| Cs量与Cs2Te光阴极紫外-可见光抑制比关系研究 |
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| 引用本文： | 刘晖,张连东,冯刘,程宏昌,高翔,苗壮. Cs量与Cs2Te光阴极紫外-可见光抑制比关系研究[J]. 红外与激光工程, 2014, 43(3): 940-943 |
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| 作者姓名： | 刘晖 张连东 冯刘 程宏昌 高翔 苗壮 |
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| 作者单位： | 1.微光夜视技术重点实验室,陕西西安710065; |
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| 基金项目： | 微光夜视技术重点实验室基金(J20110102) |
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| 摘 要： | 紫外-可见光抑制比是决定全天时紫外探测成像系统信噪比的一个重要参数。为了研究激活时Cs 量对Cs2Te 紫外光阴极紫外-可见光抑制比（S280 nm/S320 nm）的影响，利用三组不同Cs 量的多次激活实验，通过分别对比紫外-可见光抑制比结果和200~400 nm 的光谱响应曲线，得到不同Cs 量激活的Cs2Te 光阴极其紫外-可见光抑制比在4.0~7.6 之间变化。随着Cs 量的增大，紫外光阴极的积分灵敏度相应增长，主要体现在260~320 nm，但峰值256 nm 处的辐射灵敏度增长不明显。重点分析了激活时Cs 量对大于320 nm 波长范围光谱响应的影响。
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| 关 键 词： | 紫外-可见光抑制比 Cs2Te 紫外光阴极 日盲 |
| 收稿时间： | 2013-07-05 |
Study of Cs content on UV-visible rejection ratio of Cs2Te photocathode |
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| Affiliation: | 1.Science and Technology on Low-Light-Level Night Vision Laboratory,Xi'an 710065,China;2.North Night Vision Technology Group Co.,Ltd,Kunming 650223,China |
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| Abstract: | UV-visible rejection ratio is an important parameter for determining SNR of all-day ultraviolet detector system. In order to study the effect of Cs sensitization on UV-visible rejection ratio S280 nm/S320 nm of Cs2Te ultraviolet photocathode during the activation, many activation experiments by using three different groups of Cs content were carried out. Respective comparing the results of UV-visible rejection ratio and the spectral response curves of 200-400 nm, the rejection ratio values of Cs2Te photocathodes activated with different Cs content varied from 4.0 to 7.6. As Cs content grew, the integral sensitivity of photocathodes increased correspondingly between 260 nm and 320 nm, while the growth of the radiation sensitivity at the peak of 256 nm was not remarkable. So this paper focused on the influence of Cs content on the spectral response whose wavelength was more than 320 nm. |
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