Abstract:
A lighting device includes a light source that illuminates an object of illumination, a reflecting member provided opposite the light source so as to direct a first part of illuminating light emitted therefrom to the object of illumination, and a light-blocking member provided between the light source and the object of illumination and between the reflecting member and the object of illumination. The light-blocking member blocks the first directed part of the illuminating light and a second part of the illuminating light directly illuminating the object of illumination with a certain ratio of a light-blocking rate for the first directed part of the illuminating light to a light-blocking rate for the second directly illuminating part of the illuminating light.
Abstract:
A lens array unit includes first and second lens arrays cooperative with each other. The first lens array is provided with a plurality of first convex lenses and a first transparent holder formed integral with the first lenses. Each of the first lenses has first and second lens surfaces. The second lens array is provided with a plurality of second convex lenses and a second transparent holder formed integral with the second lenses Each of the second lenses has third and fourth lens surfaces. The second lens array is attached to the first lens array so that the third lens surfaces face the second lens surfaces. The lens array unit further includes a light shield mounted on the first lens array. The light shield is formed with a plurality of through-holes each facing the relevant one of the first lens surfaces.
Abstract:
In an image reading device in which an original is illuminated by a light source, and a reflected beam from the original is imaged on a sensor through a rod lens array, a light-shielding member is arranged between the beam exit surface of the light source and the incident surface of the rod lens array to prevent the beam from the light source from being directly incident on the rod lens array to cause a flare. An image reading device and information processing apparatus in which the image quality is rarely degraded by the flare beam are provided.
Abstract:
A stray light baffle for reducing an amount of stray light incident on a detector may comprise a main body portion and a mounting pad portion. The mounting pad portion is affixed to a mounting surface with a light curable adhesive. The stray light baffle substantially blocks stray light and substantially transmits curing light. The mounting surface is located adjacent the detector so that the main body portion of the stray light baffle is interposed between the detector and a source of stray light when the stray light baffle is mounted to the mounting surface.
Abstract:
This specification discloses a lens array having a lens element body having a plurality of lens elements arranged, and an overlap limiting member provided between the lens elements of the lens element body for limiting the overlap of images by the plurality of lens elements. The specification also discusses a close contact type image sensor which uses the lens array as an optical element array for directing reflected light from an original and which has a transparent member for supporting the original, a light source for illuminating the original, and a sensor array for photoelectrically converting the image of the original.
Abstract:
PROBLEM TO BE SOLVED: To provide an image reader capable of preventing flare light from getting into a reading means, making illuminance distribution constant with easy operation so as to align a peak light quantity position of the illuminance distribution with center of a reading area, and reading a clear image; and to provide an image forming apparatus equipped with the same. SOLUTION: A shielding member 42 isolating an original illuminating part 56 and an image reading part 54 is provided in a housing 41 so as to demarcate a second space 58 in which the image reading part 54 is housed, and reflection parts 48 and 49 for irradiating an irradiation area W1 of an original P with light from an LED unit 44 are provided on an upper surface of the shielding member 42, then a long-length slit 59 extending in a main scanning direction so as to guide the light reflected from the original P from a first space 57 to the second space 58 is provided thereon. Projections 67 fit in a groove 66 of the housing 41 and performing positioning of the original illuminating part 56 and the image reading part 54 are provided at both ends in a main scanning direction of the shielding member 42. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To obtain an image reading apparatus downsizing an integrated scanning optical system unit and also downsizing the entire apparatus. SOLUTION: When reading image information of a document by moving, in a sub-scanning direction, an integrated scanning optical system unit integrally housing therein: a plurality of mirrors for reflecting light flux from the document illuminated with light flux of a light source means; an image forming optical system for image-forming the light flux reflected on the plurality of mirrors; and a reading means in which a plurality of reading pixels are disposed in a main scanning direction, light flux is made incident at 2° or more on at least one mirror among the plurality of mirrors, and within a sub scanning cross section, reflection planes of the plurality of mirrors are disposed within a space at a document reading position side rather than a light incidence plane of the image forming optical system. A reflection plane of the mirror disposed optically most closely to the light incidence plane of the image forming optical system is disposed in the most distant position, in the normal direction, from an original platen in comparison with the reflection planes of the other mirrors. COPYRIGHT: (C)2009,JPO&INPIT