209 results about "Optical telescope" patented technology

A dual-band antenna is provided that combines two normally disparate communications modes into a single compact aperture minimizing overall mass and volume, while maintaining high performance efficiency and reciprocity of each individual mode. The antenna is compatible with both optical (near-IR / visible) and RF (microwave / millimeter-wave) transceiver subsystems for high bandwidth communications, applicable primarily to long- to extremely long-range (space-to-ground) link distances. The optical link provides high bandwidth while the RF provides a lower data-rate weather backup, accommodation for traditional navigation techniques, and assistance in cueing the extremely tight optical beam by matching the RF beamwidth to an optical fine-steering mechanism field-of-regard. The configuration is built around a near-diffraction-limited high performance primary mirror shared by both a direct-fed RF antenna design and a Cassegrain optical telescope. Material properties are exploited to combine the optical secondary mirror with the RF feed structure, providing a collimated optical beam interface at the antenna vertex.

The invention discloses a multi-wavelength high-sensitivity online monitor of multi-component NH3 and H2O based on semiconductor laser absorption spectroscopy. It contains host chassis and open long-path system. Equip power receptacle, switch, fiber connector and data transmission interface. It is characterized in that: there are near-infrared semiconductor laser, semiconductor laser controller, phase-locked amplifier, signal generator, data collecting and controlling module and infrared detector in host chassis which is connected with field optical system by fiber. Open optical system contains send-receive optical telescope and multielement reflector array. Optical telescope has input and output fiber couplers. The device realizes simultaneous testing of gas multi-component by using multi-wavelength and frequency division multi-signal detecting technique.

An acquisition, pointing, and tracking (ATP) apparatus for free space optical (FSO) communications systems incorporates a multi-element detector array positioned at a focal plane of an optical telescope. An optical communications element lies at the center of the detector array. In lieu of traditional beam steering, the apparatus performs pointing and tracking functions internally by first calculating a position of an optical maximum on the detector array, and then translating the detector array within the focal plane of the telescope such that the optical communications element lies at the optical maximum for transmitting and / or receiving optical communications signals.

A machine for detecting sulfur hexafluoride (SF6) leaks using the mid-infrared differential absorption lidar (DIAL) technique with a commercically available, air-cooled, compact, pulsed transversely-excited-atmospheric (TEA) carbon dioxide (CO.sub.2) laser, a Cassegranian optical telescope for focusing both the laser emission and returning reflected signal, a user-operated focusing mechanism, a two-dimensional, thermoelectrically-cooled focal plane array (FPA) sensitive in the mid-infrared wavelength range (10.2-10.6 micrometers), a charge-coupled device (CCD) for 2-D imaging, a computer-based control system to rapidly switch the laser wavelength between 10.2470 micrometers, 10.7415 micrometers, and 10.5518 micrometers to utilize the Differential Absorption Lidar (DIAL) chemical detection technique, a rechargeable battery pack and power supply, and an image and data storage device using a solid-state memory stick.

An open natural gas leakage multiplex inspecting method and optical channel configuration, based on semiconductor laser absorbing spectrum method, relates to master case and open long optical channel system. The master case sets with electrical source socket, switch, fan, optical fiber linker and data transmission interface. The master case owns closed infrared semiconductor laser, semiconductor laser controller, phase-locked amplifier,signal generator,data collection disposal and control module, light switch, light switch driving circuit and infrared detector and connects with the locale optics system by optical fiber. Open optical system relates to integral optics telescope and more component angle reflector array and the former owns import optical fiber coupling implement and output optical fiber coupling implement. It achieves the time-sharing inspect of more gas component and more multiplex based on optical fiber distributing configuration of the light switch technology.

The invention discloses an all-fiber direct detection anemometric laser radar system and a closed-loop control method thereof. The system comprises an optical emission part, a frequency locking part, an emission part and a receiving part, wherein the optical emission part is used for emitting a modulated and amplified laser pulse; the frequency locking part is used for detecting the laser frequency variation, feeding back to the laser emission part, adjusting the laser wavelength and further realizing the function of locking the laser wavelength according to the deviation; the emission part is used for enabling the laser beam to point to the detection zone of the atmosphere, coupling the atmospheric back scattered light to a receiver through an optical telescope and modulating the near field signal strength; the receiving part is used for filtering out sun background from a signal and dividing the signal into two paths, one path of signal passes through a Fabry-Perot interferometer, the other path of signal is used as energy reference, the transmittance is obtained through the ratio of the signal intensities of the two paths of signal, and the wind velocity is obtained through inversion according to Doppler frequency shift. The laser radar adopts an all-fiber structure and has the advantages of small size and light weight, the manufacturing cost of the radar is low, the laser radar is controlled through a 3-level closed-loop, and the environmental adaptability and working stability of the laser radar are improved.

A synoptic, broad-area remote-sensing system using multiple sensors mounted on an airborne platform. Commercially available optical telescopes can be used as the sensors and can be mounted to the platform with fixed location and orientation to collectively view a wide strip of land. Each telescope views a generally linear coverage area which overlaps an adjacent coverage area of another telescope. The images from the coverage areas of the multiple telescopes are stitched in electronic image processing into continuous strips of high-acuity image data. Calibration, distortion correction, alignment and the like are carried out in the electronic image processing using proven, commercially available hardware and software. The image detection for each telescope can be implemented using a linear arrangement of multiple, overlapping linear detectors to yield a wide, high-acuity, virtual field-of-view. The linear detectors can be commercially available detectors with multi-spectral capabilities. A system with large-area synoptic coverage can thus be implemented using low cost, commodity optics and detectors in combination with commercially available image processing hardware and software.

The invention discloses a satellite-to-ground quantum communication system compatible with classic laser communication. When completing the establishing of a communication link with a ground terminal and carrying out satellite-to-ground quantum communication, the system used as a satellite load can perform satellite-to-ground classic laser communication with the same ground terminal at the same time. The invention also discloses a device for realizing satellite-to-ground quantum communication and laser communication simultaneously. The device comprises an optical telescope, a rough tracking turntable, a fine tracking quick pointing mirror, a color separation film, a quantum communication narrow bandpass filter, a quantum communication module, a splitting prism, a fine tracking camera, a laser communication narrow bandpass filter and a laser communication module; based on a wavelength difference between single photons for quantum communication and signal light for classic laser communication, the color separation mirror is used for performing special separation on the single photons and the signal light so as to design a reasonable and feasible light-machine structure; and thus, satellite-to-ground quantum communication and laser communication can be realized simultaneously by using one set of optical transmit-receive system and tracking and scanning system.

The invention discloses a dispersive polarized micropulse laser light radar control method and device, inputting polarized laser light emitted by a small-scale semiconductor pumping YAG frequency doubling polarizing laser as working into a beam expander for expanding, then sending the laser to the sky, where the laser is dispersed by aerosol in the atmosphere, the backward dispersed light of spherical particles in the aerosol will not change the polarizing direction of the laser light and that of nonspherical particles will change the polarizing direction of the laser light to form a component vertical to the polarizing direction of the original laser light (i.e. depolarized). The backward dispersive echo signals coming from the spherical and nonspherical particles are received by an optical telescope and two lights of different polarizing directions are separated by a light separating prism and sent to two detectors, respectively; a photon counter card makes contraposition counting and accumulation processing in the time sequence of photoelectric pulse signal returning from the space, and the processed result is stored into corresponding data memory cells; two signals collected are calculated by XJ-PMPL software to obtain echo depolarization degree, thus obtaining space distribution outline of nonspherical particles. Besides, it can also combine the two signals to obtain the total strength distribution of backward dispersed light, therefore the polarized micropulse laser light radar can also complete the functions of a general micropulse radar.

The invention discloses a three-dimensional direction angle measuring device and method using celestial body position as alignment calibration reference. The device is composed of a celestial body sensor, an optical telescope, an azimuth pitch axis frame, a plurality of sensors, a controller and a base. The optical telescope is arranged on the pitch axis of the azimuth pitch axis frame; the celestial body sensor is installed above the lens cone of the optical telescope or on the spindle nose of the pitch axis; and the principal optic axis of the celestial body sensor is parallel to that of the lens cone of the optical telescope. Because the celestial body sensor can sense the positions of fixed stars and planets in the sky, the positions of fixed stars and planets can be used as the calibration reference for spatial measurement to provide three-dimensional high precision angle of direction, so as to further improve the accuracy of the space angle of direction of three-dimensional directional instrument. At the same time, high precision directing of horizontal reference surface, tilt datum plane, due east, due south, due west, due north and vertical direction, and the accuracy of the angle of direction reaches the level of arc second even sub arc second.

This invention discloses dual field view dual-wavelength laser radar scattering meters structure and detection methods, including laser launch unit echo signal receiver modules, the follow-up optical modules, signal detection and acquisition module and control unit; The laser launch unit using Nd: YAG laser, launching 532 nm and 1064 nm wavelength of the laser pulse at the same time and received by the diameters of 400 mm and 200 mm telescope. Two receiving optical telescope module are follow-up optical module. Optical signal from the follow-up optical module are received by the detection and acquisition module and control unit. atmospheric aerosol extinction coefficient of the vertical profile and continuous distribution, and extinction coefficient level of continuous distribution, can be analyzed through the various atmospheric aerosol optical parameters.

A large, low cost and high quality optical telescope system (1) includes a segmented primary mirror (2) having a plurality of spherical mirror segments (3) arranged in a non-spherical shape (4), a parabolic shape in the disclosed embodiment, so that the rays incident upon the individual spherical mirror segments stay separated at an exit pupil (5) of the system, allowing for correction of aberrations. A discontinuous pupil corrector in the form of a segmented mirror (7) having a plurality of aspheric correction terms in it, is located at the exit pupil for correction of aberrations introduced from respective ones of the plurality of spherical mirror segments of the primary mirror. The discontinuous pupil corrector preferably is a segmented deformable mirror. The telescope system and related method can achieve diffraction limited performance for very large systems. The disclosed embodiment is a 35 meter aperture, deployable space telescope system. Inexpensive replication techniques can be used for making the spherical primary mirror segments.

A low orbit optical imaging satellite has a long thin satellite body housing an optical telescope arrangement. A major part of the telescope arrangement has its optical axis roughly parallel to the direction of elongation and includes a mirror arrangement deployed to direct a line of sight of the optical telescope out sideways from the direction of elongation. The transverse dimensions of the satellite body are preferably minimized to be close to the optical aperture dimension of the optical telescope, thereby providing a high ballistic coefficient and high orbit lifetime for orbits in the low thermosphere.

An RF / Optical shared aperture is capable of transmitting and receiving optical signals and RF signals simultaneously. This technology enables compact wide bandwidth communications systems with 100% availability in clear air turbulence, rain and fog. The functions of an optical telescope and an RF reflector antenna are combined into a single compact package by installing an RF feed at either of the focal points of a modified Gregorian telescope.

The present invention relates to an optical device for both a dot sight mode and a scope mode, the optical device including: a dot-sight main body which is formed with a dot sight region where a light source and a reflective mirror are installed to display light emitted from the light source as a dot on an external target, and operates in the dot sight mode; and a scope structure which includes an objective lens and an eyepiece lens to magnify and see the external target, and is rotatable inside the dot-sight main body, the scope mode being selected when the scope structure is rotated and inserted in the dot sight region. With this, there is provided an optical device for both a dot sight mode and a scope mode, in which a scope structure is installed to be retractable inside a dot sight device and thus both the dot sight mode and the scope mode are supported, thereby aiming at an external target through quick mode switching, and there is no need for an additional scope device.

The invention discloses a static Fourier transform interference imaging spectrum full-polarization detector, which comprises a fronting optical telescope system, a static all-optical modulation module, a static Fourier transform interference imaging spectrometer, an imaging lens group, an area-array detector which are arranged in sequence along the light transmission direction, wherein the area-array detector is connected with a signal acquiring and processing system; light emitted by a target source is collimated by the fronting optical system, and then is modulated by the static all-optical modulation module; after the modulated transmission light passes through the static Fourier transform interference imaging spectrometer, emergent light is changed into two beams of coherent light; the two beams of light pass through the imaging lens group and then are convergent on the area-array detector for imaging and interference; and a signal received by the area-array detector is sent to the signal acquiring and processing system for processing. The static Fourier transform interference imaging spectrum full-polarization detector has the characteristics of simple and compact structure, no moving parts, high luminous flux, and acquisition of target two-dimensional spacial images, one-dimensional spectral information and complete polarization information at one time.

The high-resolution adaptive imaging optical telescope comprises: a telescope system, a precise track system with EMCCD (reading noise < 1e-) as the core detective member, an adaptive optical system, and an imaging system, wherein the precise track and detection system is arranged in Kuder room to keep all of the track system and track loop and high-order error correction loop on one OA; the Hartmann sensor works on near-IR range to reduce background effect, and the near-IR detector in imaging system can overcome effect from strong back light and air turbulence to improve imaging resolution.

A multi-aperture interferometric optical system collects light propagating from a source of light and develops overlapping diffraction patterns on an optical detector that produces output signals for processing to automatically focus the optical system and form an image corresponding to the diffraction patterns. A preferred embodiment of the invention is a large aperture orbiting, earth-watching ring interferometric optical system configured such that there is no macro-structure pointing. Four mirror-ring structures direct incoming light to a multi-spectral primary optical detector that acquires light-pattern information to focus the optical system and derive an image.

An optical telescope system, method of actively, adaptively providing optical control to an array of articulated mirrors in a sparse aperture in the optical telescope system and a computer program product therefor. Array apertures are selected sequentially for imaging. Each aperture is temporally modulating at a unique / different frequency and, simultaneously, focal plane images are detected for each array aperture with known and separable temporal dependencies. The images are processed for the current set of said focal plane images to detect an image wavefront. The feeding back wavefront errors are fed back to aperture actuators for controlling the array.

An all-day multifunctional telescope device capable of being both used for solar active region observation and night astronomical observation comprises an optical telescope system, a lightweight cellular main lens and temperature control system, a thermovision field diaphragm and temperature control system, a thermovision field diaphragm adjusting structure, an achromatic imaging system, a light filter, a rotating rack and a data processing and control system. According to the all-day multifunctional telescope device capable of being both used for solar active region observation and night astronomical observation, under the condition that cost and system complexity are not obviously increased, the effective observation time of the telescope device is changed to achieve daytime and night continuous observation from only daytime or night observation, the effective observation time is effectively prolonged, the observation efficiency is improved, important reference is provided for development of telescopes, in particular to development of large-diameter telescopes, and the innovativeness and practicability are achieved.

The invention is a photoelectric detection method for a satellite fault in a geostationary transfer orbit. The method comprises: acquiring a light curve of the satellite in the geostationary transfer orbit by an optical telescope detection system; obtaining an OCS value of a target through analyzing a phase angle sequence light characteristic curve, to evaluate the unfolding state of a solar panel of the satellite; obtaining an angular spin rate of the target through analyzing a time sequence light characteristic curve, to evaluate satellite platform attitude control capacity; and evaluating satellite platform attitude regulation and control capacity through accumulating multi-circle satellite phase angle sequence light characteristic curve, so as to evaluate satellite fault state and provide possibility of rescuing the satellite in time. The method does not depend on a sensor and downlink communication data of the satellite system, and has the property of passive receiving, and characteristics of high sensitivity, high precision, long detection distance, capability of observing in real time, quick data processing and so on.

The present invention provides an inexpensive, simple, compact, optical relay for use primarily with scanning beam imaging systems. More specifically, it can be used as an optical interconnect between scanning mirrors and between a scanning mirror and imaging optics such as a microscope objective. The optical relay, also known as an optical telescope or coupler, consists of two eyepieces forming an afocal assembly. A beam pivoting about a stationary point in the first focal plane of the first eyepiece will be relayed through the optical system such that it pivots about a stationary point at the second focal plane of the second eyepiece. In the preferred embodiment a collimated beam pivots about the first focal point of the first eyepiece as it enters the optical relay, and exits the optical relay with the same beam diameter and scan angle (opposite sign) pivoting about the second focal point of the second eyepiece.

The invention belongs to the field of foundation photoelectric observation and discloses a space object dimension acquisition method based on photoelectric observation. The method includes the steps of obtaining high-precision photometric information of a space object through observation; obtaining photometric calibration parameters through orbital calculation; performing photometric correction on the space object; calculating the dimension of the space object. The space object dimension acquisition method based on photoelectric observation overcomes the lack of observational capability on middle-orbit and high-orbit space objects in a radar method and is a method for acquiring the optical dimension of the middle-orbit and high-orbit space objects with an optical telescope system by obtaining the parameters of the optical scattering cross section indicating the dimension of the space object. Compared with a wireless method, the space object dimension acquisition method based on photoelectric observation can accurately obtain the dimension of the space object due to the fact that an optical band is longer than a radio band and not sensitive to edges and corners. The space object dimension acquisition method based on photoelectric observation can be rapidly popularized and applied to existing foundation photoelectric detection devices in China without hardware modification to form a certain capability of determining the dimension of the space object.

The invention relates to a passive radial supporting mechanism for a primary mirror of an optical telescope based on kinetic equilibrium. One end of a first-stage connecting rod of the mechanism is hinged with the rim of a primary mirror chamber, and the other end of the first-stage connecting rod is hinged with a second-stage connecting rod and a third-stage connecting rod at the same time; the other end of the second-stage connecting rod and the other end of the third-stage connecting rod are hinged with the rim of the primary mirror; and an included angle theta is formed between the second-stage connecting rod and the third-stage connecting rod. By a kinetic equilibrium system, the radial direction of the primary mirror is not restrained by an over-restraining characteristic, so that a stable equilibrium state is realized; when temperature is changed, the whole radial supporting system does micro motion in accord with a kinetic rule by using the change of the geometric size caused by thermal deformation of a connecting rod mechanism, so that stress caused by the thermal deformation among the primary mirror, the radial supporting mechanism and the primary mirror chamber is counteracted; therefore, the passive radial supporting mechanism is suitable for supporting primary mirrors made of materials with large thermal expansion coefficients and primary mirrors working under a relatively severe working environment.

The direction of a solar light tracking sensor is set easily with high accuracy. A solar light tracking guide (35) is installed on the optical axis (11) of the reflected light collected by a heliostat (2). An optical telescope (47) is so attached to the rear end part of the guide (35) as to be aligned with the guide axis (C) of the guide (35). The posture of the solar light tracking guide (35) is so adjusted that a cross provided in the field of view of the telescope (47) agrees with the center (10a) of the light collection target position and fixed to the base (38). Then, a solar light tracking sensor (12) is fastened to the rear end part of the guide (35) in place of the optical telescope (47).

A lens focal plane array heterodyne reception optical antenna of a synthetic aperture laser imaging radar is composed of a reception aperture diagram, a reception lens, a polarization beam combination lens, a local oscillator beam, a wave plate, a polarization beam division lens, two detection diagrams, two photoelectric detection arrays, a balance reception array circuit and a summator circuit; the aperture diagram is positioned on the front focal plane of the reception lens; the photoelectric detection arrays are positioned on the back focal plane of the reception lens; the balance reception array circuit carries out balance reception treatment on the output electronic signals of the two photoelectric detection arrays; the summator circuit carries out linear addition on the array output electronic signals of the balance reception array circuit. The invention can realize a receiving field of view much larger than that of heterodyne decided by the optical antenna caliber diffraction and the caliber a lot larger than that of a transmission optical antenna, can be combined with a transmission optical telescope with relatively smaller caliber to be a co-axial synthetic aperture laser imaging radar optical antenna system.

A laser spot tracker device comprising a laser tracker receiver using a quadrant detector incorporated into a pair of binoculars or optical telescope system with a crosshair or reticule. Directional information from the laser tracker receiver is displayed to an operator (JTAC) to allow the reticule to be manually steered on to the target illuminated by the laser, thus identifying the target to the spotter. The laser code may be pre-selected to track a particular designator, or, the tracker may read out the code or codes of laser spots within its field of view.

The invention discloses a rotating furnace molten steel temperature measurement device which comprises an optical telescope, a light-filtering device, a photoelectric conversion unit and a processor, wherein the optical telescope is connected with the light-filtering device and used for sending the obtained spectral information into the light-filtering device for filtering so as to obtain the filtered spectral information; the light-filtering device is connected with the photoelectric conversion unit and used for sending the filtered spectral information into the photoelectric conversion unit and converting the filtered spectral information into an electrical signal; and the photoelectric conversion unit is connected with the processor and used for sending the electrical signal into the processor for computing so as to obtain the rotating furnace molten steel temperature information corresponding to the electrical signal. According to the rotating furnace molten steel temperature measurement device, the optical telescope is used for acquiring the spectral information of the flame at a furnace mouth from a long distance in real time, and the light intensity value corresponding to the spectral information can be obtained according to the spectral information, so that the severe high temperature environment of the furnace mouth can be avoided, the service life of the device is prolonged, the device is convenient to install and maintain and is not limited by the size of a rotating furnace, and the cost is effectively reduced.