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国产TGS(硫酸三甘肽)和LiTaO_3(钽酸锂)探测器是近两年研制成功的热释电探测器。可用于可见、近红外和远红外的分光测量。为了精确地探测和研究辐射源的光潜能量分布,必须知道所用探测器的光谱响应,所以光谱响应是探测器的重要性能指标之一。探测器光谱响应的测量,一般多以热电偶作为无选择性探测器进行比较测量。但由于热电偶的光谱响应对所有波长并不都是常数,其相对光谱响应如图1所示,所以对比法测量有不足之处。本测量采用标准辐射源法直接测量和计算了TGS和LiTaO_3探测器在可见区和近红外区的光谱响应,并附带测量了光电倍增管和硅光电池的光谱响应,以资比较。
Domestic TGS (sulfuric acid three peptide) and LiTaO_3 (lithium tantalate) detector is developed in recent years pyroelectric detector. Can be used for visible, near-infrared and far-infrared spectroscopic measurements. In order to accurately detect and study the potential energy distribution of a radiation source, it is necessary to know the spectral response of the detector used, so the spectral response is one of the important performance indicators of the detector. The measurement of the detector spectral response, generally more thermocouples as a non-selective detector for comparative measurement. However, the thermocouple spectral response is not constant for all wavelengths, the relative spectral response shown in Figure 1, so there are deficiencies in the comparison method. The measurement uses the standard radiation source method to directly measure and calculate the spectral response of TGS and LiTaO_3 detectors in the visible region and the near infrared region. The spectral responses of the photomultiplier tube and the silicon photovoltaic cell are also measured in order to compare with each other.