Forensic light using semiconductor light source

  • US 7,252,678 B2
  • Filed: 04/22/2005
  • Issued: 08/07/2007
  • Est. Priority Date: 09/24/1999
  • Status: Expired due to Term
First Claim
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1. A semiconductor forensic light comprising:

  • a housing having a proximal end, a distal end, a top, a bottom and an interior,control circuitry located in said housing interior,said control circuitry being able to control on/off and power intensity selection functions of the forensic light,a power level selection button located on said housing, said power level selection button accommodating the increase and decrease of light output levels from the forensic light,said power level selection button being in operable communication with said control circuitry,a trigger on said housing, said trigger serving to accommodate initiation and terminate of light emission from the forensic light,said trigger being constructed so that it will automatically terminate light transmission of a human finger engaged in actuating the trigger is removed from the trigger,said trigger being in operable communication with said control circuitry,a power pack located at said housing proximal end for providing electrical power to the forensic light, a light head located at said housing distal end,a light source within said light head,said light source includinga semiconductor light emitting device that can emit light of a wavelength useful in detecting forensic evidence,a primary heat sink to which said semiconductor light emitting device is affixed, said primary heat sink serving to draw heat away from said semiconductor light emitting device,a thermoelectric cooler located adjacent said primary heat sink, said thermoelectric cooler experiencing a drop in temperature when exposed to an electrical voltage,a secondary heat sink to which said primary heat sink is affixed, said secondary heat sink serving to dissipate heat produced by said semiconductor light emitting device,a fan serving to move air past at least one of said heat sinks in order to cool the light source,at least one ventilation aperture on said light head for permitting air to enter and exit the light head to facilitating heat dissipation, andat least one light exit on said light head, said light exit being sized and shaped to permit light to exit said light head for use in detecting forensic evidence.

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