31 results about "Prism pair" patented technology

The invention belongs to the technical field of laser, and particularly discloses a beam shaping system and method based on prism pair orthogonality and cascade, and the system comprises a single-mode fiber, an aspherical lens, a first prism pair, a first parallel plate, a second prism pair and a second parallel plate which are sequentially arranged along the direction of an optical axis. A Gaussian beam emitted by a single-mode optical fiber is collimated by an aspherical lens to form a parallel beam, the beam is expanded or compressed in the X direction by a first prism pair, the beam is expanded in the Y direction by a second prism pair, and two inclined parallel plates are respectively used for compensating the beam offset in the X / Y direction; according to the invention, the circular Gaussian beam emitted by the single-mode fiber can be shaped, a large strip-shaped collimation light spot with an adjustable length-width ratio from 4: 1 to 20: 1 and a long axis size of 30mm can be realized, and the central positions of the input and output beams in the cross section are ensured to be unchanged.

The invention relates to a visual and optical feedback combined optical element rapid alignment method and device, and the method comprises the steps: plane mirror alignment and beam splitter prism alignment, the plane mirror alignment establishes a reference optical axis for beam splitter prism alignment, and visual feedback coarse alignment and optical feedback fine alignment are successively adopted in the two stages. During visual feedback coarse alignment, the inclination angle of the plane mirror or the beam splitter prism is calculated and adjusted according to the coordinates of light spots on the imaging screen, so that the light spots return to the target center or coincide with the target center; during optical feedback fine alignment, spiral gradient rising is adopted to search and adjust the inclination angle of the beam splitter prism, so that the reflected light intensity is maximum. The alignment device comprises a clamp which is used for fixing a gradient refractive index lens and is provided with an imaging screen in the direction of a light emitting surface, a side surface imaging device, a first rotating platform fixed with a plane mirror, a second rotating platform for clamping a beam splitter prism and the like. By utilizing the method and the device, the alignment precision and the alignment efficiency of the gradient refractive index lens, the beam splitter prism and other optical elements can be improved.

The invention belongs to the field of laser radar systems, and discloses a three-dimensional imaging single-photon laser radar system based on multi-beam eye-like scanning, which is composed of a laser, a DOE, a perforated reflector, a Risley scanning prism, a telescope, a detector array, a time-to-digital converter and a two-dimensional holder. The laser generates a detection light beam, the detection light beam passes through the DOE to generate a two-dimensional light beam array, the light beam array passes through a small hole in the center of the perforated reflector, a view field range is scanned through the Risley prism, and a scanning path is an eye-like pattern; echo signals enter along the same optical axis through the Risley prism, are reflected to the telescope through the perforated reflector and are converged to the detector array through the telescope, and photosensitive surfaces of the detector array correspond to view fields of the detection light beam array one to one.

A light emitting module includes a semiconductor laser, a collimating lens for that collimates light beam output from the semiconductor laser, a prism pair including two substantially triangular-plate-shaped prisms, each passing the light beam between two end surfaces on both sides of one apex angle to refract the light beam, and the prisms being sequentially arranged on an optical path of the light beam in such a manner that the orientations of apex angles of the prisms are opposite to each other, and a rotary stage configured to hold the prism pair and to be rotatable about a rotation axis C extending in a prism thickness direction in such a manner that an incident angle of the light beam entering the prism positioned on the upstream side of the optical path is changed.

The utility model discloses a batch detection jig for cavity surfaces of edge-emitting lasers. The batch detection jig comprises a support frame; the at least three reflectors are sequentially embedded in the supporting frame, so that the parallel incident light is emitted upwards after the angle is changed; and the at least three fixing devices are fixed on the support frame, are in one-to-one correspondence with the reflectors, and are used for fixing an edge-emitting laser and enabling reflected light of a cavity surface of the edge-emitting laser to penetrate through the reflectors to be emitted upwards. According to the utility model, the reflecting prism can be utilized to carry out appearance detection on the cavity surface of the edge-emitting laser in the loading tray. Pollution or damage risks caused in the process that the laser needs to be taken and placed in a traditional detection mode are overcome, and efficiency is improved.

The utility model discloses a transformer partial discharge monitoring devices based on arc spectrum analysis has energy quartz optical fiber, and one end of energy quartz optical fiber is sleeved with quartz sleeve, and the end of quartz sleeve is provided with focusing lens, and the other end of energy quartz optical fiber is connected with optical fiber flange through ceramic plug core, and the emergent light path of optical fiber flange is sequentially and interval provided with convex lens, visible light split prism and ultraviolet light split prism, and visible light split prism produces reflection to the visible light of 450~780nm wavelength, and ultraviolet light split prism produces reflection to the ultraviolet light of less than 280nm wavelength, and the reflection light path of visible light split prism is provided with silicon light detector, and the reflection light path of ultraviolet light split prism is provided with first ultraviolet light detector, and the transmission light path is provided with second ultraviolet light detector, and silicon light detector, first ultraviolet light detector and second ultraviolet light detector all are electrically connected with MCU through data acquisition card.

The application discloses a precision surface three-dimensional appearance measurement device and method based on phase shift digital holography, which comprises the following modules: a light beam splitting module for generating a reference light and an object light beam irradiated to the surface of a measured object and returned; a reference light beam adjusting module for receiving the reference light generated by the light beam splitting module, generating different reference light beams based on different voltage forces, and generating different reference light beams after different brightening and increasing; a lens imaging system for receiving the object light beam generated by the light beam splitting module and performing light beam amplification; a second polarization beam splitter for receiving the different reference light beams generated by the reference light beam adjusting module and the amplified object light beam of the lens imaging system, and performing light beam combination; a linear polaroid for respectively interfering a series of light beams after combination; an image acquisition module for acquiring a series of interference images; and a computer for receiving the series of interference images transmitted by the image acquisition module, extracting phase information of the object light by using a phase shift algorithm, and realizing measurement of the three-dimensional appearance of the surface of the measured object.

The intelligent door lock face recognition lens comprises a supporting plate, a rotating seat, a lens assembly and a sliding plate, the rotating seat is rotatably installed on a supporting frame, the sliding plate is vertically connected with the supporting plate in a sliding mode, the lens assembly is installed on the rotating seat, and the lens assembly is connected with the sliding plate in a sliding mode. A first prism, a second prism and a third prism are fixedly installed on the supporting plate, light emitted by the lens assembly penetrates through the first prism and then is refracted upwards, the irradiation direction of the light emitted by the lens assembly penetrates through the second prism and then is kept unchanged, and the light emitted by the lens assembly penetrates through the third prism and then is refracted downwards. The intelligent door lock has the advantages that the first prism, the second prism and the third prism are switched to refract light by adjusting the pitching angles of the rotating base and the lens assembly on the supporting plate, images of the position height are collected on the fixed intelligent door lock, and the intelligent door lock can adapt to users of different heights.

The present application relates to the technical field of foundation pit measurement, and more particularly to a construction coordinate transfer method and coordinate measurement transfer system suitable for deep foundation pit; the construction coordinate transfer method comprises the following steps: preparing step: adjusting the center of the prism to be physically collinear with the steel wire rope; obtaining the coordinates of the reflecting sheet: taking the coordinates of the center of the prism in the construction coordinate system as the coordinates of the reflecting sheet on the steel wire rope corresponding to the prism in the construction coordinate system; obtaining the coordinates of the site at the bottom of the foundation pit: combining the coordinates of the reflecting sheet in the construction coordinate system, the coordinates of the site in the construction coordinate system are obtained according to the resection method, that is, the transfer of the construction coordinate from the ground to the bottom of the foundation pit is completed; without purchasing expensive special equipment such as laser plumb instrument, the construction cost is reduced, the space occupied by the support is small, the support does not need to be removed during layer-by-layer excavation, the construction process is reduced, the coordinate transfer process is relatively simple, and the precision is high.

The present application relates to a kind of light beam pointing stability large rotation angle tuning short wave infrared coherent light source, and the present coherent light source includes: pump laser, magneto-optical isolator, condensing lens group, two 45 ° reflector, optical parametric oscillator (OPO), optical filter, fixed right-angle prism and mobile right-angle prism.The pump laser is used to generate pump light;The magneto-optical isolator is used to ensure one-way transmission of laser;The condensing lens group is used to improve beam energy density;Two 45 ° reflector is used to fold pump light path;The optical parametric oscillator is used to generate coherent short wave infrared light;The nonlinear crystal is used to adjust the output wavelength of short wave infrared light source;The optical filter is used to block remaining pump light;Fixed right-angle prism and displacement right-angle prism are used to compensate the lateral displacement of output beam caused in the process of crystal rotation.The present application compensates the lateral displacement of light beam by moving prism, realizes the position of output beam unchanged in the process of large rotation angle tuning, ensures its directionality stability, and is suitable for spectral analysis, remote sensing and imaging and other needs.

The utility model provides a five-surface detection device for a chip, and relates to the technical field of chip detection. The five-surface detection device comprises a mounting platform, a visual mechanism, four prisms and four adjusting mechanisms, the mounting platform is provided with a vertically arranged through hole, a detected chip is placed at the through hole, the visual mechanism is mounted below the mounting platform, and the visual field of the visual mechanism is aligned with the through hole so as to perform visual detection on the detected chip. Each adjusting mechanism is mounted on the mounting platform and is correspondingly connected with one prism, and each adjusting mechanism is arranged to controllably drive the prism to move in the preset direction and / or drive the prism to rotate around the side edge direction of the tested chip so as to adjust the position of the prism. Therefore, the visual mechanism obtains the image of the corresponding side edge of the tested chip through the prism. According to the technical scheme, the position of the prism can be adjusted through the visual mechanism, so that the side edge image of the detected chip can be clearly obtained, and the accuracy of appearance detection of the detected chip is improved.

The application discloses a kind of multicolor semiconductor laser modules with shaping beam combining prism pair, comprising: first laser light path, several mutually parallel second laser light paths and main light path, second laser light path and first laser light path are parallel, first laser light path includes first laser diode, first aspherical collimating lens, first telescope and first shaping beam combining prism pair arranged in sequence, first shaping beam combining prism pair includes first shaping prism and second shaping prism, one side of second shaping prism is provided with coating layer, coating layer is used to reflect the light beam of first laser light path and transmit the light beam of second laser light path, the light beam of first laser light path and the light beam of second laser light path are combined to form main light path, first long-focus plano-convex lens and focusing lens are sequentially arranged on main light path, and focusing lens is arranged at the light emitting position on the multicolor semiconductor laser module.The application compared with prior art, can effectively reduce the size of laser module, and increase the stability of optical path.

An imaging lens assembly (21) according to the present disclosure comprises: a prism (31) that deflects light incident from an object side and emits the light to an image side, the prism (31) being made of a resin material; and at least one lens disposed on an image side of the prism (31), in which the imaging lens assembly (21) is configured to satisfy:-1.0 lt; ((PNd-1. 75) * PNd * 100) / PVd is less than or equal to-0.56; wherein PNd is the refractive index of the prism (31), and PVd is the Abbe number of the prism (31).

According to the detection device and method, a laser emits a point light source, a light beam is collimated through a non-curved mirror, the aperture of input parallel light is controlled through a three-piece type variable beam expanding mirror group, the light beam is shaped through a shaping prism, and the light beam is reflected by a reflector after penetrating through a focusing mirror and an optical wedge, so that the light beam is formed. The method comprises the following steps: obliquely irradiating the surface of a detected target at a specified angle, acquiring a light spot effect by cameras placed at symmetrical angle positions, and performing area scanning and image acquisition processing on a wafer after adjusting the size and uniformity of light spots according to detection requirements. According to the invention, the problem of uniformity of inclined incident light spots can be solved, the size of the detected light spots can be adjusted at the same detection position, and the detection precision and the detection speed in the detection process can be flexibly controlled.

An edge-emitting laser cavity surface detection jig is characterized by comprising a reflector fixed on a tray so as to enable reflected light of an edge-emitting laser on the tray to be emitted after the angle of the reflected light is changed; and the microscope is fixed on an emergent light path of the reflecting mirror and is used for carrying out appearance detection. According to the utility model, the reflecting prism can be used for detecting the appearance of the cavity surface of the edge-emitting laser in the loading tray, so that the pollution or damage risk caused in the process of taking and placing the laser in the traditional detection mode is overcome.

The utility model relates to a luminosity linear detection light source, which comprises an LED light source group, a condensing lens group and a refraction prism, the condensing lens group is arranged between the LED light source group and the refraction prism, the LED light source group comprises a first LED light source group and a second LED light source group, and the first LED light source group and the second LED light source group are in linear distribution. The condensing lens group comprises a first condensing lens group and a second condensing lens group; the refraction prism comprises a first refraction prism and a second refraction prism; the first condensing lens group, the first LED light source group and the first refraction prism are correspondingly arranged, the second condensing lens group, the second LED light source group and the second refraction prism are correspondingly arranged, the first condensing lens group and the second condensing lens group are symmetrically arranged and condense light inwards, and the first refraction prism and the second refraction prism are symmetrically arranged and refract light inwards. According to the utility model, the CCD visual system is more stereoscopic when being used for photographing a product, so that the problems of 2.5 D and edge defects on the surface of a non-reflective product are solved, and the practicability is high.

A galvanometric metrology system for near eye display metrology that uses two parallel channels that can be selectively operated to scan a biocular display without repositioning of the device. A pair of galvanometer sets are spaced apart from each other by a pupillary distance and coupled to a pair of autofocus lenses that each having optical fibers leading to one of a two slit array. A third galvanometer set selectively couples one of the pair of slits of the array to a spectrometer detector so that metrology of the biocular device can be sequentially switched between the two optical pathways to fully measure the optics of the biocular display. An anamorphic prism pair may be used to increase the efficiency of the transfer to the slits of the array.

The invention relates to the technical field of foundation pit measurement, in particular to a construction coordinate transmission method and a coordinate measurement transmission system suitable for a deep foundation pit. The construction coordinate transmission method comprises a preparation step: adjusting the center of a prism to be physically collinear with a steel wire rope; the coordinates of the center of the prism in the construction coordinate system are used as the coordinates of the reflector plate on the steel wire rope corresponding to the prism in the construction coordinate system; the coordinates of the stations in the construction coordinate system are obtained through calculation according to a resection method in combination with the coordinates of the reflector plates in the construction coordinate system, and transmission of the construction coordinates from the ground to the bottom of the foundation pit is completed; no expensive special equipment such as a laser plumb aligner needs to be purchased, the construction cost is reduced, the occupied space of the support is small, the support does not need to be dismantled during layer-by-layer excavation, the construction procedures are reduced, and the coordinate transmission process is relatively simple and high in precision.

The utility model discloses a connecting wire arranging machine photographing, taking and shifting device which comprises a positioning and wire pulling module, a CCD detection module and a wire taking and shifting module, the CCD detection module is arranged above the positioning and wire pulling module, the wire taking and shifting module is arranged on one side of the positioning and wire pulling module, and the CCD detection module is arranged on the other side of the positioning and wire pulling module. The positioning wire drawing module is used for fixing a connecting wire and flattening a plurality of core wires extending out of one end of the connecting wire, the CCD detection module is provided with at least one triangular prism and a CCD camera corresponding to the triangular prism, the triangular prism and the CCD camera are distributed at intervals front and back, during detection, the triangular prism is located above the flattened core wires, the CCD camera photographs the flattened core wires through the triangular prism, and the CCD camera is used for detecting whether the connecting wire is in a normal state or not. According to the utility model, the prism and the CCD camera which are distributed at intervals in the front-back direction are adopted, so that the installation position of the CCD camera can be lowered, and a worker can install, debug and maintain the CCD camera more conveniently.

The utility model belongs to the technical field of detection equipment, and particularly relates to naked battery cell appearance detection equipment which comprises a rack, a conveying device and an optical detection device, the optical detection device comprises a plurality of visual detection parts and a plurality of prisms, the visual detection parts are arranged on the side, above and / or below the conveying path of the conveying device, and the prisms are used for turning the imaging path of the visual detection parts, so that the visual detection parts can perform image acquisition on the to-be-acquired area of the naked battery cell. As the space occupied by the prism is far smaller than the space occupied by the visual detection part, the visual detection part can be transferred to other directions with sufficient space under the condition that the space in a certain direction is insufficient, and compared with the visual detection part which is arranged perpendicular to the to-be-collected area, the visual detection part can be transferred to the to-be-collected area; the imaging path of the visual detection part is turned by means of the prism, so that the setting position of the visual detection part can be adjusted, and the whole detection equipment can be suitable for the working environment with insufficient space.

The invention discloses a heat effect compensation device and method for a disc uniaxial crystal laser, and belongs to the technical field of solid lasers, the heat effect compensation device comprises a gain medium structure, and the gain medium structure comprises a uniaxial laser crystal used for generating laser in a multi-pass optical path; the multi-pass system comprises a parabolic mirror, a large prism pair and a small prism pair, and the parabolic mirror, the large prism pair, the small prism pair and the gain medium structure have an optical path interaction relationship and are used for realizing repeated reciprocating of laser in the single-axis laser crystal; the array type phase plate is used for compensating light beam wavefront distortion of the gain medium structure caused by the heat effect; and the phase plate bracket is used for adjusting the position of the array type phase plate, so that the array type phase plate can perform corresponding position adjustment according to the change of the laser heat effect. The problem that in a high-power disc laser, the quality of light beams is deteriorated due to the heat effect of anisotropic laser crystals is solved.

A system (11) within a vehicle (10) for communication with a person (50) in the vicinity of the vehicle (10), comprising the following: a perception system (38) that is connected to a control unit (34A) of the system (11), wherein the perception system (38) is capable of detecting the presence of a person (50) in the vicinity of the vehicle (10); a monitoring system (52) that is connected to the control unit (34A) of the system (11) and can monitor the position of the head and eyes of the person (50); a generator (55) for holographic images comprising the following: a visual computing machine (56) that communicates with the control unit (34A) of the system (11) and the monitoring system (52) and can compute a holographic image (58) and encode the holographic image (58) for a display (60) of an image generation unit (PGU) (62); and a beam guidance device (68), wherein: the beam guidance device (68) is designed to receive information regarding the position of the head and eyes of the person (50) from the monitoring system (52) via the visual computing machine (56); and The display (60) is designed to project the holographic image (58) onto the beam guidance device (68), and the beam guidance device (68) is designed to redirect the projected holographic image (58) to the eyes of the person (50) on the basis of the information received from the monitoring system (52). wherein the visual computing machine (56) is further configured to encode a lens function into the holographic image (58) on the basis of the information received from the monitoring system (52), wherein the beam guiding device (68) is a MEMS mirror, microelectromechanical systems, a two-galvanometer mirror, a rotating Risley prism pair or a one-dimensional illusion mirror in combination with a rotating polygon mirror.

The utility model relates to optical detection technical field, concretely relates to a kind of optical element surface defect detection device. Including: light source, and wavelength modulator, collimating beam expander module and interference detection module are sequentially arranged along the emergent light path of light source;Wherein, wavelength modulator is used to modulate the light incident as the polarization light of fixed direction and equivalent wavelength adjustable, collimating beam expander module is used to beam expander to greater than the area of optical element to be measured, interference detection module includes the light splitting prism corresponding with collimating beam expander module, and camera and plane mirror corresponding with light splitting prism, optical element to be measured is located in the side of light splitting prism, to make the light spot incident to light splitting prism respectively after plane mirror and optical element to be measured, after reflection, interference is formed again by being incident to light splitting prism, camera is used for monitoring interference fringe. By the above-mentioned mode, the problem that inherent modulation phase is not enough can be improved, and the accuracy of detection result when batch detection is improved.

The utility model relates to an optical module, a camera and an electronic device, the optical module comprises a first lens group, a second lens group and a prism, the first lens group is arranged at an object plane end, the second lens group is arranged at an image plane end, and the first lens group and the second lens group are arranged at the same side of the prism; wherein the light of the object plane end enters the prism through the first lens group, enters the second lens group after being reflected for multiple times in the prism, and is emitted to the image plane end for imaging after passing through the second lens group. According to the optical module, the first lens group and the second lens group are arranged, and the prism is used for reflecting and turning the light path for multiple times, so that the size of the optical module is smaller, the design requirements of imaging quality and miniaturization are considered, and the use experience of a user is improved.

An imaging spectrometer and camera are disclosed including a prism that refracts incident light a spectral range for spectrographic analysis with a shortest wavelength (λS) and a longest wavelength (λL). A diffraction grating is aligned with the prism and diffracts the incident light. The refraction and diffraction for a set of diffraction orders used for the spectrographic analysis both increase a deflection angle of the incident light from an original optical axis. The spectral range spans greater than an octave such that λL>2λS. The refraction and diffraction are such that a second diffracted order of λS does not overlap with a first diffracted order of wavelengths shorter than λL. The second order diffraction for wavelengths between λS and λC, and the first order diffraction for wavelengths between λC and λL, are detected in different spatial regions to perform the spectrographic analysis from λS to λL.

The present disclosure provides a compact fingerprint and finger vein combined scanner comprising a cemented prism pair (1') with first prism block (3) and second prism block (2), selective interference coating (7) between the prism blocks that transmits red wavelength light and reflects near-infrared wavelength light at different incidence angles, red LED (4) illuminating finger placement surface (6) on the first prism block (3), at least one near-infrared LED (5) illuminating the finger placement surface (6), imaging lens system (8) comprising First imaging lens (8a) and Second imaging lens (8b) arranged in sequence receiving light from the cemented prism pair (1'), aperture filter (9) between the imaging lens system (8) and imaging detector (10) with wavelength-selective filter transmitting red wavelength light and absorbing near-infrared wavelength light and central opening transmitting both wavelengths, and two-dimensional imaging detector (10) receiving light through the imaging lens system (8) and aperture filter (9).

The invention provides a high-aspect-ratio light beam generation device for atom interference. The high-aspect-ratio light beam generation device comprises a laser, and an optical fiber collimator, a deformation prism pair, a first plano-convex cylindrical lens, a second plano-convex cylindrical lens and a plane mirror which are sequentially arranged along a light path, laser emitted by the laser is collimated by the optical fiber collimator to form a Gaussian beam; the deformation prism pair is used for carrying out one-way beam expansion on the Gaussian beam in a first direction; the first plano-convex cylindrical lens is used for focusing the expanded light beam in a second direction to form a high aspect ratio light spot; the second plano-convex cylindrical lens is used for collimating the focused light beam, and the plane mirror is used for reflecting the collimated light beam, so that the reflected light beam returns along an original light path and is focused again through the second plano-convex cylindrical lens, and the reflected light beam coincides with the waist of the incident light beam to form a standing wave light beam. The device can stably and reliably generate an ideal Raman light field for atom interference, and provides technical support for improving the measurement precision and practicability of an atom interferometer.

The utility model relates to a kind of shield machine posture measuring devices, it includes prism and total station, the prism is installed in the tail of shield machine by fixed component, the prism is provided three, the placement position of three prisms is triangle type;The total station is fixed on the segment of already formed tunnel by support, the support is tripod, three total stations are set on the support, three total stations and three prisms one-to-one correspond and align, and the total station corresponding with the prism of top is fixed on the top of support, and the total station corresponding with the prism below is fixed by mounting plate and the support leg of tripod. The posture of the shield machine can be monitored quickly and accurately, and the construction quality is not affected by the poor posture control of the shield machine.

This invention discloses a self-collimating dual red dot sight, comprising a housing and a beam splitter prism mounted on the housing. One side of the beam splitter prism faces the object side, and the opposite side faces the target side. Beam expanders one and two are respectively arranged on opposite sides of the beam splitter prism. Beam expanders one and two are coaxially arranged, and their axes are perpendicular to the object-side incident axis of the beam splitter prism. A luminous reticle is located on the side of beam expander two away from the beam splitter prism. Beam expander one is a concave mirror, fixed inside the housing, used to expand the image of the luminous reticle so that it enters the beam splitter prism. Beam expander two is a plano-convex internal reflecting mirror, its flat end glued to the surface of the corresponding side of the beam splitter prism. The luminous reticle is mounted inside the housing via an adjustable mechanism. The housing has a channel for the image emitted by the luminous reticle to reach the beam splitter prism. The advantage of this invention is that it can effectively improve aiming accuracy.

This invention relates to a method and system for calibrating a rotating biprism, belonging to the field of rotating biprism technology. By calibrating the relationship between various orientations in a spatial rectangular coordinate system and iterating using the characteristics of the rotating biprism, this invention achieves accurate calibration of the prism deflection angle and zero position, avoids large errors in the calibration process, ensures the beam steering effect of the rotating biprism, and improves the pointing accuracy of the rotating biprism.