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    Optics


       

     

      Lenses

      The JumboScan™ camera uses a range of three lenses (made by Rodenstock or Schneider) to accommodate object size, depth of field and resolution requirements. 

      The Schneider lenses have six elements and a larger angle made possible without any loss in imaging quality by the use of special glass types.  Operators can change F-stop settings in a few seconds by reaching up under the camera and rotating the F-stop ring.

      The following lenses are available for the JumboScan Model Camera:

      • 80mm 1:1
      • 120mm 1:1
      • 150mm normal
      • 210mm telephoto
      • 300mm telephoto

     

         Our lenses have been developed and manufactured  in Germany.

    • The resolving power is very high, not just at the centre but also at the edges and in the corners (modular transfer).
    • The reproduction quality is constant with no visible loss, even with huge enlargements.
    • The almost total elimiation of diffused light ensures en excellent level of contrast.
    • Closing the lens down by two stops from the maximum aperture ensures no vignetting and an even distribution of light.
    • There is no perceptible distortion.
    • Light transmission is 96% guaranty.
       

    We must keep in mind that the EMQ (Average Quadratic Error), is less than 0.005 %, this mean the maximum error of acurracy is 50 microns on 1 meter !

    JUMBOSCAN can use many lenses depending on the kind of document.

    Whatever lens you presently use, we can offer better

    Standard
    150 mm

    Apochromatic
    150 mm

    Wide Angle
    120 mm

    Large Format
    210 mm

    The 80/108/135/150 mm lenses are recommanded for their excellent geometry (enlarging from 2 to 10 x).

    There are 80/105/150 mm apochromatic lenses (enlarging from to 15 x).

    This 120 mm lens enlarge from 4 up to 15 x.

    The 150 and 210 mm lenses are recognized for their "large format" geometry (enlarging from 10 to 40 x).

     

      Optical Aberration

      There is no perceivable geometric distortion.  The resolving power is very high in the center and in the corners and the virtual elimination of diffused light ensures an excellent level of contrast.  Even at small apertures, such as f16, even light distribution ensures no vignetting.  Modular Transfer Function (MTF) curves and diagrams are available on special request. The color scanning is limited to 17,000 lines to perform a perfect pixel registration.

     

      Focus

     

     

      Operators utilize PhotoShop Plug-in software to accomplish automatic, semi-automatic and manual focus adjustment at up to 1/400th of an inch.

     

      Depth of Field

     

      Because of the brilliance of JumboLux lighting and the sensitivity of the monolinear CCD array, the lens may be stopped down from F8, through F11 to F16, to yield greater depth of field that can range from 0.08 inches to 57.92 inches (at F16 using the 150mm lens).  In another example, the depth of field is 1.43 inches for an A0 drawing scanned at 200 DPI at F11 using the 150mm lens.

     



      This website does not contain any contractual terms. Specifications and functionality  mentioned
      in this document are subject to change. Jumboscan and Jumbolux are registered trademarks by
      Lumiere Technology LT2 S.A.S.