Abstract: A method for banding suppression due to vibration in an image forming and/or image receiving apparatus with laser driver utilizes governing equations which relate the on/off time and intensity to velocity and frequency of vibration are disclosed. Using derived formulas, an amplitude and frequency modulation (AM/FM) combination is used to suppress the banding due to vibration. The equation which governs the on/off time (FM) is t1+e sin(2&pgr;ft1)/vn=t0. This transcendental equation can be solved for the required on-time t1 in terms of the nominal on-time t0, e (vibration amplitude ), v0 (nominal velocity) and f (vibration frequency). The equation which governs the intensity is H3(t)=v(t)/v0. H3(t) controls the level of irradiance. This method is further extended to multi-temporal vibration frequency and may correct banding due to irradiance modulation.

Abstract: An apparatus for printing images including illumination optics (75) that provides uniform area light is disclosed. A mirror (440) receives the uniform area light and redirects the light. A first reflective LCD modulator (90) modulates the redirected light on a site by site basis and reflects the first modulated light to a media plane. A motor (441) moves the mirror on a line parallel to the illumination optics. The mirror redirects the light to a second reflective LCD modulator (95). The second reflective LCD modulator modulates the redirected light on a site by site basis and reflects the second modulated light to the media plane.

Abstract: An apparatus utilizing non-coherent light digitally exposes a light-sensitive medium. The apparatus includes a non-coherent light source such as a wall stabilized plasma-filled capillary lamp, a reflector positioned proximate the non-coherent light source to reflect actinic radiation, a modulator positioned to selectively transmit the reflected actinic radiation and the light sensitive material positioned proximate the modulator to receive modulated actinic radiation.

Abstract: To produce a printing block, a relief is introduced into a surface of a printing block blank. To form the relief, material of the printing block blank is removed along tracks. The material is removed by radiation to form recesses, between which plateaus will be formed. The surface of the printing block blank located between the recesses is also removed by radiation in order to obtain lower-lying plateaus.

Abstract: A light and heat sensitive recording material passes through an accommodating section and a heat-development section and reaches an optical recording section. At the optical recording section, optical recording is effected, at the heat-development section, development is effected and at the photo-fixing section, fixing is effected upon the light and heat sensitive recording material. Finally, the light and heat sensitive recording material is discharged from a discharge section to the outside. At the photo-fixing section, white light from the optical recording section is used and irradiated onto the light and heat sensitive recording material. Thus, by using the same light source, a latent image can be appropriately recorded on the light and heat sensitive recording material and the heat-developed image can be reliably fixed.

Abstract: An optical scanning device condenses a beam deflected by a light deflector, by a scanning and imaging lens toward a surface to be scanned to form a beam spot thereon, and scans the surface to be scanned by the beam spot. At least one lens of the scanning and imaging lens is configured so that a lens body thereof is held by a holding frame, wherein a rib surface at an end in a longitudinal direction of the holding frame is inclined so that a ghost light generated as a result of the deflected beam being reflected by the end in the longitudinal direction of the holding frame is changed in light path in a sub-scan direction.

Abstract: An image recording apparatus (1) has a stage unit (2) for holding a substrate (9), an irradiation unit (4) having a plurality of irradiation parts (40) and a mechanism for relatively moving the stage unit (2) and the irradiation unit (4). An irradiation part (40) is provided with a DMD having a group of micromirrors for modulating a reflected light beam and a micro moving mechanism for moving the DMD relatively to the irradiation unit (4) in the X direction, thereby microscopically moving an irradiation position of the irradiation part (40) in the X direction. The irradiation part (40) is further provided with a zoom lens, thereby magnifying and reducing an image of the DMD on the substrate (9). By controlling a plurality of irradiation parts (40) parallelly and independently, the image recording apparatus (1) can write a fine pattern at high speed.

Abstract: In an exposure apparatus of the invention, for a spatial light modulator, each of a plurality of pixel portions fewer than the total number of the pixel portions is controlled with a control signal generated according to exposure information. Namely, a part of the pixel portions is controlled without controlling a whole of the pixel portions on the substrate. Thus, the number of pixels in the pixel portions is decreased, and transfer time of the control signal becomes short. This enables modulation speed of the laser beam to be increased and the high-speed exposure to be performed. An incorporated laser light source, in which the laser beams are incorporated and struck on the optical fiber, is preferable to the laser device. By adopting the incorporated laser light source, high brightness and high output can be obtained, and it is preferable to the exposure of the spatial light modulator. Since the fiber array is obtained with few optical fibers, it is low cost.

Abstract: There is provided an image recorder which allows easy malfunction detection in a light modulator and can previously prevent the occurrence of fogging of a photosensitive material, a fire, or the like.

Abstract: A calibration system for a platesetter or imagesetter is applicable to systems that have a media drum and a carriage, including a light source and a spatial light modulator for selectively exposing the media that is held against the drum. The invention can be applied to internal or external drum systems. The calibration system comprises a calibration sensor that is scanned relative to the spatial light modulator. The controller then analyzes the response of the calibration sensor to generate calibration information that is used to configure the spatial light modulator. The use of this calibration sensor allows for job-to-job calibration of the spatial light modulator, in one example, that ensures; the generation of a high quality images, without banding, for example, on the media. This calibration system is also used to detect a best focus position for projection optics by measuring a contrast ratio between exposure and dark levels for various focus settings.

Abstract: A method for receiving digital images from a digital image file and recording corresponding visual images onto a motion picture photosensitive medium includes receiving information related to the image aperture format and image type positive or negative of the digital images to be recorded on the motion picture photosensitive medium.

Abstract: A calibration system for a platesetter or imagesetter is applicable to systems that have a media drum and a carriage, including a light source and a spatial light modulator for selectively exposing the media that is held against the drum. The invention can be applied to internal or external drum systems. The calibration system comprises a calibration sensor that is scanned relative to the spatial light modulator. The controller then analyzes the response of the calibration sensor to generate calibration information that is used to configure the spatial light modulator. The use of this calibration sensor allows for job-to-job calibration of the spatial light modulator, in one example, that ensures the generation of a high quality images, without banding, for example, on the media. This calibration system is also used to detect a best focus position for projection optics by measuring a contrast ratio between exposure and OFF light levels for various focus settings.

Abstract: A calibration system for a platesetter or imagesetter is applicable to systems that have a media drum and a carriage, including a light source and a spatial light modulator for selectively exposing the media that is held against the drum. The invention can be applied to internal or external drum systems. The calibration system comprises a calibration sensor that is scanned relative to the spatial light modulator. The controller then analyzes the response of the calibration sensor to generate calibration information that is used to configure the spatial light modulator. The use of this calibration sensor allows for job-to-job calibration of the spatial light modulator, in one example, that ensures the generation of a high quality images, without banding, for example, on the media. This calibration system is also used to detect a best focus position for projection optics by measuring a contrast ratio between exposure and OFF light levels for various focus settings.

Abstract: The present invention relates to an apparatus and method for patterning a work piece arranged at an image plane and sensitive to electromagnetic radiation. Said apparatus comprising a source for emitting electromagnetic radiation directed onto a selected object plane, a computer-controlled reticle comprising a plurality of object pixels, adapted to receive said electromagnetic radiation at said selected object plane and being capable of relaying said electromagnetic radiation toward said work piece arranged at said image plane, an optical projection system comprising a Fourier filter adapted to filter said relayed radiation in a Fourier space and a first lens arrangement adapted to create essentially parallel central axis of cones of radiation onto said image plane, where every cone of radiation in a specific image pixel in said image plane corresponds to a specific object pixel in said computer-controlled reticle.

Abstract: A method for individualised marking of electronic components in electronics manufacture, such as circuit boards. On the photosensitive surface required for manufacturing the blanks is exposed, on each blank, a machine-readable pattern, which is subsequently used in the manufacture of the product itself, for individualising the blanks in question.

Abstract: A multi-beam scanning apparatus is provided for use with a recording medium that is located on an at least partially cylindrical inner bearing face of a recording device, in which the bearing face has a cylinder axis. The scanning apparatus includes a scanner unit for scanning the recording medium with at least one exposure beam. The scanner unit includes an acousto-optical element that is either an acousto-optical deflector or an acousto-optical modulator. The scanner unit includes a deflection element that is axially displaceable and rotatable relative to the cylinder axis of the bearing face. The acousto-optical element is mounted to rotate together with the deflection element about the cylinder axis.

Abstract: An apparatus for printing images including an illumination optics (75) that provides uniform area light is disclosed. A polarizing beamsplitter (80) receives the uniform area light and redirects a first polarization state of the light to a first reflective LCD modulator (90) which modulates the first polarized light on a site by site basis and reflects the first modulator light through the polarizing beamsplitter (80). A parallel plate tilted at a first angle spatially displaces the first modulated light along a first line normal to the polarizing beamsplitter (80). A print lens assembly (110) images the first modulated light to a first position on a media plane to print a first image. The parallel plate is moved to a second position (250) and a new image is printed.

Abstract: A display apparatus includes a laser light source for emitting a light beam having a coherence length; a beam expander for expanding the light beam; a spatial light modulator; beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator, the beam shaping optics including a fly's eye integrator having an array of lenslets; a diffuser located in the light beam between the laser light source and the beam shaping optics; an electrically controllable de-speckling modulator for modifying the temporal and spatial phase of the light beam; and a projection lens for producing an image of the spatial light modulator on a distant screen.

Abstract: The exposure head includes at least one light source of a broad area type, an optical waveguide gradually broadening in a broad area direction of the light source toward a traveling direction of light emitted from the light source, a member collimating the light traveling in a perpendicular direction to the broad area direction, the light being emitted from the optical waveguide and a light modulating device including a plurality of modulation units arrayed in the broad area direction. The image recording apparatus includes the above exposure head an optical system for focusing on a predetermined position the light emitted from the exposure head and a scanner for allowing the exposure head and a photosensitive material to move relatively, while regulating the photosensitive material at the predetermined position.

Abstract: An optical switch that any vibration or oscillation transmitted to the optical switch from the outside is substantially prevented from being transmitted to a movable electrode is provided. In an optical switch comprising: a stationary electrode; a movable electrode opposed to the stationary electrode with a predetermined space therebetween; and a mirror mounted to the movable electrode, wherein the movable electrode and the mirror are moved together by applying a voltage between the stationary electrode and the movable electrode thereby to switch the path of an incident optical signal to the optical switch, a buffer member provided with a diaphragm is attached to the bottom of the stationary electrode, and a vibration or oscillation is substantially prevented from being transmitted to the movable electrode by the damping effects of the diaphragm and the space area formed above the diaphragm.

Abstract: An optical recording art is characterized by converting a light from a light source into a modulated light including an amplitude-modulated light and a phase-modulated light and forming an image of the modulated light on a surface of an object.

Abstract: 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).

Abstract: A laser printing system for illuminating an elongate region of a photosensitive surface. The laser printing system includes a laser source to generate a light beam in a light path and a light modulation assembly that includes an n×m array of elements, wherein the n×m array has an aspect ratio of at least 1:100. The laser printing system additionally includes an expansion assembly disposed in the light path between the laser source and the light modulation assembly to expand the light beam and impinge the light beam simultaneously on substantially all of elements in the n×m array of elements.

Abstract: An induction charge mirror is provided which makes a rotation mirror which is operated under an electrostatic force hinge-free and achieves a greater aperture rate in a simpler structure and the easiness with which it is manufactured. To this end, a space is provided in an upper surface portion of the insulating substrate and surrounded at least its surface portion surrounded with an insulating material. A flat mirror conductor is tiltably set within the space. A transparent electrode and first and second fixed electrodes are provided. A means is provided for normally applying a first potential to the transparent electrode and, in order to switch the tilting angle of the mirror conductor, means are provided for alternately applying a second potential and third potential to the first and second fixed electrodes.

Abstract: A structure in which first to third diodes cause signal beams which are produced by modulating image signals to be incident upon corresponding first to third light deflection scanning sections. The first to third light deflection scanning sections perform line scanning operations using the incident light signal beams. First to third light amplifiers amplify the light signal beams used for the line scanning to necessary brightnesses. A light-wave synthesizer synthesizes the amplified light signal beams into one light beam. A light post scanning section performs frame scanning using the synthesized light beam in order to project it onto a screen. Accordingly, it is possible to display a highly bright image at a low cost on a large screen that realizes high definition and color reproducibility.

Abstract: A laser beam emitted from a high output semiconductor laser 101 is irradiated into an interference type optical shutter 105 by a first optical system 103 as a wide laser beam along a predetermined direction which intersects with an emitted direction of the laser beam, and also a voltage which mates with the images to be recorded on the recording medium 3 is selectively applied to the electrode pairs of the interference type optical shutter 105, thus the laser beam being input into the interference type optical shutter 105 is optically modulated by an electro-mechanical operation of a flexible thin film to thus irradiate onto the recording medium 3 via a second optical system 107. Accordingly, the image recording apparatus with high reliability, which is able to record the image on the recording medium in the heat mode at high speed by using the high power laser, can be provided.

Abstract: Process and apparatus for a plotting raster image on a light-sensitive carrier. The process includes continuously displacing an exposure head, having a light modulator, relative to the light-sensitive record carrier, positioning a lens between the exposure head and the light-sensitive record carrier, and displacing the lens relative to the exposure head and light-sensitive record carrier. The apparatus includes an exposure head having a light modulator, a light-sensitive record carrier, and a plotting drive unit coupled to at least one of the exposure head and the light-sensitive record carrier. In this manner, the exposure head and the light-sensitive record carrier are adapted for relative movement to each other. The apparatus also includes a lens positioned between the exposure head and the light-sensitive record carrier, and a lens drive unit coupled to the lens. In this manner, the lens is adapted for movement relative to the exposure head and light-sensitive record carrier.

Abstract: Digital microprinters such as maskless projection lithography systems can be adversely affected by pixel cross talk resulting from coherent interactions between adjacent pixels. Such effects are significantly mitigated by inducing a &pgr;/2 optical phase shift between adjacent pixels. In one implementation, the printing surface is exposed twice, with the phase shift sign-inverted between exposures so that coherent interaction effects cancel out between the two exposures.

Abstract: The present invention concerns a printer for recording an image on a recording material by using a reflecting device such as a digital micro-mirror device or a D-ILA device. The printer includes a light source to emit irradiation light; a reflecting device to reflect the irradiation light, the reflecting device being integrated with a plurality of micro-reflectors, which are arrayed in two-dimensional directions of rows and lines, and each of which is independently controllable to vary a reflection angle of the irradiation light emitted from the light source; a light splitter to split reflection light reflected by the reflecting device; a light guide to guide the reflection light, split by the light splitter, to a predetermined position on the recording material; and a conveying device to move the recording material in a predetermined direction.

Abstract: A display system, including: a light source providing illumination; a linear array of electromechanical grating devices of at least two individually operable devices receiving the illumination wherein a grating period is oriented at a predetermined angle with respect to an axis of the linear array wherein the angle is large enough to separate diffracted light beams prior to a projection lens system for projecting light onto a screen; a polarization sensitive element that passes diffracted light beams according to their polarization state; a segmented waveplate for altering the polarization state of a discrete number of selected diffracted light beams wherein the segmented waveplate is located between the linear array and the polarization sensitive element, a scanning element for moving the selectively passed diffracted light beams on the screen; and a controller for providing a data stream to the individually operable devices.

Abstract: A display system, including: a light source providing illumination; a linear array of electromechanical grating devices of at least two individually operable devices receiving the illumination wherein a grating period is oriented at a predetermined angle with respect to an axis of the linear array wherein the angle is large enough to separate diffracted light beams prior to a projection lens system for projecting light onto a screen; a polarization sensitive element that passes diffracted light beams according to their polarization state; a segmented waveplate for altering the polarization state of a discrete number of selected diffracted light beams wherein the segmented waveplate is located between the linear array and the polarization sensitive element; a scanning element for moving the selectively passed diffracted light beams on the screen; and a controller for providing a data stream to the individually operable devices.

Abstract: A method of modeling and enhancing the print quality of digital printing, including both electrophographic printing and photofinishing. Pixels are printed with a device such as a DMD, whose pixels provide a steep-sided intensity versus displacement curve of each light spot on the image plane. Holes placed in the pixel can be used to place a dip in the top of the curve, a feature especially useful for electrophotographic printing. The effect of this hole on the image plane can also be flattened, a feature than may be especially useful for photofinishing. The steep-sided intensity curve facilitates the ability to model and predict pixel size.

Abstract: An apparatus for outputting a laser beam includes a laser beam source and laser beam diameter adjusting means for adjusting a diameter of a beam incident from the laser beam source. The apparatus also includes laser beam reflecting direction controlling means for controlling a reflecting direction of the beam incident from the laser beam diameter adjusting means, and recording means for recording information data in accordance with the diameter of the beam incident from the laser beam reflection direction controlling means.

Abstract: A method of printing (10) to a photosensitive media contains the step of imaging light from a light source through an optics assembly to a polarization beamsplitter (80). The polarization beamsplitter (80) produces a first polarized state and a second polarized state. The first polarized state is directed to a first filter to a first spatial light modulator. The first spatial light modulator is addressed with a first color signal to modulate the first polarized beam which is reflected back through the polarization beamsplitter (80). A second polarized light is passed through a second filter to a second spatial light modulator. A second color signal causes said second spatial light modulator to reflect a second modulated light beam through the polarization beamsplitter (80). The first and second modulated light beam are focused through print lens (110) onto a photosensitive media.

Abstract: An optical recording apparatus in which multi-channel acousto-optic modulator (1-10) is provided on the optical path in such a way that the individual channels thereof are arranged substantially horizontally.

Abstract: An image forming device for forming optically inputted two-dimensional images. A light valve, including a bistable electrooptic medium and a photoconductive material, acts as an image recording device which records an image inputted from an image inputting device. When the light valve is irradiated by the light from the image inputting device, the electrooptic medium makes a state transition by photoelectric converting action of the photoconductive material. The state of the electrooptic medium is dependent on the threshold voltage across the light valve and on the threshold intensity of the input light. The recorded image can be outputted to film or any type of visual display apparatus. The image inputting device can be a modulated scanned light beam, as from a laser.

Abstract: Microarea light-emitting diodes, which have no variation in light output power and the like due to mode-hopping, are used and changes in properties such as light output and the like due to generated heat are prevented. Pulses having a constant period and a substantially constant power are used, a number of the pulses within a period for forming an image corresponding to one pixel is determined on the basis of image data, and light beams emitted from the microarea light-emitting diodes are modulated by pulse signals including the determined pulses.

Abstract: A laser beam emitted from a high output semiconductor laser 101 is irradiated into an interference type optical shutter 105 by a first optical system 103 as a wide laser beam along a predetermined direction which intersects with an emitted direction of the laser beam, and also a voltage which mates with the images to be recorded on the recording medium 3 is selectively applied to the electrode pairs of the interference type optical shutter 105, thus the laser beam being input into the interference type optical shutter 105 is optically modulated by an electromechanical operation of a flexible thin film to thus irradiate onto the recording medium 3 via a second optical system 107. Accordingly, the image recording apparatus with high reliability, which is able to record the image on the recording medium in the heat mode at high speed by using the high power laser, can be provided.

Abstract: A scanning optical unit is provided which can prevent flare reflection of a laser beam at an end portion of a reflecting mirror which is provided outside an exposure region and which is for detecting a time of starting of exposure by the laser beam. In the scanning optical unit, given that a propagation distance from a transducer of an acousto-optic modulator (AOM) to a diffracted position of the laser beam passing through an acousto-optic modulating medium is L, a propagation speed of ultrasonic waves within the acousto-optic modulating medium is V, a main scanning speed of the laser beam is v, a distance from a position on a reflecting mirror at which the laser beam is reflected onto an SOS sensor to a recording medium side end portion of the reflecting mirror is l, and a focal length of an f&thgr; lens is f, a relationship L<l·V/{v·(f−t)/f} is established so as to prevent flare reflection of the laser beam.

Abstract: Apparatus for transmitting information at a data rate, comprising:

Abstract: A light valve which can be fabricated as an array of individually addressable micromachined linear mirror reflective light valves is disclosed. Each light valve may comprise a metallized silicon nitride ribbon situated above a micromachined cavity. Incident light is reflected by the ribbons. The reflected beam travels into an optical collecting system. The ribbons may be caused to deform into the micromachined cavities by the application of electrical signals. Only a small area on the ribbons is required to be reflective. The deformation causes light reflected by the deformed ribbon to be substantially collimated. The collimated reflected light can be directed through a slit and focussed on a spot to record a data element on a recording surface. A light valve array according to the invention may be used for various data recording applications including exposing printing plates, printed circuit boards, silicon wafers, masks for making semiconductor devices, optical data storage systems and the like.

Abstract: An optical printer apparatus exposes a sensitized sheet (500) to light from a light source (110), which is movable relatively to the sensitized sheet (500), with given timing in accordance with image data composed of pixels having a plurality of gradations that are linearly changeable from a minimum gradation of low color density to a maximum gradation of high color density. The distance for the exposure is adjusted for area gradation, whereby a gradated image is formed on the sensitized sheet (500). Further, change of the exposure distance, compared to change of the gradation, is not uniform throughout the range, and a non-linear relation is established between the changes.

Abstract: An exposure method for a printer with a micromirror device as a spatial light modulator. In an exposure sequence of one color, each micromirror of the mirror array of the spatial light modulator is driven by N-bit mirror drive data sequentially from most to least significant bits. While the micromirrors are driven responsive to the most to Jth significant bits of the N-bit data, the micromirrors are illuminated continuously, and the driving time intervals are reduced half by half. While the micromirrors are driven responsive to the lower bits of the N-bit data, the driving time intervals are maintained at a constant shortest value, and the micromirrors are illuminated intermittently for shorter times than the shortest driving time interval, allowing for more tonal levels than possible by modulating mirror driving intervals alone.

Abstract: An illumination system (10) having an automated calibration system (62) for adjusting the light intensity of individual elements (14) of an array of light emitting elements (12). An optical sensor (30) can be positioned in several locations (A,B,C) to sense incident light from a spatial light modulator (20) as the modulator is sequentially actuated one zone (50) at a time. The light output from each zone (50) of the spatial light modulator is characterized and compared to a golden standard, and the light emitting elements of the array associated with illuminating the zones that are deficient in light are ascertained. Adjustment circuitry (62) responsively adjusts and increases the drive current to the associated light emitting elements (14) that are deficient in light output. A look-up table is utilized to determine which LEDs (14) need adjustment to their drive currents to insure uniform illumination in the process and cross-process direction at an image plane.

Abstract: Multiple pulse width and position modulation methods and systems use multiple pulse width and position modulation (PWPM) circuits driven from the same system clock and video data to provide multiple video pulses per clock period. The multiple pulse width and position modulation methods and systems separately provide extremely fine halftone structures from n-bit per pixel video data words. The halftone structures can be provided without the need for extremely high resolution raster output scanners, associated optics and high speed electronics. The multiple pulse width and position modulation system (PWPM) can produce video pulses of variable width and position within a pixel period with extremely high addressability. The pulses output from multiple, independent pulse width and position modulation (PWPM) channels can be combined to form structured multiple video pulse patterns within the video clock or pixel period from a given n bit video data word.

Abstract: The pixel clock of a raster output scanning (ROS) system modulates an emitted light beam to provide pixel placement along a scan line. A method calculates the pixel clock frequency shifts to correct non-linearity of the scan line in a ROS. A data smoothing polynomial is calculated for the non-linearity of the pixels along the scan line. The needed frequency shift based on the polynomial to the first or higher orders is calculated and stored in a frequency shift look-up table. The calculated frequency shift from the frequency shift lookup table modifies the nominal pixel clock frequency to correct for the measured scan linearity of the ROS by modulation of the light beam.

Abstract: A deformable mirror light valve comprised of an array of silicon nitride ribbons, metalized to reflect light. Each ribbon is electrostatically deformed to form a cylindrical mirror. Each deformable ribbon modulates the light of one pixel by focusing the reflected light through a slit. An alternative embodiment focuses the light onto a stop. The ribbon structure has a fast response time combined with high contrast.

Abstract: An electrophotographic image forming apparatus transfers image information relating to an image to be formed on a medium, while maintaining desired low levels of electromagnetic emissions. The apparatus includes an image processor that generates low-frequency image information signals containing the image information. A low-frequency interface is connected to the image processor for transferring the low-frequency image information signals. A control circuit, connected to the low-frequency interface, receives the low-frequency image information signals generated by the image processor. The control circuit operates on the low-frequency image information signals to form a high-frequency image information signal therefrom, where the high-frequency image information signal contains the image information. The apparatus also includes a high-frequency interface connected to the printhead control circuit for transferring the high-frequency image information signal.

Abstract: The exposure time of high data rate single spot laser scanner can be extended by the use of Time Domain Integration (TDI) mode imaging to expose thermographic materials. Many thermographic materials, such as thermal printing plates, can not be properly exposed in single spot scanners such as internal drum scanners, due to the shortness of the exposure time of a single spot, but can be exposed by the extended exposure time of TDI scanning. The Scophony effect can also be used as a method of TDI.

Abstract: An optical recording and data processing system for exposing an image on to a flexible, light sensitive medium, which includes a medium holder having an inner cylindrical wall portion against which is held said medium, and a light source having an approximately rectangular emitting aperture, with a short aperture axis and a long aperture axis, operative to emit a beam of light having a rectangular cross section with a long axis corresponding to the long aperture axis and a short axis corresponding to the short aperture axis. An optical modulator is aligned with the light source so as to intercept light from the beam of light and produce a spatial modulation pattern across the long axis of the beam of light. A pattern shifter for shifting the spatial modulation pattern across the length of the long axis at a constant rate is provided as is a pattern rotator for rotating the spatial modulation pattern at a rate equal to the rate of shifting of the spatial modulation pattern.