99 results about "Dove prism" patented technology

A method and apparatus for producing with a gas discharge laser an output laser beam comprising output laser light pulses, for delivery as a light source to a utilizing tool is disclosed which may comprise a beam path and a beam homogenizer in the beam path. The beam homogenizer may comprise at least one beam image inverter or spatial rotator, which may comprise a spatial coherency cell position shifter. The homogenizer may comprise a delay path which is longer than, but approximately the same delay as the temporal coherence length of the source beam. The homogenizer may comprise a pair of conjoined dove prisms having a partially reflective coating at the conjoined surfaces of each, a right triangle prism comprising a hypotenuse face facing the source beam and fully reflective adjoining side faces or an isosceles triangle prism having a face facing the source beam and fully reflective adjoining side faces or combinations of these, which may serve as a source beam multiple alternating inverted image creating mechanism. The beam path may be part of a bandwidth measuring the bandwidths of an output laser beam comprising output laser light in the range of below 500 femtometers at accuracies within tens of femtometers. The homogenizer may comprise a rotating diffuser which may be a ground glass diffuser which may also be etched. The wavemeter may also comprise a collimator in the beam path collimating the diffused light; a confocal etalon creating an output based upon the collimated light entering the confocal etalon; and a detector detecting the output of the confocal etalon and may also comprise a scanning mechanism scanning the angle of incidence of the collimated light entering the confocal etalon which may scan the collimated light across the confocal etalon or scan the etalon across the collimated light, and may comprise an acousto-optical scanner. The confocal etalon may have a free spectral range approximately equal to the E95 width of the beam being measured. The detector may comprise a photomultiplier detecting an intensity pattern of the output of the confocal etalon.

The invention provides a laser processing device and a method of the laser processing device. The laser processing device comprises a laser, a lens set, a Dove prism, a plane mirror, a focus lens and a workpiece to be processed which are all sequentially arranged in the direction of an optical axis, wherein the lens set is composed of two lenses, and the distance between the two lenses can be adjusted so that the spot sizes and the divergence angles of outgoing beams of the laser can be adjusted; the Dove lens is installed in a rotary motor and rotates with the optical axis as the center, and the beams going out from the Dove lens also rotate with the optical axis as the center; the plane mirror is used for deflecting the transmission direction of the beams; the position of the focus lens in the beam transmission direction can be adjusted, and the beams are focused on the surface of the workpiece to be processed after passing through the focus lens; the workpiece to be processed is placed on an electric displacement platform and can make two-dimensional movement in the plane perpendicular to the transmission direction of the beams.

A projection system used in a liquid crystal display (LCD) system is provided. The projection system has a light source, a polarization set which further includes a double dove prism, a vertical prism and a half-wave plate, a polarization beam splitter (PBS), a dichroic prism, and a projection lens. The light source emits a white light, which enters the polarization set and is split into a P-state polarized blue light and a mixed light. The mixed light includes an S-state polarized red light and an S-state polarized green light. The PBS allows the P-state polarized blue light to transmit and enter onto a blue light LCD panel, and deflects the mixed light by 90°. The dichroic prism splits the S-state polarized red light and the S-state polarized green light of the mixed light, which respectively enter a red light LCD panel and a green light LCD panel. The projection lens collects light from the red, green, blue LCD panels and project the lights onto a screen.

The invention discloses a hybrid solid-state multiline optical scanning and distance measuring device. The characteristics lie in that the device comprises an emission light source, a reflecting mirror, a Dove prism, a light receiving module and a signal processing unit, wherein the emission light source is used for emit infrared detection light; the reflecting mirror reflects the infrared detection light emitted by the emission light source and reflects infrared detection light reflected by a detected object or barrier; the Dove prism is located between the reflecting mirror and the light receiving module, and the angular velocity of rotation of the Dove prism is half of the angular velocity of rotation of the reflecting mirror; the light receiving module receives the infrared detection light emitted by the Dove prism, and a photoelectric sensor in the light receiving module converts optical signals into electric signals; and the signal processing unit is connected with the photoelectric sensor, and calculates the distance according to the electric signals converted by the photoelectric sensor. According to the invention, the Dove prism structure is additionally arranged so as to correct a problem of image rotation brought about by rotation, thereby realizing multiline distance measuring.

The invention discloses a generation system and a generation method for a spinning-orbital angular momentum hybrid entangled state. The system consists of a single photon source, a spinning-orbital angular momentum conversion unit, a spinning-orbital angular momentum hybrid entangled state separation unit and a feedback compensation unit, wherein the spinning-orbital angular momentum hybrid entangled state separation unit obtains spinning-orbital angular momentum hybrid entangled state photons through a polarization beam splitter, a polarization controller and a Q-plate phase plate; the separation unit realizes separation of horizontal polarization single photons from the spinning-orbital angular momentum hybrid entangled state photons through two beam splitters, two full reflectors and two dove prisms; the feedback compensation unit feeds back and transmits non-converted horizontal polarization light to the spinning-orbital angular momentum conversion unit for further conversion. The generation system disclosed by the invention realizes high-efficiency conversion of a high-purity spinning-orbital angular momentum hybrid entangled state, so that the system cost and the communication error rate are reduced, and the security of the system is enhanced.

The invention provides a method and device for realizing the demodulation of the orbit angular momentum state of the mixing auger phase light beam containing a plurality of orbit angular momentum states. the device comprises four 50/50 beam splitters, two 45 DEG total reflectors, two Dove prisms, two diffraction grids, two convex lenses, two CCD detectors and two energy meters. in the invention, the separation of the different angular-momentum quantum number helical light is realized, the measuring of each helical component energy in the light beam is realized, the measuring of the orbit angular momentum state containing the helical component in the light beam is realized. in the invention, the Mach-Zehnder interferometer having two arms with Dove prism is adopted for separating the helical component of different angular-momentum quantum number in the light beam, the beam splitter and the energy meter is used for measuring the energy distribution condition of each helical component in the light beam, and the diffraction grid is used for demarcating the separated orbit angular momentum state of the helical component. the invention can be widely used in the light orbit angular momentum information storing and transmitting field.

The invention provides a beam forming device and method. The beam forming device is formed by arranging a laser device, a pair of lenses, a Dove prism, a plane mirror, a regular axicon and a focusing lens in sequence in the direction of an optical axis. The distance between the lenses is adjustable so that the spot size and divergence angle of outgoing beams of the laser device can be adjusted. The Dove prism is installed in a hollow shaft rotary motor and rotates with the optical axis serving as the center, and the outgoing beams from the Dove prism also rotate with the Dove prism. The plane mirror is used for deflecting the transmission direction of the beams. The position of the focusing lens in the transmission direction of the beams is adjustable, and the outgoing beams are a bunch of rotary hollow annular beams after passing through the focusing lens.

The invention provides a portable gas monitor for monitoring volatile organic compounds by using differential optical absorption spectroscopy, comprising a heating sampling probe, a heating sample conveyer, a heating detecting gas chamber, a light source, a spectrometer, a GPRS (general packet radio service) positioning and data transmission unit, a flow metering and exhausting device, and a computer control system; the heating sample conveyer is connected with the heating sampling probe and the heating detecting gas chamber; light from the light source enters the heating detecting gas chamber and is reflected by a DOVE prism to enter the spectrometer; a mass flow meter of the flow metering and exhausting device is connected with an exhaust nozzle of the heating detecting gas chamber, and flow and on-off of a sampling pump are automatically controlled by the computer control unit; the computer control system uses received data to calculate characteristic signals of gas absorption by using differential difference technique to obtain gas concentration; the accuracy and sensitivity of detection results can be improved through DOVE prism reflection, gas concentration correction and differential difference technique.

The invention relates to a device of realizing the interference photolithography of a maskless surface plasma body through a laue mirror. The device comprises a precision turntable capable of adjusting the incident light angle, a rectangular dove prism capable of coupling and exciting the surface plasma body interference, a compressing device capable of compressing a substrate and the rectangular dove prism, and a support capable of fixing the compressing device. One side face of the rectangular dove prism is fixed on the precision turntable; a P polarized laser beam reaches the inclined plane in a mode of vertical incidence; and the precision turntable is adjusted finely to determine the real resonance angle for exciting the surface plasma body. The substrate coated with photoresist is arranged on the bottom surface of the prism; and the compressing device is adjusted so as to compress the prism and the substrate. A wide beam reaches the prism in a mode of incidence with the real resonance angle; and the surface plasma body interference and the exposure of the photoresist can be realized on the lower surface of a metal membrane; and the substrate after exposure is taken off. The surface plasma body interference photolithography is realized after the postbaking and development of the photoresist. The device has the advantages of low cost, high working efficiency, a great area of a processed pattern region, convenient assembly and adjustment, and the like. The device also facilitates the study and application of nanometer photon crystals and artificial materials.

The invention discloses a rapidly established terahertz attenuation total reflection system based on Dove prism, and belongs to the technical field of optical tests. The system comprises the following components arranged in sequence: a femtosecond laser, a beam splitter, a terahertz generator, a prism, a terahertz receiver and a signal processing system. The prism is a dove prism, whose axial section is in an isosceles trapezoid shape. The dove prism is made of a silicon material with high resistance and a high refractive index, and a reflector is arranged between the beam splitter and the terahertz receiver. By adopting a dove prism with an isosceles trapezoidal axial section, an attenuation total reflection system for detecting the terahertz spectrum of a sample can be established rapidly by parallelly arranging the prism in the optical path, the prism is not needed to be braced by a prism support, the overall optical path is not needed to be adjusted, the establishing time and material consumption are greatly reduced, at the same time, the prism surface can completely cover evanescent waves, the using amount of tested sample is obviously reduced, and thus the using cost is reduced.

According to one embodiment, an optical rotary joint comprises a first collimator arrangement for coupling-on first light-waveguides, and a second collimator arrangement for coupling-on second light-waveguides, with the latter being rotatably supported relative to the first collimator arrangement about a rotation axis. A Dove prism is provided between the first and second collimator arrangements as a derotating element. The first and second collimator arrangements have at least one micro-lens array on which light-waveguides with associated ferrules are disposed. In order to avoid tensile forces from arising in the arrangement, or as a result of individual ferrules becoming interconnected by an applied adhesive, trenches, barriers, or also coatings are provided between the individual ferrules.

The invention provides a structured light lighting device and a method of producing striped structured light. The structured light lighting device includes a laser, a half-wave plate, a condenser lens, a beam splitter, a reflector, an optical length delay module, and a Dove prism and a half-wave plate which are rotationally arranged in an optical path. Linearly polarized light emitted by the laser passes through the half-wave plate and the condenser lens in sequence, and is then split by the beam splitter into a reflected beam and a transmitted beam. The reflected beam enters the optical length delay module. The transmitted beam is reflected by the reflector to the optical length delay module. After the reflected beam and the transmitted beam pass through the optical length delay module, two lighting beams with the same optical length are formed. After the two lighting beams pass through the Dove prism and the half-wave plate, two spots are generated in a plane P1. A method of producing striped structured light is further provided. With the structured light lighting device adopted, problems such as low energy utilization rate, small lighting field of view and difficult polarization modulation in the prior art are solved.

The invention relates to an inclined slab laser amplifier, which consists of a first stage amplifier, a second stage amplifier, a Dove prism, a first reflecting mirror and a second reflecting mirror; laser crystal slab strips of the first stage amplifier and the second stage amplifier are inclined laser crystal slab strips; each laser crystal slab strip comprises two end faces and four sides which are respectively called an end face A, an end face B, a pumping surface C, a pumping surface D, and two opposite cooling surfaces which are mutually parallel; and a minute angle is formed between the pumping surface C and the pumping surface D. The inclined slab laser amplifier effectively inhibits parasitic oscillation and improves laser efficiency; and the Dove prism effectively eliminates the optical beam gain and asymmetry of a thermal lens caused by thermal effect.

The invention belongs to the field of adaptive optics, relates to a liquid-crystal adaptive optical imaging system for an atmospheric channel, and discloses a liquid-crystal adaptive optical system with compact structure and high sensitivity for realizing energy optimization and distribution of a detection branch and a correction imaging branch. The liquid-crystal adaptive optical system consistsof a wavefront detection branch, a correction imaging branch, a third reflecting lens and a Dove prism. Through introducing and optically combing the Dove prism with a fixed reflecting lens, a rotatable reflecting lens and a dichroic mirror, the switching between an adaptive imaging optical path and a liquid-crystal corrector response measuring optical path is realized, so that the aligning precision of the optical paths is not affected, the problem that in two processes of wavefront detection and corrector response matrix measurement, the section of an optical beam entering a Hartmann wavefront detector turns over is solved, and the reading sequences of detection data and corrector response measuring data are consistent; and the butt joint of the response matrix measuring optical path and the wavefront detection is finished by the dichroic mirror, so that the optical design of the detection branch is simplified.

The invention provides a spiral scanning laser machining device and method, and aims to solve the problems that an existing laser machining device is low in micropore taper adjusting precision, smallin machining hole diameter and low in machining efficiency. The spiral scanning laser machining device comprises a displacement reflector, a Dove prism, an upper deflection optical wedge, a lower deflection optical wedge and a focus lens which are sequentially arranged along an optical path, wherein the upper deflection optical wedge and the lower deflection optical wedge are arranged back to back; the central axes of the upper deflection optical wedge and the lower deflection optical wedge are coaxial with the central axis of the Dove prism; and laser beams are incident to the Dove prism after micropore taper adjustment is realized through the displacement reflector, the Dove prism increases the scanning speed of the laser beams and then enables the laser beams to enter the upper deflection optical wedge and the lower deflection optical wedge, the upper deflection optical wedge and the lower deflection optical wedge deflect the laser beams to achieve scanning of the laser beams with different diameters, and the focus lens focuses the laser beams, so that spiral scanning machining of micropores is achieved. According to the device and method, the machining precision and the machining efficiency of the laser machining device during micropore machining are improved.

The invention discloses a Dove prism mounting and adjusting method for a fiber optic rotary joint. The method comprises the following steps of 1), determining a reference optical axis; 2), fixing the Dove prism; 3), performing position adjustment on an axial surface in the Dove prism; and 4), performing prism sleeve fixation and performance testing. According to the Dove prism mounting and adjusting method, through continuously adjustment, inclination error and off-axis error of the Dove prism after mounting are reduced, so that the middle axial surface of the Dove prism is superposed with a mechanical rotating shaft of the fiber optic rotary joint, thereby reducing coupling loss between an incident fiber collimator and a receiving fiber collimator.

The invention relates to a panoramic sight system for a turning shoot gun. The sight system comprises a viewing optical system with a red spot sighting telescope, a differential mechanism and a white light imaging system; a platform operating mechanism of the sight system is fixedly connected with a weapon fighting mechanism of the sight system through upper and lower rotating shafts, and the rotating shafts are driven by an electric corner actuating mechanism; weapons such as guns and the like are fixed on a fixing bracket of the weapon fighting mechanism, and a gun firing mechanism steel cable in the bracket is controlled by the platform operating mechanism combined with a trigger and is provided with firing insurance; and an image/video and audio wireless transmitter, a tactical laser and a tactical light can be installed on a tactical guide rail on the weapon fighting mechanism. The system provided by the invention is improved on the basis of the traditional gun turning aimed fire tactical operating platform; because a Dove prism and a red spot sighting telescope are additionally provided, the pointing accuracy of the optical system is increased; and because a free rotating target is additionally provided, the man-machine relationship is more reasonable, and the platform is more applicable. Thus, the system provided by the invention has obvious economic benefits.

The invention discloses a miniaturized multipath optical fiber rotary connector, which comprises a core part, wherein the core part comprises a rotary end wire outlet assembly, a fixed end wire outletassembly, a transmission mechanism and a prism assembly, wherein the rotary end wire outlet assembly and the fixed end wire outlet assembly are installed at the two ends of the transmission mechanismrespectively; the transmission mechanism comprises an inner shaft; and the prism assembly is installed in the inner shaft of the transmission mechanism. The prism assembly comprises a special-shapedDove prism and a prism sleeve, wherein the special-shaped Dove prism is installed in the prism sleeve. The special-shaped Dove prism comprises an incident surface and an emergent surface which are opposite to each other at the two sides; extension lines of the incident surface and the emergent surface form an included angle of 90 degrees; the bottom between the incident surface and the emergent surface is a horizontal refracting surface; the upper side of the refracting surface is a cylindrical non-working surface; the incident surface and the emergent surface of light at the two sides are working surfaces; and the light enters from the incident surface at one side and exits from the emergent surface at the other opposite side after being refracted by the refracting surface at the bottom;and the cylindrical non-working surface of the special-shaped Dove prism, the prism sleeve and the inner shaft are coaxial.

The invention discloses a method for optical image despun through using an isosceles prism. The method includes the following steps that: the first waist surface of the isosceles prism is irradiated with an incident light beam, the optical axis of the incident light beam being parallel to the bottom surface of the isosceles prism; the isosceles prism rotates the light beam irradiated onto the first waist surface by 180 degrees, so as to obtain a rotated light beam, and the optical axis of the rotated light beam being parallel to the optical axis of the incident light beam; and the rotated light beam is irradiated to an imaging optical system. According to the method of the invention, the isosceles prism is adopted to rotate the incident beam irradiated onto the first waist surface by 180 degrees so as to obtain the rotated beam; the rotated beam is irradiated onto the imaging optical system, so that a stable and non-rotated image can be obtained, and optical image despun is realized; and the isosceles prism has the advantages of small size, light weight, capacity of compressing an optical path, simple processing and adjustment process and the like, and therefore, the problems of large size and difficult processing and adjustment of a K-mirror, the problems of large size and large weight of a Dove prism and the problem of the unsuitability of a Pechan prism for a parallel optical path in existing optical image despun methods can be solved.

The invention relates to a method and a system for parallelizing an axis of a reflecting surface and a rotation axis of a Dove prism, wherein the system comprises a lathe, a Dove prism component, a emission source centering instrument and a receiving source centering instrument; wherein the Dove prism component is arranged on the lathe; the emission source centering instrument, the Dove prism emission source and the receiving source centering instrument are sequentially arranged on the same optical path; and the Dove prism component comprises a Dove prism and an excircle for fixing the Dove prism. According to the method and the system for parallelizing the axis of the reflecting surface and the rotation axis of the Dove prism, the central axis of the excircle of the Dove prism is coaxial with the rotation axis of the lathe, thereby ensuring that the optical axis of the Dove prism is parallel to the central axis of the excircle of the Dove prism, the assembling precision can be effectively increased to 0.01mm, and the assembling cycle can be greatly shortened; and the system is simple in structure and good in operability.