam deflected by the deflector, and first and second surfaces that are non-parallel to the reflective surface, and a holding member that holds the reflective element, wherein the corrosion resistance of the second ridge between the reflective surface and the second surface is lower than the corrosion resistance of the first ridge between the reflective surface and the first surface, and the first region including at least a part of the second ridge is bonded to the holding member with a first adhesive.

The application provides a 2f wavelength selection switch, belonging to the technical field of optical switches, comprising a fiber array mirror group, a polarization mirror group, a shaping lens group, a grating, a cylindrical mirror and a beam deflection control device, the fiber array mirror group, the shaping lens group and the beam deflection control device constitute a 2f structure, and the grating, the cylindrical mirror and the beam deflection control device constitute a 2f structure; the fiber array mirror group emits a single beam of light which is shaped by a wave front and expanded, the single beam of light is modulated into double beams of light which are parallel to each other with an included angle of 0° by the polarization mirror group, the double beams of light are dispersed after entering the grating, and different wavelength beams are emitted to the cylindrical mirror, are collimated by the cylindrical mirror and are converged on the beam deflection control device, and the shaping lens group realizes shaping of the light beams, the polarization processing of the polarization mirror group is changed to parallel light emission in the switch, an input light path is separated, the degree of freedom is increased, the design process is simplified, and production and assembly are facilitated.

The area from which the observer can observe the light beam from the display element is wider than the area from which the observer can observe it. [Solution] The optical system has a light guide member 103 which has an incident section 111 into which a light beam from the display element 101 is incident, and an outgoing section 112 which causes the light beam that has been incident from the incident section and propagated through the interior to be emitted toward the observation area. The light guide member has a transmissive reflective surface 114 which transmits or reflects the light beam incident from the incident section, and a deflection section 113 which deflects the light beam transmitted or reflected by the transmissive reflective surface toward the transmissive reflective surface, and the transmissive reflective surface directs the light beam from the deflection section toward the outgoing section.