用于连续变焦成像的介电弹性体驱动长波红外阿尔瓦雷斯透镜

IF 3.1 3区 物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION Infrared Physics & Technology Pub Date : 2024-10-29 DOI:10.1016/j.infrared.2024.105614
Yang Cheng , Qi OuYang , Cancan Yao , Lin Liu , Zhaohui Li , Qun Hao
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引用次数: 0

摘要

根据 SWaP-C(尺寸、重量、功率和成本)的概念,人们追求一种轻、小、低成本和高性能的非制冷红外光学变焦成像系统。然而,传统的机械光学变焦方法很难满足这些要求。本文提出了一种紧凑型非制冷长波红外连续变焦成像系统,该系统采用由介电弹性体驱动的阿尔瓦雷斯透镜。该红外变焦成像系统主要由两对红外阿尔瓦雷斯透镜、可调光学挡板、聚焦透镜和红外探测器组成。第一对红外阿尔瓦雷斯透镜作为变焦组,第二对作为补偿组。红外阿尔瓦雷斯透镜采用五轴金刚石车铣技术制造。实验结果表明,当介质弹性体为第一对红外阿尔瓦雷斯透镜提供 1.44 毫米的横向位移时,为第二对红外阿尔瓦雷斯透镜提供 1.03 毫米的横向位移。红外连续变焦成像系统覆盖 8 ∼ 12 µm 的长波波段。变焦比可从 5 × 变为 15 ×,F 值为 2.0。拟议系统的总光长小于 80 毫米。红外探测器的分辨率为 640 × 512,像素间距为 17 µm。动态响应时间测试表明,上升和下降时间分别为 132 毫秒和 92 毫秒。拟议的长波红外连续变焦成像系统未来可用于无人机设备和热像仪等微型设备。
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Dielectric-elastomer-driven long-wave infrared Alvarez lenses for continuous zooming imaging
With the concept of SWaP-C (size, weight, power, and cost), a light, small, low-cost, and high-performance uncooled infrared optical zooming imaging system is pursued. However, the traditional mechanical optical zooming method makes it difficult to meet those requirements. In this paper, a compact uncooled long-wave infrared continuous zooming imaging system using the Alvarez lens actuated by dielectric elastomer is proposed. The infrared zoom imaging system mainly consists of two pairs of infrared Alvarez lenses, an adjustable optical stop, focusing lenses, and an infrared detector. The first pair of infrared Alvarez lenses serves as the zoom group and the second pair serves as the compensation group. The infrared Alvarez lenses are fabricated by five-axis diamond turning and milling technology. The experiment results show that when the dielectric elastomer can provide a lateral displacement of 1.44 mm to the first pair of infrared Alvarez lenses and a lateral displacement of 1.03 mm to the second pair of infrared Alvarez lenses. The infrared continuous zooming imaging system covers the long-wave band of 8 ∼ 12 µm. The zoom ratio can be changed from 5 × to 15 × and the F-number is 2.0. The total optical length of the proposed system is less than 80 mm. The resolution of the infrared detector is 640 × 512 with a pixel spacing of 17 µm. The dynamic response time testing revealed that the rise and fall times are 132 ms and 92 ms, respectively. The proposed long-wave infrared continuous zooming imaging system can be used in miniaturized devices such as UAV equipment and thermal imaging cameras in the future.
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来源期刊
CiteScore
5.70
自引率
12.10%
发文量
400
审稿时长
67 days
期刊介绍: The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.
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