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Lens assembly for sideward light emission

  • US 7,319,244 B2
  • Filed: 04/04/2006
  • Issued: 01/15/2008
  • Est. Priority Date: 04/12/2005
  • Status: Active Grant
First Claim
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1. A lens assembly for sideward light emission, comprising:

  • a lens defining a central axis, and havinga cup portion adapted to surround a light source that is disposed on the central axis,an open end portion opposite to said cup portion in a direction of the central axis, surrounding the central axis, and defining an opening,a first refracting portion surrounding the central axis, and interconnecting said cup portion and said open end portion, anda second refracting portion disposed in said lens and formed on said first refracting portion; and

    a lens cap mounted to said open end portion of said lens for covering said opening,wherein a first portion of light emitted by the light source is incident on and is reflected by said lens cap to said first refracting portion of said lens, and is refracted by said first refracting portion of said lens such that the first portion of light exits said lens in lateral directions relative to the central axis, andwherein a second portion of light emitted by the light source is refracted by said second refracting portion of said lens, is internally reflected by said first refracting portion of said lens, and is refracted by said first refracting portion of said lens such that the second portion of light exits said lens in lateral directions relative to the central axis.

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