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Design of lens cap shape used in bullet-type LED

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Purpose To minimize width of output angular intensity distribution

  • Initial shape of the lens cap of an LED (overview) Initial shape of the lens cap

    The side face of the lens cap is straight.

  • Final shape of the lens cap of an LED (overview) Final shape of the lens cap

    The side face of the lens cap is a bit slanted.

  • Output distributions created by the LEDs with initial and final shape of the lens cap Comparison of output distributions: initial and final

    (Upper) Output distributions created for the initial shape.
    (Lower) Output distributions created for the final shape. The sharper emission is gained.

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