14 results about "Dove prism" patented technology

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 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 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 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.

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.

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 application belongs to the technical field of optical fiber rotary connectors, and discloses a super-multi-path optical fiber rotary connector, wherein optical fiber collimators are arranged on input end fixed end covers and output end fixed end covers in a same layer interval type concave-convex staggered form and / or an inner-outer layered form, on the basis of not changing a light aperture d of a dove prism, a fiber collimator adjusting hole d1 and a fiber collimator mounting hole d2, as many paths as possible are increased, the fiber collimator adjusting hole has no intersection, and interference can be avoided, the number of paths is increased through different fixed end cover designs, different arrangements correspond to different adjusting sequences, super-multi-path optical fiber rotary connector design is realized, and the problem of large data transmission in an optical fiber communication system is solved.

The present application relates to a kind of dual-optical arm dynamic single-pixel imaging system and method based on Radon spectrum, the imaging system includes beam splitter, dove prism, plano-convex cylindrical lens, spatial light modulator, single-pixel detector and imaging lens.One optical path in dual-optical arm single-pixel imaging system is used for positioning, and the other optical path is used for single-pixel imaging.Positioning light path is completed by optical element dove prism, plano-convex cylindrical lens and linear array detector for fast positioning, and imaging light path is compensated according to the positioning result to complete the reconstruction of moving target for modulated speckle of light field.Adopting the imaging system and method can avoid the problem of increasing sampling rate caused by traditional positioning method, and also can avoid the problem that positioning speckle is vulnerable to noise, provides an effective way for moving single-pixel imaging.

Provided is a laser machining device that can facilitate minute control on an incident angle of a laser beam on a dove prism. This laser turning device for turning an incident laser beam comprises: a first wedge prism that deflects the incident laser beam with respect to the optical axis thereof; a dove prism that causes the laser beam having transmitted through the first wedge prism to rotate about the optical axis thereof; a first wedge prism rotating mechanism that causes the first wedge prism to rotate about the optical axis; and a dove prism rotating mechanism that causes the dove prism to rotate about the optical axis.

The application belongs to the technical field of ultrafast optics and light field regulation, and provides a digital adjustable off-axis pumping laser system, which comprises a digital off-axis pumping module with sequentially connected pumping source, collimating lens, spatial light modulator and first focusing lens, astigmatic resonant cavity with sequentially connected input coupling mirror, gain medium, concave mirror and output coupling mirror, and mode conversion module with sequentially connected plane mirror, dove prism, second focusing lens and cylindrical lens pair. The application realizes order of magnitude improvement in the regulation accuracy of off-axis pumping by integrating the spatial light modulator to digitally modulate the pumping light in the off-axis pumping laser system. Meanwhile, through programmable control of the spatial light modulator, combined with efficient excitation of two-dimensional high-order Hermite-Gaussian mode by the astigmatic resonant cavity and the astigmatic transformation function of the mode conversion module, high-order structured light beams covering the entire Hermite-Laguerre-Gaussian mode space can be conveniently generated.

The application discloses a kind of three-dimensional optical waveguide laser direct writing system and method, the system includes laser, beam expander, rotating motor, slit, focusing lens, motion platform and control system successively arranged along optical path;The light beam incident end of slit is installed with dove prism, rotating motor drives dove prism and slit without relative motion Synchronous rotation;Laser beam is refracted after dove prism with 2ω angular velocity rotation, then penetrates the slit of synchronous rotation and forms high-speed rotating elliptical light spot, forms time average, space isotropic equivalent spherical focus in sample after focusing lens focusing.This application converts dynamic elliptical light spot into equivalent spherical focus by the synchronous linkage of dove prism and rotating slit, eliminates the dependence of traditional direct writing technology on scanning direction, realizes the direct writing processing of high roundness three-dimensional optical waveguide in any scanning direction, and can further improve light field quality and processing precision by adding 4f imaging system.

The utility model discloses a laser annealing device and laser annealing equipment, and relates to the technical field of laser annealing, the laser annealing device comprises a laser, a beam expanding module, a light equalizing module and a focusing module, the laser is used for outputting laser beams; the beam expanding module is used for expanding the laser beams; the light homogenizing module comprises a DOE homogenizing mirror and a Dove prism, the DOE homogenizing mirror is used for homogenizing the laser beams output by the beam expanding module, and the Dove prism is used for rotating light spots of the laser beams output by the DOE homogenizing mirror; the focusing module is used for focusing light spots of the laser beams output by the Dove prism. The utility model aims to ensure that the heating time of each area on the surface of a material is equalized, so that the problem of overheating or underheating caused by local energy accumulation is effectively reduced.

The application discloses a kind of multi-beam parallel processing system and processing method, the application is accurately controlled focal point z direction distribution by controlling the inclination of lens one and optical axis vertical surface, realize focal point array and spherical surface, free curve trajectory normal fitting, processing surface smooth no step, focal point array rotates in real time along with trajectory normal, projection spacing is consistent, energy density is stable, curve edge quality is greatly improved;Compared with the prior art, only by rotating multi-beam generator and lens one and the angle adjustment of lens one realizes focal point array regulation and control, saves whole machine rotation, complex structure such as dove prism, K-mirror, easy to operate and lower cost.

The utility model relates to the technical field of laser processing, and discloses a complex curved surface laser rotary cutting self-adaptive drilling device which comprises a base, a first right-angle prism and a second right-angle prism are fixed on the front side of a supporting plate through bolts, a supporting cylinder is fixed on the front side of the supporting plate through bolts, and the first right-angle prism and the second right-angle prism are fixed on the base 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.