No assignee for this patent application has been made.
Reporters obtained the following quote from the background information supplied by the inventors: "The present invention relates to an imaging system, a print head, an image forming apparatus, and an image scanner, and more particularly to, an imaging system, a print head having the imaging system, an image forming apparatus and an image scanner.
"With the increasing sophistication of information processing apparatuses, demand has grown for laser printers and copiers for small offices and home offices (SOHO).
"These laser printers and copiers include an exposing device, which is configured as, for example, a print head having a light source and a lens array, in which the light source includes a plurality of light emitting elements such as a light emitting diode (LED) array or an organic electro luminescence (OEL) array. The exposing device can be configured using a semiconductor laser and a polygon scanner. The print head can be compact compared to a combination of the semiconductor laser and polygon scanner.
"JP-2000-108405-A, JP-2000-108403-A, JP-H04-336559-A, JP-S63-225218-A, JP-H10-153751-A, and JP-4574063-B (JP-2002-350604-A) disclose various optical systems used for the print head. However, image forming apparatuses using conventional print heads have difficulty satisfying the demand for improved image quality."
In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventor's summary information for this patent application: "One aspect of the present disclosure provides an imaging system that includes an incidence face having a plurality of optical faces formed along a first axis with a first pitch; a prism face having a plurality of grooves formed along the first axis with a second pitch different from the first pitch, being disposed on an optical path of light coming from the incidence face; and an exit face having a plurality of optical faces formed along the first axis with a third pitch, being disposed on an optical path of light coming from the prism face. Each one of the optical faces of the incidence face and each one of the optical faces of the exit face are aligned at the same position of the first axis. A virtual plane extends from an end of the one optical face of the incidence face in the first axis to an end of the one optical face of the exit face in the first axis. Among light flux emitted from a spot light source and entering the one optical face of the incidence face, a light beam that passes over the virtual plane is reflected at the prism face, and passes over the virtual plane again and goes to the one optical face of the exit face.
BRIEF DESCRIPTION OF THE DRAWINGS
"A more complete appreciation of the disclosure and many of the attendant advantages and features thereof can be readily obtained and understood from the following detailed description with reference to the accompanying drawings, wherein:
"FIG. 1 shows a schematic configuration of an image forming apparatus according to an example embodiment;
"FIG. 2 shows a schematic configuration of a print head;
"FIG. 3 shows a schematic configuration of a light source of a print head;
"FIG. 4 shows a schematic configuration of a light source having a plurality of LED arrays and drive-IC chips;
"FIG. 5 shows a schematic perspective view of an imaging system of a print head;
"FIG. 6 shows a schematic cross-sectional view of the imaging system cut on a XZ plane;
"FIG. 7 shows a schematic view of incidence optical faces of the imaging system;
"FIG. 8 shows a schematic view of exit optical faces of the imaging system;
"FIG. 9 shows a schematic view of effect of a prism face;
"FIGS. 10 and 11 show schematic views of the prism face having a given shape;
"FIG. 12 shows an optical path passing through the imaging system viewed from one direction;
"FIG. 13 shows an optical path passing through the imaging system viewed from another direction;
"FIG. 14 shows an optical path passing through an imaging system of comparison example;
"FIG. 15 shows example parameters for setting a given shape for the incidence optical face;
"FIGS. 16, 17, 18 and 19 show simulation results;
"FIG. 20 shows a relationship of a prism face pitch, light intensity at a signal area and light intensity at a ghost area;
"FIG. 21 shows a diffusing face or an absorbing face from one direction;
"FIG. 22 shows a diffusing face or an absorbing face viewed from another direction;
"FIG. 23 shows an effect of the diffusing face;
"FIG. 24 shows a schematic configuration of an image scanner.
"The accompanying drawings are intended to depict exemplary embodiments of the present invention and should not be interpreted to limit the scope thereof. The accompanying drawings are not to be considered as drawn to scale unless explicitly noted, and identical or similar reference numerals designate identical or similar components throughout the several views."
For more information, see this patent application: IMAI, Shigeaki. Imaging System, Print Head, Image Forming Apparatus, and Image Scanner. Filed
Keywords for this news article include: Patents, Electronics, Semiconductor.
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