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Thermal condensate reducer for optical devices

  • US 6,866,391 B2
  • Filed: 10/22/2002
  • Issued: 03/15/2005
  • Est. Priority Date: 11/14/2001
  • Status: Expired due to Fees
First Claim
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1. A system for reducing water vapor condensation on an optical surface that is subject to condensation comprising;

  • a first temperature sensor for measuring the surface temperature of said optical surface;

    a second temperature sensor for measuring the ambient temperature of the air surrounding said optical surface;

    a comparator for comparing said first temperature sensor to said second temperature sensor and establish a temperature differential from said comparison;

    a heating element to transfer heat to said optical surface;

    a controller to regulate said heating element by establishing a temperature setpoint and a thermostatic range for the optical surface based upon said temperature differential.

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