269results about How to "Reduce the difficulty of assembly and adjustment" patented technology

The invention discloses a solid-state two-dimensional scanning laser radar and a scanning method thereof. The solid-state two-dimensional scanning laser radar comprises a control processing module and also comprises a laser transmitting module and a laser receiving module connected to the control processing module. The laser transmitting module includes a laser, a collimating lens and a vibrating lens. The collimating mirror collimates a detection laser beam emitted by the laser to the vibrating lens, and the detection laser beam is transmitted in different angles by the vibrating lens. The laser receiving module comprises a first mirror, the vibrating lens, a receiving telescope and a light detector, laser echo reflected from the surface of a target object is reflected to the vibrating lens through the first mirror and then is emitted to the receiving telescope in a fixed direction. The control processing module controls and perceives the working states of the laser, the vibrating lens and the light detector and carries out data processing and analysis. The MEMS vibrating lens is used as a scanning device and also is used as a receiving device, the structure is simplified, the cost is reduced, and the synchronization of the attitudes of the scanning device and the receiving device is not needed.

The invention relates to an uncooled double-field-of-view infrared optical system and belongs to the technical field of optics. A first positive meniscus lens, a second double-concave negative lens, a diaphragm, a third double-convex positive lens, a fourth double-convex positive lens, a fifth negative meniscus lens and a detector are coaxially arranged from an object space to an image space, wherein the second double-concave negative lens can axially move between the first lens and the diaphragm to form a narrow-field-of-view light path and a wide-field-of-view light path respectively. The system is provided with two optical fields of view, namely a wide field of view and a narrow field of view, wherein the wide field of view is used for target detection, and the narrow field of view is used for target identification; due to an aspheric design, the double-field-of-view optical system has higher degree of freedom, alternative variables for optimization design are increased, and an optical aberration design is easy to obtain high image quality; and because transformation and focusing compensation of the two fields of view are realized due to movement of the same lens, movement mechanisms in the system are reduced, the rest components in the light path are fixed parts which are easy to assemble and debug, and the assembling and debugging difficulty of the system is reduced greatly.

The present invention belongs to the technical field of deep space navigation sensor, specifically discloses an imaging structure of a fixed star sensor, wherein a secondary aspheric surface is applied to an optical surface of an aberration correction lens, which not only can correct the aberration to make system imaging reach a level of near diffraction limit, but can also reduce difficulties ofsystem processing and resetting, and save cost; simultaneously the aberration correction lens can play a part in protecting a window, so as to prevent the system from the damage of space environment,such as irradiation, temperature difference, etc.

The invention relates to a phase-shifting secondary interference confocal soft-pinhole detection device and a method, belonging to the field of measurement of ultra-precise three-dimensional microstructure surface topography. The soft-pinhole detection device comprises a microobjective and a CCD camera. The method comprises the steps: removing a measuring surface, moving the microobjective and the CCD camera to determine the position for collecting a microobjective benchmark focal plane, positioning an Airy spot center on a CCD image surface, intercepting and locking a fixed pixel area with different microscopic magnification times on the CCD image surface as a soft-pinhole, adjusting the microobjective and the CCD camera to display a clear amplified image of a horizontal spot on the position for collecting the microobjective benchmark focal plane, adding the measured surface, and completing the specific micro-displacement measurement by phase-shifting secondary interference confocal measurement. The invention can provide the flexible equivalent pinhole style, effectively reduce alignment errors of the actual confocal pinhole and improve the detection precision of phase-shifting secondary interference confocal spots.

The invention provides a galvanometer panoramic scanning device and a scanning method thereof. The galvanometer panoramic scanning device comprises a control and processing module as well as a laser emitting module, a scanning module and a laser receiving module which are connected with the control and processing module; the laser emitting module comprises a laser and a collimator lens group, wherein the collimating lens collimates a detection laser beam emitted by the laser and sends out the collimated detection laser beam; the scanning module comprises a galvanometer and a first reflector, wherein the galvanometer sends the collimated detection laser beam to the first reflector in a deflecting manner, and the first reflector reflects the detection laser beam to a target object; the laser receiving module includes a receiving telescope and a light detector, wherein the receiving telescope receives laser echoes which are reflected or diffusely reflected by the surface of the target object; and the control and processing module controls and senses the working states of the laser, the galvanometer and the light detector and performs data processing analysis. The installation adjustment difficult of the galvanometer panoramic scanning device of the invention is low, a user does not need to adjust a plurality of distance measurement systems one by one; the frequency of the galvanometer is higher than the frequency of a mechanical rotating component, so that the scanning speed of the galvanometer panoramic scanning device is faster.

The invention belongs to the technical field of optical precision measurement, and relates to a method for measuring central thickness of a reflecting type differential confocal lens. According to the method, a vertex on the front surface and a vertex on the rear surface of the lens are precisely positioned by matching a differential confocal measuring method with a plane reflecting mirror, so that the central thickness of the lens is measured according to a ray tracing formula. The vertex on the front surface and the vertex on the rear surface of the lens are highly precisely focused and collimated for the first time by combining light beams emitted by the measured lens with a differential confocal technology, the assembling and adjusting difficulty of the measured lens is greatly reduced, and the method has the advantages of high measuring precision and high capacity of resisting environmental disturbance, and can be used for highly precisely detecting the central thickness of the lens.

The invention, which relates to the space optical remote sensing field, provides an alignment system and adjusting method for a large-calibre space optical camera lens. With the system and method, problems of low optical transfer function and imaging quality of the optical system of the existing large-calibre space optical camera lens can be solved. The alignment system comprises a camera lens, a lens alignment frame, three lens connecting bases, a secondary lens alignment frame, a secondary lens adjusting frame, a plane lens, a plane lens two-dimensional adjusting mechanism, an interferometer, an interferometer adjusting frame, and a three-lens adjusting frame. The camera lens consists of a camera frame, a secondary lens assembly, a secondary lens pad block, a main lens assembly, a camera substrate, a rear bracket, a first folding lens assembly, a three-lens assembly, a three-lens pad block, a second folding lens assembly, and three connecting supports. With the alignment structure at the vertical direction of the optical axis of the camera lens, the precision changes of relative positions of all reflection lenses are small and the imaging quality of the optical system is kept to be the same when the large-calibre space optical camera lens enters a microgravity environment of the space after alignment on the ground.

The invention provides a large space optical remote sensor four-dimensional regulating device, and belongs to the field of pose regulating devices used for ground installation and calibration of large precise optical equipment. The device comprises a bearing frame, a sliding block rocker type turning mechanism, two multi-foot type air floation supporting mechanisms, a spherical secondary supporting mechanism, a torsional pendulum regulating mechanism, a torsional pendulum keeping mechanism and a heavy load transitional motion assembly. When the device is used, the operation risk of an optical remote sensor in an installation process is low, and a pitching motion range is large when the pose is regulated; the multiple air feet are connected in parallel for use, the creeping phenomenon is effectively eliminated, and torsional pendulum regulating accuracy is improved. A fixed transitional motion supporting point is used in cooperation with an air floatation supporting point to constitute a four-dimensional small-route driving system having the high-resolution fine-tuning function, the device can meet the high-resolution pose regulation requirement for the optical remote sensor of optical detection, the shafting structure is greatly simplified, and installing and regulating difficulty is lowered. The device is small in appearance size, low in rotating center of gravity, short in production phase, capable of being used for the fields of installing, fixing, position pose regulating and the like of large space optical remote sensors.

The invention discloses a dynamic local amplification high resolution imaging system, belongs to the technical field of an optical apparatus and solves technical problems of conflicts between a largeview field of long-distance target detection and high resolution imaging, the complex system structure and relatively high cost existing in an optical imaging system in the prior art. The system comprises an imaging object lens, a small aperture local magnifying lens group, a relay image rotation lens set, a transmission type liquid crystal spatial light modulator (SLM) and a detector image plane,wherein the small aperture local magnifying lens group and the transmission type liquid crystal spatial light modulator (SLM) are used for realizing local area amplification and high resolution imaging. The system is advantaged in that the small aperture local magnifying lens group is arranged near the intermediate image plane position, two-dimensional scanning in the x and y directions is carried out through the small aperture local magnifying lens group, one-time image plane different position dynamic local amplification is realized, through the relay lens set, local amplification images atdifferent positions are acquired on the detector image plane, the system structure is simple, cost is low, and dynamic local amplification in the large view field scope can be realized.

The invention discloses a mixed compensating type sub-aperture spliced surface shape detection method. During the sub-aperture spliced surface shape detection process, the area of the single sub-aperture measurement is enlarged on the premise that a small CGH compensator is adopted. Therefore, the number of required sub-apertures is effectively reduced. The error transmission is reduced, and the number of the required compensators is reduced at the same time. The sub-aperture splicing detection means is combined with the mixed compensation means of a lens and a CGH compensator, so that the usage constraint of the adopted CGH compensator within a single compensation detection region, namely a sub-aperture range, can be avoided. The number of sub-apertures required by the convex aspheric surface of the same specification is reduced. As a result, the time cost needed by optical element adjustment and subsequent splicing calculation is reduced. Meanwhile, the number of required CGH compensators is reduced. The detection economic cost is reduced. The transmission and the accumulation of splicing errors are reduced, and the detection precision is improved.

The invention discloses a full-spherical large-aperture catadioptric continuous-zooming optical system. The system comprises a front fixing group with an aperture diaphragm, a zooming group and a compensation group, and a zooming ratio of the system is larger than 2 and smaller than or equal to 30. The front fixing group comprises a plurality of lenses and two reflectors, and all faces are spherical. The system has advantages that non-spherical reflectors of the front fixing group of the large-aperture zooming system are omitted, processing and detection cost is greatly reduced, system tolerance requirements are lowered, and production and adjustment period shortening and difficulty lowering are realized; a rear fixing group in a normal continuous zooming system is omitted, the system is structurally simplified, the overall length of the system is decreased, production cost is reduced, production cycle is shortened, and system weight is reduced.

The invention provides a super-resolution spectrograph based on multiple slit arrays, and belongs to the field of spectral analysis instruments. The super-resolution spectrograph solves the problems that a super-resolution spectrograph is high in adjustment process requirement and high in difficulty through the adoption of the sub-pixel technology, an entrance slit in the super-resolution spectrograph is N-order slit arrays, spatial filtering is carried out on incident rays through the entrance slit to enable the incident rays to be incident to a collimating mirror according to the required width of an optical system, the rays are collimated through the collimating mirror, split through optical gratings, focused through a focusing mirror sequentially and then imaged to a photoelectric detector, N frames of low-resolution spectrum charts with sub-pixel displacement are obtained in the direction vertical to the spectrum dimension, information of the spectrum charts is collected by a computer, a recursive algorithm is utilized to solve sub-pixel values to structure a frame of a high-resolution spectrum chart, and the N is a positive integer and larger than or equal to 2. According to the super-resolution spectrograph, on the premise that incident luminous flux is not reduced, spectral resolution is improved, spectral super-resolution is achieved, and the spectral measurement range comprises ultraviolet-visible-near infrared bands.

The invention relates to a common-caliber laser communication optical transceiver based on a phased array and belongs to the technical field of laser communications. In order to solve the problem of poor communication transmission and reception isolation in the prior art, the common-caliber laser communication optical transceiver includes a communication laser source, a beam expansion lens set, apolarization beam splitter, a Faraday rotator, a polarization beam splitting prism, a lambada / 4 wave plate, a fine phased array scanning device, a liquid crystal tunable wave plate i, a coarse scanning device, a liquid crystal tunable wave plate ii, a narrow band filter, a polarization analyzer, an objective lens and a detector. The common-caliber laser communication optical transceiver adopts the laser transmission and laser reception common caliber design to realize the control of the transmission beam angle and the receiving field of view by using the optical phased array device, and usesthe Faraday rotator combined with the polarization beam splitting prism and the polarization analyzer to realize the separation of laser transmission and laser reception; and the common-caliber lasercommunication optical transceiver based on the phased array can be applied to free space laser communication occasion where volume, weight, power consumption and shape are limited.

The invention discloses a zoom projection fish-eye lens generally used for a digital projector, which comprises a front main tube of a lens, a zoom tube of the lens, a compensation tube of the lens, a rear main tube of the lens, a front fixed mirror group, a zoom mirror group, a compensation mirror group, a rear fixed mirror group and an aperture diaphragm, wherein the front fixed mirror group, the zoom mirror group, the compensation mirror group, the rear fixed mirror group and the aperture diaphragm are coaxially arranged on the positions of the front main tube of the lens, the zoom tube of the lens, the compensation tube of the lens and the rear main tube of the lens. The zoom structure mode of the zoom projection fish-eye lens disclosed by the invention is a mechanical compensation method positive-group zoom and negative-group compensation mode designed by a ''non-object-image exchange principle''. Two cam curves followed by the zoom mirror group and the compensation mirror group are both constructed into standard spiral lines. According to the zoom projection fish-eye lens generally used for the digital projector, which is disclosed by the invention, two standard spiral lines with a regular lead are used as the cam curves of the zoom mirror group and the compensation mirror group, so that the production difficulty and the assembling and adjusting difficulty are lowered, and the stability of a lens structure and the regulation smoothness are improved. The zoom projection fish-eye lens generally used for the digital projector is favorable for mass production and can be used for common 1LCD (liquid crystal display), 3LCD or 1DMD (digital micro-mirror device)-type digital projectors with chips of different sizes and different chip length-width ratios.

The invention belongs to the technical field of spinning forming, and discloses a multi-pass spinning forming method for a long barrel with inner annular reinforcing ribs. An inner spinning technologyand a tension spinning technology are combined, only a set of annular core dies with different inner diameter sizes and the length being 400 mm are adopted to achieve multi-die multi-pass spinning forming of the long barrel part with the multiple inner annular reinforcing ribs and the length being 2m or less, and the part reinforcing rib position and size precision can be ensured. The method comprises the steps of spinning workblank design, spinning workblank machining, stress relief treatment, workblank installation adjusting, multi-pass spinning, turning, stress relief treatment and the like. Multi-pass low-cost forming of the long barrel with the inner annular reinforcing ribs is achieved, and the material utilization rate is greatly improved; and compared with a traditional technology, the technological risk and the difficulty of multi-pass accurate forming of the inner annular reinforcing ribs are lowered, the material cost is reduced, and the product quality is improved.

The invention relates to a structural component of a space camera, and in particular to a support-integrated reflector. The support-integrated reflector comprises a reflector panel integrally formed by a metal material, a support plate and a back plate. One side of the support plate is the reflector panel, and the other side of the support plate is the back plate. The support plate comprises an outer frame, an inner frame and net-shaped ribs, the outer frame is positioned on the outer circumference of the support plate, the inner frame is positioned at the center of the support plate, and the net-shaped ribs are positioned between the outer frame and the inner frame. The outer frame is provided with a plurality of sub-frame installing plates and a plurality of flexible brackets. The support-integrated reflector is capable of solving the technical problem that the traditional reflector and the support structure thereof need to be machined, assembled and used alone. The reflector and the support are integrally designed, the traditional reflector support structure is eliminated, and one component is used as the reflector and the support. The weight of the whole device and the number of the parts can be reduced, the reflecting cost is decreased, and the rigidity of the integrated structure is improved.

The invention provides a solar grating spectrum imaging device capable of correcting system aberration. On the premise that cost and system complexity are not increased evidently, an adaptive optical system with double wavefront detectors is formed by an adaptive optical system integrated in a telescope system and a wavefront detector arranged at a conjugation position of a focal surface of a spectrograph system. Therefore, the solar grating spectrum imaging device is not only capable of correcting dynamic wavefront aberration but also capable of correcting static aberration of the whole optical system to give great significance to improvement of spectral imaging quality of the spectrum imaging device.

The invention provides an embedded semi-physical simulation system based on active following of an air floating ball socket, wherein a platform cabin and a load cabin are connected through a magneticlevitation mechanism; an air floating ball bearing assembly of the platform cabin and an air floating ball bearing assembly of the load cabin are arranged in the same sphere center, so that the Rx, Ryand Rz degree-of-freedom co-center movements of the platform cabin and load cabin are achieved; a plane thrust air floating bearing of the platform cabin and a plane thrust air floating bearing of the load cabin are arranged to achieve X and Y degree-of-freedom movements of the platform cabin and load cabin. Through the active control of an electric cylinder arranged on a platform cabin support rod on the platform cabin, the rotation movement of the platform cabin air floating ball socket, actively following the platform cabin air floating ball socket, is achieved, according to the invention,the swing angle is large, the bearing capacity is high, the vertical bearing capacity of the platform cabin air floating ball bearing assembly is obviously increased, the air floating size of the platform cabin air floating ball bearing assembly is reduced, the installing and debugging difficulty and the processing difficulty are obviously reduced.

The invention belongs to the technical field of optical precision measurement, and relates to a method for measuring the center thickness of a reflective confocal lens. The method comprises the steps of precisely positioning the vertex of the front surface of the lens and the vertex of the rear surface of the lens by using a confocal measurement method and a plane mirror, and obtaining the center thickness of the lens according to a ray tracing formula. High-precision fixed focus collimation of the vertex of the front surface and the vertex of the rear surface of the measured lens is realized by utilizing light rays emitted by the measured lens for the first time, and adopting the confocal technology, difficulty in adjustment of the measured lens is reduced to a great extent, and the method has the advantages of high measurement precision and environmental interference resistance, and can be used for precisely measuring center thicknesses of the lenses.

The invention is a PSD Hartmann-Shack wavefront sensor based on microprism array, characterized in comprising microprism array, focusing lens, position sensitive detector (PSD) array, and data collecting and wavefront reconstructing unit, where the microprism array and the focusing lens clinging to the microprism array combinedly divide the system pupil, the PSD array is arranged on the focal plane of the focusing lens and the output of the PSD array is connected to the data collecting and wavefront reconstructing unit. The invention can overcome the problem of inconsistent focuses of all cells of the microlens array. The invention largely raises the sampling speed and omits the software-based calculating course, simple and largely reducing the follow-up processing burden. And the system is simple in structure and easy to manufacture and implement and batch production.

The invention discloses a large-focal-ratio wide-field-of-view off-axis three-mirror optical system with a real entrance pupil. The whole optical system comprises a diaphragm, a main mirror, a secondary mirror, a third reflecting mirror and a focal plane and is characterized in that a real diaphragm is arranged in front of the main mirror, a distance between the main mirror and the real diaphragmis greater than a mirror interval between the main mirror and the secondary mirror, and the real entrance pupil of the off-axis three-mirror optical system is formed; and the curvature radius R1 of the main mirror, the curvature radius R2 of the secondary mirror and the curvature radius R3 of the vertex of the convex third reflecting mirror approximately meet a flat image field condition 1 / R1+1 / R3=1 / R2. By use of the system, the defect in the prior art that the entrance pupil surface of a detected space camera and the entrance pupil surface of a spectrograph camera can not be accurately matched since the diagram is positioned on the main mirror and is not provided with the real entrance pupil can be overcome. The optical system disclosed by the invention is provided with the real entrancepupil, the focal ratio of the optical system is greater than 12, a field of view 2o*2o is designed, and the wavefront quality of the optical system is superior to RMS (Root Mean Square) 1 / 40 wavelength.

The invention relates to a soft X ray grazing incidence optical system based on a double-energy-point multilayer membrane and an application thereof. The optical system comprises an objective lens, wherein the double-energy point multilayer membrane is plated on the objective lens, the double-energy-point multilayer membrane is composed of an upper side membrane system and a lower side membrane system, the upper side membrane system is used for reflecting aiming at working energy point soft X rays, and the lower side membrane system is used for reflecting aiming at 8 keV energy point soft X rays; and firstly the optimal object point of the 8 keV energy point is found through a Cu target X ray under a laboratory atmospheric environment, the optimal object point is the same as the optimal object point of the soft X ray grazing incidence optical system, and a strong laser device is switched and is used for an ICF (inertial confinement fusion) physical experiment on the actual soft X ray working energy point. Compared with the prior art, the soft X ray grazing incidence optical system has the advantages of being low in cost, simple in installation and adjustment, short in experiment time, capable of causing no additional error and adding no magnetron sputtering equipment, and the like.

The invention discloses a measurement and correction method of entire beam path aberration for an inertial confinement fusion device, wherein, a Hartmann wave-front sensor is arranged in the beam path behind a laser amplifier for detecting the near field wave-front; a reflection deformable mirror is arranged in the beam path before the Hartmann wave-front sensor, a CCD is arranged in the entire beam path far field for detecting the strength distribution of the focal spot; the dynamic aberration is directly measured by the Hartmann wave-front sensor, the static aberration is jointly measured by the reflection deformable mirror, the Hartmann wave-front sensor and the far field CCD which are matched with each other; when the reflection deformable mirror is driven, the Hartmann wave-front sensor records different wave-fronts modulated by the deformable mirror; at the same time, the far field CCD records the corresponding far field strength; according to the recorded different near field modulated wave-fronts and the corresponding far field strength data pairs, the entire beam path static aberration of the inertial confinement fusion device is calculated by the iterated algorithm, which drives the reflection deformable mirror to correct the aberration. The invention realizes the measurement and correction of entire beam path aberration for the ICF device.

The invention relates to a four-channel KB microimaging system working under small-size backlight. The four-channel KB microimaging system comprises two KB objective lenses which are arranged in the meridian direction in sequence and two KB objective lenses which are arranged in the sagittal direction in sequence; and X ray emitted by an object point is respectively reflected by the two KB objective lenses in the meridian direction to form one-dimensional imaging of the two channels, and then the one-dimensional imaging of the two channels is respectively reflected by the two KB objective lenses in the sagittal direction to form two-dimensional imaging of the four channels. Compared with the prior art, the four-channel KB microimaging system has the advantages that the four KB objective lenses are arranged in sequence and are not interfered in space, so that the installation difficulty is also reduced, the requirement of the four-channel KB system on the size of the X ray of the backlight is obviously reduced, the intensity of the X ray of the backlight on the unit area is also correspondingly increased, the application range of the four-channel KB system in an ICF (Inertial Confined Fusion) physical experiment is expanded; and the four-channel KB microimaging system is suitable for being used on the current intense laser devices in China.

The invention discloses a visible light and medium wave infrared common-caliber composite optical system. The system comprises four parts, namely a common transmission system (100), a beam splitter prism group (200), a visible light path correcting system (300) and an infrared light path correcting system (400). The system covers two wave bands of the visible wave band and the medium wave infraredband, and can work in the daytime and at night respectively. Therefore, the imaging at a large view field and all day long can be realized. Compared with a traditional split structure, the system hasthe advantages of compact structure, good co-axial consistency, high pointing precision, small volume and light weight. Compared with a novel common-caliber folding and reflecting structure, the system has the advantages of large visual field, easy and convenient installation and adjustment, and the like. The system can realize the wide-area and all-day-time monitoring effect for a target area, and the performance of photoelectric reconnaissance equipment is effectively improved.

The invention belongs to deep-space navigation sensor design field, and specifically discloses a star sensor. By a bearing plate arranged between a lens and a circuit box, adetection circuit board is connected with the afterbody of the lens and is fixed in the circuit box after passing through the bearing plate, so that the structure can play a role in protecting the lens. Because of the perforated structure, the bearing plate has a lighter weight. The detector assembly is directly installed on the lens focal plane structure, thereby assuring the focusing precision not to be influenced by the deformation of the bearing plate and the circuit box and assuring the sensor precision level.

The invention belongs to the adaptive optical field and discloses an adaptive liquid crystal optical system capable of switching between an open loop adaptive correction function and a close loop adaptive correction function, relating to the combination of optical elements, such as a liquid crystal corrector, a wavefront detector, a wave plate, a PBS beam splitter and the like. The invention provides an adaptive liquid crystal optical system capable of opening loop, which has simple operation, low resetting difficulty and favourable stability and has the close loop adaptive correction mode. The system adopts the PBS beam splitter to replace a common polaroid, so that the adaptive liquid crystal optical system has high energy utilization ratio; as the PBS performs polarized beam splitting after being arranged in the liquid crystal corrector and is combined with an optical rotation mechanism, a detection corrector does not need to rotate PBS during response matrix, avoiding the optical axis retting error caused by the motion. In addition, the system can be switched into the adaptive correcting optical system capable of closing loop, and can quantificationally detect the correction performance of the detection system in the loop closing mode so as to provide convenience for resetting the adaptive liquid crystal optical system capable of opening loop.

The invention provides a collimation projection relay optics system design method based on a holographic optical element. The method is mainly applied in a vehicle-mounted head-up display (HUD). In the system, a transmission-type holographic optical element assembly is used and the system is designed to be an inverted infinity imaging system. An image generated by an image source is changed into parallel light which is projected and enters into an optical combination display portion, and most of aberrations generated at a position of combination glass can be compensated. The aberrations and distortions of the whole set of the system are less. The system possesses a large off-axis angle and a field angle so that an imaging quality can be obviously improved. Because the holographic optical element is used to replace a traditional refractive optical element, the size of the whole set of system is small; weight is light; batch production cost is low; the structure is simple; assembling and adjusting difficulties are low; the system is easy to be installed in a small space.

The invention discloses a terahertz time-domain spectrum measuring system which comprises a femtosecond laser system, a terahertz emitting device, a terahertz detection device, a sample measuring device and a time delay scanning device, wherein pumping laser and detection layer are output from the femtosecond laser system and are respectively transmitted to the terahertz emitting device and the terahertz detection device to generate terahertz waves; the terahertz detection device is used for receiving terahertz wave beams and used for converting the terahertz wave beams into voltage signals; the sample measuring device is positioned in a terahertz optical path and is used for controlling the terahertz wave beams to enter a sample; the time delay scanning device is used for changing a propagation optical path of the terahertz wave beams between the terahertz emitting device and the terahertz detection device. By adopting the system, the harsh requirements of optical reflection surface roughness and movement mechanism stability in the time delay scanning device are remarkably degraded, the optical path mounting and regulating difficulties are reduced, and the device cost of the terahertz time-domain spectrum measuring system is greatly reduced.