157 results about "Integral imaging" patented technology

A radiation therapy system optimized for treating extremities such as the breast has unique geometrical features that enable the system to deliver an accurately located prescribed dose to a target volume while eliminating or reducing the collateral dose delivered to the rest of the patient. An optional integral imaging system provides accurate target volume localization for each treatment session. Utilizing the effects of gravity on a prone patient maximizes the separation of a target volume within the breast to adjacent critical structures such as the chest wall, heart and lungs, thereby reducing long term complications not associated with the primary disease. A shielded interface surface between the radiation source and the patient reduces patient dose due to scattered or stray radiation. A shielded enclosure for the radiation sources combined with the shielded interface surface eliminates the need for primary shielding in the room and allows the therapy system to be used in a transportable, mobile facility.

A three-dimensional (3-D) display system using a variable focal length lens includes at least one two-dimensional (2-D) display device, configured to display at least one two-dimensional image. The display system also includes an array of micromirror array lenses optically coupled to the display device, each micromirror array lens of the array of micromirror array lenses placed at a different location with respect to the display device, configured to focus the at least one two-dimensional image from each different location to provide a three-dimensional (3-D) image. The advantages of the present invention include increased viewing angles and wide depth range of three-dimensional images.

The invention which relates to an optical instrument and detection imaging technique discloses a large field depth iris image acquisition system and a method based on a plurality of fixed-focus cameras. The system comprises an iris image collecting device and an image recognition device. The method comprises the following steps: respectively imaging the iris by means of the fixed-focus cameras having different imaging object distance ranges and producing a multi-path fixed-focus image results; choosing one or a plurality of multi-path fixed-focus image results through distance measurement or image quality evaluation method; carrying out image processing and identification of chosen qualified iris image data. The invention effectively integrates the imaging ranges of different fixed-focus cameras in the mode of self-adapting switchover, thereby taking advantages of the cameras and at same time removing disadvantages of the cameras, enlarging the integral imaging range of the acquisition system, and improving the feasibility of an iris recognition system. Compared with the prior iris imaging method adopting a zoom camera, the invention has the advantages of low cost, quick and noiseless focusing.

A method for three-dimensional reconstruction of a three-dimensional scene and target object recognition may include acquiring a plurality of elemental images of a three-dimensional scene through a microlens array; generating a reconstructed display plane based on the plurality of elemental images using three-dimensional volumetric computational integral imaging; and recognizing the target object in the reconstructed display plane by using an image recognition or classification algorithm.

A method disclosed herein relates to displaying three-dimensional images. The method comprising, projecting integral images to a display device, and displaying three-dimensional images with the display device. Further disclosed herein is an apparatus for displaying orthoscopic 3-D images. The apparatus comprising, a projector for projecting integral images, and a micro-convex-mirror array for displaying the projected images.

The invention discloses an integral imaging naked eye three-dimensional autostereoscopic LED (light emitting diode) display system and a display screen thereof. The display system comprises a computer, an integral imaging naked eye three-dimensional autostereoscopic LED display screen connected with the computer, and a camera array which is used for acquiring image element array generated by an image element for the computer, wherein the image element array is displayed in the LED display screen through the computer. The LED display screen comprises a plurality of image units which are in array assembly together; the image unit comprises a planoconvex lens, a light blocking membrane arranged at the periphery of the planoconvex lens, and a plurality of LED pixel lamps; one surface of the planoconvex lens is a plane, and the other surface is a convex surface; the LED pixel lamps are arranged on the plane, and the lighting center of the LED pixel lamps is positioned on a focal plane of the planoconvex lens. By the integral imaging naked eye three-dimensional autostereoscopic LED display screen adopting the technical scheme, panorama three-dimensional imaging technology is perfectly combined with the LED display system through integral imaging, a typoscope is unnecessary; the viewing distance is more flexible, and the crosstalk degree is little.

An apparatus for generating a parallax image to be used for a display of a three-dimensional image on a three-dimensional integral imaging display includes an image signal acquiring unit, an image signal assigning unit, and a parallax image generator. The image signal acquiring unit acquires a plurality of image signals by picking up an image of an image object from a plurality of different parallax directions. The image signal assigning unit assigns an output order of the plurality of image signal so that the plurality of image signals are arranged in a reverse parallax direction order to an order of beam directions of the three-dimensional integral imaging display. The parallax image generator generates a parallax image from the plurality of image signals to which an output order is assigned by the image signal assigning unit.

In a method for manufacturing an integral imaging device, a layer of curable adhesive is first applied on a flexible substrate and half cured such that the curable adhesive is solidified but is capable of deforming under external forces. Then the curable adhesive is printed into a lenticular lens having a predetermined shape and size using a roll-to-roll processing device and fully cured such that the curable adhesive is capable of withstanding external forces to hold the predetermined shape and size. Last, a light emitting diode display is applied on the flexible substrate opposite to the lenticular lens such that an image plane of the light emitting diode display coincides with a focal plane of the lenticular lens.

The invention discloses an integral imaging 3D liquid crystal display and optical equipment used by the same. The integral imaging 3D liquid crystal display comprises a lens array, a display panel and a dimming panel which is clamped between the lens array and the display panel, wherein the dimming panel comprises a plurality of dimming units corresponding to different lenses or combinations of the lens array, an electrode and a dimming material; the dimming units do not have displacement relative to the lens array and the display panel during the operation; the electrode is applied with voltage to ensure that the transmission direction of a light ray from the display panel is changed when the light ray is transmitted to the lens array by the dimming material. The angle of view of the integral imaging 3D liquid crystal display can be enlarged.

An integral imaging system may include a lens unit. The lens unit may include a first substrate; a second substrate; a first electrode on the first substrate; a second electrode on the second substrate; a liquid crystal layer between the first and second substrates; and an array of nanostructures protruding from the first substrate into the liquid crystal layer. The first and second electrodes may be configured to apply one or more voltages to the array of nanostructures. When the one or more voltages are applied to the array of nanostructures, one or more electric fields may be formed between the array of nanostructures and the second electrode, varying an arrangement of molecules in the liquid crystal layer and forming a refractive index distribution in the liquid crystal layer.

Exemplary methods, endoscopes, and endoscope sheaths are provided having an integrally formed imaging window. The sheath may comprise thin coiled wires and may be made using a dip-casting process.

The invention relates to a fundus camera that incorporates an integral imaging system for capturing an integral photograph of the fundus. This integral photograph enables projecting a three-dimensional image and generating topographical maps of the fundus. The fundus camera can function plenoptically and thus zoom onto a two-dimensional image generated from the integral photograph. The proposed equipment consists of an optical system for illuminating the fundus and an optical system forming the integral image capture system. This capture system includes an ophthalmoscopic lens, a microlens array and a sensor, and it allows recording, in a single shot, multiple views of the fundus. To improve the resolution of the integral photograph, the capture system has a device that allows displacing the microlens array by a few microns.

The invention discloses a remapping-based integral imaging micro-image array rapid generation method. The remapping-based integral imaging micro-image array rapid generation method includes two steps: calculation of a mapping matrix, and acquisition of remapping of a parallax image by means of a camera array. The remapping-based integral imaging micro-image array rapid generation method utilizes a chequer scaling board to calculate and store a mapping matrix, enables a parallax image taken by a camera array to directly generate a micro-image array through remapping, and simplifies three processes, monocular correction of the camera, multi-view calibration and image combination of micro-image array, into one process which is suitable for GPU parallel processing at the same time, so that the generation speed of the micro-image array is accelerated and generation of the micro-image array is easy for implementation.

The invention provides an integral imaging display system with display parameters capable of being controlled interactively and a control method of the integral imaging display system. The system comprises a display panel used for displaying a unit image array and a unit lens array used for carrying out 3D reconstruction on the unit image array displayed by the display panel. The system further comprises a liquid crystal display panel used for generating a mask pattern sequence, the liquid crystal display panel is arranged between the display panel and the unit lens array, the liquid crystal display panel is attached to the unit lens array, and the display panel is arranged on a rear focal plane of the unit lens array. According to the system, the mask pattern sequence formed by alternately controlling the liquid crystal display panel in a conversion mode is used for dynamically controlling the aperture shape and transmittance of each unit lens, and therefore the reconstruction image resolution or reconstruction image field depth or whole field angle of the system is controlled. The system and the use method have the advantage of being high in capacity of interaction control over the three display parameters, and can be used for the field of naked-eye 3D image displaying, 3D televisions and the like.

The invention discloses a wide-viewing-angle integral imaging 3D display apparatus. Horizontal pitches of pin holes in any row of a pinhole array with gradually-varied aperture are the same, the horizontal aperture width of the pinholes in the pinhole array with the gradually-varied aperture is gradually increased from the middle to the two sides, and the horizontal width of a reconstruction 3D vision area of an image primitive in a micro-image array is gradually increased from the middle to the two sides via the pinholes in the pinhole array with the gradually-varied aperture so that the horizontal width of a public area of all the image primitive reconstruction 3D vision areas is increased, and the integral imaging 3D display visual angle is wider than the display visual angle of a non-crosstalk integral imaging 3D display apparatus based on polarization grating in the prior art.

The invention provides an energy-saving jump-image-free integral imaging and displaying device based on grating waveguide, which is used to solve the technical problem that existing integral imaging and displaying devices have low light energy utilization rate and cannot balance the imaging quality and the processing technology. The energy-saving jump-image-free integral imaging and displaying device based on grating waveguide comprises an LED light source, a waveguide medium, a display panel and a microlens array. The LED light source is an array light source formed by red, green and blue three-primary-color LED lights. The display panel is a liquid crystal panel without a color filter. A grating which consists of a plurality of periodically-arranged grating elements is disposed on the surface, adjacent to the display panel, of the waveguide medium. Each grating element comprises three grating regions corresponding to the periods of red, green and blue three-primary-color light, from large to small. The microlens array, the display panel and the waveguide medium are sequentially arranged in parallel. The LED light source is located at the side of the waveguide medium. Light emitted from the LED light source is irradiated onto the corresponding grating region, and light emitted from the region can be vertically irradiated only onto a light channel, corresponding to the region, on the display panel.

The invention discloses a gradually-varied aperture pinhole array-based non-crosstalk integral imaging 3D display device, which comprises a 2D display screen and a gradually-varied aperture pinhole array, wherein the 2D display screen is used for displaying a micro-image array; horizontal and vertical central axes of the gradually-varied aperture pinhole array are correspondingly aligned at the horizontal and vertical central axes of the 2D display screen respectively; a first polarization grating is attached to the 2D display screen; a second polarization grating is attached to the gradually-varied aperture pinhole array; the first polarization grating and the second polarization grating are formed by tightly arranging a series of grid line units with the same sizes in the horizontal direction; each grid line unit only has one polarization direction; and the polarization directions of any two adjacent grid line units are intersected or opposite. The gradually-varied aperture pinhole array-based non-crosstalk integral imaging 3D display device provided by the invention aims at solving the crosstalk in the horizontal direction, so that a gradually-varied aperture pinhole array-based integral imaging 3D display device can be widely applied.