| 用于真空紫外探测器标定的光学斩波器研究北大核心CSCD |
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| 引用本文： | 卢飞,张博妮,秦艳,胡铁力,俞兵,孙宇楠,曹锋. 用于真空紫外探测器标定的光学斩波器研究北大核心CSCD[J]. 应用光学, 2022, 43(2): 325-330. DOI: 10.5768/JAO202243.0204003 |
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| 作者姓名： | 卢飞 张博妮 秦艳 胡铁力 俞兵 孙宇楠 曹锋 |
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| 作者单位： | 西安应用光学研究所，陕西 西安 710065 |
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| 基金项目： | 国防科工局技术基础项目 |
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| 摘 要： | 为了满足基于低温辐射计的115 nm~400 nm波段探测器绝对光谱响应度高精度标定的需求,研制了一种由斩波片、转轴、伺服电机、U型光电开关、降温组件、支架和控制电路等组成的适用于真空环境的光学斩波器,使其在真空低温环境下将微弱的真空紫外-紫外辐射信号调制为频率已知的交变辐射信号,并由锁相放大器进行测量。实验结果表明,该光学斩波器的频率在80 Hz时的稳定性为±0.05 Hz,满足115 nm~400 nm波段探测器绝对光谱响应度标定对斩波器在10^(-4) Pa的真空环境下的使用要求。
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| 关 键 词： | 真空环境 光学斩波器 调制 低温辐射计 光谱响应度 |
| 收稿时间： | 2021-10-27 |
Optical chopper applied for calibration of vacuum ultraviolet detector |
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| Affiliation: | Xi'an Institute of Applied Optics, Xi'an 710065, China |
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| Abstract: | In order to precisely calibrate the absolute spectral responsivity of detector from 115 nm~400 nm based on cryogenic radiometer, an optical chopper used in vacuum was developed. The optical chopper consisted of blade, rotation axis, servo motor, U-shaped photoelectric switch, cooling module, bracket and controlling circuit could be used to modulate the weak vacuum ultraviolet-ultraviolet (VUV-UV) radiation signal to the alternating radiation signal which the frequency was known in vacuum cryogenic environment, and measured by lock-in amplifier. The experimental results show that the stability of the optical chopper is ±0.05 Hz at the frequency of 80 Hz, which meets the requirements of absolute spectral responsivity calibration of detector at 115 nm~400 nm in the vacuum environment of 10?4 Pa. |
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