摘要:
A holographic display system (100) for generating a super hologram (150) with full parallax in the horizontal and vertical directions. The system includes an array of holographic display devices (110), e.g., spatial light modulators (SLMs, 114), operable to provide a plurality of holographic images (115) of a scene from differing viewpoints of the scene. Each SLM is operated concurrently to output a narrow field of view, elemental hologram. The system includes coarse integral optics (120) combining the holographic images into a single hologram ("super hologram", 150) viewable in a hologram image plane a distance from the coarse integral optics. The coarse integral optics combine the holographic images by providing angular tiling of the holographic images, e.g., bending the axes (141) of parallel lenses. In this manner, the field of view, in one direction, of the super hologram is based on the number of holographic display devices provided in the array in one direction.
摘要:
A method of computing a hologram by determining the wavefronts at the approximate observer eye (OE) position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window (OW) that would be generated by a real object located at the same position of the reconstructed object (3D-S). One can then back-transform these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram (HA) can then generate a reconstruction of the three-dimensional scene (3D-S) that can be observed by placing one's eyes at the plane (OP) of the observer window (OW) and looking through the observer window (OW).
摘要:
A dynamic three-dimensional image can be modified in response to poses or gestures, such as hand gestures, from a user. In one implementation, the gestures are made by a user who selects objects in the three-dimensional image. The gestures can include indications such as pointing at a displayed object, for example, or placing a hand into the volume of space occupied by the three-dimensional image to grab one or more of the displayed objects. In response to the gestures, the three-dimensional display is partially or completely redrawn, for example by an alteration or repositioning of the selected objects. In one implementation, a system simulates the dragging of a displayed three-dimensional object by a user who grabs and moves that object.
摘要:
Systems and methods for generating a true 3-D display, where each of a viewer's eyes not only sees a different scene, but the scene changes continuously as the viewer moves his/her head or change his/her position from one angular location to another angular location with respect to the display screen. In one embodiment, a system comprises a set of 2-D image projectors and a display screen. The 2-D image projectors are configured to project individual 2-D images substantially in focus on the display screen. The display screen then diffuses (or reflects) each pixel from each of the 2-D images into a small angular slice. This enables the viewer observing the display screen to see a different one of the 2-D images with each eye. Further, the image seen by each eye varies as the viewer moves his or her head with respect to the display screen.
摘要:
A scheme for producing computer generated holograms in which a distance between each display target object and a hologram plane is obtained, a region of calculations for interference fringes due to each display target object is limited according to the obtained distance, interference fringes due to each display target object are separatedly calculated within the limited region of calculations, and a hologram to be displayed is produced by synthesizing separately calculated interference fringes due to all display target objects.
摘要:
An image capture system for a digital holographic printer is disclosed comprising a digital camera (22) having a relatively small horizontal field of view (29). The camera (22) is translated along a rail (21). As the camera (22) is translated along the rail (21) the camera (22) is also rotated so that it faces a target point of an object which is to be reproduced as an hologram. The image data which is obtained by the camera (22) is converted into image data which corresponds with image data which would have been obtained had a non-rotating camera having a substantially higher horizontal field of view been translated along the rail (21) and been used to capture images of the object.
摘要:
A method of computing a hologram by determining the wavefronts at the approximate observer eye (OE) position that would be generated by a real version of an object to be reconstructed. In normal computer generated holograms, one determines the wavefronts needed to reconstruct an object; this is not done directly in the present invention. Instead, one determines the wavefronts at an observer window (OW) that would be generated by a real object located at the same position of the reconstructed object (3D-S). One can then back-transform these wavefronts to the hologram to determine how the hologram needs to be encoded to generate these wavefronts. A suitably encoded hologram (HA) can then generate a reconstruction of the three-dimensional scene (3D-S) that can be observed by placing one's eyes at the plane (OP) of the observer window (OW) and looking through the observer window (OW).
摘要:
A single method and apparatus for producing many of the most common types of hologram from digital data is disclosed. The data are generated entirely by a computer as a 3-D (animated) model or from multiple 2-D camera images taken of a real 3-D (moving) object or scene from a plurality of different camera positions. The data are digitally processed and displayed on a small high resolution spatial light modulator (SLM). A compact low energy pulsed laser, is used to record composite holograms. The present invention permits the creation of restricted or full parallax master transmission or reflection type composite holograms, known as H1 holograms, that can be copied using traditional methods. Alternatively the same invention and apparatus permits the direct writing of hologram without the need to pass through the intermediate stage of the H1 transmission hologram.