Abstract:
An image reading apparatus having a light guide unit with a light source for applying light to an image reading surface, and a board provided with a photoelectrical conversion element for photoelectrically converting light reflected from the image reading surface into an electrical signal, wherein the light guide unit is supported by the board by making the light guide unit in contact with the board.
Abstract:
Provided is an image scanning unit which makes it possible to improve scanning accuracy while also making the overall body thinner by appropriately positioning a plurality of reflection members within an effective space in a carriage frame without wasting space. An image scanning unit, wherein a frame is divided into at least two spaces facing an irradiation surface, a first accommodation unit for accommodating a light source unit is formed in one of the spaces, a second accommodation unit for accommodating at least one reflection member is formed in the other adjacent space, a first reflection member for initially receiving light reflected from the irradiation surface is positioned at the side opposite the irradiation surface with the first accommodation unit positioned therebetween, and a light-shielding member is provided between the first reflection member and the reflection member positioned in the other space and prevents light that has strayed from a scanning light path from the first reflection member from being incident on the reflection member in the other space.
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:
This specification discloses a lens array having a lens element body comprising 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 discloses 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:
An image sensor unit performs image reading by reflected light and image reading by transmitted light with respect to a bill, and includes a reflection reading light guide that emits light from a reflection reading light source toward the bill, a transmission reading light guide that emits light from a transmission reading light source toward the bill, an imaging element that focuses light from the bill, and a light receiving element that receives light that is collected by the imaging element. The transmission reading light source and the transmission reading light guide are disposed on the opposite side of a conveyance path through which the bill can pass, for the reflection reading light source and the reflection reading light guide, and a light blocking member that blocks a part of the light from the reflection reading light guide is disposed between the reflection reading light guide and the transmission reading light guide.
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 stray light baffle (10) for reducing an amount of stray light (70) and (70') incident on a detector (50) may comprise a main body portion (60) and a mounting pad portion (62). The mounting pad portion (62) is affixed to a mounting surface (88) with a light curable adhesive (86). The stray light baffle (10) substantially blocks stray light (70) and (70') and substantially transmits curing light. The mounting surface (88) is located adjacent the detector (50) so that the main body portion (60) of the stray light baffle (10) is interposed between the detector (50) and a source of stray light (70) and (70') when the stray light baffle (10) is mounted to the mounting surface (88).
Abstract:
This specification discloses a lens array having a lens element body comprising 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 discloses 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 a semiconductor device that ensures high linearity as a threshold voltage follows an input amplitude.SOLUTION: The semiconductor device includes: a first transimpedance amplifier for converting a first current signal generated by a first photodiode into which an optical signal is input to a first voltage signal; a second transimpedance amplifier for converting a second current signal generated by a second photodiode to which an optical signal is blocked to a second voltage signal; a peak hold circuit for holding a peak value of the first voltage signal; a comparator for outputting a pulse on the basis of the first and second voltage signals; and a threshold current setting circuit for drawing a threshold current proportional to a reference current generated from a differential voltage between the peak voltage output from the peak hold circuit and a reference voltage at an output node of the second photodiode, from between the second photodiode and the second transimpedance amplifier.
Abstract:
PROBLEM TO BE SOLVED: To provide a contact image sensor capable of ensuring the received light quantity of a light receiving element without increasing the light quantity of a light source. SOLUTION: The contact image sensor includes: a housing 3; LED line illumination devices 40 and 41 for irradiating a document 1 with light; cylindrical lenses 6a and 6b arranged in the grooves 5 provided in the housing 3 for image-forming reflected light from the reading position A of the document 1; an aperture angle regulation member 8 having a slit part 7 for regulating the aperture angle of the cylindrical lens 6a by covering the cylindrical lens 6a for making the reflected light be incident directly; and a light receiving element array 11 for receiving and photoelectrically converting the reflected light image-formed by the cylindrical lenses 6a and 6b. Then, by providing a mirrored surface part 9 on the inclined surface of the aperture angle regulation member 8, a part of the light irradiated from the LED line illumination devices 40 and 41 is reflected at the reading position A of the document 1. COPYRIGHT: (C)2009,JPO&INPIT