| 摘要 |
PURPOSE:To reduce an error in temperature measurement by correcting detected temperature due to a difference in detection sensitivity among elements of a multi-element infrared detector. CONSTITUTION:Detection output voltages from the respective elements 4-1-4-n of the multi-element detector 4 are passed through amplifiers 6-1-6-n, a multiplexer 7, and an A/D converter 8 to become digital signals, which are inputted to a ROM 13 in order. The ROM 13 reads a temperature value corresponding to the detection output voltage of the element 4-1 out of the reference table of the element 4-1 which is stored and outputs it to a multiplier 14. In this case, a correction coefficient is set to 1. Further, the ROM 13 reads temperature values and correction coefficients corresponding to the detection output voltages of other elements 4-1-4-n out of the reference table and outputs them to the multiplier 14. The multiplier 14 multiplies the temperature values of the reference table by the correction coefficients and corrects detection sensitivity errors of the respective elements. Thus, the correction coefficient of each element of the detector 4 is found to correct its detection element, thereby reducing errors in temperature measurement.
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