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    • 61. 发明专利
    • OPTICAL IMAGE READER
    • JPS61202565A
    • 1986-09-08
    • JP4417285
    • 1985-03-06
    • CANON KK
    • YAMANOBE MASATOKAWAI TATSUTOOGURA MAKOTOHIDAKA KUNIYUKI
    • H04N1/04G06K9/20G06T1/00H04N1/12
    • PURPOSE:To obtain a small sized reader with high quality image by aligning the optical system taking a curvature restricting an original face and the thickness of an original into account so as to apply image read with almost uniform resolution over an image read region. CONSTITUTION:Alignment is applied by shifting an object point OP on an optical axis L, that is, a conjugating point of an image point IP to the remotest point F from the nearest point N to a converging light transmission array 6 by DELTAT on the read range. Preferably, the converging light transmission array 6 is arranged so that the object point OP is positioned at the intermediate point between the point N and a cross point F' between an optical axis L and a perpendicular line from the point F to the optical axis L. The entire reader has only to be moved and adjusted to a platen roller 50 with an image reader section 66 where the relation of position between the converging light transmission array 6 and an image sensor 8 is preset so as to keep a suitable distance being a half of the conjugate length Tc and arranged to a light shield hood 70.
    • 62. 发明专利
    • LED ARRAY
    • JPS60230623A
    • 1985-11-16
    • JP8611884
    • 1984-05-01
    • CANON KK
    • KAWAI TATSUTO
    • G03B27/54F21V5/00G02B27/00G03G15/04G03G15/043H04N1/04
    • PURPOSE:To illuminate a photodetection surface over a wide area to high illuminance by using a distributed index lens as a condenser lens for the LED array which includes the condenser lens arranged adjacently to a substrate. CONSTITUTION:This invented LED array uses the prismatic distributed index lens as the condenser lens 6 differently from a conventional lens. The refractive index of this condenser lens 6 is uniform in the optical axis direction of the LED array and in its lengthwise direction and a square-law distribution in obtained at right angles to said two directions. Then, light beams emitted by LED chips 2 travel zigzag in the distributed index lens 3 and form an erect image of unmagnification on a photodetection surface 5. In this case, the LED chips and photodetection surface bear a relation of an erect image and unmagnification conjugate surface, so even if the distributed index lens 3 shifts in position finely by DELTA during the assembly, there is no shift in illuminated position and high illuminance is obtained on the photodetection surface over a wide area.
    • 63. 发明专利
    • CONTACT IMAGE SENSOR
    • JPS60218616A
    • 1985-11-01
    • JP7490284
    • 1984-04-16
    • CANON KK
    • SHIRATO YOSHIAKIKIYOFUJI SHINICHIKAWAI TATSUTO
    • G02B27/00H04N1/04
    • PURPOSE:To make the constitution compact on the whole by setting the angle between the incidence axis of light to an original surface and the optical axis of a lens array with a large degree of freedom. CONSTITUTION:A reflecting mirror 7 is installed between the original surface 4 and an LED array part 2 adjacently to a distributed index lens array 5. Light emitted from the LED chip 2 as a spot light emission source strikes the reflecting mirror 7 through a cylindrical lens 3 and is reflected there to illuminate the original surface 4. Light reflected from an image on the original surface 4 is passed through the distributed index lens array 5 to form an image on a photoconductive conversion part 6. In this arrangement, the light from the LED array part 2 is only made incident on the reflecting mirror 7 installed adjacently to the lens array 5, so the LED array part 2 is installed without any consideration to interference with the lens array 5.
    • 65. 发明专利
    • LED ARRAY
    • JPS60147177A
    • 1985-08-03
    • JP181984
    • 1984-01-11
    • CANON KK
    • KAWAI TATSUTO
    • G02B27/00H01L25/075H01L33/58H01L33/60H01L33/62H01L33/64H04N1/04
    • PURPOSE:To obtain a LED array having a wide region, in which high illuminance is acquired on a light-receiving surface, and high illuminance obtained at the peak of light-receiving surface illuminance distribution by mounting a reflecting means near a LED chip. CONSTITUTION:LED chips 2 are arranged in the longitudinal direction of a tabular substrate 1 at regular intervals, and supporters 4 supporting a cylindrical condenser lens 3 are mounted oppositely on both sides of the substrate 1. Reflecting means 5 formed by trigonal prism-shaped glass in order to be mutually brought into contact with the substrate 1 and the supporters 4 are fitted on both sides of the LED chips 2. A reflecting surface 6 for the reflecting means 5 is formed in such a manner that a reflecting plate 5 is abraded and aluminum is vacuum-evaporated. Luminous flux projected to the sides from the LED chips 2 is reflected by the reflecting surfaces 6 for the reflecting means 5, passes by the central section of the condenser lens 3, and is condensed where slightly displaced from the center of a light-receiving surface 10.