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Combined infrared filter and light focusing apparatus for a mercury vapor lamp

  • US 4,000,407 A
  • Filed: 04/07/1975
  • Issued: 12/28/1976
  • Est. Priority Date: 04/07/1975
  • Status: Expired due to Term
First Claim
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1. Apparatus for filtering and focusing light directed from a high intensity light source toward an object comprising areflector partially surrounding the light source on its side opposite to the object, means for filtering infrared radiation from the illumination and simultaneously refracting the illumination towards the object to be illuminated, the means for filtering and refracting including a liquid coolant-filter, hollow, transparent means, including a plurality of transparent, elongated hollow tubes aligned parallel to the length of the light source, interposed between the light source and the object for containing the liquid coolant-filter, and means for circulating the liquid coolant-filter in the hollow, transparent means.

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