182 results about "Retroreflector" patented technology

A device including an optical aperture comprising a plurality of outwardly facing modulating retroreflectors (MRR) disposed at a same radius about a center point; wherein each of the MRRs comprises a plurality of reflectors coupled to a modulator. A number and arrangement of the reflectors is configured to enable positioning of the aperture from a ranging measurement of a coordinate of the modulator using retroreflections of laser beams back to at least one base station after transmission from the at least one base station and when the aperture is attached to an airborne or spaceborne unmanned vehicle.

The invention relates to a self-coherence optical fiber interference device and method for simultaneously measuring morphology and thickness. The device comprises a light source module (1), a measurement light path (2), a compensation light path (3), a spectrograph (4), a mechanical motion module (6) and a data processing module (5), the measuring light path (2) comprises an optical fiber circulator (21), an optical fiber retroreflector (22) and an optical probe (23) and is used for realizing focusing measurement and enabling reflected light of the end face of the optical fiber retroreflector (22) and reflected light of a transparent object to be measured to return; reflected light of the end face of the optical fiber retroreflector (2) and reflected light of the transparent object to be measured form a measuring light beam, and the measuring light beam enters the compensation light path (3); the compensation light path (3) comprises an optical fiber splitter (31), an optical fiber delay line (32) and an optical fiber coupler (33), the measuring light beam is subjected to optical path compensation to generate a compensation light beam, and the compensation light beam and the measuring light beam are combined and input into the spectrograph (4) together.

A measuring device (10) for frequency-based position determination of a movable component (226) in an optical system (200) for microlithography comprises two optical resonators (16-1; 16-2), each with two resonator mirrors (20-1, 22-1; 20-2, 22-2), which each enclose a resonator cavity (18-1; 18-2), wherein the resonator cavities have different lengths, and a common retroreflector (14) for both resonators, which is configured to direct a respective measuring radiation (24-1; 24-2) back and forth between the respective resonator mirrors of the two resonators.

A spectroscopy system including a base station having a reflecting telescope and a laser light source coupled to the telescope, the laser providing an outgoing light signal; at least one Unmanned Aerial Vehicle containing a mobile retroreflector configured to receive the light signal from the laser and return a light signal back to the telescope; a detector to record the intensity of the returning light signal; and optical components for spectroscopic measurements, the optical components utilizing the intensity of the returning light signal, revealing the presence of a chosen narrow band for the purpose of detecting a target.

And the amplification compensation repeater is used for controlling the image position. Embodiments are disclosed that are configured to optically relay laser energy beams propagating along an optical path to a scanning lens. In one embodiment, a system includes a first locator configured to move a scanning lens, and an optical repeater system configured to relay a beam path to an entrance pupil of the scanning lens. The optical repeater system includes an optical repeater having a first lens, a second lens, a first retro-reflector configured to direct a beam path to the optical repeater, a second retro-reflector, and a third retro-reflector, the second retro-reflector and the third retro-reflector located on opposite sides of the scanning lens. A second retroreflector and a third retroreflector may be located between the first lens and the second lens. The first retro-reflector is movable relative to the second retro-reflector and the third retro-reflector, and the first positioner is configured to move the scanning lens relative to the second retro-reflector.

The invention relates to a projection system having - a projector (22, 22'); and - a retroreflector (23), wherein the projector (22, 22') illuminates the retroreflector (23) and the retroreflector (23) reflects in a certain solid angle range.

The invention relates to the technical field of satellite protection, in particular to an anti-laser broadband efficient retroreflector for satellites, which comprises a metal substrate, a phase change alloy array, a retroreflection microstructure array and a multi-layer optical dielectric film, and is characterized in that the metal substrate is of a hollow box type structure consisting of an upper substrate, a lower substrate and side plates with grids; the phase change alloy array is arranged in the metal substrate and is composed of an Al-Si alloy phase change material; the retro-reflection microstructure array is arranged above the upper substrate, the bottom of the retro-reflection microstructure array is triangular, hexagonal or rectangular, and the top of the retro-reflection microstructure array is of a pointed cone structure composed of three inclined planes; and a plurality of layers of optical medium films are plated on the surface of the retroreflection microstructure array. The Al-Si alloy layer prepared through the substrate can absorb a large amount of heat through phase change, so that the laser damage threshold value and the protection performance are improved, and efficient retroreflection of incident laser is achieved.

The present inventive concept relates to a target for use in surveying applications, said target comprising: a base element having a central axis, a reflector for reflecting light beams being incident on said target, said reflector including a plurality of retroreflectors arranged around said central axis to cover an angular area of substantially 360 degrees, wherein said reflector has an outer circumference and an inner circumference as defined by the arrangement of the retroreflectors and wherein a retroreflector has a first side located at the outer circumference and a second side located at the inner circumference; and a plurality of light emitting elements providing a plurality of apparent light sources arranged around said central axis, wherein an apparent light source is positioned within the inner circumference of the reflector for emitting light in a direction away from the central axis of the base element.

The present invention relates to a device (10) for amplifying laser radiation with a laser crystal (1), in particular a plate-shaped one, and with at least two reflection devices (2, 3) for the laser radiation to be amplified, which are configured to reflect the laser radiation such that the laser radiation is passed back and forth multiple times through the laser crystal (1), wherein the reflection devices (2, 3) are designed as retroreflectors. The invention further relates to a method for amplifying laser radiation in which the laser radiation to be amplified is passed back and forth multiple times through a laser crystal (1), in particular a plate-shaped one, by means of two reflection devices (2, 3), wherein the reflection devices (2, 3) are designed as retroreflectors.

The invention discloses a laser collimation measurement system and method for a digital compensation light drift angle, and belongs to the technical field of precision measurement, and the system comprises a laser output unit, a collimating lens, a light drift angle measurement unit, a straightness measurement unit, a two-dimensional angle measurement unit and a signal processing unit. The light drift angle measuring unit measures the light drift angle through a light retroreflector, a lens and a photoelectric detector, the straightness and two-dimensional angle measuring unit obtains original measuring signals through an optical splitter and the photoelectric detector, and the signal processing unit receives signals of all the photoelectric detectors. And calculating a real straightness error and a real angle error of the measured object, and performing digital compensation on a measurement error caused by a light drift angle. Through one-way optical path design, common-path compensation and a digital algorithm, the influence of the light drift angle on the measurement precision in long-distance measurement is effectively suppressed, and the method is suitable for high-precision geometric error measurement of large equipment such as a gantry machine tool.

The invention relates to a system (1) for digital holographic imaging, comprising at least the following components: a beam splitter (2) that defines four sides with a beam splitter surface (2a), a retroreflector array (3) that is arranged on the second or the third side (22, 23) and comprises a plurality of retroreflector elements (30), and a reference mirror (4) that is arranged on an adjacent side (23, 22) to the retroreflector array (3), wherein the system (1) is configured to impress wavelength-dependent phase shifts on object light (100) for each retroreflector element (3), said phase shifts being different for a plurality of retroreflector elements (3).

A device for determining the pitch angle (β) and / or the roll angle (γ) of a motor vehicle (4) comprises: at least one retroreflector (16a, 16b, 16c) having a plurality of reflector elements (18) and attachable to a surface of the motor vehicle (4); at least one image acquisition device (10) designed and configured to take at least one image of the motor vehicle (4), wherein the at least one image also includes an image of the at least one retroreflector (16a, 16b, 16c); and an evaluation device (14) designed and configured to evaluate the at least one recorded image in order to determine the pitch angle (β) and / or the roll angle (γ) of the motor vehicle (4).

The present inventive concept relates to a target (10) for use in surveying applications, said target (10) comprising: a base element (100) having a central axis (102), a reflector (110) for reflecting light beams being incident on said target (10), said reflector (110) including a plurality of retroreflectors (140) arranged around said central axis (102) to cover an angular area of substantially 360 degrees, wherein said reflector (110) has an outer circumference (112) and an inner circumference (114) as defined by the arrangement of the retroreflectors and wherein a retroreflector (140-1) has a first side (142) located at the outer circumference (112) and a second side (144) located at the inner circumference (114); and a plurality of light emitting elements providing a plurality of apparent light sources (160) arranged around said central axis (102), wherein an apparent light source (162) is positioned within the inner circumference (114) of the reflector (110) for emitting light in a direction away from the central axis (102) of the base element (100).

A spherically mounted retroreflector comprising an optic inlay, the optic inlay comprising a retroreflector having a vertex and an axis of symmetry, and a carrier having an at least partly spherical outer surface and a cavity, wherein the optic inlay is arranged in the cavity, and wherein the at least partly spherical outer surface has a sphere center, which sphere center coincides with the vertex, wherein the optic inlay is connected to the carrier. The optic inlay comprises a coupling portion, and the spherically mounted retroreflector comprises a coupling element arranged between the optic inlay and the carrier.

Low dispersion reflector. A retroreflector comprising a front boundary surface configured for incoming measurement light into the retroreflector, a back boundary surface configured for reflecting the measurement light as reflected measurement light. The front boundary surface and the back boundary surface are arranged on opposite sides of the retroreflector and define an optical axis by the arrangement of the front boundary surface and / or the back boundary surface, wherein an angle of incidence of the measurement light relative to the optical axis is equal to an angle of exit of the reflected measurement light relative to the optical axis. A first optical element comprising the front boundary surface and a second optical element comprising the back boundary surface are provided. The front boundary surface and the back boundary surface are of a curved shape, the first optical element and the second optical element have different shapes and / or sizes, the first optical element is connected to the second optical element, and the retroreflector is configured such that the measurement light entering the retroreflector at the front boundary surface is focused at the back boundary surface.

The invention relates to a lighting device for a vehicle, having a flat light guide unit (2) for generating a predefined light function, comprising: opposite flat sides (9, 10), on which coupled light (L1, L2) can be totally reflected within the flat light guide (8) in a light guide direction (11); the invention relates to a lighting device (1) having a flat side (2), a narrow side (12, 12 ') connecting the flat side, at which light energy generated by a light source (13) is coupled into a flat light conductor, and having a retroreflector unit (3) for generating a retroreflective function, which retroreflector unit comprises a plurality of retroreflective elements (18) arranged in a plane, the retroreflector unit is arranged offset from the flat light conductor of the flat light conductor unit in the main emission direction (H), the flat light conductor of the flat light conductor unit being arranged downstream of the retroreflector unit in the main emission direction.

The utility model discloses a laser tracker target ball, including the spheroid, the spheroid has the cavity, be equipped with the opening of the intercommunication cavity on the spheroid, the opening place threaded connection has the compression circle, is equipped with the lens seat and cubic angle retroreflector in the cavity, and the compression circle is equipped with the sheath between the lens seat. The utility model discloses a laser tracker target ball, cubic angle retroreflector and lens seat are fixed after preliminary calibration, and after being loaded into the target ball inside, it is convenient to adjust the relative spatial relation. After product is completed, optical and physical structure are relatively stable, and the ability that resists external interference is strong. Compression circle structure design is reasonable, and cooperate sheath, play the role of reinforcing the internal structure of spheroid, form protection to cubic angle retroreflector again, improve the service life of target ball. Spheroid and base adopt magnetic attraction force connection, and the installation dismounting is convenient, promotes work efficiency and guarantees the measuring accuracy.

The invention discloses a pipeline support structure for a vacuum delay line system of a long baseline optical interferometer, which comprises a vacuum pipeline, a cat eye type retroreflector, a linear motor module and an inner support assembly, and is characterized in that the inner support assembly comprises a plane adapter plate and a fillet lower collet, the plane adapter plate is connected with a guide rail system, and the guide rail system is connected with the linear motor module; the lower side of the fillet lower bottom support is of an arc-shaped structure and is fixedly attached to the inner wall of the vacuum pipeline. The supporting structure further comprises an outer supporting assembly, and the outer supporting assembly comprises two outer supporting fixing pieces symmetrically installed outside the vacuum pipeline. The supporting structure has good installation planeness, structural stability and adjustment flexibility, can effectively solve the problems that in the prior art, a supporting structure in a round pipe is insufficient in stability and cannot be adjusted, and the installation precision is difficult to guarantee, and is particularly suitable for a precise astronomical optical instrument installation platform which is strict in high planeness and vacuum environment requirements.

The invention relates to an arrangement for an optical component of a lighting device for a motor vehicle and a lighting device for a rear region of a motor vehicle. The invention relates to a lighting device, comprising a plurality of light sources, a light guide having an entry surface and an exit surface, and a cover plate, the lighting device being designed such that light generated by the light sources at least partially enters the at least one light guide through the entry surface, exits the light guide through the exit surface, and exits the lighting device through the cover plate, according to the invention, the lighting device is provided for generating a light function of the tail lamp, the brake lamp and the driving direction indicator, the exit surface of the light guide serves at least partially as a light-emitting surface for the light function of the brake lamp and the driving direction indicator, and the light-emitting surface has a dimension of at least 50 cm2. The lighting device may include an arrangement of optical members, the retroreflector being arranged behind the light conductor such that light impinging on the light conductor passes through the light conductor, impinging on the retroreflector, reflected back by the retroreflector, and again passes through the light conductor.

Apparatus for and method of aligning optical components such as beam splitters in an optical pulse stretcher in which a landing spot of a beam which has traversed a portion of the optical beam splitter and a coincident landing spot of a beam split from a retroreflected input beam are made to align on a target spot. Also disclosed is an apparatus and method for aligning the retroreflector to facilitate proper beam alignment. A fluorescent material may be used to render a beam landing spot visible.

Disclosed is a phase measurement device, comprising: a first wave plate, a first polarization splitting prism, a fourth wave plate, a retroreflector, a third wave plate, a reflector, a second wave plate, a polarizer, a second polarization splitting prism, a third polarization splitting prism, a first photoelectric detector, a second photoelectric detector, and a base, wherein the first to third polarization splitting prisms and the first and second photoelectric detectors are fixed on the base; the first to fourth wave plates are respectively arranged around the periphery of the first polarization splitting prism; the polarizer is arranged on an emitting surface of the third polarization splitting prism; the retroreflector is arranged on an outer side of the fourth wave plate; and the reflector is arranged on an outer side of the third wave plate. An interferometric signal is resolved to obtain a measurement light beam phase.

This reflector comprises: a deflection optical member (5) that is provided on an incident optical axis (3) of measurement light and reflects the measurement light; and a retroreflector (6) that retroreflects the measurement light on a reflection optical axis (3') of the deflection optical member. The reflector is configured to form a virtual image of the optical center of the retroreflector on an extension of the incident optical axis.

This invention discloses a fully polarized omnidirectional matched retroreflector based on optical void materials. It mainly consists of a metal shell, which is a concave block. The two convex ends of the metal shell face the incident direction of external electromagnetic waves and serve as the input and output ends of the fully polarized omnidirectional matched retroreflector, respectively. Hollow TM wave air tunnels and TE wave air tunnels are respectively formed inside the metal shell. Both the TM wave and TE wave air tunnels are concave blocks with the same shape as the metal shell. The TM wave and TE wave air tunnels connect from the input end to the output end of the fully polarized omnidirectional matched retroreflector. This invention has a simple structure and can be implemented using only metal. It can work for fully polarized incident waves at all angles and can be widely used in radar target modeling and sensing fields.

The invention relates to a measuring device (10) for the frequency-based determination of the position of a movable component (226) in an optical system (200) for microlithography, comprising two optical resonators (16-1; 16-2) each having two resonator mirrors (20-1, 22-1; 20-2, 22-2) which each enclose a resonator cavity (18-1; 18-2), wherein the resonator cavities have different lengths, and comprising a common retroreflector (14) for the two resonators, which retroreflector is configured to guide respective measurement radiation (24-1; 24-2) back and forth between the respective resonator mirrors of the two resonators, wherein the measuring device is configured such that, while the position of the movable component is being determined, an influence of a refractive index of a medium within the resonator cavities is prevented from affecting the result of the position determination.

Provided is a technique capable of achieving the thinning of a system or an air floating video display apparatus and the reduction in the influence of heat of a light source apparatus and the like. An air floating video display apparatus includes a light source apparatus, a display panel configured to emit light from the light source apparatus as video light, and a retroreflector configured to reflect the video light from the display panel to form, by the reflected light, the air floating video that is a real image in air, the light source apparatus includes a light source, a reflector configured to reflect light from the light source, and a light guide configured to guide light from the reflector toward the display panel, and the light guide includes a nearest portion having a recess.

An apparatus, system, and computer-implemented method that correct for thermal drift in one or more optical elements in an optical device and maintain high precision accuracy of the optical device during extreme temperature changes. The apparatus includes an optical device having an optical element configured to direct or reflect a light beam, a pivot support configured to hold a portion of the optical element and facilitate motion of the optical element in multidimensional space, a controller configured to determine a displacement of the optical element due to thermal drift and generate an actuator drive signal based on the amount of the displacement, and an actuator configured to receive the actuator drive signal and counteract the thermal drift by moving, in cooperation with the pivot support and in response to the actuator drive signal, the optical element by an inverse amount and direction of the displacement of the optical element.

A reflector (3) is provided with an optical member (7) having at least four reflective surfaces that internally reflect incident measurement light. The optical member includes a retroreflector comprising, among the reflective surfaces, three surfaces that are capable of retroreflection. At least one of the reflective surfaces constitutes an optical deflection unit that deflects the incident measurement light so as to guide the same to the retroreflector and that deflects the measurement light having been retroreflected by the retroreflector so as to emit the same in a direction opposite to the direction of the incident measurement light. Further, the optical member is configured such that a virtual image of the optical center of the reflector is formed on the extension of the incident optical axis.

An air floating video with high visibility suitable for use in a vehicle is provided that contributes to Sustainable Development Goals 3: “Ensure healthy lives and promote well-being for all at all ages,” and 9: “Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation.” The air floating video display apparatus includes a housing which is attachable at a position near a ceiling or a rearview mirror in the vehicle and stores a video display apparatus. A retroreflector on which a λ / 4 plate is provided and a polarization separation member arranged at a predetermined angle are provided outside the housing. A video light of a specific polarized wave from the video display apparatus is subjected to polarization conversion via the polarization separation member, the retroreflector, etc., and an air floating video is displayed at a predetermined position on the basis of the video light of the other polarized wave.

The present invention concerns a system for generating quantum keys between two nodes of an optical communication network. The system comprises a transmitting node and a receiving node, operationally connected to each other by at least one birefringent optical communication channel. The transmitting node comprises a photon source, an optical port adapted to transmit and receive photons on the optical communication channel, a detector assembly adapted to detect and count photons received from the receiving node. The receiving node comprises an optical port for receiving and transmitting photons on the optical communication channel, and a photon emitter adapted to emit at least one photon in response to the at least one photon transmitted by the transmitting node. The photon emitter comprises at least one birefringent element. Advantageously, the receiving node comprises control means of the photon emitter. The control means are adapted to adjust a birefringence of the at least one birefringent element as a function of polarization information associated with the at least one photon transmitted by the transmitting node. In particular, the polarization information is extracted from the at least one photon transmitted by the transmitting node or is provided by the transmitting node. Advantageously, the photon emitter comprises an emulator device of a Faraday rotator mirror or comprises a retroreflector consisting of three mirrors orthogonal to each other and rotated by 45° around respective orthogonal axes. The Faraday rotator mirror and the retroreflector are orientable in space to reflect the at least one photon transmitted by the transmitting node uniquely and determined when oriented appropriately.