Radiation detector having improved accuracy
DCFirst Claim
Patent Images
1. A radiation detector comprising:
- a thermopile having a hot junction and a cold junction, the hot junction being mounted to view a target;
a temperature sensor for sensing the temperature of the cold junction;
an electronic circuit coupled to the thermopile and responsive to the voltage across the thermopile and a temperature sensed by the temperature sensor to determine the temperature of the target, the electronic circuit determining the temperature of the target as a function of the voltage across the thermopile and the temperature of the hot junction of the thermopile determined from the cold junction temperature and a thermopile coefficient; and
a display for displaying an indication of the temperature of the target determined by the electronic circuit.
4 Assignments
Litigations
0 Petitions
Reexamination
Accused Products
Abstract
Tympanic temperature measurements are obtained from the output of a thermopile mounted in an extension from a housing. The housing has a temperature display thereon and supports the electronics for responding to sensed radiation. The thermopile is mounted in a highly conductive can which includes a radiation guide and thermal mass. The guide provides a narrow field of view due to a fairly high emissivity. Electronics determine the target temperature as a function of the temperature of the hot junction of the thermopile determined from the cold junction temperature and a thermopile coefficient. The tympanic temperature is adjusted to provide an indication of core temperature.
97 Citations
8 Claims
-
1. A radiation detector comprising:
-
a thermopile having a hot junction and a cold junction, the hot junction being mounted to view a target; a temperature sensor for sensing the temperature of the cold junction; an electronic circuit coupled to the thermopile and responsive to the voltage across the thermopile and a temperature sensed by the temperature sensor to determine the temperature of the target, the electronic circuit determining the temperature of the target as a function of the voltage across the thermopile and the temperature of the hot junction of the thermopile determined from the cold junction temperature and a thermopile coefficient; and a display for displaying an indication of the temperature of the target determined by the electronic circuit. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A radiation detector comprising:
-
a thermopile mounted to view a target of biological surface tissue; a temperature sensor for sensing ambient temperature; an electronic circuit coupled to the thermopile and temperature sensor and responsive to the voltage across the thermopile and the temperature sensed by the sensor to provide an indication of an internal temperature within the biological tissue adjusted for the ambient temperature to which the surface tissue is exposed; and a display for providing an indication of the internal temperature. - View Dependent Claims (8)
-
Specification