An infrared detection countermeasure system for a target object, the system comprising: a screen, formed of at least one thermoelectric cooler, unit (5, 7, 31, 62), couplable to a target object; a controller for controlling individually each said TEC unit (5, 7, 31, 62); a sensor for measuring temperature of one side of said TEC unit and temperatures of distant objects; and a power source coupled to each said TEC unit (5, 7, 31, 62); wherein said controller is coupled to said power source for causing said power source to provide a level of power, selected in accordance with said temperature indication, to each said TEC unit (5, 7, 31, 62), so as to generate a selected temperature in at least part of said screen; said TEC unit (5, 7, 31,62) including a TEC module (2, 5, 7, 31, 39, 62) coupled to a metal plate (1, 36) that is substantially larger than said TEC module (2, 5, 7, 31, 39, 62); characterised by the sensor being a thermal imaging camera a system for compensating for emissivity of said at least one TEC unit (5, 7, 31, 62), so as to provide a thermal signature substantially the same as that of an ambient, distant object, the system including: a temperature measuring unit which includes: an electrical rotating motor cam, controlled by said controller, coupled to said thermal imaging camera; and a temperature control unit which includes: a control unit coupled to said a motor and said controller 64; wherein said camera is configured to measure a temperature of said distant object and provide an electrical signal corresponding to radiometric output of said temperature to controller, and then to rotate to a second position for measuring an actual observed temperature of said at least one TEC unit (5, 7, 31, 62), and report the observed temperature to controller; and said controller is configured to activate said power unit to heat said at least one TEC unit (5, 7, 31, 62) to a corresponding measured temperature of object, to compare said measured temperatures of the object and the at least one TEC unit and adjust the temperature of TEC unit (5, 7, 31, 62), by providing current through power unit, so that the temperature radiated from said at least one TEC unit (5, 7, 31, 62) towards a viewer will be substantially equal to that of object. a screen, formed of at least one thermoelectric cooler, unit (5, 7, 31, 62), couplable to a target object; a controller for controlling individually each said TEC unit (5, 7, 31, 62); a sensor for measuring temperature of one side of said TEC unit and temperatures of distant objects; and a power source coupled to each said TEC unit (5, 7, 31, 62); wherein said controller is coupled to said power source for causing said power source to provide a level of power, selected in accordance with said temperature indication, to each said TEC unit (5, 7, 31, 62), so as to generate a selected temperature in at least part of said screen; said TEC unit (5, 7, 31,62) including a TEC module (2, 5, 7, 31, 39, 62) coupled to a metal plate (1, 36) that is substantially larger than said TEC module (2, 5, 7, 31, 39, 62); characterised by the sensor being a thermal imaging camera a system for compensating for emissivity of said at least one TEC unit (5, 7, 31, 62), so as to provide a thermal signature substantially the same as that of an ambient, distant object, the system including: a temperature measuring unit which includes: an electrical rotating motor cam, controlled by said controller, coupled to said thermal imaging camera; and a temperature control unit which includes: a control unit coupled to said a motor and said controller 64; wherein said camera is configured to measure a temperature of said distant object and provide an electrical signal corresponding to radiometric output of said temperature to controller, and then to rotate to a second position for measuring an actual observed temperature of said at least one TEC unit (5, 7, 31, 62), and report the observed temperature to controller; and said controller is configured to activate said power unit to heat said at least one TEC unit (5, 7, 31, 62) to a corresponding measured temperature of object, to compare said measured temperatures of the object and the at least one TEC unit and adjust the temperature of TEC unit (5, 7, 31, 62), by providing current through power unit, so that the temperature radiated from said at least one TEC unit (5, 7, 31, 62) towards a viewer will be substantially equal to that of object. a temperature measuring unit which includes: an electrical rotating motor cam, controlled by said controller, coupled to said thermal imaging camera; and an electrical rotating motor cam, controlled by said controller, coupled to said thermal imaging camera; and a temperature control unit which includes: a control unit a control unit coupled to said a motor and said controller 64; wherein said camera is configured to measure a temperature of said distant object and provide an electrical signal corresponding to radiometric output of said temperature to controller, and then to rotate to a second position for measuring an actual observed temperature of said at least one TEC unit (5, 7, 31, 62), and report the observed temperature to controller; and said controller is configured to activate said power unit to heat said at least one TEC unit (5, 7, 31, 62) to a corresponding measured temperature of object, to compare said measured temperatures of the object and the at least one TEC unit and adjust the temperature of TEC unit (5, 7, 31, 62), by providing current through power unit, so that the temperature radiated from said at least one TEC unit (5, 7, 31, 62) towards a viewer will be substantially equal to that of object.