Abstract:
Compressive imaging captures images in compressed form, where each sensor does not directly correspond with a pixel, as opposed to standard image capture techniques. This can lead to faster image capture rates due to lower I/O bandwidth requirements, and avoids the need for image compression hardware, as the image is captured in compressed form. Measuring the transformation of an emitted multimodal signal is one method of compressive imaging. Metamaterial antennas and transceivers are well suited for both emitting and receiving multimodal signals, and are thus prime candidates for compressive imaging.
Abstract:
A monocentric lens-based multi-scale imaging system is disclosed. Embodiments of the present invention comprise a monocentric lens as an objective lens that collects light from a scene. Monocentric lenses in accordance with the present invention include a spherical central lens element and a plurality of lens shell sections that collectively reduce at least one of spherical and chromatic aberration from the magnitude introduced by the spherical lens element itself. A plurality of secondary lenses image the scene through the objective lens and further reduce the magnitude of aberrations introduced by the objective lens. A plurality of sensor arrays converts optical sub-images of the scene into a plurality of digital images, which can then be used to form a composite image of the scene.
Abstract:
A multiscale telescopic imaging system is disclosed. The system includes an objective lens, having a wide field of view, which forms an intermediate image of a scene at a substantially spherical image surface. A plurality of microcameras in a microcamera array relay image portions of the intermediate image onto their respective focal-plane arrays, while simultaneously correcting at least one localized aberration in their respective image portions. The microcameras in the microcamera array are arranged such that the fields of view of adjacent microcameras overlap enabling field points of the intermediate image to be relayed by multiple microcameras. The microcamera array and objective lens are arranged such that light from the scene can reach the objective lens while mitigating deleterious effects such as obscuration and vignetting.
Abstract:
Compressive imaging captures images in compressed form, where each sensor does not directly correspond with a pixel, as opposed to standard image capture techniques. This can lead to faster image capture rates due to lower I/O bandwidth requirements, and avoids the need for image compression hardware, as the image is captured in compressed form. Measuring the transformation of an emitted multimodal signal is one method of compressive imaging. Metamaterial antennas and transceivers are well suited for both emitting and receiving multimodal signals, and are thus prime candidates for compressive imaging.
Abstract:
A system and method for producing images of the structure and composition of an object based on measurements of the low-angle x-ray diffraction properties of the object. The imaging system includes a coded aperture that encodes spatial and spectral features onto radiation scattered from image points within the object. The radiation is detected at a two-dimensional array of detectors, whose output is deconvolved and processed to estimate a three-dimensional image having molecular specificity.
Abstract:
Rapid radio frequency (RF) microwave devices and methods are disclosed. According to an aspect, a waveguide includes a body having first and second components that are attachable together to form an interior having a surface. Further, the waveguide includes a conductive material formed on the interior surface and shaped to convey electromagnetic waves.
Abstract:
Optical systems based on an objective lens comprising one or more plastic lens elements are disclosed. The inclusion of plastic lens element reduces one or more of system cost, size, weight, and/or complexity. The chromatic performance of some imaging systems in accordance with the present invention is improved by incorporation of a diffractive surface into the entry surface of the objective lens.
Abstract:
Multi-sensor compressive imaging systems can include an imaging component (such an RF, microwave, or mmW metamaterial surface antenna) and an auxiliary sensing component (such as an EO/IR sensor). In some approaches, the auxiliary sensing component includes a structured light sensor configured to identify the location or posture of an imaging target within a field of view of the imaging component. In some approaches, a reconstructed RF, microwave, or mmW image may be combined with a visual image of a region of interest to provide a multi-spectral representation of the region of interest.
Abstract:
A panoramic imager comprising a mirror and a multi-scale imaging system is presented. The multi-scale imaging system comprises an objective lens and a plurality of cameras that is arranged in a non-planar arrangement at the image field of the objective lens. The objective lens reduces a first aberration introduced by the mirror, and each camera further reduces any residual first aberration. As a result, panoramic imagers of the present invention can provide improved image quality and higher resolution than panoramic imagers of the prior art.
Abstract:
A system and method for producing images of the structure and composition of an object based on measurements of the low-angle x-ray diffraction properties of the object. The imaging system includes a coded aperture that encodes spatial and spectral features onto radiation scattered from image points within the object. The radiation is detected at a two-dimensional array of detectors, whose output is deconvolved and processed to estimate a three-dimensional image having molecular specificity.