95 results about "Active optics" patented technology

Optical devices having a dynamic aperture and / or an apodization mask are provided. The aperture and / or mask may be provided by one or more electro-active elements, and may be used in an ophthalmic device that that is spaced apart from but in optical communication with an intraocular lens, a corneal inlay, a corneal onlay, or a spectacle lens that provide an optical power.

Disclosed is a scanning device including: a photonic emitter assembly (PTX) to emit at least one pulse of inspection photons in accordance with at least one adjustable pulse parameter, a photonic reception and detection assembly (PRX) to receive reflected photons reflected back from an object, the PRX including a detector to detect in accordance with at least one adjustable detection parameter the reflected photons and produce a detected scene signal, and a closed loop controller to: (a) control the PTX and PRX, (b) receive the detected scene signal from the detector and (c) update said at least one pulse parameter and at least one detection parameter at least partially based on a work plan derived at least partially from the detected scene signal.

A system and method for tracking an airborne target including an illumination source (e.g., a diode laser array) is used to enhance a target signature and a detector (e.g., a passive high-speed camera) is used to detect to electromagnetic radiation (e.g., infrared radiation) reflected off the target. The received electromagnetic radiation may be processed by a digital computer and passed through a spatial filter that implements a band limited edge detection operation in the frequency domain. The filter may remove low spatial frequencies that attenuate soft edged clutter such as clouds and smoke as well as filter out artifacts and attenuated medium to high spatial frequencies to inhibit speckle noise from the detector as well as speckle from the laser return off the target.

An active optical zoom system changes the magnification (or effective focal length) of an optical imaging system by utilizing two or more active optics in a conventional optical system. The system can create relatively large changes in system magnification with very small changes in the focal lengths of individual active elements by leveraging the optical power of the conventional optical elements (e.g., passive lenses and mirrors) surrounding the active optics. The active optics serve primarily as variable focal-length lenses or mirrors, although adding other aberrations enables increased utility. The active optics can either be LC SLMs, used in a transmissive optical zoom system, or DMs, used in a reflective optical zoom system. By appropriately designing the optical system, the variable focal-length lenses or mirrors can provide the flexibility necessary to change the overall system focal length (i.e., effective focal length), and therefore magnification, that is normally accomplished with mechanical motion in conventional zoom lenses. The active optics can provide additional flexibility by allowing magnification to occur anywhere within the FOV of the system, not just on-axis as in a conventional system.

Optical devices having a dynamic aperture and / or an apodization mask are provided. The aperture and / or mask may be provided by one or more electro-active elements, and may be used in an ophthalmic device that that is spaced apart from but in optical communication with an intraocular lens, a corneal inlay, a corneal onlay, or a spectacle lens that provide an optical power.

Embodiments of the present invention automatically compensate control of an aircraft for an environmental condition, such as turbulence or wind shear. A sensor is configured to sense speed of air relative to an aircraft at a predetermined distance in front of the aircraft. A processor is coupled to receive the sensed speed of air from the sensor. The processor includes a first component configured to determine whether the speed of the air at the predetermined distance is indicative of an environmental condition, such as turbulence or wind shear. A second component is configured to automatically generate control signals for controlling the aircraft such that the environmental condition is automatically compensated by a time the aircraft enters the environmental condition.

The invention relates to the active optics phase conjugate method and the imaging device, the optical switch. It constructs the mode separation / integration convertor by the optical waveguide array which is set together at one end, the optics field couples with each other; it is set separately in the other end. It leads the optical wave into the separating optical waveguide by the separation / integration convertor, then to achieve the active optics phase conjugate by adjusting the phase and the swing. It can solves the imaging problem in many limit condition such as big size, high quality, super quick focal variation, long distance and so on. So it can be used in the field of the computer-human conversation, the robot optics, the integrate circuit photoetching, information storage, the military affairs, the energy source, the biology and the light communication network.

A system for automatically correcting flight path of an aircraft onto a predetermined trajectory is provided. A sensor is configured to sense speed and direction of air relative to the aircraft at a predetermined distance in front of the aircraft. A navigation system is configured to determine displacement of a flight path of the aircraft from a predetermined trajectory. A processor is coupled to receive the sensed speed and direction of air from the sensor and the displacement of the flight path from the navigation system. The processor includes a first component that is configured to determine whether the speed of the air at the predetermined distance is indicative of turbulence, and a second component that is configured to automatically generate control signals to correct the flight path of the aircraft from the displacement onto the predetermined trajectory by a time when the aircraft enters the turbulence.

A focus free camera module uses fixed lenses within a housing that are combined with an electrically controllable active optical element, such as a tunable liquid crystal lens. The fixed lenses provide a desired amount of optical power, but the manufacturing tolerances of the module are insufficient to ensure a proper focus of an image on an image sensor. The active optical element is therefore used to compensate for any variations in the optical power to achieve the desired focus. To ensure an effective compensation, the module may be constructed so that, when the variation in optical power due to manufacturing tolerances is at a maximum, the desired focus is achieved when the active optical element is at zero optical power. All other variations may then be compensated by adjusting the active optical element to increase its optical power.

The invention discloses a three-dimensional object European space reconstruction measurement system based on vision and active optics fusion. The system comprises a monocular vision module, a photometry range finding module, a preprocessing module, an initial three-dimensional reconstruction module, a SLAM posture calculating module, an accurate 3D reconstruction module and a correlation auxiliary mechanism. Through a new method, a mutual relation of an image sequence acquired from the monocular vision module and single point distance information acquired from a laser range finding module is established, space three-dimensional information of each characteristic point of an observed object is calculated, and through iteration optimization, accurate three-dimensional measurement information of the object and position attitude information of the object are finally acquired. Through adopting combination of a high speed Monocular vision system and a laser range finding system, based on high frame frequency detection, data processing pressure is greatly alleviated and the system is especially suitable for space or underwater motion object observation. The system possesses advantages that an imaging speed is rapid; reconstruction precision is high; and the system is simple, the size, weight and power consumption are small and so on. The system is suitable for applications of space and underwater operation robots.

A structured light projector meeting the variation ranges of high speed and high brightness comprises a programmable projection master control module, an input / output synchronous triggering module, an LED lighting module and an optical-mechanical system, wherein the programmable projection master control module is connected with a computer to receive the controlled information and video signals, so as to download structured light images with certain characteristics from the computer; one end of the input / output synchronous triggering module is connected with an external hardware, such as a camera, to receive and send synchronous signals, and the other end thereof is connected with the programmable projection master control module so as to send the external triggering information to the master control module; the LED lighting module is connected with the programmable projection master control module so as to receive the control information for adjusting the brightness and on-off of the LED chip; and the optical-mechanical system of the whole projector is used for completing the projection of the structured light images. The projector provided by the invention has the characteristics of compact structure, quick projection, high projection precision, and higher brightness variation range of the projection brightness, and is of significant value in various active optical measurement systems of structured light to be projected.

Embodiments of the present invention automatically compensate control of an aircraft for an environmental condition, such as turbulence or wind shear. A sensor is configured to sense speed of air relative to an aircraft at a predetermined distance in front of the aircraft. A processor is coupled to receive the sensed speed of air from the sensor. The processor includes a first component configured to determine whether the speed of the air at the predetermined distance is indicative of an environmental condition, such as turbulence or wind shear. A second component is configured to automatically generate control signals for controlling the aircraft such that the environmental condition is automatically compensated by a time the aircraft enters the environmental condition.

An optical device for illuminating the vasculature of a mammal using ultraviolet, visible, and / or infrared light is described. The optical device includes an optical fiber encased in a biocompatible sheath, and is dimensioned to lie within an intravascular catheter. When placed within a vascular space and coupled with a suitable light source the optical device illuminates the vascular space and its contents. The faces of the optical fiber are configured to optimize the capture of ultraviolet, visible, and / or infrared light from a light source without the use of active optics.

A compact, low profile splicing system for joining optical fibers produces durable, low transmission loss fusion splices. The system employs active optical techniques such as profile alignment or local injection and detection to achieve optimized alignment of the fibers prior to fusion. Light injected into one fiber is propagated across the interface to a second fiber. A detector senses the intensity of the injected light in the second fiber. After the relative position of the fibers is manipulated to maximize the transmitted intensity, the fibers are fusion spliced using an electric arc discharge. The accurate alignment achievable using the local injection and detection system to drive adaptive fiber positioning affords a method for reliably producing low loss splices. The present system is compact and low in profile, making it operable in cramped quarters with limited clearance to adjacent equipment and structures and with only a minimal amount of free fiber slack available. Simplicity of design and operation make the system rugged and enable accurate alignment and low loss fusion of fibers under adverse working conditions.

A wavefront sensor includes a plurality of lenses disposed in the same plane, and an area sensor that receives a bundle of rays of light collected through each of the lenses as a luminous point. Each of the lenses comprises a plurality of concentric areas with different focal lengths, and the area sensor is located substantially halfway between a first position in which a plane wave forms an image after passing through one of the concentric areas with a minimum focal length, and a second position in which the plane wave forms an image after passing through another area with a maximum focal length. With the wavefront sensor thus arranged, the measurement can be always achieved with high accuracy without involving noticeable blurring of luminous points on the area sensor regardless of the wavefront shape of a light beam incident to the lenses.

This invention discloses one source chemical current inductor, which comprises high voltage side signal process circuit 4, high voltage current source 9, high voltage current power 15 and coupler capacitor with non-metal cable 20 and low side signal process circuit 25, wherein, the circuit 4 adopts main and assistant power; the capacitor supply forms main power 9 and laser supply forms assistant power 15 at cooling status under control of side micro process system 24 output level.

Said method contains first setting electronic tachometer establish on one fixed baseplate and sticking target on post at specific intervals, before each measurement utilizing electronic tachometer to proceed once retest for determining initial position, sticking more than three targets on tested unit block and configuring in coordinate system, then respectively measuring following three items: actuator setting accuracy, papoose carrier and actuator reset quality after actuator up and down movement, papoose carrier and not lifting position relative amount of amount of turning after three actuator simultaneously rising certain of distance. The present invented method is simple and utility, solving testing and debugging technical matters for active optics astronomical telescope or radiotelescope neutron reflecting mirror module attitude control mechanism with active principal reflection surface.

The invention relates to a Hartmann sensor zooming collimation lens matched with pupils, and belongs to the field of adaptive optics, active optics and heavy caliber telescope wavefront detection. The Hartmann sensor zooming collimation lens matched with the pupils solves the technical problem that a Hartmann sensor collimation lens in the prior art cannot meet the requirement for quick and frequent switching. The Hartmann sensor zooming collimation lens matched with the pupils is composed of a zooming mirror set and a compensating mirror set. The zooming mirror set and the compensating mirror set are driven by a cam mechanism to move in the direction of an optical axis so that the focal length of the collimation lens can change continuously, and outgoing beams can be kept collimated all the time. The zooming mirror set and the compensating mirror set are respectively formed by one dual balsaming lens. The Hartmann sensor zooming collimation lens overcomes the defect that a fixed focal length of the Hartmann sensor collimation lens limits the uniqueness of sensor capability; an optical system which is simple and easy to adjust and corresponding mechanisms are used so that the focal length of the collimation lens can be switched to be adapted to wavefront detection on different conditions with different performance requirements.

The invention discloses a rare earth iron-doped transparent oxygen fluorine germanate microcrystalline glass and a preparation method thereof. The transparent microcrystalline glass comprises the following components by mole percentage: 38-60 percent of GeO2, 4-26 percent of Al2O3, 0-8 percent of Ga2O3, 15-40 percent of CaF2, 0-12 percent of MF, 0-6 percent of ErF3, 0-8 percent of YbF3 and 0-4 percent of PrF3, wherein M is one or more of Li+, Na+ and K+. The preparation method comprises the steps of pouring by melting method to obtain matrix glass and carrying out special thermal treatment on the matrix glass to obtain the microcrystalline glass containing CaF2 crystalline phase in nanometer level. The transparent oxygen fluorine germinate microcrystalline glass is environment-friendly, has stable physicochemical property and does not contain toxic Pb element, and has high transparency from visible area to near-infrared and intermediate infrared areas and excellent active optics property. The invention can be used in the field of optical communication, display, storage, and the like.

Methods and apparatus for acoustic to optical communications. In one example, a method includes performing active optical measurements of modulation-based surface deformations at a surface of a body of water using an active optical receiver to produce modulation data, the modulation-based surface deformations being representative of a modulation of a modulated acoustic signal originating beneath the surface of the body of water, between instances of performing the active optical measurements of the modulation-based surface deformations, optically measuring surface conditions of the body of water to produce channel information, and based on the modulation data and the channel information, recovering data encoded in the modulation of the modulated acoustic signal.

The embodiment of the invention discloses a wavefront sensing method, device, device and system for a large-view-field active optical telescope and a computer readable storage medium. The method comprises the following steps: calculating low-order wavefront information of each star point in a focal plane out-of-focus image of a telescope by utilizing a DOUNT rapid algorithm, wherein the out-of-focus image of the focal plane is acquired by an image sensor in a long exposure and initial out-of-focus amount state in the moving process of the edge of the field of view of the telescope; if the low-order wavefront aberration of each star point is discontinuous, generating a defocusing amount adjustment instruction according to a preset adjustment amplitude; when the detection telescope automatically increases the defocusing amount on the basis of the initial defocusing amount according to the adjustment amplitude, sending an instruction of re-collecting the out-of-focus image of the focal plane; and finally, obtaining wavefront information of the telescope according to the continuous focal plane out-of-focus image of the low-order wavefront aberration of each star point. According to the invention, the detection precision of telescope wavefront sensing can be effectively improved.

The invention discloses a BP neural network-based spliced telescope translation aberration detection technology, belongs to the technical field of active optics, and aims to solve the problems of highhardware cost, complex calculation and low efficiency of the conventional spliced telescope translation aberration detection technology. The method comprises the following steps: 1, establishing an accurate theoretical relational expression of a sidelobe module value and sub-mirror translation aberration; 2, constructing a BP neural network, and training an artificial neural network model of thedistorted far-field light intensity image and the sub-mirror translation aberration by using the established data set; 3, aiming at the specific spliced telescope system in the step 2, acquiring lightintensity image information of a point source observation target on a focal plane under the same broadband spectrum light source, and inputting the light intensity image information into a main control computer; and 4, enabling the main control computer to firstly perform Fourier transform on the focal plane image, extract a sidelobe module value corresponding to each sub-mirror of a Fourier transform function as the input of a network model, and directly output the translation aberration of each sub-mirror by using the BP neural network model constructed in the step 2.

The embodiment of the invention discloses a simulation method of an active optical system of an optical remote sensing camera, The active optical system simulation method integrates optical, mechanical and control disciplines, involving the optical structure of the camera, six-degree-of-freedom active optical actuator, wavefront sensing algorithm, correction algorithm and error term simulation model. Based on this simulation model, global optimization is easier to obtain the global optimal solution than single disciplinary optimization. The embodiment effectively solves the problem that the existing active optical simulation method adopts a single subject and an idealized model, which leads to large error and is difficult to simulate the actual active optical correction process.

The invention relates to a chalcogenide phase change film capable of being used for multispectral active optical regulation and a preparation method, and belongs to the field of optical films and optical phase change materials. The chemical formula of the phase change thin film is Sb<x>S<100-x>, wherein x is greater than 20 and less than 50. The amorphous high-quality optical thin film is preparedby adopting a high-vacuum rapid thermal deposition method. The film can be reversibly converted between a high refractive index (amorphous state) and a low refractive index (crystalline state) underthe thermal action of an external field. The crystalline state and the amorphous state of the material film can have obvious difference in refractive index within the range of 0.55-25 [mu]m, the lighttransmittance is good, the material film can be used for preparing a multispectral light field active regulation and control device, and the development requirements for integration, miniaturizationand multifunction of a traditional light field regulation and control device can be met.

The invention provides a method for realizing an active optical system of a field survey telescope. The method comprises steps that: an active optical control main server sends a gravitational deformation correction instruction to an industrial computer; the active optical control main server sends an instruction for measuring a collimation error of a main focus device to the industrial computer;the active optical control main server sends an instruction for performing a preliminary correction on the collimation error of the main focus device to a collimation control unit of the main focus device of the industrial computer, thereby performing active optical correction on a field survey telescope. The method is simple and efficient. After corrected by the active optical system, the axial positioning error is expected to reach 0.002 mm, the eccentric error is expected to be within 0.02 mm, and the tilt error is expected to be within 0.001 degrees after the main focus device is corrected. Without considering the influence of seeing, the wavefront error RMS is within 0.05, the overall image quality mean is controlled below 5 microns, and the image quality degradation is controlled within 5% after correcting the gravitational deformation and thermal deformation of a main mirror by the active optical system.

The invention discloses a method, a socket and a system used for guaranteeing safe power supply. The method comprises the steps that a light modulator sends a modulation signal to an optical transmitting tube; the optical transmitting tube receives the modulation signal and continuously sends out an active optical signal; an optical receiving tube receives an echo signal, wherein the echo signal is generated by reflecting the active optical signal by an optical high-reflection film arranged on a plug; the light modulator carries out demodulation on the received echo signal so as to acquire a demodulation signal; a recognition unit judges whether the demodulation signal is located in a predetermined strength range or not; and if the demodulation signal is located in the predetermined strength range and a relay is located at an off-state, the recognition unit indicates the relay to be connected, thereby being convenient for the socket to supply power stably. According to the invention, an insertion condition of the plug can be detected in real time, the relay can be conducted only when the plug is totally inserted in the socket, and the relay is cut off after a part of the plug is pulled out of the socket, thereby ensuring the safety of users, and avoiding an arc phenomenon generated when the plug is plugged in and pulled out.

The invention relates to a conformal concave infrared optical system with deformable mirror, which belongs to the technical field of optical instruments. The system contains a rotary and symmetrical non-spherical dome, an optical imaging system, an active optical element deforming mirror and a detector image face. The system adopts a special non-spherical dome that accords with hydrodynamic to achieve good hydrodynamic performances. Through the use of the active optical element deforming mirror, the asymmetric aberrations of the special non-spherical dome can be corrected and local concave images with high resolution can be formed on different visual fields. The system of the invention meets the performances of medium dynamics and has a simple structure; with reduced data transmission quantity of target image data, it can be widely used in the field of investigation and rescue.

The invention belongs to the technical field of optics, and relates to a fingerprint and vein double biological feature extraction optical imaging system which is capable of operating at a visible light waveband and a near-infrared waveband at the same time and adopts an active optical imaging mode, wherein a white light LED (Light-Emitting Diode) light source and a near-infrared LED light sourceare adopted to respectively perform surface-type lighting and lateral-transmission-type lighting on a to-be-detected object, then a fingerprint image and a vein image are acquired by the optical imaging system at the same time, and the fingerprint image and the vein image are received by a follow-up sensor after an infrared filter. The fingerprint and vein double biological feature extraction optical imaging system is based on a double gaussian structure, and adopts a coaxial transmission type structure, so that small-volume optical imaging is achieved through few optical lenses, in comparisonwith a conventional system, the volume is greatly reduced, thus the optical imaging system has the characteristic of simple and compact structure; in addition, focusing performances of the optical imaging system at various field positions of double wavebands are all close to a diffraction limit, thus the optical imaging system has the advantages of small distortion, high energy concentration rate, uniform image surface illumination distribution and so on; and extraction of double biological features consisting of fingerprint and vein can be completed at the same time, thus the optical imagingsystem also has the advantage of high security.