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LIGHTING SYSTEM

  • US 3,665,179 A
  • Filed: 01/24/1969
  • Issued: 05/23/1972
  • Est. Priority Date: 05/28/1968
  • Status: Expired due to Term
First Claim
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1. A lighting system comprising:

  • a housing, a primary light source, a concave mirror for producing a secondary light source in the form of a virtual image of the said primary light source substantially spaced from said primary light source, said mirror being coated with a light-reflecting and heattransmitting material, a projection lens having its rear focal point substantially in a plane containing said virtual image for projecting a beam of light energy radiated by said secondary light source, said lens being substantially ineffective in projecting light energy radiated from said primary light source, said concave mirror, primary light source and projection lens being centered, respectively one behind another on a common optical axis within the said housing, and wherein the said light-reflecting and heat-transmitting material reflects only a minor proportion of the infrared energy radiated by said primary light source.

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