摘要:
A method and apparatus that provide multichannel imaging and that allow using diffraction-limited optics. The imaging apparatus includes a laser beam source to generate single-mode laser beam of energy, a multichannel spatial light modulator (SLM) accepting a plurality of modulating signals, and a beam multiplier between the radiation source and the SLM. The beam multiplier accepts the beam generated by the source and generates from that beam a plurality of beams directed onto the SLM. The beams from the beam multiplier illuminate the active region of the SLM such that the SLM generates a plurality of modulated beams modulated according to the modulating signals. The apparatus further includes an optical subsystem located between the SLM and an imaging plane that includes at least one optical element to focus the modulated beams onto an imaging plane. A recording medium sensitive to imaging radiation from the source is placed at the imaging plane. The recording medium is capable of being permanently marked in response to incidence of such imaging radiation. The beams generated by the SLM are each substantially a single-mode beam such that the first optical subsystem may be designed using diffraction-limited optics.
摘要:
A xerographic print engine employs a photoreceptor with an image receiving surface, a printhead for directing light to the photoreceptor to produce thereon a latent image, and a developer for converting the latent image to a printable image to be transferred from the photoreceptor to a print medium during a relative motion between the photoreceptor and the print medium. The printhead has light emitting diodes (84) disposed in plural rows (82,86) arranged alongside each other on a substrate which also supports driver circuitry connecting with imaging electronics for activating individual ones of the diodes. An optical element (lens 30) focuses light of the diodes onto a row of the latent image, the focussing being accomplished concurrently for individual ones of the diodes located in a plurality of the rows.
摘要:
An exposure head integrated with microlenses for converging or diverging light from light-emitting parts is disclosed, together with a method of fabricating the exposure head and an image forming apparatus using the same. The exposure head has light-emitting parts arranged in the form of at least one row of pixels on a substrate of continuous length. A microlens formed by inkjet printing is provided over a surface of each light-emitting part at a side thereof remote from the substrate.
摘要:
An imaging optical apparatus comprising a gradient-index rod lens array and two transparent or light transmitting optical elements that are substantially identical in shape and imaging characteristics and which are provided in the object space and the image space in the optical path of said gradient-index rod lens array in such a way that they are symmetrical with respect to said gradient-index rod lens array.
摘要:
Disclosed is an image forming apparatus (13) which provides an image of an excellent quality which has a less variation in resolution and suppressed linear irregularity. A rod lens array (24) includes two rows of rod lenses (25) stacked one on the other. An LED array (23) is offset by a predetermined offset amount (Y) from a plane (C) passing the median position between the first row of rod lenses and the second row of rod lenses. This structure can realize an LED printer head which reduces a variation in the resolution of the rod lens array, thereby suppressing linear irregularity, and can thus provide an image having an excellent quality.
摘要:
An optical write-in head for obtaining a clear image even in printing at a relatively high recording density without generating strip-like irregularities in most cases. The optical write-in head applies light carrying image information to a photosensitive substance. The optical write-in head includes an array light source (23) having a plurality of dot light sources, each of which selectively emits the light corresponding to the image information, and a lens array (24) facing the array light source. The lens array (24) has a plurality of lens elements (25) which corresponds to the plurality of dot light sources respectively. An angular aperture θ of each of the lens elements (25) is set in a range of about 14° to 18°.
摘要:
There is provided an image exposure device in an image recording apparatus which has a simple and compact structure without requiring relatively high assembling accuracy. The light source portion 204 is formed with the plurality of LED chips 208 being arranged in groups. These LED chips 208 which emit light of colors of blue (B), green (G), and R (red) (when described below for each of the colors, the LED chip which emits light of blue is referred to as B-LED chip 208B, the LED chip which emits light of green is referred to as G-LED chip 208G, and the LED chip which emits light of red is referred to as R-LED chip 208R) are mounted onto a substrate 210 along the transverse direction of the photosensitive material 106 (i.e., the main scanning direction) in accordance with the same arrangement rule. Namely, the totaled six rows of LED chips 208 are arranged in a zigzag manner in the plan view of the substrate 210.
摘要:
A polarization-direction-controlling element comprising a 1/2 wavelength plate disposed with a crystal optical axis tilted at substantially 45 degrees with respect to a polarization direction of a beam of light separated by a polarization-separating element with a part of a laser beam transmitted, is provided on the optical path of the laser beam, outputted from a plurality of semiconductor lasers, between an outlet for the laser beams at a fiber array and a polarization-separating element for separating the laser beam into two beams of light having mutually orthogonal polarization directions. A polarization-direction-controlling element capable of improving the quality of recorded images in an exposing-recording device using an element with polarization dependency and an exposure device capable of improving the quality of recorded images can also be obtained.
摘要:
Es wird eine Einrichtung zur Bebilderung einer Druckform mit einem Array von Lichtquellen einer Abbildungsoptik zur Erzeugung von (n x m) Bildpunkten auf einer Druckform vorgeschlagen, welche sich dadurch auszeichnet, dass das Array von Lichtquellen ein Array von unabhängig voneinander ansteuerbaren VCSEL-Lichtquellen umfasst. Ein bestimmter Bildpunkt auf der Druckform kann durch die Zusammenführung des in einem Teilarray der VCSEL-Lichtquellen emittierten Lichtes entstehen. Aufgrund der vorteilhaften Strahleigenschaften der VCSEL-Lichtquellen, wie beispielsweise der geringen Divergenz und des geringen Astigmatismus, ist die Einrichtung zur Bebilderung von Druckformen besonders vorteilhaft zum Einsatz in einem Druckformbelicher oder einem Druckwerk geeignet.