焦電効果を利用した赤外線検出器
1968 年 37 巻 2 号 p. 147-156
詳細
1968 年 37 巻 2 号 p. 147-156
Some peculiar performances of pyroelectric infrared detector and selection criteria of the ferroelectric material are discussed, and the basic characteristics of Triglycine Sulfate as an infrared detector are examined. A responsivity of 1.3×103V/W is easily obtainable at 10c/s chopping frequency at room temperature using a blackened TGS film of 50μm thickness and preamplifier whose input impedance is 1011 ohms. The value of NEP (500°K, 10c/s, lc/s) is found to be smaller than 5.6×10-10 W/(c/s)1/2 in evacuated detector mount. A comparison test shows that the detectivity of a TGS pyroelectric detector is about 3/4 of that of a usual Golay cell. On the other hand, it is demonstrated to be feasible to produce a quick response thermal detector so as to detect an approximate shape of Ruby Laser pulse.
