60 results about "Information optics" patented technology

An optical touchpad that may be able to provide accurate, reliable information about the position of an object in three-dimensions. The optical touchpad may enable a determination as to whether the object is engaged with the touchpad or hovering just above the touchpad. When the object is in contact with the optical touchpad, the optical touchpad may enable a determination of the force applied by the object to the optical touchpad. The optical touchpad may enable a determination of an object type of the object. These and other determinations of information related to the object may enhance the control provided by the touchpad system to the user as an electronic interface. The operation of the optical touchpad may further enable an enhanced frame rate, reduced optical noise in the optical signal(s) guided to the one or more sensors, augment the ruggedness of the optical touchpad, an enhanced form factor (e.g., thinner), and / or provide other advantages.

An image displaying apparatus displays a color image with favorable quality on a predetermined surface. A light source unit emits light beams within different wavelength ranges optically modulated by image information. A light combining unit combines light beams from the light source unit into a light beam. A scanning unit scans a scanned surface with the light beam from the light combining unit and forms an image thereon. A controlling unit synchronously controls the scanning unit and the light source unit. A dividing unit divides a light beam into more than one light beam within an arbitrary optical path on light-incident side of the scanning unit. A receiving unit and adjustment unit adjust quantity of light emission of one or more light source units based on the light quantity received by the receiving unit on one of the optical paths divided by the dividing unit.

The invention relates to an image-formation optical system that satisfies demands toward high performance and compactness at the same time, and an imaging system incorporating the same. The image-formation optical system comprises, in order from its object side, an aperture stop S, a first positive meniscus lens L1 convex on its object side, a second positive lens L2 having an aspheric surface and a third negative lens L3 having an aspheric surface, and satisfies the following condition.0.95<Σd / f<1.25  (1)Here Σd is the distance on an optical axis of the image-formation optical system from the object side-surface of the first positive meniscus lens to the image plane side-surface of the third negative lens, and f is the focal length of the image-formation optical system.

An apparatus for displaying images represented by electronic image information, that includes a light source and a reflective light modulator for optically modulating, with the image information, light from the light source to obtain a diffraction pattern that depends on the image information. An optical system is provided for converting the diffraction pattern into an image, and projection optics are provided for projecting the image obtained with the optical system. The optical system includes an array of schlieren bars and a focusing reflector.

There is provided a touch detecting device of a keyboard instrument, which makes it possible not only to enhance the mounting density of a plurality of optical sensors, but also to detect touch information of a key with high accuracy without being affected by light from the other optical sensors. The touch detecting device comprises a shutter 6 that moves in accordance with pivotal motion of a key 4, a plurality of optical sensors 7 and 8 that are provided close to a pivotal path of the shutter 6 and have respective light emitting parts 7a and 8a and respective light receiving parts 7b and 8b for receiving light emitted from the light emitting parts, on respective opposite sides of the pivotal path, and touch information detecting means 23 for detecting, as the key 4 pivotally moves, the touch information based on presence or absence of light received by the light receiving parts of the optical sensors 7 and 8 in accordance with opening or closing of optical paths of light from the light emitting parts of the optical sensors 7 and 8, by the shutter 6. Adjacent two of the optical sensors 7 and 8 are arranged such that the light emitting part of one of the two and the light receiving part of the other of the two disposed adjacent to each other on the same side of the pivotal path of the shutter 6.

A ranging apparatus capable of suppressing reduction of ranging accuracy at a long distance end of a distance measurement range, thereby making it possible to perform high-accuracy ranging over a wide distance range. An image pickup device receives light fluxes from a fixed focus optical system. A distance information acquisition unit acquires distance information of an object based on image signals from the image pickup device. This section acquires the distance information based on parallax between a first image based on a light flux having passed a first region of an exit pupil, and a second image based on a light flux having passed a second region of the exit pupil. The optical system is configured such that parallax of an object existing at a predetermined distance is smaller than parallax of an object existing at a shorter distance than the predetermined distance.

An optical identification element. The optical identification element is associated with an object and includes encoded or stored information associated with the object. The optical identification element includes an optical assembly that generates electrical power in response to incident light from a reader. The generated electrical power is used by the optical identification element to at least retrieve the data and then transmit the data back to the reader optically.

An optical storage apparatus, using the near field optical effect, performs tracking along a track of a recording medium to reproduce information recorded on the recording medium without error. The optical storage apparatus includes a first probe to read information recorded on the recording medium and at least two to judge if the track direction of the recording medium is in accordance with the information scanning direction of the first probe. The apparatus also includes a probe actuator to adjust the tracking direction of the first and second probes using a tracking control signal, and a number of sensors to sense the intensity of radiation probed by the first and second probes and to generate tracking signals corresponding to the sensed radiation. The apparatus also includes a controller to generate a tracking control signal using the tracking signals, and to provide the tracking control signal to the probe actuator.

The invention provides a real-time visual navigation system in orthopaedic minimally invasive surgery based on virtual-real fusion. The real-time visual navigation system based on virtual-real fusioncomprises an NDIPolaris optical tracking device, a virtual-real fusion device and a navigation device, wherein the NDIPolaris optical tracking device is used for acquiring six-degree-of-freedom pose information of a mark point in a real three-dimensional space; an optical tracking equipment bracket used for supporting optical tracking equipment (NDIPolaris) so that the optical tracking equipment is placed at a pointing position at any angle; a depth camera used for acquiring video data and video depth information in normal and lateral directions in an operation; a display used for displaying the poses of the tracked surgical instrument in the front side video, the side video and the three-dimensional virtual model in real time so as to realize visualization of the minimally invasive surgery; a video equipment bracket used for supporting the depth camera and the display equipment and fixing the depth camera and the display equipment at specified positions; and a video navigation calculation device is used for processing data acquired by the optical tracking equipment and the depth camera, calculating video navigation data and sending the video navigation data to the display.

A Bessel-Gaussian beam mask plate based on the Mittag-Leffler function uses the information optics principle and combines the Mittag-Leffler modulation function, the Bessel-Gaussian beam and the plane wave complex amplitude to obtain the interference light intensity graph to realize the interference recording process of the holographic principle. The interference light intensity graph is the mask plate designed for the invention. The invention has the beneficial effects that the invention provides the Bessel-Gaussian beam mask plate based on the Mittag-Leffler function, which can produce the pattern distribution of any number of optical flaps and has important application value in the fields of multi-particle capturing and the like.

An exposure method for an exposure apparatus that exposes a mask pattern onto a plate using a projection optical system includes the steps of obtaining information about flatness of a first mask, condition of an image plane when projecting a pattern of the first mask by using the projection optical system, information about a driving amount of a driving system, which can change an imaging condition on the plate based on the condition of the image plane, and information about flatness of a second mask, changing information about the driving amount by using information about flatness of the first and second masks, and driving the driving system based on changed information about the driving amount of the driving system to project a pattern of the second mask onto the plate using the projection optical system.

The invention belongs to the field of information optics and relates to a method for adjusting the self-collimation of an interference optical path in a holographic grating lithography system to solvethe poor parallelism of exposure beams when a parallel equidistant stripe holographic grating is fabricated. A volume Bragg grating is placed behind a collimating lens. The incident angle of the exposure beam emitted to the volume Bragg grating is equal to the Bragg angle of the volume Bragg grating. A photoelectric detector is placed on an -1 grade transmission diffraction optical path after theexposure beam is emitted to the volume Bragg grating. A pinhole filter is moved forwards and backwards along an optical axis to observe the readings of the photoelectric detector in real time. When the photoelectric detector has a maximum reading, the pinhole filter is fixed and the distance between a first pinhole filter and a first collimating lens is kept constant. The method for adjusting theself-collimating optical path detects the parallelism of self-collimated light by using the volume Bragg grating, substitutes for a traditional Moire fringe adjustment method, is easy to operate andhas a good practical value.

The present invention is to provide an optical access network in which a remote unit receives an optical burst signal. A central unit (OLT) transmits a DC-balanced optical continuous signal including packets having identification information for identifying each remote unit (ONU) to an optical switching module (OSM). The optical switching module (OSM) receives the DC-balanced optical continuous signal from the central unit (OLT), optically switches the packets based on the identification information, and transmits a DC-balanced optical burst signal including the packets to the remote unit (ONU). The remote unit (ONU) receives the DC-balanced optical burst signal and acquires the packets transmitted to the remote unit (ONU).

An integrated optical head records and reproduces information to and from optical discs of different types, including CD and DVD, with use of a single information recording / reproducing apparatus. The optical head has a plurality of semiconductor lasers of different wavelengths integrated by index alignment onto a substrate formed with an optoelectric integrated circuit, photodetection patterns, and a reflecting mirror.

A method in one embodiment includes acquiring optical image information with a detection unit configured to be operably coupled to a patient. The optical image information corresponds to microcirculation of the patient. The method also includes generating a microcirculation map of microvasculature of the patient using the optical image information. Further, the method includes generating a quantitative microcirculation index based on the microcirculation map, the quantitative microcirculation index corresponding to a condition of the patient.

Provided is a three dimensional information optics cryptosystem and a method. The three dimensional information optics cryptosystem comprises a set of encryption device and a set of deciphering device. Firstly, a structured light projection coded system is used for encoding the three dimensional information of the objects to be encrypted to a two-dimensional optical stripe image. And then, a double random phase encoding system is used for strengthening the security of the two-dimensional optical stripe image. The three dimensional information optics cryptosystem and the method are capable of effectively achieving the three dimensional information encryption of the objects and enlarging the size range of the encrypted objects.

Disclosed is a photonic orbital angular momentum spiral spectrum measurement system based on Fourier transform. The photonic orbital angular momentum spiral spectrum measurement system based on the Fourier transform relates to the technical field of information optics, and aims at solving the problem that existing spiral spectrum measurement methods are high in complexity and cost. According to the system, a light beam is divided into two lights by a first unpolarized beam splitter, one is transmission light, the other is reflected light, each light path is provided with a Dove prism, the transmission light and the reflected light are reflected by a total reflection mirror to reach a second unpolarized beam splitter, and phases of the transmission light and the reflected light are the samein the second unpolarized beam splitter; two interference lights output by the second unpolarized beam splitter are received by receiving end faces of two photodetectors respectively, and two intensity signals output by the photodetectors are transmitted to a synchronous signal processing system; an orbital angular momentum spiral spectrum is calculated by the synchronous signal processing systemaccording to the synchronously collected intensity signals. The system is applicable to spiral spectrum measurement of echo signals after target detection is performed by adopting the orbital angularmomentum light beam.

The invention discloses a spatial information transmission analyzing method of an optical system and belongs to the technical field of information optics and optical system imaging performance analysis. The spatial information transmission analyzing method includes the steps of 1), one-dimensional processing on a two-dimensional object matrix and image matrix; 2), structuring of a spatial channel matrix of a two-dimensional optical system; 3), computing of spatial information transmission performance parameters of the optical system. An analytical method of the information theory is applied to spatial imaging performance analysis of the optical system, so that information transmission rules of the optical system can be more objectively described. After one-dimensional processing of the two-dimensional object matrix and image matrix, the spatial channel matrix of the two-dimensional optical system is written out according to a point spread function (PSF) of the optical system as well as corresponding relation of object elements with image elements, the computation method of images is changed into product computation of object vectors and the spatial channel matrix of the two-dimensional optical system from the convolution computation of objects and the PSF, and the information theory can be applied to evaluation of spatial imaging performance of the optical system.

The invention provides a weak light speckle imaging recovery method based on a deep convolutional generative adversarial network. The method comprises the following steps: S1, obtaining a speckle PSF of a point light source; S2, obtaining speckles I of an unknown object; S3, performing image gray-scale adaptive nonlinear normalization on the speckle I of the unknown object and the speckle PSF of the point light source to obtain an image; S4, performing deconvolution operation on the normalized speckle of the unknown object according to the most approximate noise-to-signal ratio of a scatterer imaging system and the normalized speckle of the point light source to obtain a restored image Otem of the unknown object; and S5, inputting the unknown object recovery image Otem into a pre-trained deep convolutional generative adversarial network model to obtain a final unknown object reconstruction image O. A complete closed-loop speckle recovery imaging method can be constructed from information optics, adaptive optimization and deep learning, the ability of understanding convolution speckle imaging is enhanced, and generalization of deep learning in speckle imaging recovery is greatly improved.

The invention discloses a student workbook automatic scoring system. The student workbook automatic scoring system comprises a student workbook with a scoring module and a processing and analysis module, wherein the scoring module comprises a recognition area, an information area and a scoring area; and the processing and analysis module comprises a scanning input module, an image correcting and preprocessing module, an optical character recognition module and a summarization and feedback module, the scanning input module is used for generating image information of the scoring module, the image correcting and preprocessing module is used for correcting the size and offset of the image and acquiring image information of the scoring area, the optical character recognition module is used for converting the image information into character information, and the summarization and feedback module is used for summarizing the recognized data and acquiring a marking result with readability. The student workbook automatic scoring system solves a technical problem of the absence of a student workbook capable of automatically scored by using a machine and a scoring system used for marking the workbook in the prior art, and greatly reduces the consumption of manpower resources.

The invention belongs to the technical field of information optics, and discloses a near-field dual-key encryption method based on a metasurface, and the method comprises the steps: enabling the metasurface to serve as a public key, and enabling the phase distribution of incident light to serve as a private key; selecting the working wavelength of incident light, and optimizing the size parametersof the nano-brick, so that when the incident light under the working wavelength enters the nano-brick, the cross polarization conversion efficiency of the nano-brick is the highest, and the same-direction polarization conversion efficiency of the nano-brick is the lowest; calculating to obtain phase distribution information of the metasurface recording the public key image; determining directionangle arrangement information of a plurality of nano-bricks in the nano-brick array and arranging the nano-bricks on the substrate to complete the design of the public key; and calculating to obtain phase distribution information of incident light, and completing the design of the private key. The algorithm designed by the invention is simple, the degree of freedom of the design is higher, the security is extremely high, and the dual-key encryption mode is more flexible.

The invention discloses a method for detecting defects of a die-cut product, which comprises the following steps: obtaining original image information of a die-cutting product by using an optical work station, wherein the optical work station comprises an area-array camera, a telecentric lens and a light source unit which are arranged towards the die-cutting product, and the light source unit comprises a coaxial light source and an annular light source which are mutually switched; performing coarse positioning on the original image information, and performing gray processing to obtain a product area; precisely positioning and correcting the product area, and obtaining the precise product area; carrying out region segmentation on the precise product are according to a gray value to obtain sub-areas; and performing defect feature extraction on the sub-areas, performing defect marking on original image information, and counting the number of defects. According to the invention, the defect features in the obtained image information can be obvious, so that the detection stability is improved. In addition, the area where specific flaws need to be analyzed can be reduced, so that the detection efficiency is improved.

The invention belongs to the technical field of information optics, and relates to a holographic interference photoetching system. In order to solve the problem that the interference fringe drift holographic grating contrast ratio decreases, a first high-speed photoelectric detector is utilized to acquire a moire fringe light intensity signal on the surface of a reference grating, and transmit thelight intensity signal to a single chip computer and a PID controller at the same time; a second high-speed photoelectric detector monitors a light intensity signal of a laser through a light beam sampling grating, the light intensity signal is transmitted to the single chip computer, and a signal output end of the PID controller transmits to a frequency modulation input end of a first ultrasonicgenerator; and when the PID controller judges that the light intensity signal detected in real time by the first high-speed photoelectric detector changes, the PID controller outputs a feedback signal to the first ultrasonic generator, the frequency of the first ultrasonic generator changes correspondingly, the phase of the -1 level diffraction light of a first acoustic optical modulator changes,accordingly the phase of the moire fringe is locked, and locking of the interference fringe phase is achieved.

The invention relates to the technical field of image processing, in particular to an image-based distortion removal method, which comprises the following steps of: S1, acquiring a distorted image, and performing image feature extraction on the distorted image to obtain image feature information of the distorted image; s2, optical center calculation: firstly, obtaining a good distorted image by using a straight line cutting equal method, enabling image distortion to be approximately symmetrical about an image geometric center point, accurately obtaining a center coordinate of a dot on the edge of the distorted image by using an image processing technology, and taking a centroid coordinate in a dot region as the center coordinate of the dot; s3, solving an initial value of a distortion coefficient; s4, optimizing and solving a distortion coefficient; and S5, distorted graph reconstruction: in order to obtain a good corrected image, gray reconstruction, namely gray interpolation, must be carried out on the corrected image, the method is simple, convenient and practical and does not depend on internal parameters of a camera lens and a complex measuring device, and the corrected root-mean-square error and the gray reconstruction root-mean-square error both reach the sub-pixel level after correction.

An interchangeable lens that can be fitted to and removed from a camera body, includes: an optical characteristic storage unit that stores information relating to optical characteristics of the interchangeable lens, including at least information related to vignetting of the interchangeable lens; and an optical characteristic transmission unit that transmits to the camera body the information relating to optical characteristics stored in the optical characteristic storage unit. And with an image height corresponding to one sixth of an image height from a center of an approximately rectangular photographic field to any of four corners of the photographic field being termed Y1, the optical characteristic storage unit stores, as the information related to vignetting of the interchangeable lens, information specifying vignetting at positions for which image heights from the center are integral multiples of Y1 from 2 through 6 inclusive.

The invention discloses an X-ray optical framing imaging system that comprises a super-continuum spectrum generation module, a super-continuum spectrum broadening module, a probe light action module and an optical framing recording module, wherein the super-continuum spectrum generation module can convert short-pulse laser into super-continuum spectrum probe light; the super-continuum spectrum broadening module can convert the super-continuum spectrum probe light into chirped pulse probe light; the probe light action module can enable chirped pulse probe light to carry space-time evolution process information of X-rays generated by interaction of targeting laser and a target material, and the optical framing recording module can spatially divide one beam of chirped pulse probe light into aplurality of beams and record the beams of chirped pulse probe light as a plurality of two-dimensional images with time intervals. By adopting the technical scheme, the invention can be used for measuring the X-ray space-time evolution process under the conditions of an extremely small space and an extremely short time scale, and serves the research of a high-energy density related physical process.

The invention discloses a multi-spectral and multi-receiver target image information optical processing system capable of superposing and displaying graphic and text information. An optical imaging system of the multi-spectral and multi-receiver target image information optical processing system comprises a prism system, the prism system comprises a three-piece object lens (1), a roof prism (2) and an isosceles prism, and three prisms are adhered with one another to form the isosceles prism. The multi-spectral and multi-receiver target image information optical processing system has the advantages that the potentiality of the optical imaging system can be played to the greatest extent, so that large quantities of tasks can be executed, and a product has multiple functions.

A ranging apparatus capable of suppressing reduction of ranging accuracy at a long distance end of a distance measurement range, thereby making it possible to perform high-accuracy ranging over a wide distance range. An image pickup device receives light fluxes from a fixed focus optical system. A distance information acquisition unit acquires distance information of an object based on image signals from the image pickup device. This section acquires the distance information based on parallax between a first image based on a light flux having passed a first region of an exit pupil, and a second image based on a light flux having passed a second region of the exit pupil. The optical system is configured such that parallax of an object existing at a predetermined distance is smaller than parallax of an object existing at a shorter distance than the predetermined distance.

A deterioration of reproduction light is occurred by a laser drive current on which a high-frequency current is superimposed. The present invention, for example, is an optical information reproducing apparatus which irradiates a laser beam to an optical disc 1 and reads an information, the optical information reproducing apparatus includes a semiconductor laser 6 which generates the laser beam, a laser drive unit 7 which supplies a drive current on which a high-frequency current are superimposed to the semiconductor laser 6, a spindle motor 2 which drives the optical disc 1 and a control unit 5 which controls the laser drive unit 7 and the spindle motor 2, and the control unit 5 determines a parameter of the high-frequency current based on magnitude of a current on which the high-frequency current is to be superimposed.