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    參數(shù)資料
    型號(hào)： HSDL-3021-021
    廠商： Avago Technologies Ltd.
    英文描述： IrDA㈢ Data Compliant Low Power 4.0 Mbit/s with Remote Control Infrared Transceiver
    中文描述： 紅外線㈢數(shù)據(jù)兼容低功耗4.0 Mbit / s的紅外遙控器
    文件頁(yè)數(shù)： 22/26頁(yè)
    文件大?。?/td> 205K
    代理商： HSDL-3021-021
    22
    Shape of the Window
    From an optics standpoint, the
    window should be flat. This
    ensures that the window will not
    alter either the radiation pattern
    of the LED, or the receive pattern
    of the photodiode. If the window
    must be curved for mechanical or
    industrial design reasons, place
    the same curve on the backside of
    the window that has an identical
    radius as the front side. While this
    will not completely eliminate the
    lens effect of the front curved
    surface, it will significantly reduce
    the effects. The amount of change
    in the radiation pattern is
    dependent upon the material
    chosen for the window, the radius
    of the front and back curves, and
    the distance from the back surface
    to the transceiver. Once these
    items are known, a lens design
    can be made which will eliminate
    the effect of the front surface
    curve. The following drawings
    show the effects of a curved
    window on the radiation pattern.
    In all cases, the center thickness
    of the window is 1.5 mm, the
    window is made of polycarbonate
    plastic, and the distance from the
    transceiver to the back surface of
    the window is 3 mm.
    Flat Window
    (First Choice)
    Curved Front, Flat Back
    (Do not use)
    Curved Front and Back
    (Second Choice)
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