394 results about "Secondary mirror" patented technology

The invention relates to the technical field of intelligent precision calibration of optical instruments, in particular to a primary and secondary mirror calibration method based on a neural network algorithm, which comprises the following steps: step 1, synchronously acquiring multi-physics field coupling data of primary and secondary mirrors; step 2, constructing a dual-mode neural network model, wherein the dual-mode neural network model comprises a first model and a second model; 3, kinematics feasibility verification and dynamic optimization are carried out on the initial prediction value, specifically, a Lie group space parameterization method is adopted to avoid a rotation freedom degree singular point, and a platform reachable working space is adjusted through Jacobian matrix verification; and 4, driving a secondary mirror adjustment platform based on the optimized adjustment parameters, and triggering online incremental learning of the neural network model according to the actual wavefront residual error. Through innovative application of the neural network algorithm, multiple technical problems of a traditional optical system calibration method in an extreme environment and a high-frequency dynamic condition are solved, and the calibration precision, the real-time performance and the efficiency are improved through self-learning and self-adaptive capabilities.

The invention discloses a three-band common-caliber multifunctional optical system. Belongs to the technical field of optical imaging and particularly relates to the technical field of multiband common-aperture optical systems. The problem that integration, multi-functionalization and miniaturization cannot be achieved at the same time through an existing multi-band common-caliber optical system is solved. The three-band common-caliber multifunctional optical system comprises a primary mirror L1, a secondary mirror L2, a multi-band compensation mirror group L3, a first reflecting mirror L4, a first spectroscope L5, a second reflecting mirror L6, a medium-wave infrared mirror group L7, a third reflecting mirror L8, a laser and short-wave infrared common mirror group L9, a second spectroscope L10, a laser emission mirror group L11, an optical fiber light source S1 and a short-wave infrared mirror group L12. The system comprises an imaging light path and a laser emission light path.

The invention discloses a large-aperture off-axis telescopic system adopting a spherical adjusting structure and an adjusting method thereof, and belongs to the technical field of high-precision optical element supporting and adjusting mechanisms. Comprising a supporting frame, a primary mirror and a secondary mirror, the primary mirror and the secondary mirror are installed on the supporting frame, the primary mirror is installed on the supporting frame through a primary mirror positioning module, and the secondary mirror is installed on the supporting frame through a secondary mirror positioning module and a fine adjustment module; and the fine adjustment module can dynamically adjust the secondary mirror to realize six-degree-of-freedom adjustment of the secondary mirror. According to the invention, the problem of position offset generated when three position degrees of freedom and three angle degrees of freedom of the secondary mirror are adjusted in place and then assembled by using six-degree-of-freedom auxiliary adjustment equipment at present is solved, the adjustment process of the secondary mirror of the large-aperture off-axis telescopic system is simplified, and the adjustment efficiency is improved.

The invention discloses a method for dynamically correcting off-axis aberration of a liquid mirror telescope, which comprises the following steps of: S1, adjusting a secondary mirror body to perform dynamic full-angle circular motion around the center of a primary mirror by using a secondary mirror rotating system, so that the secondary mirror body acquires an incident beam from any direction; s2, acquiring attitude information of the secondary mirror body, and adjusting the secondary mirror body according to the dynamically changeable off-axis angle based on a preset secondary mirror pose adjustment sub-method to compensate for low-order aberration; s3, the light beams of the distorted wavefront compensated by the secondary mirror are adjusted to be emitted in a determined direction in parallel and enter an adjustable beam expanding and shrinking mirror through two groups of plane reflection systems; s4, the light beam with the light spot size adjusted through the adjustable beam expanding and shrinking mirror is reflected to the magnetic liquid deformable mirror through the reflecting mirror; and S5, the magnetic liquid deformable mirror receives the reflected light beam and performs residual aberration correction. According to the method, the observation view field of the liquid mirror telescope can be effectively improved, the imaging quality is improved, and an aberration correction system is endowed with excellent flexibility and wide adaptability.

The invention discloses an off-axis reflection system primary and secondary mirror installation and adjustment method, device and equipment and a storage medium, and the method comprises the steps: placing a primary mirror in a detection light path according to the position setting of an interferometer and a first hologram detection tool, and carrying out the position determination; according to a position determination result, a second hologram gauge is placed in the detection light path so that the positioning reference of the second hologram gauge and the positioning reference of the primary mirror can be kept consistent; and positioning the secondary mirror by using a second hologram gauge, and adjusting the position and posture of the secondary mirror by detecting the light path, so that the positions of the secondary mirror and the primary mirror meet the requirements. The objective of the invention is to solve the technical problems in the prior art that the cost is high, errors are easy to accumulate in the installation and adjustment process, the installation and adjustment effect is poor and the installation and adjustment period is affected because the installation and adjustment of the primary and secondary mirrors need a compensator, and the CGH technology is used to reduce the processing and manufacturing cost of the compensator and improve the detection and alignment precision, the whole process is simple to operate, and the installation and adjustment period is improved.

The invention relates to the technical field of large-aperture telescope construction, in particular to a large-aperture spliced telescope progressive generation method, which comprises the following steps of S1, constructing a local co-phase region at the edge of a large-aperture telescope by using spliced sub-mirrors through assistance of a small-aperture secondary mirror, and forming local co-phase imaging capability; s2, the step S1 is repeated, and equal-area local co-phase regions are constructed at the symmetrical positions of the edge of the large-aperture telescope; s3, constructing an interference imaging system through optical path difference adjustment, zero interference elimination and two symmetrical local co-phase regions; s4, repeating the steps S1 to S3, constructing more symmetrical and equal-area local co-phase regions at the edge of the large-aperture telescope, and constructing interference imaging in which the plurality of symmetrical local co-phase regions participate; and S5, constructing local co-phase regions in sequence from the edge to the center until the construction of the whole large-aperture telescope is completed.

The invention discloses a far-field light field simulation test system for a laser communication terminal. The far-field light field simulation test system comprises a primary mirror assembly, a secondary mirror assembly, a turning mirror assembly, a rod assembly, a focal plane assembly and a frame, the focal plane assembly is composed of a reflector, a spectroscope, a transmitting optical fiber, a receiving optical fiber, a light beam quality analyzer and a coated dichroic mirror. The far-field simulation test system is an off-axis reflection type optical system developed based on the geometrical optics theory. The test system is a core component applied to ground demonstration and verification of space laser communication, serves as a collimator for optical system installation and calibration of a terminal on one hand, provides a complete machine test platform for the space laser communication terminal on the other hand, can serve as a transmitting end to provide a parallel light source and can also serve as a receiving end, and the space laser communication terminal is convenient to use. The detected laser communication terminal is detected, and optical parameters of light beam quality and transmission efficiency of the detected laser communication terminal are effectively evaluated.

The invention is suitable for the field of LED display module quality monitoring, and provides an LED display module out-of-control point monitoring and early warning method and system, and the method comprises the steps: importing a plurality of standard color test images at regular time, and generating a first-level mirror image consistent with a real-time output image of a display module; collecting and identifying the primary mirror image, extracting a plurality of target pixel points, and calculating a deviation value of the plurality of target pixel points; evaluating the real-time color uniformity of the display module and marking a prediction out-of-control point area; external signal sources of different formats are accessed regularly, and a secondary mirror image consistent with a real-time output picture of the display module is generated; collecting and identifying a secondary mirror image, identifying and predicting abnormal information of an out-of-control point area, and determining an abnormal out-of-control point position; the abnormal out-of-control point deterioration trend is continuously obtained, targeted early warning information is generated and sent, out-of-control point monitoring is efficiently completed on the premise that normal work of a display module is not interfered, possible out-of-control areas are locked in advance, and problem expansion is avoided.

The invention discloses a primary and secondary mirror combined detection system and method for a beam shrinking system, and belongs to the technical field of optical detection.The method comprises the steps that a first micro-spherical mirror and a second micro-spherical mirror are arranged, reflection light spots are captured through an interferometer, the position offset is calculated, and a first control instruction for adjusting the pose of a secondary mirror is generated; a dual-band light source is integrated in a detection light path, wavefront data and alignment monitoring data are collected, and temperature drift is corrected to obtain effective combined wavefront; an error separation model is constructed based on the primary mirror compensator parameter and the Zernike aberration coefficient, and a primary mirror surface shape error component and a secondary mirror offset error component are decoupled and separated by using a preset aberration coupling coefficient; feeding the error component back to a polishing process and a displacement table for closed-loop iterative correction until the RMS value and the PV value of the effective combined wavefront meet a preset imaging quality index; through precise positioning, error correction and decoupling separation, the precision and efficiency of primary and secondary mirror combination detection are improved, and targeted correction is realized.

The invention relates to the field of mechanical engineering, in particular to an assembly error-based optical system imaging quality prediction method, which comprises the following steps of: firstly, constructing an accurate optical system finite element model, simulating a bolt tightening process, obtaining mirror surface deformation under the action of assembly stress, fitting a mirror surface shape by utilizing a Zernike polynomial, taking the mirror surface shape as an intermediate medium, and predicting the imaging quality of an optical system. The Zemax is adopted to simulate the imaging of the optical system under the conditions of mirror surface deformation and assembly poses, and the influence rule of various assembly errors on the imaging quality of the optical system is explored. Thirdly, an assembly data set is constructed through an integrated simulation method, an MLP-XGBoost combined neural network agent model is established, model training is carried out, and compared with a single MLP model, a single XGBoost model and a traditional regression model, the method has higher superiority and reliability in the prediction precision aspect. And finally, a stochastic gradient descent method is adopted to optimize the pre-tightening force under different primary and secondary mirror assembly pose conditions, the energy concentration ratio is averagely improved by 11.34% compared with the energy concentration ratio before optimization, and the assembly and adjustment efficiency and precision of the double-mirror optical system are improved.

The invention discloses a triangular support ring for supporting a secondary mirror, which comprises a secondary mirror triangular support ring, and the secondary mirror triangular support ring is provided with a support cylinder, a support cylinder gasket, a secondary mirror support ring, an outer light shield, a secondary mirror light shield, a secondary mirror flexible joint and a secondary mirror from top to bottom. The supporting cylinder is installed on the side wall of the secondary mirror supporting ring, and the supporting cylinder gasket is installed between the secondary mirror supporting ring and the supporting cylinder. The secondary mirror light shield is assembled at the other end of the secondary mirror supporting ring, the secondary mirror is assembled in the secondary mirror supporting ring, and the secondary mirror flexible joint is assembled between the secondary mirror supporting ring and the secondary mirror light shield; a mounting hole is formed in the joint of the supporting cylinder and the supporting cylinder gasket, a fastener is assembled in the mounting hole, and the secondary mirror flexible joint and the secondary mirror are connected through a clamping structure; the triangular supporting ring for supporting the secondary mirror is flexible in structural design form, easy to process, low in cost and convenient to install and adjust, and can better adapt to variable secondary mirror structures.

The invention relates to a three-waveband off-axis reflective optical system with view field switching and focusing functions. Belongs to the photoelectric technical field. Multi-band common-caliber imaging is realized by adopting an off-axis two-reflection-path form, imaging information can be continuously obtained day and night all day, laser emitting and receiving capabilities are considered, and the device has functions of positioning aiming, laser guiding and the like. Large and small field-of-view switching imaging is realized through switching-in and switching-out of the secondary mirror, and the system has the capability of carrying out rapid search in a large field-of-view range and carrying out accurate identification and tracking in a small field-of-view range; the auto-collimation focusing of the optical system is realized by switching the position of the focusing mirror and arranging the focusing system, the system is ensured to be clear in imaging under the use conditions of different atmospheric pressures, temperature changes and photographing distances, and the system is suitable for accurate aiming and detection of a target under various complex and severe working conditions. The total reflection optical system is free of chromatic aberration, free of blocking, compact in structure and high in system integration degree, and the requirement for functional diversification of a photoelectric system is met.

The invention relates to the technical field of optical-mechanical structures, in particular to a secondary mirror supporting structure and a common-aperture optical system mounting method applying the same, and the secondary mirror supporting structure comprises a secondary mirror bracket, a secondary mirror frame and a flexible hinge; on one hand, through the epoxy glue injection hole and the silicone rubber injection hole, the stability of the angle posture of the secondary mirror can be improved in a manner of jointly fixing the secondary mirror by using epoxy glue and silicone rubber; on the other hand, the flexible hinge is used for elastically supporting the secondary mirror, stress caused by difference of thermal expansion coefficients of the secondary mirror and the secondary mirror frame can be absorbed, the stability of the angle posture of the secondary mirror is further improved, and actual experiment requirements are met.

The invention provides an assembling and adjusting method of an off-axis free-form surface ray machine structure. The off-axis free-form surface ray machine structure comprises a main frame, a primary mirror and a secondary mirror (or a third mirror). The adjustment system comprises a CGH device and an interferometer. When an optical machine structure is designed and processed, a mounting reference surface and a positioning feature mark are processed on a main frame and an optical element in a high-precision processing mode. In the installation and adjustment process, the optical element is connected with the main frame through the installation reference surface, and coarse positioning installation is achieved; fine positioning and adjustment are carried out on the assembly body through the positioning feature marks; and finally, the light emitted by the interferometer sequentially passes through elements in a light path and returns to the interferometer to form interference fringes, and the pose of the secondary mirror (or the third mirror) is adjusted by taking the primary mirror as a reference until zero fringes are displayed on the interferometer. According to the method, corresponding structure reference transmission is considered during design of an optical machine structure, and rapid integrated assembly and adjustment of the off-axis free-form surface optical machine system are realized through positioning feature marking during assembly, so that the assembly and adjustment precision is high.

The invention relates to a common-aperture double-linear-array surveying and mapping camera optical system based on secondary mirror multiplexing, and belongs to the technical field of space remote sensing measurement. The optical system comprises two double-line-scan digital cameras which share the same aperture diaphragm and the same main reflector. According to the optical system, an integrated structure that the double-line-scan digital camera shares the primary mirror and a structure that the secondary mirror and the fourth mirror are coplanar and most of effective areas are overlapped are adopted at the same time, the double-line-scan digital camera is subjected to integrated structure design, the measurement precision regulation and control difficulty is reduced, and the surveying and mapping precision is improved; and a free-form surface is also introduced to realize coplanarity of the secondary mirror and the fourth mirror, so that two reflection areas of the coplanar reflector are overlapped, and the volume and the mass of the coplanar reflector are reduced. On the basis that three reflectors of the optical system are reduced, the focal plane is placed between the main reflector and the third reflector, light is overlapped on the premise that the image quality is not reduced, the size of the optical system is compressed, the space utilization rate of the system is improved, and the emission cost is reduced.

The invention belongs to an optical system, and provides a moving target measurement optical system and a measurement method, aiming at the technical problems that when the track of an aerial target is measured at present, only intersection measurement can be carried out, and distance measurement cannot be carried out by a single theodolite, so that measurement is inconvenient and calculation is complex. Comprising a main optical system, a laser ranging receiving correction lens group, a visible light collimating lens group, a visible light imaging lens group and a medium-wave infrared projection lens group. A laser ranging receiving light path, visible light measurement and infrared measurement common aperture structural form is adopted, single-station simultaneous angle measurement, ranging and temperature distribution measurement are achieved, and then single-station moving target track measurement is completed. Visible light imaging, medium-wave infrared capture measurement and laser ranging receiving share a primary mirror and a secondary mirror of the Cassegrain mirror group, high-resolution imaging, high-precision angle measurement and laser ranging are realized without parallax and optical axis sharing, and the requirements of long-focus high-definition imaging, long-distance high-precision angle measurement and long-distance ranging can be met at the same time.

The invention discloses a non-diffraction laser communication terminal based on Bessel beams. The terminal comprises a beacon transmitting module, an optical antenna module, a beacon receiving module, a signal transmitting module, a signal receiving module and a light splitting module. The beacon transmitting module and the signal transmitting module respectively convert the Gaussian beam into a Bessel beam through an axicon, and the Bessel beam is output through a collimating lens; a primary mirror and a secondary mirror of the optical antenna module are mounted in an off-axis manner, so that light beams are shrunk and expanded; the light splitting module completes light path switching and light splitting through a fast reflecting mirror, a 1 / 4 wave plate, a dichroscope and a polarizing beam splitter; the beacon receiving module obtains beacon light position information through a CMOS detector, and the signal receiving module receives signal light through an APD detector. The non-diffraction characteristic of the Bessel beam is utilized, and the off-axis optical antenna and the polarization beam splitting design are combined, so that high-precision and low-loss laser communication is realized.

The invention discloses a performance testing device and method for a fine tracking system based on coarse tracking error driving, and relates to the field of composite axis tracking control. Comprising a light source, an off-axis reflection type collimator, a target simulation fast reflecting mirror, a fine detector, a fine tracking fast reflecting mirror, a fine tracking controller, a coarse tracking platform dynamics simulation computer, a coarse tracking platform management unit, a collimator holder mechanism, a primary mirror and a secondary mirror. The method comprises the following steps: driving a target simulation fast reflecting mirror to move by using an error of a coarse tracking system, coupling a target to a fine tracking system through an off-axis reflective collimator, extracting by a fine detector to obtain a miss distance, and finishing image closed-loop control by using the miss distance fine tracking fast reflecting mirror. And meanwhile, the fine tracking system outputs the unloading amount to the coarse tracking simulation system to complete unloading of the coarse and fine two-stage system. According to the method, key function and performance verification of the fine tracking system can be completed in an environment without a real coarse tracking platform, the test cost is effectively saved, and practical engineering application is facilitated.

The invention discloses an optical zoom head-up display system which comprises a windshield and a zoom imaging system, and the zoom imaging system is composed of an imaging display unit, an optical zoom module, a secondary reflector and a main reflector. Light is emitted from the imaging display unit, is subjected to focal length modulation through the optical zoom module, and is reflected to the position of a driver eye box through the secondary reflector, the main reflector and the windshield in sequence, so that a virtual image with an adjustable imaging distance is formed. The optical zoom module realizes dynamic adjustment of focal length through an Alvarez free-form surface lens or a liquid lens, acquires distance information of a front vehicle in real time by combining with a vehicle-mounted sensor, and synchronously adjusts a virtual image display distance (continuously adjustable in 5-20m), so that a virtual image is attached to a background scene, and visual fatigue is reduced. The system adopts a compact design, the zoom function is concentrated in the optical module, volume expansion and adaptive vehicle-mounted space limitation caused by a traditional mechanical structure are avoided, and the driving safety and comfort are improved.

The utility model relates to the technical field of laser cutting, and provides a correlation type laser cutting device which comprises a first laser device and a second laser device, and the first laser device and the second laser device are arranged up and down in a spaced mode. The receiving end of the first galvanometer assembly is communicated with the transmitting end of the first laser; the receiving end of the second galvanometer assembly is communicated with the transmitting end of the second laser, and the emitting end of the second galvanometer assembly and the emitting end of the first galvanometer assembly are oppositely arranged in a staggered mode in the vertical direction. According to the correlation type laser cutting device, the first laser device and the second laser device are vertically arranged at intervals, cutting operation can be conducted at the same time, and therefore the cutting efficiency is remarkably improved. In addition, the emergent end of the second galvanometer assembly and the emergent end of the first galvanometer assembly are arranged in an up-down opposite staggered mode, and the interference phenomenon of laser beams in the focusing process is effectively avoided.

The present invention relates to a lidar system including: laser transmitter and receiver systems, the laser transmitter system including: a wavelength-tunable seed laser which emits pulses at selected wavelength points, and switches between wavelengths within a switching time of <200 ns; a fiber amplifier which amplifies the laser pulses up to 200 kW to a transmitter grating; and a transmitter telescope including primary and secondary mirrors. The laser beam is directed from the transmitter grating to the secondary then primary mirrors, and the first transmitter grating is imaged on the primary mirror to minimize laser beam wander thereon. The transmitter grating diffracts and steers the laser beam by wavelength to a surface, to an arbitrary subset of <2000 resolvable footprints along a cross-track direction at a beam pointing angle switching time of <200 ns, such that footprints illuminated by the laser beam on the surface are imaged in 3D.

The invention relates to a parabolic cylinder condensation type energy system for space. The parabolic cylinder condensation type energy system comprises a primary mirror, a secondary mirror, a solar cell and a heat dissipation assembly. The primary mirror is a paraboloid type concave reflector, and the secondary mirror is a hyperboloid type convex reflector; the area of the primary mirror is larger than that of the secondary mirror. A first coating is arranged on the concave surface of the primary mirror, a second coating is arranged outside the first coating, and a third coating is arranged on the convex surface of the primary mirror. The convex surface of the secondary mirror is opposite to the concave surface of the primary mirror. The solar cell faces the convex surface of the secondary mirror, and the secondary mirror can reflect the sunlight reflected by the primary mirror to the solar cell again. The heat dissipation assembly is located on the convex face of the primary mirror and the back face of the solar cell. Heat generated by the solar cell can be transmitted to the second plating layer arranged on the concave surface of the primary mirror and the third plating layer arranged on the convex surface of the primary mirror, and the second plating layer and the third plating layer carry out radiation heat dissipation through radiation, so that the concave surface and the convex surface of the primary mirror can realize radiation heat dissipation, the heat dissipation area is increased, and the heat dissipation efficiency of the solar cell is improved.

The invention relates to a coaxial four-mirror optical system, which comprises a primary mirror, a secondary mirror, a third mirror, a fourth mirror and an annular diaphragm, all the mirrors and the annular diaphragm are coaxially arranged, both the secondary mirror and the third mirror are provided with light through holes, light is reflected by the primary mirror and then is reflected by the secondary mirror, the third mirror and the fourth mirror in sequence, and the light is reflected by the annular diaphragm. And finally converging and imaging. In the design, through application of the annular diaphragm, edge aberration is reduced, and stray light suppression capability is remarkably enhanced at the same time. The coaxial four-mirror optical system has the advantages of being compact in structure, high in imaging quality, wide in applicability and the like, and is suitable for being applied to multiple fields of aerospace, biomedicine, industrial detection and the like.

The invention discloses an infrared four-waveband composite annular aperture folded imaging optical system, belongs to the technical field of optical catadioptric optical paths, and aims to solve the problem that 1550nm / 1064nm dual-laser and medium-wave / long-wave infrared four-waveband composite detection is difficult to realize at the same time in the conventional annular aperture imaging technology. The system comprises a primary mirror, a secondary mirror, a 1064nm laser spot correction mirror, a 1550nm laser spot correction mirror, a 1064nm laser spectroscope, a 1550nm laser spectroscope, a broadband infrared detector, a 1550nm laser detector and a 1064nm laser detector. And high-performance common-aperture composite detection of 1064nm / 1550nm dual laser and medium-wave / long-wave infrared four wavebands is realized through a multi-stage light splitting mechanism. The limitation that a traditional annular aperture system is single in wave band is broken through, and the all-weather sensing and target recognition capability of the system in a complex environment is remarkably improved.

The invention provides an optical integrated multiband on-line detection device, which belongs to the field of laser photoelectric system detection and is arranged at a laser output end of a laser photoelectric system. Comprising a reference unit, a beam shrinking unit, a near-field detection unit, a self-calibration unit, a far-field detection unit and an adjusting unit which are arranged in sequence, wherein the adjusting unit is connected with each unit; the reference unit comprises a reference window mirror with a cross wire; the beam shrinking unit comprises a primary mirror, a secondary mirror and a focusing mechanism for moving the secondary mirror which are sequentially arranged along a light path; the near-field detection unit comprises a near-field detector and a first spectroscope; the self-calibration unit comprises a self-calibration light source, a second spectroscope and a pyramid; the first spectroscope and the second spectroscope are sequentially arranged on a light path of a light beam output by the secondary mirror; the far-field detection unit comprises a far-field detector. According to the invention, the optical axis and pupil deviation of the laser beam relative to the reference can be rapidly and accurately tested.

The invention relates to a packaging structure of a micro display chip and a display device, and the packaging structure comprises a substrate, the surface of which comprises a display area and a non-display area; the electrode pads are located in the non-display area; and a plurality of through hole plugs located in the substrate, wherein one end of each through hole plug is electrically connected with the electrode pad. In AR near-to-eye display application, the light absorption structure can effectively absorb stray light returned from components such as an optical waveguide and the like, secondary specular reflection of the metal electrode pad on the non-display area is avoided, ghosting is prevented from being formed, and the imaging contrast ratio and the picture purity are remarkably improved. The light absorption structure is integrated in the packaging structure, and a stray light feedback path is cut off through a physical means on the premise that normal light emitting of a display area and electrical connection of an electrode pad are not affected, so that the optical performance of the micro-projection ray machine is improved, the final display effect is guaranteed, and the display effect is improved. Therefore, the technical problem of image quality degradation caused by high reflectivity of the non-display area is effectively solved.

The invention discloses a laser, visible and infrared portable composite target simulator which comprises a composite light source, a target, a card type optical system and a comprehensive control system. The composite light source adopts an integrating sphere structure, the integrating sphere is provided with a visible light source, an infrared radiation source and a laser fiber interface, the integrating sphere is also provided with an outlet, and the outlet can output a composite light beam; the cassette optical system comprises a secondary mirror and a primary mirror, and the target is arranged on a focal plane of the cassette optical system; the secondary mirror, the primary mirror, the target and the integrating sphere are coaxially arranged in sequence, and the composite light beam is emitted from an outlet of the integrating sphere, passes through the target and finally enters the cassette optical system; the comprehensive control system is connected with the integrating sphere through the visible light source, the infrared radiation source and the laser fiber interface, and is used for controlling the parameters of the laser, the visible light and the infrared radiation source. The device has basic functions of a specific wave band target simulator, can perform function verification on composite detection equipment, and is small in size, capable of being carried by one hand and good in portability.

The invention relates to the field of laser transmission and light beam control, in particular to a common-path aiming system and method based on a floating zero point. Comprising a laser transmitter, a tilting mirror, a spectroscope, a telescope secondary mirror, a telescope primary mirror, a laser receiving target, a cube-corner prism, a dichroic mirror, a first lens, a laser detection camera, a second lens, a target detection camera and a tilting mirror control unit. According to the invention, the imaging mass center in the laser detection camera is stabilized at the floating zero point, so that the emitted laser can accurately aim at the laser receiving target by using one tilting mirror, and the device has the advantages of simple structure and cost reduction.

A design method of an off-axis three-mirror free-form surface imaging system comprises the following steps: according to design values of performance parameters and structure parameters of an optical system, establishing an optical system initial structure consisting of a primary reflector, a secondary reflector and a third reflector as an initial state of iterative calculation of the optical system initial structure; the radiuses, the eccentricity and the inclination of the primary mirror, the secondary mirror and the third mirror are updated in sequence; the initial structure of the optical system meeting the threshold requirement is obtained by judging the evaluation function value MF of the initial structure of the optical system; and by taking the minimum wavefront difference of the optical system as an optimization target, optimizing the obtained initial structure of the optical system by using a damping least square method, and outputting a design result of the optimized optical system. According to the method, the process of repeated iteration adjustment according to the actual engineering space requirement in the conventional design method can be reduced, and the free-form surface off-axis three-mirror optical system meeting the actual engineering space requirement can be conveniently obtained.

The invention relates to an assembling method of an optical system, in particular to a precise assembling method of an off-axis three-mirror optical system, and solves the problems that an existing off-axis three-mirror optical system has non-rotational symmetry and optical axes of all components are not on the same axis, so that asymmetric wave aberration exists in the off-axis three-mirror optical system; and high-precision assembly cannot be realized. The precise assembly method of the off-axis three-mirror optical system comprises the following steps: 1) roughly positioning the primary mirror assembly, the secondary mirror assembly and the three-mirror assembly respectively until the angular deviation of each mirror group is less than or equal to 10 ''and the eccentric tolerance is less than or equal to 0.05 mm; the method comprises the steps of (1) analyzing the wave aberration of the off-axis three-mirror optical system and screening the freedom degree according to the wave aberration to carry out image quality correction, (3) calculating the misalignment amount M of a secondary mirror and a third mirror, and (4) precisely adjusting the angles of the secondary mirror and the third mirror according to the misalignment amount M to enable the full-view-field wave aberration of the off-axis three-mirror optical system to be smaller than a threshold value, and completing precise assembly of the off-axis three-mirror optical system.