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Light-emitting-diode (LED) with spherical lens

  • US 4,841,344 A
  • Filed: 12/07/1987
  • Issued: 06/20/1989
  • Est. Priority Date: 09/13/1985
  • Status: Expired due to Fees
First Claim
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1. A light-emitting diode apparatus, comprising:

  • spherical lens means for radiation concentration secured to a light-emitting diode by means of adhesive;

    said light-emitting diode having a semiconductor body with a luminescent zone which has a shape of a spot;

    the luminescent zone being situated closer to one surface of said semiconductor body than an opposite surface thereof;

    the opposite surface having a mesa with a circular mesa surface, the circular mesa surface being positioned in adjusted and centered fashion opposite the luminescent zone of the diode;

    the spherical lens means being arranged on the circular mesa surface, and being aligned and retained in self-centered fashion on the mesa surface by the adhesive;

    a diameter of the circular mesa surface being dimensioned of a comparable size to a diameter of such that the spherical lens is self-centered by a surface tension of the adhesive when viscous in combination with the mesa surface diameter.

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