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Optical components for an I.V. flow detector

  • US 5,267,980 A
  • Filed: 08/29/1990
  • Issued: 12/07/1993
  • Est. Priority Date: 08/29/1990
  • Status: Expired due to Fees
First Claim
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1. In a drop detector comprising:

  • (1) emitter means for providing em. radiation;

    (2) receiver means for, upon the receipt of said em. radiation, providing a characteristic electrical signal;

    (3) retaining means, coupled to said emitter means and said receiver means, for holding a drip chamber composed of a material with a specified index of refraction and general shape through which drops of a liquid pass; and

    (4) optical means, coupled to said retaining means, for altering the path of said em. radiation from said emitter means through a particular drip chamber held by said retaining means and to said receiver means,the improvement wherein said optical means places the em. radiation from said emitter means, prior to its entry into said particular chamber, in a direction that will result in the em. radiation being collimated when travelling in the interior of said particular chamber.

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