55 results about "Optical axis alignment" patented technology

The invention provides a zero offset detection device and method for an optical aiming device. The device comprises a laser cross emitter, an attenuation piece, a test target plate, a camera and a PC terminal. The attenuation sheet is arranged at the light path output end of the laser cross-shaped emitter and is located between the laser cross-shaped emitter and the test target plate; the test target plate is arranged in the laser emitting direction of the attenuation sheet, and a preset distance is formed between the test target plate and the laser cross emitter; the optical axis of the camera is aligned with the test target plate, and the camera is used for collecting a laser image on the test target plate and sending the laser image to the PC terminal; and the PC terminal controls the camera to move to coincide with the cross center of the target plate in a cross division manner, records the movement amount and calculates the zero offset. According to the invention, the problems of complex zero offset detection process, low safety and insufficient precision can be solved.

The invention discloses an optical axis calibration method and device applied to a projection illumination light path, and belongs to the technical field of optics, and the device comprises a laser which is used for transmitting an initial collimated light beam; the forward beam expander is arranged on a light emitting path of the laser and is used for expanding the initial collimated light beam to form large-aperture collimated light; the beam splitter is arranged on an emergent light path of the forward beam expander and is used for splitting the large-aperture collimated light into a reflected light beam and a transmitted light beam; the reflecting mirror is arranged in a transmission light path of the beam splitter and is used for reflecting the transmission light beam back to the beam splitter; and the reverse beam expander is arranged in a reflection light path of the beam splitter and is used for converging the reflection light beams into a point light source. According to the invention, the abstract'optical axis alignment 'problem is converted into visual'light spot superposition' judgment, the principle breakthrough from traditional indirect energy measurement to direct spatial position comparison is realized, and the calibration precision is improved.

The invention discloses a convex spherical lens optical axis and interferometer system optical axis alignment method, a concave spherical lens is arranged behind a convex spherical lens, the convex spherical lens and the concave spherical lens form an interference cavity at a confocal position, and the interference cavity is adjusted to zero fringes; the concave spherical mirror is moved in the direction of increasing the optical path of the optical axis, and cat eye-like stripes of the convex spherical mirror lens can be observed after the concave spherical mirror is moved to a designated position; the cat eye-like stripes of the convex spherical lens are adjusted to be concentric circles, and when the tilt term of the wave aberration of the measured phase result is approximately zero, alignment is completed. The curvature radius of the standard surface of the concave spherical mirror is larger than that of the reference surface of the convex spherical mirror. The device can align the convex spherical lens with the optical axis of the interferometer system, is not limited by the F number of the spherical lens, and has the advantages of simple structure and high measurement precision.

The application provides a kind of multi-core optical fiber based rotating object rotational speed measurement method and system, the method is by generating the detection light field with specific spatial structure, transmission through multi-core optical fiber and phase modulation obtains the preset structure of the exit light field;The light field is used to irradiate the rotating object, receive the reflected signal and return through the same path, detect the signal intensity change to obtain the time domain signal;Frequency shift information is obtained by frequency domain analysis and the angular velocity is calculated.The method realizes the flexible regulation and control of the light field multi-degree of freedom by the combination of spatial light modulator and multi-core optical fiber, breaks through the limitation of insufficient existing regulation and control degree of freedom;The requirement for optical axis alignment accuracy is reduced by using structured light field;The system miniaturization is realized by using flexible multi-core optical fiber, and the problem of narrow space application is solved;The parallel transmission and anti-interference characteristics of multi-core optical fiber are fully utilized, and the measurement stability and precision in complex environment are significantly improved by digital phase conjugation and transceiver integrated design.

The invention discloses a micro-optics-based optical axis alignment optimization method in optical assembly. The method comprises the following steps: constructing a micro-optics system containing lens center deviation; carrying out micro-optical tracing on the optical system under the conditions of a set view field range and a set working wave band, and taking a translation pose parameter and an inclination pose parameter of each lens element as micro-variables to participate in ray tracing calculation in the tracing process; calculating an evaluation loss function according to the micro-ray tracing result, back-propagating the loss function by using an automatic differential technology, and calculating gradients of micro-variables such as translation pose parameters and tilt pose parameters of each lens element; and according to the gradient information, processing the microvariants by adopting an optimization algorithm based on gradient descent to obtain an optical system structure after optical axis alignment optimization. According to the invention, realignment of the lower optical axis of the decentration-containing system can be effectively realized, and specific pose adjustment parameters can be generated.

An optical space communication device includes a transmitter for transmitting a first signal for optical axis alignment with another optical space communication device including a reflector, the first signal being modulated using a first spreading code, and a receiver for detecting, from a received optical signal, a reflected signal of the first signal reflected by a reflector of the other optical space communication device using the first spreading code, and detecting, from a received optical signal, a second signal for optical space communication transmitted from the other optical space communication device using a second spreading code different from the first spreading code.

An aspect of the present disclosure provides a hybrid recording system, wherein the hybrid recording system, with respect to incident light from a target object, comprises an objective lens, a circular polarizer, a geometric phase lens, a variable waveplate, a linear polarizer, and an image sensor that are sequentially arranged and aligned with one optical axis, and wherein the variable waveplate operates in an ON mode to convert a wavefront of two orthogonal circular polarization components that are output from the geometric phase lens into two orthogonal linear polarization components, or operates in an OFF mode.

The application discloses a normal vector-based follow-sighting attitude maneuver path planning method, and belongs to the technical field of spacecraft attitude control, and comprises the following steps: at any time during the follow-sighting maneuver, a camera optical axis is aligned with a target, and a satellite body axis perpendicular to the camera optical axis is set to point to a set normal vector direction, the set normal vector direction is set according to maneuver capability and pointing requirement, and the setting basis is that the body axis is in the set normal vector direction; the set normal vector direction is determined according to the follow-sighting task, and includes four cases, namely, keeping data transmission, keeping energy, keeping maneuver and keeping imaging. The normal vector of the plane formed by the target pointing and the ground pointing is applied, and the target attitude setting during the antenna data transmission to the ground while the follow-sighting is realized.

An electronic device includes at least one lens, an image sensor aligned along an optical axis from the at least one lens, and a reflective and refractive member disposed between the at least one lens and the image sensor on the optical axis. The reflective and refractive member includes an incident surface on which light passing through the at least one lens is incident, a first reflective surface inclined with respect to the incident surface, and a second reflective surface inclined with respect to the incident surface and spaced apart from the first reflective surface. First and second cutting planes are inclined with respect to the incident surface and face first and second directions, respectively.

At least one camera module disposed in an electronic device is provided. The at least one camera module includes a lens assembly aligned along an optical axis, an image sensor for changing an image to an electrical signal, an optical image stabilization (OIS) driving unit for providing force for the lens assembly or the image sensor to move in a direction perpendicular to the optical axis or to rotate about the optical axis, and a housing for accommodating the lens assembly, the image sensor and the OIS driving unit, wherein the OIS driving unit includes an OIS carrier for moving in the direction perpendicular to the optical axis or rotating about the optical axis, the OIS carrier transports the lens assembly or the image sensor based on the movement of the OIS driving unit, a plurality of first axis drive coils disposed on a first side of the housing, a first magnet having at least two polarities, and disposed on the OIS carrier to face the plurality of the first axis drive coils, at least two first position sensors disposed at coil centers of at least two drive coils respectively among the plurality of the first axis drive coils, and configured to acquire first information for measuring a position of the first magnet for a first axis direction of the OIS driving unit, and at least one second position sensor configured to acquire second information for measuring a position of the first magnet for a second axis direction of the OIS driving unit, and wherein the at least one second position sensor be disposed on the first side of the housing to face one or more neutral zones of the first magnet.

The present disclosure is directed to a lens system having a LED, a first lens and a second lens that are aligned along a central optical axis, a housing, and an aperture positioned within the housing, which enables the lens system to provide an illuminated plane having a selected illumination profile in a region of interest, namely an illumination profile that is a uniform or flat field. The present first and second lenses are selectively paired and positioned in the housing to project a light output that is parallel or non-divergent. In another aspect, the present disclosure is directed to a method that generates light from a light source that passes through a first lens and then a second lens, and determines a location of an illuminated plane that is positioned a specified distance from a proximal surface of the second lens to produce a selected illumination profile.

The application discloses a kind of high-precision laser measurement optical axis alignment device and method with universality, solve the problem that the alignment precision of existing laser optical axis alignment technology is low, and the difficulty of spot coincidence is big, specifically including light splitting system, stray light measurement system, laser interference displacement measurement system and optical axis alignment measurement system;Light splitting system includes first light splitting prism, second light splitting prism and third light splitting prism;Laser interference displacement measurement system includes dual-frequency laser and laser interference displacement measurement unit;Optical axis alignment measurement system includes position detector, fiber coupler, receiver, acquisition card and host computer;The application utilizes the independence of interference fringe formed by laser interference displacement measurement unit and bidirectional measurement, forms universal high-precision laser measurement optical axis alignment device.The device realizes optical axis alignment by adjusting interference fringe, reference spot and measurement spot, and can obtain high-precision optical axis alignment degree.

Some aspects of the technology described herein are directed to a low-profile imaging system for capturing a portion of light from a view of a weapon scope. The low-profile imaging system comprising: a receiving aperture being aligned with a viewing optical axis; an output aperture being aligned with the viewing optical axis; and an optical prism having a first and a second angled surface configured in a three-bounce configuration, the first angled surface positioned along the viewing optical axis and the second angled surface positioned along an imaging optical axis, wherein the imaging optical axis is substantially parallel to the viewing optical axis.

A method for aligning a near-eye display (110) with an imaging module (120) includes placing the near-eye display (110) and the imaging module (120) at respective initial positions. The method also includes aligning a center of a virtual image rendered by the near-eye display (110) with an optical axis of the imaging module (120). The method further includes positioning the imaging module (120) at an eye point of an eye box of the near-eye display (110).

An optical lens assembly for a near-eye display device includes a light box and a diffractive optical element (DOE). The light box has a first layer facing a display screen of the near-eye display device and a second layer facing the DOE. The light box is configured to receive first light from a display screen of the near-eye display device and to transmit at least a portion of the first light to the DOE through a folded light path, where the first layer and the second layer are flat. The DOE is aligned with an optical axis of the eye and is configured to receive the second light from the light box and converge the second light to the eye.

The invention provides an optical axis marking method and device for a holographic photoetching illumination system, and the method comprises the following steps: carrying out the wavefront measurement of the illumination system through wavefront detection equipment, and obtaining an illumination system transmission wavefront aberration which corresponds to a standard incident optical axis and meets a preset threshold value; an optical axis marking element is arranged at a light inlet of the illumination system and is provided with a central transmission area and a peripheral reflection area; adjusting the pose of the optical axis marking element, so that the center of the optical axis marking element is aligned and calibrated with the standard incident optical axis; replacing wavefront detection equipment with a working light source, and judging the eccentricity and inclination state of an incident light axis of the working light source relative to a standard incident light axis according to the form and position relation of reflected light and incident light of the working light source; and adjusting the pose of the incident optical axis of the working light source to align the incident optical axis of the working light source with the center of the optical axis marking element. The defects of tedious operation and low adjustment efficiency in the adjustment process of the incident optical axis and the optical axis of the illumination system in the prior art are overcome.

A camera module includes: an image sensor; and a lens assembly including at least seven lenses aligned along an optical axis and configured to guide light from outside the camera module to the image sensor, where the at least seven lenses include: a first lens farthest from the image sensor and including a convex surface on a sensor-side surface thereof, the first lens having negative refractive power; a second lens between the first lens and the image sensor, and having positive refractive power; a third lens between the second lens and the image sensor, and having positive refractive power; a fourth lens between the third lens and the image sensor, and having positive refractive power or negative refractive power; a fifth lens between the fourth lens and the image sensor, and having negative refractive power.

The ease of optical axis alignment is improved when a light curtain is attached to a mounting tool. The mounting tool is a component for attaching a light curtain housing to a base, with the housing forming a plurality of optical axes along a longitudinal direction. The housing includes a side wall section that is essentially parallel to the optical axes in cross-sectional view and orthogonal to the longitudinal direction.The fastening tool comprises a base part that is attached to the base and receives the housing from a front side, a temporary fastening part that temporarily secures the housing to the base part by elastic support, and a complete fastening element that fully fixes a rotational position of the housing about an axis and an upper-lower position in the longitudinal direction by pressing the housing in a state where it is temporarily attached to the base part. The base part includes rotation limiting elements that bear against the side wall section of the housing to restrict the rotation of the housing about the axis within a confined range in a state where the housing is temporarily attached to the base part.

The embodiment of the invention provides an optical axis alignment method and alignment device for an optical film assembly. The optical axis alignment method of the optical film assembly comprises the following steps: inputting linearly polarized light to a phase delay film, and controlling a fast axis or a slow axis of the phase delay film to be aligned with an optical axis of a polarizing film; the phase delay film is controlled to rotate by 45 degrees so that the fast axis 45 degrees or the slow axis 45 degrees of the phase delay film can be aligned with the optical axis of the polarizing film.

The present invention relates to a laser-based device (10) and to a method for determining the focus position of a process laser beam (22) in relation to a workpiece surface (100) and / or for contrast determination on a workpiece surface (100), optionally comprising or cooperating with a device (11) for providing the process laser beam (22), and optionally one or more optical devices (12, 13, 14) for shaping and / or deflecting the process laser beam (22). In order to determine the focus position of a process laser beam (22) in a simple and reliable manner, the device (10) comprises the following: a determination device (10a) which is configured as a device for determining the focus position of the process laser beam (22) in relation to the workpiece surface (100) and / or for determining the contrast on the workpiece surface (100). The determination device (10a) comprises a device (20) for providing a measuring laser beam (23) which is aligned in the beam direction in front of the focusing device (15) parallel to an optical axis (26) of the device (10a) and which is provided in an optical offset position (30 ) relative to the optical axis (29), a focusing device (15) for focusing the measuring laser beam (23) onto the workpiece surface (100) and a detector device (19) which is designed to receive the measuring laser beam (24) reflected back from the workpiece surface (100) and to generate a measuring signal (26) related to the focus position and / or the contrast.

An electroactive lens provides simultaneous focusing at two different optical refractive powers. It achieves this using a stack of electroactive lens elements aligned along the same optical axis, each focusing light in a different polarization state (e.g., horizontal and vertical polarization). If the first and second electroactive lens elements have different optical refractive powers, light in the first polarization state can be focused to one optical refractive power, and light in the second polarization state can be focused to different optical refractive powers simultaneously. The electroactive lens can switch between different single and multiple optical refractive powers. People with presbyopia can use electroactive lenses mounted in eyeglasses instead of conventional bifocal glasses. Electroactive lenses can also be used in scopes to improve target aiming.

Systems and methods for operating a cabinet irradiator. The methods comprise: receiving a sample holder in a receptacle of an XYZ stage platform of the cabinet irradiator (sample(s) is(are) disposed on the sample holder); controlling the XYZ stage platform to move the sample holder under a camera such that an optical axis is centered over a sample area of the sample holder; displaying a top-down image of the at least one sample in a first graphical user interface along with at least one virtual box having an adjustable size and being movable relative to the top-down image; receiving a user input specifying at least one area of the at least one sample that is to be irradiated via movement and or resizing of the at least one virtual box; receiving a user input selecting or defining an irradiation treatment plan; and irradiating the sample(s) in accordance with irradiation treatment plan.

A bonding structure (100) and method for actively aligning the optical axis (OAX1) of a semiconductor optical device (20) with the optical axis (OAX2) of an optical circuit (30) on a substrate (10), and a photonic integrated circuit (110). The bonding structure (100) includes at least one first bonding member (11) on the substrate (10) for initially bonding the semiconductor optical device (20) to the substrate (10), and the first bonding member (11) is made of a material such as a porous metal that exhibits plastic deformation to enable deformation of the at least one first bonding member (11) during active alignment. Further, the bonding structure (100) includes at least one second bonding member (12) on the substrate (10) for secondarily bonding the semiconductor optical device (20) to the substrate (10) upon completion or after active alignment.

This embodiment relates to a camera device, including: a camera module including a first substrate, an image sensor disposed on the first substrate, and a lens disposed at a position corresponding to the image sensor; a first driving unit for rotating the camera module about a first axis perpendicular to the optical axis of the image sensor; a second driving unit for rotating the camera module about a second axis perpendicular to the first axis and the optical axis; and a third driving unit for rotating the camera module about the optical axis, wherein when the camera module moves by means of at least one of the first driving unit, the second driving unit, and the third driving unit, the lens moves together with the image sensor while aligning with the optical axis.

A thermal image-forming attachment for a sighting apparatus has a combiner for overlaying a generated thermal image from a display against a visible scene defined along an optical axis of the sighting apparatus, wherein the combiner intersects the optical axis between an objective lens and the visible scene. A first IR camera has a first field of view aligned with the sighting apparatus optical axis; a second IR camera has a second field of view narrower than the first field of view, aligned with the sighting apparatus optical axis. An image processor generates the thermal image on the display, wherein IR image content rendered from the second IR camera is centered within IR image content from the first IR camera. Collimating optics project the thermal image from the display toward the combiner as collimated light aligned with collimated light from the visible scene.

The invention provides a method and system for measuring the rotating speed of a rotating object based on a multi-core optical fiber, and the method comprises the steps: generating a detection light field with a specific space structure, transmitting the detection light field through the multi-core optical fiber, and carrying out the phase modulation, thereby obtaining an emergent light field with a preset structure; irradiating a rotating object by using the light field, receiving a reflected signal and returning through the same path, and detecting the intensity change of the signal to obtain a time domain signal; frequency shift information is obtained through frequency domain analysis, and the angular velocity is calculated. According to the method, through combination of the spatial light modulator and the multi-core optical fiber, multi-degree-of-freedom flexible regulation and control of a light field are realized, and the limitation of insufficient regulation and control degree of freedom in the prior art is broken through; the requirement on optical axis alignment precision is reduced by utilizing the structured light field; the system miniaturization is realized by adopting the flexible multi-core optical fiber, and the application problem in a narrow space is solved; parallel transmission and anti-interference characteristics of the multi-core optical fiber are brought into full play, and the measurement stability and precision in a complex environment are remarkably improved in cooperation with digital phase conjugation and transmit-receive integrated design.

An optical probe includes a medium through which an optical signal propagates; a plano-convex first lens disposed on a first surface of the medium with a bottom surface facing the medium; and a plano-convex second lens which constitutes a compound lens in which a bottom surface of the second lens is connected to the bottom surface of the first lens by aligning an optical axis of the second lens and an optical axis of the first lens. The second lens is embedded in the medium and has a curvature radius of a convex surface larger than that of the first lens. A refractive index of the medium is larger than a refractive index of the compound lens.

This invention provides a laser beam tuning and alignment system suitable for long-distance, high-power energy transmission in space. The system is mounted on a space-integrated rigid platform, which serves as a unified optical axis reference plane. Along the optical axis, a laser output module, a shaping and collimation module, a wavefront compensation module, a beam expander assembly, a coarse pointing mechanism, and a fast-turning mirror are sequentially arranged. A collaborative control unit and a thermal stabilization unit are also located on this platform. A remote detection unit is located at the remote receiver and connected to the collaborative control unit via a communication link. This invention employs a unified optical platform and coaxial mounting design, eliminating the accumulation of assembly and deformation errors associated with separate beam expanders and pointing modules at the structural level. This significantly improves the coaxial stability of the optical axis under large-aperture beam expansion conditions. Through the coordinated control of divergence angle stabilization and precise optical axis alignment, this invention ensures the stability of the power density per unit area at the remote end over a transmission distance of 100 km, significantly improving the space laser energy coupling efficiency and transmission performance.

The embodiment of the invention provides a laser tracking method for a vector optical phased array system, and the method comprises the steps: repeatedly carrying out the operation of optical axis adjustment in a first maneuvering duration, keeping still in a second maneuvering duration, and carrying out the staring leapfrogging operation until a first end moment, and setting a time-sharing tracking mechanism, dependence on complex and huge tracking equipment in the prior art is avoided, the complexity of a space light detection part is remarkably reduced, the size and weight of the whole system are further reduced, and the terminal is controlled to alternately execute optical axis adjustment, so that the terminal can gradually improve the coupling efficiency according to received light intensity signal feedback, and the coupling efficiency is improved. According to the invention, the method guarantees the establishment and maintenance of a stable communication link, greatly simplifies the space light detection, and effectively reduces the size and weight of a vector optical phased array system.

The embodiment of the application provides a data transmission system and method between mobile devices, and relates to the technical field of data transmission. The system comprises a quantum key distribution link calibration subsystem and a quantum key distribution subsystem; wherein the quantum key distribution link calibration subsystem is located at a sending end, and is used for automatically completing optical axis calibration at the initial stage of optical link establishment, preparing a low-noise quantum channel for the quantum key distribution subsystem, and comprising: an optical axis alignment module, which is used for realizing accurate alignment of the direction of the sending end emission optical axis and the receiving end receiving optical axis; and a system performance verification module, which is used for monitoring the quantum error rate of the link, and determining that the link calibration is successful when the error rate is reduced to below the threshold value specified in the security protocol. The embodiment provided by the application improves the data transmission security between mobile devices.