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Method of shaping a lamp beam

  • US 4,142,229 A
  • Filed: 05/23/1977
  • Issued: 02/27/1979
  • Est. Priority Date: 05/23/1977
  • Status: Expired due to Term
First Claim
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1. A method of altering the photometric output and distribution of a lamp from an auxiliary automobile headlamp of the type having a fluted lens cover and wherein said lamp beam is directed outward from said lamp through its lens cover comprising the steps of covering a central portion of said lens cover with an opaque material and covering a peripheral portion of said lens cover with an opaque material whereby the resulting lamp beam conforms to certain specifications requiring said beam to have less than certain maximum outputs at certain angles referenced to said lamp and wherein said beam exceeds certain minimum outputs along a number of other angles referenced to said lamp to conform with SAE Standards J582a.

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