摘要:
An single-pass imaging system utilizes a light source, a spatial light modulator and an anamorphic optical system to form a substantially one-dimensional high intensity line image on an imaging surface (e.g., the surface of a drum cylinder). The light source and the spatial light modulator are used to generate a relatively low intensity two-dimensional modulated light field in accordance with an image data line such that each pixel image of the line is elongated in the process (Y-axis) direction. The anamorphic optical system utilizes a cylindrical/acylindrical optical element to anamorphically image and concentrate the modulated light field in the process direction to form the substantially one-dimensional high intensity line image. The line image is generated with sufficient energy to evaporate fountain solution from the imaging surface. The imaging system simultaneously generates all component pixel images of the line image, thus facilitating a printing apparatus capable of 1200 dpi or greater.
摘要:
A low-cost system for increasing the electricity generation of flat panel photovoltaic (PV) farms in which sunlight redirecting elements are positioned in offset spaces provided between adjacent panel assemblies and serve to redirect otherwise unused sunlight onto solar cells disposed on one of the panel assemblies. The redirecting elements are located in a prismatic volume bounded at its upper end by an inclined upper plane that extends across the offset space separating adjacent PV panel assemblies. The redirecting elements are either mounted to at least one of the PV panel assemblies, or placed on the ground between the assemblies. Each redirecting element includes multiple reflecting and/or refracting surfaces that utilize a disclosed microoptical arrangement (e.g., focus and steer or reorient and scatter) to distribute the redirected sunlight in a substantially homogenous (uniform) distribution on the solar cells.
摘要:
An anamorphic projection optical system is disclosed that takes in a relatively low intensity two-dimensional light field, and anamorphically images and concentrates the light field to generate a substantially one-dimensional, high intensity line image extending in a process direction on an imaging surface. The optical system includes a process-direction optical subsystem formed by one or more cylindrical/acylindrical lenses in an all-refractive arrangement, or a combination of cylindrical/acylindrical lenses and mirrors to generate the line image with sufficient energy, for example, to evaporate fountain solution from the imaging surface. The anamorphic optical system also includes a cross-process-direction optical subsystem formed by one or more cylindrical/acylindrical lenses and an optional cylindrical/acylindrical field lens to image the modulated light field in the cross-process direction.The anamorphic projection optical system facilitates simultaneously generating multiple pixel images of the line image, thus facilitating a printing at 1200 dpi or greater.
摘要:
Two substantially one-dimensional scan line images are simultaneously generated by modulating a two-dimensional homogenous light field using a spatial light modulator having light modulating elements arranged in a plurality of rows and a plurality of columns. An upper group of modulating elements are configured using a first scan line image data group, and a lower group of modulating elements are configured using a second scan line image data group. The homogenous light source is then pulsed (toggled) to direct the two-dimensional homogenous light field onto the spatial light modulator. The resulting two-dimensional modulated light field is directed through an anamorphic optical system, which images and concentrates the modulated light on an imaging surface such that two parallel one-dimensional scan line images are simultaneously formed on the imaging surface.
摘要:
An imaging apparatus including multiple spatial light modulators, each including light modulating elements arranged in two-dimensional array disposed in a homogenous light field, multiple anamorphic optical systems, each disposed downstream from an associated spatial light modulator, a scan structure, and an image stitching controller. The light modulating elements of each spatial light modulator are individually adjustable to either pass received homogenous light portions to the anamorphic optical systems, or to block/redirect the homogenous light portions, thereby generating a two-dimensional modulated light field. Each anamorphic optical system images and focuses received modulated light field onto an associated substantially one-dimensional scan line portion on the scan structure. The image stitching controller modifies the image data sent to each spatial light modulator such that selected light modulating elements are enabled or disabled, thereby electronically stitching the scan line portions to form a seamlessly stitched scan line image.
摘要:
A single-pass imaging system for a printing apparatus capable of 1200 dpi or greater that includes a homogenous light generator for generating homogenous light from high energy IR lasers, a spatial light modulator including light modulating elements arranged in a two-dimensional array, and an anamorphic optical system. The light modulating elements are disposed such that each modulating element receives an associated homogenous light portion, and is individually adjustable between an “on” modulated state and an “off” modulated state, whereby in the “on” modulated state each modulating element modulates its received homogenous light portion such that an associated modulated light portion is directed onto a corresponding region of the anamorphic optical system. In the second modulated state, the associated homogenous light portion is prevented (e.g., blocked) from passing to the anamorphic optical system. The anamorphic optical system then anamorphically concentrates the modulated light portions to form a scan line image.
摘要:
An single-pass imaging system utilizes a light source, a spatial light modulator and an anamorphic optical system to form a substantially one-dimensional high intensity line image on an imaging surface (e.g., the surface of a drum cylinder). The light source and the spatial light modulator are used to generate a relatively low intensity two-dimensional modulated light field in accordance with an image data line such that each pixel image of the line is elongated in the process (Y-axis) direction. The anamorphic optical system utilizes a cylindrical/acylindrical optical element to anamorphically image and concentrate the modulated light field in the process direction to form the substantially one-dimensional high intensity line image. The line image is generated with sufficient energy to evaporate fountain solution from the imaging surface. The imaging system simultaneously generates all component pixel images of the line image, thus facilitating a printing apparatus capable of 1200 dpi or greater.
摘要:
A low profile heliostat with elongated louvered mirror segments is provided. Its envelope of revolution has the shape of a flat disc to enable heliostat fields with very high ground coverage ratio. The heliostat's disc-shaped footprint rotates around a substantially vertical axis (akin to a carousel). The short dimension of the mirror segments is drastically shorter than the disc's diameter. Embodiments are described in which the motion relies on two concentric rings, which are individually rotated around a vertical axis. The lower ring acts as a platform providing mainly azimuth tracking, carrying the upper ring. The differential rotation between the upper ring and the lower ring is translated into a rotation of the mirror segments around a second, perpendicular, axis and used for elevation tracking. Disc-shaped heliostat with D-shaped cut-offs are described, to facilitate the required maintenance access even in highly dense heliostat fields.
摘要:
A solar energy harvesting system including a sunlight concentrating member (e.g., a lens array) for focusing direct sunlight at predetermined focal points inside a waveguide containing a stimuli-responsive material (SRM) that is evenly distributed throughout the waveguide material such that the SRM assumes a relatively high transparency state away from the focused sunlight, and small light-scattering portions of the SRM change to a relatively opaque (light scattering) state only in focal zone regions adjacent to the concentrated sunlight. The outer waveguide surfaces are locally parallel (e.g., planar) and formed such that sunlight scattered by the light-scattering SRM portions is transmitted by total internal reflection through the remaining transparent waveguide material, and outcoupled to one or more solar energy receivers (e.g., PV cells) that are disposed outside the waveguide (e.g., along the peripheral edge).
摘要:
A low-cost sunlight redirecting element including multiple substantially identical redirecting structures uniformly arranged and fixedly disposed on a base, where each redirecting structure includes multiple optical surface regions that are cooperatively formed and arranged such that, when the sunlight redirecting element is operably fixedly oriented relative to a stationary target with sunlight directed along an incident direction onto the redirecting structures, at least some of the sunlight is transmitted between the corresponding optical surface regions of each redirecting structure, and redirected from the corresponding optical surface regions toward the target's surface. The optical surface regions are shaped and arranged to redirect the sunlight toward the fixed target surface even when the sunlight's incident angle direction changes during the course of a year. A stationary sunlight redirecting system (e.g., an architectural daylighting arrangement or PV farm) includes the sunlight redirecting element maintained in a fixed relationship to the stationary target surface.