摘要:
A printhead having a plurality of exposure elements (18) with improved non-uniformity correction. Spatial variance of the energy emitted by the exposure elements (18) is measured and used to establish spot size characteristics for each exposure element. A sensor (26) scans multiple points along the pixel area written by each exposure element (18) and measures a corresponding output power value at each point. The output power values are evaluated to determine a maximum output power value for the exposure element (18) and to obtain a spot size for the exposure element (18) based on full-width at half-power values. Both spot size data, which can thus be obtained and stored only once, and output power values are then used to correct for non-uniformity's between the exposure elements (18).
摘要:
A method and apparatus for monochromatic printing which records an image from digital image data onto a photosensitive medium (160) is disclosed. The apparatus includes the following: A light source (29) provides the monochromatic illumination. A uniformizer uniformizes a wavefront of light emitted from the light source (29). A polarizer (134) for filtering the uniformized light provides a polarized beam having a predetermined polarization state. A spatial light modulator (52) has a plurality of individual elements capable of altering the polarization state of the polarized beam to provide an exposure beam for printing. A state of each of the elements is controlled according to the digital image data. An optics assembly (11) is used for directing the polarized beam to the modulator and the exposure beam from the spatial light modulator (52). A lens assembly (132) is used for directing the exposure beam onto the photosensitive medium (160).
摘要:
A monochrome printer (100) and a method for printer optics design utilizing a spatial light modulator (52), able to deploy a number of possible monochromatic light sources for use with a number of different types of photosensitive media (160), are disclosed. The printer provides high resolution and grayscale imaging capability for monochromatic applications such as micrographics and for diagnostic imaging. In the apparatus and method, illumination optics (11) receive a source light beam, from one or more LEDs or from a number of other possible monochromatic light sources available on the printer (100), uniformize and polarize the beam, and direct the beam through a polarization beamsplitter element (50). The polarization beamsplitter element (50) directs one polarization state of light to an LCD spatial light modulator (52). The LCD spatial light modulator (52) modulates the polarization of the polarized beam to provide output exposure energy suitable for image marking on dry or aqueous photosensitive media (160). An optional sensor (234) allows printer (100) to automatically select a monochromatic light source of appropriate wavelength for a given type of photosensitive media (160).
摘要:
A holder for holding at least one image bearing medium, with each at least one image bearing medium having a radio frequency transponder associated therewith, the holder having a holding body to receive and hold at least one image bearing medium an antenna and a radio frequency communication circuit operable to sense a first electromagnetic signal transmitted by the remote reader, generate a second electromagnetic signal in the holding body with the second electromagnetic signal adapted to cause the radio frequency transponders associated with said at least one medium held by the holding body to respond with electromagnetic signals that can be used to identify the mediums within the holding body, wherein the radio frequency communication circuit further transmits electromagnetic signals that can be used to identify the mediums within the holding body to the remote reader.
摘要:
A contact printing apparatus (100), using a direct-coupled emissive array (20) of individual light emitting pixels (22), forms an image from digital data onto a photosensitive medium (16). The direct-coupled emissive array (20) is fabricated on an optically coupled substrate (25) that provides light-directing elements, such as a lenslet array or fiber optic faceplate (40) for directing light from emitter pixels (22) to print pixel (71) locations on the photosensitive medium (16).
摘要:
A printhead (10) forms an image onto a photosensitive medium (22) by exposing pixels in a succession of exposures. The printhead (10) has a housing with a first position for an illumination array (20) of LED emitters (16), a second position for a lens array of lens elements (28) and a light-guiding array (26) of uniformizer elements (34), arranged within a corresponding array of cavities extended between the first and second positions (32, 46). For each pixel exposed on the photosensitive medium (22), a single LED light emitter (16) in the illumination array (20) provides light into a single corresponding uniformizer element (34) in the light-guiding array (26), which directs light to a single corresponding lens assembly (38) of the lens array (28).
摘要:
A method and apparatus is provided for line scanning a beam receiving member, wherein a scanning beam is angularly or laterally displaced to compensate for scan line spacing error. The beam is displaced according to error arising from variation (flutter) in the relative motion of the beam and the beam receiving member, or according to error arising from movement of the receiving member while the scanning beam travels to a start of scan position, or both. Embodiments of beam displacement means include a refracting tilt plate, a reflecting tilt plate, a diffracting tilt plate, and a tilt prism.
摘要:
A viewing device and method are provided for use with an image transparency having an associated tracking memory. The viewing device has a display adapted to present at least two illumination patterns, a reader device for obtaining data stored in a tracking memory of an image transparency positioned proximate to the display surface, and a control processing unit. The control processing unit is adapted to receive the obtained data and to generate more than one illumination pattern with a first of the illumination patterns formed for passing through the transparency and second of the illumination patterns formed for viewing on the display without passing through the transparency, wherein the appearance of at least one of the illumination patterns is determined based upon the data obtained from the tracking memory.
摘要:
In one aspect of the invention a data collection device is provided for use with a medium said medium being usable when exposed to electromagnetic radiation that is characteristic of such use. The data collection device has a sensor capable of sensing when the medium is exposed to electromagnetic radiation that is characteristic of such a use and generating an exposure signal in response thereto. A controller is connected to said sensor and stores data in a memory when an exposure signal is detected.
摘要:
A viewing device is provided for viewing at least one image transparency having an associated tracking memory. The viewing device comprises an illumination device having at least one viewing surface adapted to present at least one illumination pattern, at least one radio frequency read write device for obtaining electronic data stored in an associated tracking memory of an image transparency positioned proximate to the viewing surface and at least one display device for viewing at least one electronic image related to said at least one image transparency. A control processing unit is adapted to receive said obtained data from said associated tracking memory and to use the obtained data for forming the at least one electronic image.