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Light barrier optical module

  • US 6,348,685 B1
  • Filed: 03/11/1999
  • Issued: 02/19/2002
  • Est. Priority Date: 03/11/1998
  • Status: Expired due to Fees
First Claim
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1. An optical module for a light barrier, comprising:

  • at least one of an optoelectronic emission component and an optoelectronic reception component;

    an optical transmission device configured to focus the light, centered on an optical axis, and having an useful optical area with diameter D1 around the optical axis;

    a rear wall defining a rear wall orifice centered on the optical axis, the rear wall orifice having an diameter D3 around the optical axis wherein D3<

    D1; and

    a diaphragm positioned to block reflected light within a chosen reflection zone and comprising a first partition defining a first partition orifice centered on the optical axis between the rear wall and the transmission device, the first partition orifice having a diameter D2A wherein D3<

    D2A<

    D1.

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