174 results about "Optical engineering" patented technology

Means to use and combine methods of thermal engineering, plasmonics, photonics, electronics, photovoltaics, optical transfer, heat transport, light transport, catalysis and chemical reactions individually or in any combination for the enhancement or generation of solar, optical, electrical or any form of energy. The present disclosure further concerns a means to use at least a form of electromagnetic excitation or light-matter interactions in a structure or material having one or more addressable frequencies to generate the exchange of thermal, kinetic, electronic or photonic energy. The present disclosure further concerns a means to use at least a form of electromagnetic excitation or light-matter interaction, including solar or laser energy to generate localized conditions that enable initiation and spatial and temporal control of catalysis, chemical reactions, deposition, growth, synthesis, photocatalysis, photosynthesis, chemical catalysis, photochemical catalysis, photovoltaic, electrocatalysis and catalytic processes.

The invention belongs to the technical field of precision measurement and the field of optical engineering, and particularly relates to an auto-collimation three-dimensional angle measuring device andmethod based on polarizing beam splitting. The device is composed of a light source, a polarizer, a beam splitter, a polarizing beam splitter, image sensors, a collimating mirror, a fixed plane mirror and a cooperative target. According to the method, a measuring beam is divided into two mutually perpendicular measuring light by the cooperative target, the measuring light returns after being reflected by the fixed plane mirror and the cooperative target, and corresponding images are separately formed on the image sensors; and the positions of the two images are adopted to calculate a pitch angle, a yaw angle and a roll angle of the cooperative target with respect to an optical axis, so that a capability of detecting a three-dimensional corner of the measured object space. Since the principle of optical lever amplification is adopted to the roll angle and is consistent with the measurement principle of the pitch angle and the yaw angle, therefore, the technical advantages of high precision and large working distance for the three-dimensional angle measurement are achieved, and the advantage that the measurement accuracy is increased under the same working distance or the working distance is increased under the same measurement precision is achieved; two measuring light spots are received by two image sensors, the requirements for the subsequent image processing technique is reduced, and the frequency response of the measuring device is improved; and in addition, the designed cooperative target has the technical advantages of simple structure and low production cost.

The invention belongs to the technical field of precision measurement and the field of optical engineering and specifically relates to a combination zeroing laser large working distance auto-collimation device and method. The device consists of a light source, a collimating mirror, a reflecting mirror and a feedback imaging system; according to the method, via adjustment of the reflecting mirror, a reflected light beam is enabled to return to a center of an image plane of the feedback imaging system; an angular deflection measurement device on the reflecting mirror is used for obtaining angular variation of a surface of an object being tested. Because the reflecting mirror is added in a traditional auto-collimation angle measurement system, a problem that measurement cannot be realized when light reflected by the object being tested is deviated from a measurement system can be prevented; an auto-collimation working scope can be expanded while working distance remains the same or working distance is increased while the auto-collimation working scope remains the same; via specific design of the collimating mirror, the feedback imaging system, the reflecting mirror and the like, the combination zeroing laser large working distance auto-collimation device is enabled to be simple in structure and low in manufacture cost; measurement operation can be conducted even in unstable measurement environments, and a technical advantage of rapid measurement can be gained.

The invention relates to the technical fields of optical engineering, optical fiber optics and signal processing, particularly to a distributed type vibration sensing system and application thereof. According to the distributed type vibration sensing system, a multi-core optical fiber serves as a sensing optical fiber, in which a plurality of parallel sensing fiber cores are connected in an end-to-end mode and distributed in parallel under the support of a fiber framework, and the number of the fiber cores is 2-8. Through consistency of vibrating signals of a single fiber with multiple core, namely, consistency of the vibrating position and signal of every core, the distributed type vibration sensing system processes received signals to detect optical fiber vibrating signals generation due to vibration of wheel tracks and further to obtain and enhance wheel track vibration related time-frequency domain information. Therefore, the distributed type vibration sensing system achieves superposition treatment of vibration signals received from the same or neighboring positions, ensures no adding of system scheme hardware composition and system cost, greatly improve the system signal-to-noise ratio and enhances the sensitivity of wheel track vibration relation detection to obtain and enhance the wheel track vibration related time-frequency domain information.

The invention discloses a space micro-gripper based on compliant mechanisms. The space micro-gripper comprises plane gripping branch chains with a symmetric structure and microprobes. Five pairs of symmetric circular flexible hinges are adopted in the gripping branch chains to achieve two stages of amplification of input displacement of the space micro-gripper, wherein three pairs of flexible hinges are symmetrically distributed on the two sides to achieve the first stage of amplification of input displacement, and the other two pairs of flexible hinges are used for achieving the second stage of amplification. A clamping groove structure is adopted for perpendicularly and symmetrically assembling the two gripping branch chains in a cross form, the two gripping branch chains are connected together in the manner of nesting an upper groove and a lower groove so that the drive positions of the two gripping branch chains can be the same, and the two gripping branch chains are driven by one driver at the same time. Four gripping arms of the two gripping branch chains are each provided with one corresponding microprobe, the microprobes are sleeved with the gripping branch chains in a threaded connection manner so that the elongation of the microprobes can be adjusted, and adjustability of the size of a gripping opening is achieved. The four microprobes are symmetrically arranged to form the square space gripping opening, and when gripped objects are in four-point contact, objects in irregular shapes can be gripped. The designed space micro-gripper can be used for the fields of bioengineering, micro electro mechanical systems, nanoscale science and technology, optical engineering and the like.

The invention discloses an optical fiber light trap acceleration measurement device, belonging to the fields of inertia measurement technology and optical engineering. Four optical elements in the measurement device are arranged in a cross groove of an optical fiber fixing substrate respectively; transparent solution is capsulated in the crossing position of the cross groove; the output end face of the optical element is aligned with spherical particles in the transparent solution, the distance between output end faces of two opposite optical elements is between 50 and 800 microns; output ends of four monomode optical fibers are coupled in corresponding optical elements respectively, while input ends thereof are connected with a light intensity modulator; light emitted by a laser is modulated into four beams of light with the same light intensity through the light intensity modulator, and the four beams of light are input into the four monomode optical fibers respectively; an photoelectric image detector is arranged right above the cross position of the cross groove; and the photoelectric image detector and the light intensity modulator are respectively connected with a processor. The device has the advantages of even light intensity distribution and small radial gradient force, has high measurement sensitivity, and reduces the requirement on alignment accuracy of the beam.

The invention relates to a method and a device for measuring frequency stability of a femtosecond laser frequency comb, and belongs to the field of physics and optical engineering and the technical field of metrology testing. The device is simple in structure, low in cost and easy to implement, and influence caused by frequency stability of an atomic clock is offset in such a manner that the femtosecond laser frequency comb, a time frequency counter, a frequency synthesizer and the like share the reference frequency of the same atomic clock, so that the repetition frequency, the deviation frequency and frequency stability measuring results of the femtosecond laser frequency comb without the stability influence of the atomic clock are obtained.

The invention provides a support device for an optical lens and relates to the technical field of the manufacture, installation and adjustment of the optical lens. The device comprises a lens framework, a hollow bolt, an adhesive, an optical lens pressing block and a connection bolt. The optical lens is arranged in the lens framework; the radial position of the optical lens in the lens framework is adjusted by the hollow bolt; the axial location is realized through the optical lens pressing block and the connection bolt; and the radical location is realized by injecting adhesive in from an adhesive injecting hole in the hollow bolt. The support structure provided by the invention is simple and easy to process and manufacture, can effectively guarantee the location precision and the surface type precision of the optical lens and is convenient for the disassembly of the optical lens. The support device of the optics lens can be widely applied to optical engineering and optical experimental devices and has strong practical applicability.

The invention discloses a double-spectrum noninvasive blood glucose detection device, belongs to the field of optical engineering and novel medical detection instruments, and particularly relates to human body noninvasive blood glucose detection. The double-spectrum noninvasive blood glucose detection device is composed of a radiation light source, an optical integrating sphere, a measurement hole, bandpass filters, photoelectric sensors, a signal processing circuit and the like. By adoption of the double-spectrum noninvasive blood glucose detection device, a noninvasive glucometer which can operate within the spectrum range from the near-infrared spectrum (about 1 [mu]m) to the terahertz spectrum (about 100 [mu]m) can be established. According to the double-spectrum noninvasive blood glucose detection device, a light beam emitted by the light source is guided into the optical integrating sphere, the fingertip of a human body is fixed to a specific position in the optical integrating sphere and radiated by the light beam repeatedly, and then electric signals which can reflect spectrum information of the human body are collected through the two sets of bandpass filters with different wavelengths and the photoelectric sensors on the outer wall of the optical integrating sphere; and the electric signals are analyzed and calculated through the signal processing circuit, and blood glucose concentration information is obtained finally.

The invention relates to the fields of the fiber technology, the optical engineering, the material engineering and the signal processing technology, and specifically relates to a fiber Fabry-Perot sound wave probe and a signal demodulation system. The probe employs a reduced graphene oxide film as a sound vibration sensitive film, so the probe is easy to transfer, is simple in manufacturing, is low in cost, and is high in yield. The demodulation signal employs a three-wavelength phase demodulation method. A broadband light source, a circulator, the fiber Fabry-Perot sound wave probe, a wavelength division multiplexer, a three-channel photoelectric detector, a data collection card and a data processing module cooperate with each other for application, thereby enabling the fiber Fabry-Perotsound wave probe not to be affected by temperature in a working process. The system employs the broadband light source which is low in cost, and the system is high in stability. The system cooperateswith the fiber Fabry-Perot sound wave probe, and can be used for the fields of safety monitoring, medical and biomedical engineering.

The invention relates to the field of optical engineering, optical fiber optics and sensing techniques and particularly relates to an optical fiber distributed sensing system of a U-type sensing fiber deployment structure. According to the technical scheme of the invention, a sensing fiber arranged in the optical fiber distributed sensing system and used for detecting a vibration signal is set to be of a multi-U-type structure. The multi-U-type structure comprises N-1 U shapes formed by N parallel edges, wherein adjacent U shapes are different in direction and N is larger than 1. From the initiating end of the sensing fiber, the sensing fiber is successively divided into a series of continuous and isometric channels. The length of each channel is one half the line width T of an incident pulse laser. Each channel on one parallel edge of the sensing fiber is not overlapped with the corresponding channels on the adjacent parallel edges of the sensing fiber in a direction vertical to the parallel edges of the sensing fiber. On the premise that the pulse width and the incident power of a light source and the minimum integration time of a photoelectric detector are not reduced at all, the spatial resolution of the system is improved.

The invention relates to the fields of fiber technology, optical engineering and material engineering, and particularly to a fiber Fabry-Perot sonic probe device and a manufacturing method thereof. According to the fiber Fabry-Perot sonic probe device, parallel transmission and reflection of outlet light beams are realized through a graded-index multimode fiber, and receiving rate of light which is reflected by a graphene film is improved. The metal-doped graphene film improves light reflection rate. The fiber Fabry-Perot sonic probe device and the manufacturing method settle a problem of relatively low probe sensitivity caused by film thickness increase for improving reflectivity of the graphene film, and realizing high-sensitivity detection for an acoustic signal. The fiber Fabry-Perot sonic probe device has advantages of simple manufacture, small size, high sensitivity, high electromagnetic interference resistance, etc. The fiber Fabry-Perot sonic probe device can be widely applied in the field of safety defense monitoring, underwater monitoring, medical science, biomedical engineering, etc.

The invention relates to the technical fields of optical fiber technology, optical engineering and material engineering, in particular to a graphene-based Q-switched pulse fiber narrow line-width laser. A distributed feedback bragg grating DFB is fabricated on an erbium-doped fiber; the fabricated DFB region completely coats a graphene film; with graphene as a Q-switched material, namely a saturable absorber, of a DFB narrow line-width cavity, rapid adjustment of the loss of the graphene on a DFB composite cavity when the power rate of a pump light is greater than 5MHz is achieved; and high-frequency pulse laser output is generated. The all-fiber pulse narrow line-width laser for carrying out Q-switching on a fiber laser resonant cavity is achieved, has the advantages of being low in cost, simple in structure, good in stability, high in modulation rate, small in output line-width, easy to integrate and the like, and has a wide application prospect in the fields of optical fiber communication and optical fiber sensing.

The invention discloses a conical phase locking carbon dioxide laser, and belongs to the fields of optical engineering and laser application. The conical carbon dioxide laser and axially-symmetric output beams are subjected to phase locking, and then convergent beams form intense coherent superposition, so the conical phase locking carbon dioxide laser has the laser processing efficiency and property sufficiently close to that of an axial flow carbon dioxide laser or even exceeding, and has the advantages in the aspects of device volume and use convenience. The conical phase locking carbon dioxide laser has good compactness the same as a cylindrical CO2 laser and a flat waveguide CO2 laser, the quality and the coherence of the output beams of the conical phase locking carbon dioxide laser are higher than those of the cylindrical CO2 laser, and the compactness and the output level quality of the conical phase locking carbon dioxide laser are higher than those of the flat waveguide device. After being processed by a convergence system, the output beams of the conical phase locking carbon dioxide laser can be conveniently applied to surface treatment, welding, cutting, perforating and the like of metal and nonmetallic materials; and the conical phase locking carbon dioxide laser can become an important device for laser processing.

The invention relates to a laminated shearing piezoelectric ceramic actuator, which is composed of an actuator body, an upper end layer, a lower end layer, an external input positive electrode port and an external input negative electrode port. The laminated shearing piezoelectric ceramic actuator is characterized in that: according to the converse piezoelectric effect principle in shearing piezoelectric ceramic, the piezoelectric ceramic flakes with opposite polarization directions are staggered and cemented or sintered; the corresponding layers of the piezoelectric ceramic flakes are arranged through a binary method, to form an external input electric port; while the external electric field is changed, the actuator can be driven by a digital mode to bring about corresponding transformations. The laminated shearing piezoelectric ceramic actuator has bright application prospect for the optical engineering, precision machine, national defense science and technology, and the like.

An optical system for AR glasses relates to the field of optical engineering, and can be used to solve the problems of small field angle, small exit pupil diameter and heavy system of the existing ARglasses. The optical system comprises a display system and a spherical reflecting lens; the spherical reflecting lens is provided with two surfaces, the first surface is a partial reflecting surface,and the second surface is a transmission surface; the display system is placed in front of the pupil and located in the focal plane of the spherical reflecting lens, and the spherical centers of the display system and the spherical reflecting lens are both located within the range of 1cm from the center of the pupil; the display system comprises linear array display pixels pasted on a transparentsubstrate, and a substrate extension part, an outer frame, a driving system and an electronic control system in the outer edge of the transparent substrate; and the driving system comprises a driven gear, a driving gear, a rotating bearing and a motor. Thus, a large field angle, a large exit pupil diameter and high resolution can be realized, and the glasses are light, simple to manufacture, low in cost, easy to realize, stable in component fixation and structure and free of stray light interference.

The invention discloses a phase locking combined type high-power carbon dioxide laser adopting cylinder discharge, relating to the fields of optical engineering and laser application. The laser comprises a toric mirror, an axicon, a concave mirror, an inner cylinder, an outer cylinder, a quartz discharge tube, a convergent lens and a support. According to the phase locking combined type high-power carbon dioxide laser adopting cylinder discharge, light beams output from an output mirror are changed into one tiny hollow annular carbon dioxide laser beam after being converged by the convergent lens, and the high-power carbon dioxide laser has the advantages of high powder, good coherence, high laser beam quality, compact structure and small size, and can be directly erected on a machine tool for machining.

The invention belongs to the technical field of optical engineering and particularly relates to an optical axis alignment device and method based on camera imaging. The optical axis alignment device comprises a first guide rail, a second guide rail, a third guide rail and a computer, wherein the first, second and third guide rails are arranged sequentially in a same horizontal plane and the computer is used for analyzing camera image coordinates; the second guide rail is parallel to the third guide rail and perpendicular to the first guide rail; a camera and a first division plate are mountedon the first guide rail, a second division plate is mounted on the second guide rail, and a third division plate is mounted on the third guide rail; an optical axis where the center of the first division plate and the center of a lens of the camera locate is a fixed optical axis; an optical axis where the center of the second division plate and the center of the third division plate locate is an adjustable optical axis. An imaging method is used in alignment and is as precise as alignment by direct observation via a theodolite and is universal in engineering applications.

The invention relates to a fabrication method for a combined cylindrical discharge high-power gas laser and a combined cylindrical discharge high-power gas laser device, and belongs to the field of optics and optical engineering. The method is characterized in that an inner cylinder and an outer cylinder that are coaxial are placed on a symmetric axis of the device in an embedded manner, and a radio-frequency power supply discharges to excite the combined cylinder to obtain high-power hollow annular carbon dioxide laser beams or carbon dioxide laser beams. A four-mirror stable resonator is adopted, so that high-power laser output can be achieved under a condition of a short laser cavity. The higher-power hollow annular carbon dioxide laser or the carbon dioxide laser can be used for laser processing, material processing and other aspects, and the lower-power hollow annular carbon dioxide laser or the carbon dioxide laser can be used for laser cosmetology, laser surface processing and the like. The hollow annular laser beams can be focused into a hollow beam with a smaller dark space, and can be used for optical spanners, optical tweezers, optical conduits and the like. The device has the advantages that the device is compact in structure and high in output power, and the beams are convenient to transform.

The invention relates to a laser beam coaxial same-wave-surface control system and method, and belongs to the technical field of optical engineering.The laser beam coaxial same-wave-surface control system comprises multiple paths of input sub-beam lasers, a sampling mirror, a light beam separation unit and a processor, and the input sub-beam lasers are transmitted to a first beam combining element through a collimation transmission unit to form a combined laser; the combined laser is divided into a measuring laser and a main laser through a sampling mirror, the measuring laser is divided into multiple measuring sub-beam lasers through the light beam separation unit, wavefront aberrations of the multiple measuring sub-beam lasers can be collected respectively, the wavefront aberrations are calculated through a processor, pointing information and defocusing information are obtained, and pointing control and focal plane control of the input sub-beam lasers are realized. By means of the light beam separation unit, one wavefront sensor or an image sensor collects wavefront information or light spot information of multiple paths of lasers respectively, pointing information and defocusing information are obtained through calculation of a processor, a driving device is used for adjustment, closed-loop control is achieved, and the pointing error and the focal plane error of the light path are eliminated.

The invention discloses a colorimetry-based test device for magnesium and magnesium alloy ignition temperature and a use method of the test device and belongs to the technical field of optical engineering and sensors. The test device comprises a metal housing, a sapphire window, an object lens, a field lens, a two-quadrant detector, a conditioning circuit and an interface circuit, wherein the sapphire window, the object lens, the field lens, the two-quadrant detector, the conditioning circuit and the interface circuit are arranged inside the metal housing, the two-quadrant detector is used for detecting spectral wavelengths of the magnesium and magnesium alloy ignition temperature, and the test has the advantages of being simple in design structure, small in volume, light in weight, convenient to use, long in service life, reliable in measurement and the like. The use method of the test device comprises that a standard temperature-measurement measuring instrument is used for conducting static calibration for the colorimetry-based test device for the magnesium and magnesium alloy ignition temperature, the measurement accuracy and measurement the reliability are guaranteed due to the fact that the static calibration is conducted before use, then the standard temperature-measurement measuring instrument and the test device test the temperature of an object to be tested together, test results are compared, and the test results for the magnesium and magnesium alloy ignition temperature are reliable and accurate. The test device and the use method are worth using and popularizing.

The invention discloses a vibration mobile mechanism based on smart material driving, and a preparation method of the same. The vibration mobile mechanism based on smart material driving includes a driver and support feet, wherein the driver includes dielectric elastomer material, an upper framework and a lower framework; the dielectric elastomer material is clamped between the upper framework and the lower framework; the upper framework and the lower framework are fixed on the plurality of support feet; an upper surface copper foil electrode is arranged on the upper framework; a lower surface copper foil electrode is arranged on the lower framework; the upper surface copper foil electrode and the lower surface copper foil electrode are arranged at the opposite two sides of the vibration mobile mechanism; the upper surface of the dielectric elastomer material is coated with an upper surface carbon paste electrode which is electrically connected with the upper surface copper foil electrode; and the lower surface of the dielectric elastomer material is coated with a lower surface carbon paste electrode which is electrically connected with the lower surface copper foil electrode. The vibration mobile mechanism based on smart material driving utilizes the dielectric elastomer smart material as the driving core, has the advantages of being simple in structure, being light in weight and being high in motion resolution, and has greater application potential in the industrial detection field, the micro-electro-mechanical system assembling field, the optical engineering field and the like.

The invention relates to the field of precision measurement technology and the field of optical engineering and in particular relates to a portable combined zero setting high precision laser large working distance auto-collimation device and method. The device comprises a light source, a collimating mirror, a reflector, and a feedback imaging system. The method makes reflected light beams return to the image plane center of the feedback imaging system by adjusting the reflector and obtains the angle change of the surface of a measured object by means of an angle deflection measuring device on the reflector. The reflector is added to a conventional auto-collimation angle measuring system, so that the problem that measurement is impossible because reflected light of a measured object deviates from the measuring system is solved and the auto-collimation working range is increased on the condition of the same working distance or the working distance is increased on the condition of the same working range. Owing to the specific design of the collimating mirror, the feedback imaging system and the reflector, the device is small, portable, and high in measurement precision, can monitor the stability of measurement environments, and can perform measurement rapidly.

The invention belongs to the field of precision measurement technology and optical engineering, and specifically relates to an array zero-setting laser large working distance auto-collimation device and method. The device is composed of a light source, a collimating mirror, a reflector and a feedback imaging system. In the method, by adjusting the reflector, a reflected beam is returned to the center of an image plane of the feedback imaging system, and then an angular deflection measuring device on the reflector is used to obtain angle changes of the surface of a measured object. In the invention, since the reflector is added to the conventional auto-collimating angle measuring system, it is possible to avoid the problem that measuring can not be carried out since reflected light of the measured object deviates from the measuring system, so that the advantage of increasing the auto-collimation range at the same working distance or increasing the working distance in same auto-collimation range are realized. In addition, the specific design of the collimating mirror, the feedback imaging system, the reflector and the like make the device of the invention simple in structure, low in production cost, and capable of performing measurement in an unstable measurement environment; and a technical advantage of rapid measurement is realized.

The invention relates to the technical field of optical engineering, and further discloses a calibration method for rapidly determining the geometric position of each part in the deflection measurement system. The method comprises: making the upper plane of a standard cylinder into a standard mirror surface, making a circle of evenly-distributed black round spot features on the periphery of the standard mirror surface, the radius of one round spot being small, setting the mirror surface to be a coordinate system xOy plane, and the x axis being arranged on the axis where the round spot is located; firstly, directly determining the position of a standard mirror surface in a camera coordinate system through a PnP method according to imaging of mirror surface circular spots, displaying a small-size dot array pattern on a screen, shooting a screen virtual image reflected by the mirror surface through a camera, recognizing spots displayed on the screen in the image, and the position of the screen can be determined. The method can effectively estimate the pose of each part in the measurement system, including a camera, a screen, a chuck and a workpiece, is simple to operate and high in practicability, and has important significance for realizing high-precision deflection measurement of the optical curved surface.