51 results about "Dove prism" patented technology

The disclosure discloses an OAM measurement device independent quantum key distribution system based on real-time tracking compensation and method thereof, which comprises a user side Alice, a user side Bob and a measuring unit; the user side Alice and the user side Bob realize real-time monitoring and phase distortion compensation of the channel environment by using strong pulse lasers from the measuring unit; the measuring unit utilizes an M-Z interferometer formed by a Dove prism to realize the separation of odd / even orbital angular momentum order photons, and measure Bell states of the photons with orbital angular momentum; the disclosure realizes OAM measurement device independent quantum key distribution system based on real-time tracking compensation, and the user uses the orbital angular momentum state for coding, thereby having the characteristics of good stability, high code rate and strong expansibility.

According to the large-depth-diameter-ratio micropore laser rotary-cutting precision machining system and method, light beam self-rotation and light beam scanning are achieved through a compact rotating assembly integrating a Dove prism and double reflectors, the off-axis angle and the off-axis amount are precisely regulated and controlled through deflection and movement of the reflectors, light beams are subjected to off-axis focusing through a focusing assembly, and the precision of laser rotary-cutting precision machining is achieved. Finally, a light path focusing mode of first converging and then off-axis focusing is formed, large-depth-diameter-ratio micropore machining is achieved, the aperture range is dozens of micrometers to several millimeters, and the maximum depth-diameter ratio can reach 15: 1 or above; the device is compact in structure, a complex adjusting system is not needed, the control mode is simple, high rotating speed can be achieved, ultra-short pulse time domain broadening is reduced through the double-reflector system, and machining of hole patterns such as steep straight holes and taper holes can be achieved.

The invention discloses an image rotation detection and image rotation elimination adjustment method applied to a laser communication optical system, belongs to the technical field of space laser communication, and solves the problem that the space layout compactness, link energy transmittance and the like of the laser communication system are influenced by adopting a traditional rotation elimination device such as a Dove prism and a K mirror. The positions and angles of the left side collimator and the right side collimator are respectively adjusted to realize coaxial and detection reference transmission; placing the detected laser communication system between the two collimators, and adjusting a rotary table pitch angle of the laser communication system to enable a telescope of the laser communication system to be respectively aligned with the two collimators; extracting and recording light spot centroid coordinates of laser emitted by the two light tubes focused on the area-array camera of the laser communication system; calculating to obtain an image rotation angle; and adjusting the angle of a plane mirror in the laser communication system and carrying out iterative detection until the image rotation angle is reduced to meet the design requirement, thereby completing the adjustment work of the image rotation of the pitch axis of the detected laser communication system.

The invention discloses a light field space alignment detection and correction system and method based on an optical interferometer, the inclination angles of a second beam splitter, a third beam splitter, a first plane mirror and a second plane mirror are the same, two light beams to be aligned and detected are emitted to the second beam splitter and are equally divided into two identical light beams by the second beam splitter, and the two identical light beams are emitted to the first plane mirror. One beam is reflected by the first plane mirror and then enters a third beam splitter, the other beam passes through the second plane mirror and a Dove prism which is horizontally arranged and then enters the third beam splitter, the two beams of light entering the third beam splitter are combined to obtain two different beams of light, one beam is in a symmetrical mode, and the intensity of the beam is detected through a photoelectric detector; the other beam is in an antisymmetric mode, and the intensity of the other beam is detected through a photoelectric detector. The device is simple in structure, the detection and correction process is greatly simplified, and targeted correction can be carried out according to the detection result.

The invention discloses a multi-channel optical fiber rotary connector, and belongs to the technical field of optical fiber communication and optical fiber sensing. Comprising a central rotating shaft of a hollow structure, a cylindrical Dove prism, a rotor assembly, a stator assembly and a transmission mechanism, the Dove prism is arranged in the central rotating shaft, and the cylindrical surface of the Dove prism and the inner wall of the central rotating shaft are bonded and fixed through low-expansion-coefficient glue; the rotor assembly and the stator assembly are arranged at the two ends of the central rotating shaft respectively, the transmission mechanism is arranged on the periphery of the central rotating shaft, and the rotor assembly, the stator assembly and the central rotating shaft are in linkage through the transmission mechanism. According to the high-density multi-channel optical fiber rotary connector disclosed by the invention, through precise optical design, high-stability transmission mechanism and low-expansion material matching, uninterrupted transmission of multiple paths of optical signals in a rotary state is realized.

The invention discloses a micro-displacement measurement system based on dual-wavelength medium metasurface conjugate vortex light interference, and relates to the technical field of optical displacement measurement, the micro-displacement measurement system comprises an optical coupler, a metasurface, an objective lens and a first beam splitter, the input end of the optical coupler is connected with a first laser and a second laser at the same time; two parts of light output by the first beam splitter are respectively input into a measuring arm and a reference arm, the measuring arm comprises a Dove prism, a second beam splitter, a measuring quarter-wave plate and a measuring reflector, the reference arm comprises a third beam splitter, a reference quarter-wave plate and a reference reflector, light reflected by the measuring reflector and the reference reflector is input into a fourth beam splitter, and light reflected by the fourth beam splitter is input into a fourth beam splitter. The fourth beam splitter combines the two beams of light and inputs the combined light to the CCD camera; and the computer processes the interference image to obtain the displacement of the to-be-measured object. Through the metasurface and dual-wavelength theory, the problems that a displacement measurement system is large in size and small in measuring range are solved at the same time.

The invention discloses a displacement measurement method and system based on orbital angular momentum light beam conjugate interference, and the method comprises the steps: enabling linearly polarized light emitted by a laser to pass through an optical attenuator, a light beam expander, a quarter-wave plate and a vortex wave plate to form a light beam with orbital angular momentum, and enabling the light beam to pass through a beam splitter to be divided into a reference light beam and a measurement light beam. A measurement light beam is vertically incident on a reflection grating, and the mth-order diffraction light is incident on a first cube-corner prism and is reflected back to a diffraction grating to be subjected to secondary diffraction. And after the reference beam passes through the second cube-corner prism, the topological charge symbol of the reference beam is changed by the Dove prism. The reference light beam and the measurement light beam generate conjugate interference at the beam splitter prism, a petal-shaped interference pattern collected by the CCD is demodulated, and in-plane and out-of-plane two-dimensional displacement of the grating is calculated. The system has the characteristics of simple and compact structure, strong anti-interference capability, high precision and the like, and can be widely applied to the fields of high-end equipment manufacturing, semiconductor industry, precision metering and the like.

The invention discloses a high-precision vortex light interference displacement sensor applied to a confined space, which comprises an edge emission laser chip, a micro-nano spiral phase plate, a Dove prism, a reflector, a cover plate, a photoelectric detector, a packaging substrate and the like, and adopts an optical-mechanical-electrical integrated structure design. Micro-nano spiral phase plates are arranged at the two ends of the laser emitting chip, left-side laser becomes a vortex light beam after passing through the micro-nano spiral phase plates, right-side laser becomes a vortex light beam conjugated with the left-side laser after passing through the micro-nano spiral phase plates and Dove prisms, and the conjugated vortex light beams on the left side and the right side enter a grating after passing through a reflector and a lens. After grating diffraction, diffraction beams of the conjugate vortex beams on the left side and the right side are converged and coherent, a vortex interference light field is received by a photoelectric detector, and then grating displacement is analyzed from a coherent light field. Miniaturization of the vortex light interference displacement sensor is achieved, and the vortex light interference displacement sensor is suitable for high-precision displacement measurement in limited space scenes in the fields of precision motion modules, precision instruments and the like.

The invention discloses an alignment sensing system of a multi-wavelength vortex light projection photoetching machine. The system is composed of n light sources which are arranged in parallel and have different wavelengths, vortex light generators corresponding to the light sources, a light beam combiner, a reflector, two amplitude gratings, a Dove prism, a quarter-wave plate, a half-wave plate, a polarization beam splitter and detectors corresponding to the light sources. The processed second diffracted light received by the detector interferes with the first diffracted light, and an interference image is formed at the detector. The structure is simple, and high-precision detection of the alignment mark position of the phase silicon wafer can be realized.

The invention relates to a photo-thermal detection device for non-invasive glucose detection, which comprises a quantum cascade laser, a DFB detection laser, an optical medium, a dove prism, a parabolic reflector, an optical chopper, an optical polarizer, a photoelectric detector, a lock-in amplifier, a data acquisition card and a computer, the invention innovatively provides a photo-thermal detection technology based on interference intensity demodulation. A miniaturized dove prism absorption cell structure is combined with an FPE (Fabry-Perot cavity), so that the absorption cell has better anti-vibration capability. According to the device, a non-invasive detection mode is adopted, the blood glucose concentration can be detected in real time without blood sampling, the pain of a patient is reduced, and the detection convenience and comfort are improved. The method has important significance on the development of biomedical detection.

The utility model discloses a Michelson interference high-precision optical micro-measurement device based on vortex filtering, which relates to the technical field of precision measurement, and sequentially comprises a light field modulation module, an optical field detection module, a Michelson interference detection module, a Michelson interference detection module and a Michelson interference detection module along an optical path, the interference measurement module comprises a beam splitter, a reflector and a Dove prism arranged in a reference light path, the Dove prism enables the topological charges of the vortex beam to be reversed, and the Dove prism and the vortex beam in the measurement light path form composite mode interference light; the frequency domain filtering module is used for performing frequency domain filtering purification on the interference light; and the signal acquisition module is used for acquiring interference light spot images. According to the utility model, topological charge inversion is realized through the Dove prism, nanoscale displacement is linearly converted into macroscopic angle rotation of an interference pattern, frequency domain purification is carried out in combination with frequency domain filtering, and the signal-to-noise ratio and the resolution are remarkably improved; the device is compact in structure, multi-stage amplification and purification of displacement signals are achieved through a pure optical means, and micro-displacement measurement with nanoscale precision can be achieved.

The invention relates to the technical field of laser processing, and discloses a complex curved surface laser rotary cutting self-adaptive drilling device and method.The complex curved surface laser rotary cutting self-adaptive drilling device comprises a base, a first rectangular prism and a second rectangular prism are fixed to the front side of a supporting plate through bolts, and a supporting cylinder is fixed to the front side of the supporting plate through bolts; supports are symmetrically fixed to the two inner walls of the supporting cylinder, a Dove prism rotary scanning mechanism is fixed between the two supports, and a self-adaptive adjusting control machining mechanism is fixed to the bottom of one support. According to the laser rotary-cut self-adaptive drilling device for the complex curved surface, through the efficient rotary scanning characteristic of the Dove prism, the machining mechanism is controlled through real-time monitoring and self-adaptive adjustment of the displacement detection unit, self-adaptive rotary-cut machining of the complex curved surface is achieved, the rotation speed of a laser beam is increased through rotation of the Dove prism, and the machining precision is improved. Compared with other methods, the punching efficiency is doubled, and the overall efficiency is greatly improved.

The utility model relates to the technical field of optical communication, in particular to a single-fiber bidirectional optical device, which comprises a receiving end optical assembly, a transmitting end optical assembly, an outer lens and an insertion core, the transmitting end optical assembly comprises a laser, a collimating lens, a Dove prism and a filter, and the receiving end optical assembly comprises a focusing lens and a detector; emitted light of the laser is collimated into first parallel light through the collimating lens, the first parallel light is emitted to the Dove prism, the first parallel light is reflected by the Dove prism and then refracted through the filter to obtain second parallel light, and the second parallel light is coupled through the outer lens to enter the ferrule; third parallel light obtained by the outer light source through the ferrule and the outer lens is deflected to the focusing lens through the filter plate and is converged into the detector through the focusing lens. According to the utility model, the Dove prism is used to adjust the height difference between the transmitting-end parallel light and the receiving-end parallel light, so that the two parallel light beams can coincide in space, and the receiving-end parallel light beams and the transmitting-end parallel light beams of the single-fiber bidirectional optical device can coincide in the presence of material and production process tolerances, thereby maximizing the coupling efficiency of the receiving-end and the transmitting-end.

The application provides a laser micro-processing system and method, wherein the laser micro-processing system comprises a laser, a beam expander, a half-wave plate, a one-dimensional AOD, a slit diaphragm, a dove prism, a 4f imaging system and a focusing lens for processing. The laser is used for emitting a laser beam; the beam expander is used for expanding and collimating the laser beam output by the laser; the half-wave plate is used for adjusting the polarization direction of incident light; the one-dimensional AOD is used for diffracting incident laser; the slit diaphragm is used for filtering out unnecessary diffracted light; the dove prism is used for controlling the rotation of the outgoing light; the 4f imaging system is used for imaging the light field distribution of the outgoing surface of the dove prism to the entrance pupil surface of the focusing lens for processing; and the focusing lens for processing is used for converging the laser beam into a focal spot to act on the processing surface of the sample. The laser micro-processing system and method solve the problems of complex structure, high control difficulty and low diffraction efficiency of the two-dimensional AOD system, and realize high-speed, high-precision and adjustable aperture processing of micro-holes.

The utility model discloses integral cavity greenhouse gas detection equipment capable of suppressing environmental noise, and belongs to the technical field of gas detection. The integrating cavity greenhouse gas detection equipment capable of suppressing environmental noise comprises a laser emission assembly and a light path adjustable input assembly arranged on an output light path of the laser emission assembly, the optical resonant cavity is arranged on an output light path of the light path adjustable input assembly; the information acquisition and processing assembly is arranged on an output light path of the optical resonant cavity; the light path adjustable input assembly comprises a first reflecting mirror, a second reflecting mirror, a Dove prism, off-axis parabolic mirror piezoelectric ceramics and a hollow roof prism reflecting mirror. According to the integral cavity greenhouse gas detection equipment capable of suppressing the environmental noise, reflected light is injected into the optical resonant cavity at a sufficient off-axis angle through the light path adjustable input assembly, so that the utilization rate of laser is greatly improved, sufficient off-axis of the off-axis optical resonant cavity is realized, and the problem of effectively suppressing the residual cavity mode noise is solved.

The invention provides a vortex light interference device and method, and relates to the technical field of optical systems.The device comprises a circular polarization generating unit, a first interference unit, a second interference unit, a vortex beam generating unit, a first Dove prism, a second Dove prism, a first CCD camera and a second CCD camera. The vortex beam generation unit is arranged at the two interference light paths of the first interference unit and converts the two interference light beams into vortex beams, the first Dove prism and the second Dove prism are arranged at the light paths of the first transmission light and the first reflection light respectively, and the first Dove prism and the second Dove prism relatively rotate by an angle of pi / 2, so that the vortex beams are generated. And the first CCD camera and the second CCD camera are respectively used for imaging the first emergent light and the second emergent light. According to the invention, visual demonstration of vortex light interference and multimode mixed vortex light orbital angular momentum separation can be realized.

The invention relates to the technical field of optical fiber communication, and discloses a high-reliability multi-channel optical fiber rotary connector which comprises a stator shell, a central rotating shaft and a rotor shell, a Dove prism is arranged in an inner cavity of the central rotating shaft, the outer surface of the Dove prism is a cylindrical surface, the cylindrical surface and an inner hole of the central rotating shaft are assembled in a small-gap mode, and the rotor shell is arranged in the inner cavity of the central rotating shaft. The gap is filled with glue with a low expansion coefficient to bond and fix the Dove prism and the central rotating shaft, and the central rotating shaft is made of a ceramic material with a low expansion coefficient; a stepped hole is formed in an inner cavity of the tail sleeve, the stepped hole is encapsulated by glue, and a tail cable penetrates out of the tail sleeve. According to the optical fiber rotary connector, the Dove prism and the collimator bonding plate are made of a low-expansion-coefficient material, and the optical fiber connector is processed in a dynamic sealing and tail sleeve glue potting sealing mode, so that the operation stability of the whole optical fiber rotary connector in a wide-temperature, high-humidity and high-vibration-impact environment can be realized.

The invention provides a Dove prism-based marking method for matching a laser spot and DOE, and aims at the requirements that the ellipticity of an actual light spot of a laser needs to be matched with the long and short edges of the DOE and a square light spot needs to be marked on the same edge, the Dove prism is rotated to adjust the direction of an incident laser elliptical light spot, so that the DOE is matched with the direction of the incident laser elliptical light spot. And the long and short edges are accurately aligned with the designed long and short edges of the installed DOE. Therefore, the square light spots with highly uniform output energy distribution of the DOE are ensured, the edges of the square light spots are ensured to be consistent with the scanning direction, and a foundation is laid for realizing high-precision common-edge connection marking. The problem that in the prior art, the long and short axis angles of a shaping light spot with high homogenization quality and a laser light spot for common-edge connection marking cannot be matched with the angle where the DOE optimal shaping effect is located is solved.

The utility model discloses a multi-channel hollow optical fiber slip ring, which comprises a stator end provided with a stator, a rotor end provided with a rotor and a combined Dove prism structure arranged in the rotor end, the rotor in the rotor end and the combined Dove prism structure coaxially rotate, and the rotor end is configured to rotate at a speed omega when the rotor rotates at the speed omega. The combined Dove prism structure rotates at a speed [omega] / 2. In the rotor, a first optical fiber channel is arranged on the outer side of an incident inclined plane close to the combined Dove prism structure, an incident optical fiber collimator is arranged in the first optical fiber channel, and two second optical fiber channels are arranged on the outer side of an emergent inclined plane close to the combined Dove prism structure in the stator and are arranged up and down. And receiving optical fiber collimators are arranged in the two second optical fiber channels. According to the utility model, a combined Dove prism structure is introduced, and the relative rotation position of the rotor and the incident end optical fiber collimator is considered, so that optical signals are continuously transmitted, and uninterrupted coupling between an input channel and an output channel of the optical signals is realized.

This invention relates to a coaxial adjustment device and method for a Dowell prism, comprising a prism mounting frame, an adjustment panel, a fixed mounting plate, and a rotary motor. The prism mounting frame has a locking cavity for engaging the Dowell prism. The adjustment panel is connected to the upper end of the prism mounting frame, and the adjustment panel has a light-emitting hole facing the locking cavity for light emission. The adjustment panel has multiple evenly distributed first through holes and first adjustment holes. A first connecting member passes through the first through hole and connects to the inner ring of the rotary motor. A first adjustment member passes through the first adjustment hole and abuts against the upper end of the prism mounting frame. The fixed mounting plate is connected to the outer ring of the rotary motor, and the fixed mounting plate also has a second adjustment hole. A second adjustment member passes through the second adjustment hole and abuts against the rotary motor. This invention not only facilitates the adjustment of the Dowell prism to the set requirements but also provides a simple and quick adjustment process.

The invention relates to a special-shaped four-cemented prism and a processing method thereof in the technical field of special optical part processing, the special-shaped four-cemented prism is of a ship-shaped structure as a whole and comprises a beam splitter prism A, a beam splitter prism B, a total reflection prism A and a total reflection prism B. The beam splitter prism A, the beam splitter prism B and the total reflection prism A are all isosceles right-angle prisms. A beam splitting film is plated on the chord plane of the beam splitting prism A in a vacuum mode, the total reflection prism B is a Dove prism, and the machining method comprises the steps of light blank manufacturing, beam splitting film vacuum plating, gluing and the like. The device is applied to transmission of spectral imaging information, one imaging spectrum can be divided into two imaging spectrums, the angle deviation of the two imaging spectrums is within 1 ', the inclination deviation between one imaging spectrum image and the other imaging spectrum image is within 5' after the imaging spectrum image rotates by 180 degrees, the spectral characteristics of the two imaging spectrums meet the requirement that the wavelength ranges from 0.4 micrometer to 0.7 micrometer, and the spectral characteristics of the two imaging spectrums meet the requirement that the wavelength ranges from 0.4 micrometer to 0.7 micrometer. And the transmissivity and the polarization effect deviation are both less than 5%.

The utility model relates to the technical field of optical fiber communication, and discloses a high-reliability multichannel optical fiber rotary connector, which comprises a stator shell, a central rotating shaft and a rotor shell, a Dove prism is arranged in an inner cavity of the central rotating shaft, and the outer surface of the Dove prism is a cylindrical surface. The cylindrical surface and an inner hole of the central rotating shaft are assembled in a small gap, the gap is filled with glue with a low expansion coefficient to adhere and fix the Dove prism and the central rotating shaft, and the central rotating shaft is made of a ceramic material with a low expansion coefficient; a stepped hole is formed in an inner cavity of the tail sleeve, the stepped hole is encapsulated by glue, and a tail cable penetrates out of the tail sleeve. According to the utility model, the Dove prism and the collimator bonding plate which are made of low expansion coefficient materials are adopted, and the optical fiber connector is processed by adopting a dynamic seal and tail sleeve glue potting sealing mode, so that the operation stability of the whole optical fiber rotary connector under the environment of wide temperature, high humidity and high vibration impact can be realized.

The application claims a photothermal detection device for non-invasive glucose detection, comprising a quantum cascade laser, a DFB detection laser, an optical medium, a dove prism, a parabolic mirror, an optical chopper, an optical polarizer, a photodetector, a lock-in amplifier, a data acquisition card and a computer, and innovatively proposes an interferometric intensity demodulation-based photothermal detection technology. The miniaturized dove prism absorption cell structure is combined with the FPE (Fabry-Perot cavity), so that it has better vibration resistance. The device adopts a non-invasive detection method, can detect the blood glucose concentration in real time without blood sampling, reduces the pain of patients, improves the convenience and comfort of detection, and has important significance for the development of biological medical detection.

The invention relates to the technical field of optical fiber communication, and discloses a miniature multichannel optical fiber rotary connector, which comprises a stator shell, a central rotating shaft and a rotor shell, and is characterized in that the rotor shell drives the central rotating shaft to rotate along the axis of the stator shell through a transmission mechanism, and the transmission ratio of the transmission mechanism is 2: 1; the end, close to the stator shell, of the center rotating shaft is fixedly connected with a prism adjusting base, a prism sleeve is installed in an inner cavity of the prism adjusting base in an extruding and suspending mode, the Dove prism is bonded to an inner cavity of the prism sleeve, and the optical axis of the Dove prism coincides with the axis of the center rotating shaft in an adjusting mode. The diameter of an inner hole, close to one end of the Dove prism, of the central rotating shaft is larger than the maximum diameter of the Dove prism. According to the invention, under the same shell size, a larger light transmission area can be obtained by adjusting the mounting position of the Dove prism; a dense optical fiber collimator array is obtained by adopting optical fiber collimators with small deflection angles, and dense multi-optical-path channel arrangement can be realized.

A line-field parallel swept optical coherence tomography (OCT) system optimized for high-resolution ophthalmic imaging and capable of broad industrial applications. The system employs a gain chip using gallium-aluminum-arsenide (GaAlAs) for light amplification within a specific “water window” wavelength range, suitable for deep tissue imaging. The design incorporates a hermetically sealed packaging with an optional thermoelectric cooler and utilizes a single angled facet (SAF) with high reflectivity and antireflective coatings to enhance laser performance. The optical path includes a collimating lens, a cat's eye focusing lens, and a bandpass filter adjustable via an angle control actuator for dynamic wavelength tuning. The system features a rotator-derotator mechanism utilizing Dove prisms or k-mirror devices, for example, for precise radial scanning. This allows for quick, accurate imaging, making it ideal for capturing high-resolution images of the retina and other surfaces.

The invention discloses a high-precision vortex grating interference displacement sensor and a working method thereof, the high-precision vortex grating interference displacement sensor comprises an edge emission laser chip, a micro-nano spiral phase plate, a Dove prism, a reflector, a cover plate, a photoelectric detector, a packaging substrate and the like, and the high-precision vortex grating interference displacement sensor is designed by adopting an optical-mechanical-electrical integrated structure. Micro-nano spiral phase plates are arranged at the two ends of the laser emitting chip, left-side laser becomes a vortex light beam after passing through the micro-nano spiral phase plates, right-side laser becomes a vortex light beam conjugated with the left-side laser after passing through the micro-nano spiral phase plates and Dove prisms, and the conjugated vortex light beams on the left side and the right side enter a grating after passing through a reflector and a lens. After grating diffraction, diffraction beams of the conjugate vortex beams on the left side and the right side are converged and coherent, a vortex interference light field is received by a photoelectric detector, and then grating displacement is analyzed from a coherent light field. Miniaturization of the vortex light interference displacement sensor is achieved, and the vortex light interference displacement sensor is suitable for high-precision displacement measurement in limited space scenes in the fields of precision motion modules, precision instruments and the like.

Systems and methods are provided for ultrafast light field tomography (LIFT), a transient imaging strategy that offers a temporal sequence of over 1000 and enables highly efficient light field acquisition, allowing snapshot acquisition of the complete two, three or four-dimensional space and time. The apparatus transforms targets in object space into parallel lines in the image plane with a cylindrical lens. Beam projections are optionally directed through a Dove prism and an array of cylindrical lenslets to an imaging device such as a SPAD camera, streak camera and CCD camera. By using an array of cylindrical lenslets oriented at distinct angles, enough projections are obtained simultaneously to recover the image with a single snapshot. The time-resolved system and methods were adapted to LIDAR, hyperspectral, non-line-of-sight, and three-dimensional transient imaging.

The present invention relates to a laser focus image plane rotator and a method for rotating a laser focus image plane, belonging to the technical field of semiconductor processing, and solves the problem that the traditional wafer cutting width cannot meet the requirements of high-precision processing. A laser focus image plane rotator includes a servo motor, a precision transmission device, a prism base, a Dove prism, a motion control card, and a motor driver. A control method for the laser focus image plane rotator specifically includes the following steps: presetting the motion parameters of the wafer carrier, generating the laser focus image plane rotation parameters, performing cutting with a laser cutter, and controlling the focus along the cutting trajectory. In the present invention, the Dove prism can cooperate with the motion trajectory of the wafer, and the minor axis of the elliptical light spot of the light focus is always perpendicular to the cutting direction, ensuring the cutting effect, meeting the high-precision processing requirements of wafer cutting, realizing real-time and continuous cutting work with different motion trajectories, reducing the production cost, and improving the processing precision and processing efficiency.

The present invention provides a vortex light interferometry device and method, relating to the field of optical system technology. The device includes a circularly polarized light generating unit, a first interferometry unit, a second interferometry unit, a vortex beam generating unit, a first dove prism, a second dove prism, a first CCD camera, and a second CCD camera. When demonstrating the separation of orbital angular momentum of multimode hybrid vortex light, the vortex beam generating unit is disposed at the two interferometry light paths of the first interferometry unit to convert both interferometry light beams into vortex beams. The first dove prism and the second dove prism are disposed at the light paths of the first transmitted light and the first reflected light, respectively, and the first dove prism and the second dove prism are rotated relative to each other by an angle of π / 2. The first CCD camera and the second CCD camera are used to image the first and second output lights, respectively. The present invention enables intuitive demonstration of vortex light interference and the separation of orbital angular momentum of multimode hybrid vortex light.

The utility model relates to a coaxial adjusting device of a Dove prism, which belongs to the field of optical machine installation and adjustment and comprises a Dove prism, a Dove prism installation cylinder, a Dove prism adjusting frame and a motor. The Dove prism adjusting frame comprises a first fixing ring and a first adjusting ring, the first fixing ring is coaxial with an output shaft of the motor, the first adjusting ring and the first fixing ring are fixedly connected through a first elastic element, and a first fine adjustment threaded rod is arranged between the first adjusting ring and the first fixing ring; one end of the Dove prism installation cylinder is fixedly connected with the first adjusting ring, an installation through groove is formed in the Dove prism installation cylinder, and the Dove prism is fixedly arranged in the installation through groove. The device has the advantages that the direction of the optical axis of the Dove prism is adjusted through the Dove prism adjusting frame, hole edge rotating imaging is carried out through the motor, images obtained at the collection hole edge have the advantages of being consistent in detection area and overlapping area, small in proportion and the like, meanwhile, the imaging quality is not affected, and the optical detection efficiency is greatly improved.