Thermal detector with bolometric effect amplification
First Claim
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1. Thermal detector for measuring heat from a scene, characterized in that it comprises:
- a resistive heat amplifying element (4;
22, 24) able to undergo a heating from said scene and provided with electrical biasing means (6, 8;
26, 28) for causing the element to amplify said heating, a thermometer (12;
34, 36;
40, 42, 44, 46;
51, 52, 54;
60, 62) thermally coupled to the resistive heat amplifying element and able to convert a temperature variation undergone by said thermometer into an electric signal, said thermometer receiving and measuring amplified heat from said scene via said resistive heat amplifying element, said heat amplifying element amplifying heat input to said thermometer proportionately to heat from the scene, and means (18) for reading said electric signal.
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Abstract
This detector has a resistive element (4) able to undergo heating which is provided with electrical biasing means (6, 8) for amplifying or increasing the heating, a thermometer (12) thermally coupled to the element and converting a temperature variation undergone by the thermometer into an electric signal, and a device (18) for reading the electric signal. The invented detector can be applied to measure and detect infrared radiation. The detector can also be applied to measure and detect radiation of different wavelengths.
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Citations
13 Claims
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1. Thermal detector for measuring heat from a scene, characterized in that it comprises:
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a resistive heat amplifying element (4;
22, 24) able to undergo a heating from said scene and provided with electrical biasing means (6, 8;
26, 28) for causing the element to amplify said heating,a thermometer (12;
34, 36;
40, 42, 44, 46;
51, 52, 54;
60, 62) thermally coupled to the resistive heat amplifying element and able to convert a temperature variation undergone by said thermometer into an electric signal, said thermometer receiving and measuring amplified heat from said scene via said resistive heat amplifying element, said heat amplifying element amplifying heat input to said thermometer proportionately to heat from the scene, andmeans (18) for reading said electric signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification