| 红外成像系统异形非球面优化及冷反射分析 |
| 投稿时间：2024-07-03 修订日期：2024-07-12 点此下载全文 |
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| 基金项目:基于Zernike矢量多项式的离轴反射系统失调像差特性和失调量求解方法研究 |
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| 中文摘要:在设计红外系统的过程中，常使用偶次非球面来提高系统性能。使用设计软件的优化功能可以快速找出最佳的非球面，但是这些非球面很可能出现震荡面型。为了消除红外成像镜头中的异形非球面及降低系统的冷反射现象，先从定义角度解析了冷反射现象的评价参数。结合冷反射光迹图确定了冷反射评价参数依然适用于非球面的冷反射控制。又从矢高角度，控制从非球面透镜中心至边缘矢高值的单调性及符号的一致性来消除异形非球面。设计了一款中波红外成像镜头，初始设计结构中出现了异形非球面。根据控制矢高值的方法和冷反射的抑制方案对异形非球面进行控制。优化后的红外成像系统没有异形非球面，经透镜各表面反射后返回探测器的冷反射能量覆盖整个探测器像面。说明此优化方案适用于含有异形非球面的红外系统，且更加直观。 |
| 中文关键词:非球面 冷反射 异形非球面 矢高 |
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| Optimiaztion and Narcissus Analysis of Irregular Aspheric Surfaces in infrared imaging system |
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| Abstract:In the design of infrared system. even aspheric surfaces are often used to improve system performance. The optimization capabilities of the design software can be used to quickly find the best aspheric surfaces, but these aspheric surfaces are likely to have oscillation surface patterns. In order to eliminate irregular aspheric surfaces in infrared imaging system and reduce Narcissus of the system, The evaluation parameters of the Narcissus are analyzed from a definition perspective. Combined with the Narcissus trace, it is determined that the Narcissus evaluation parameters are still suitable for the Narcissus control of aspheric surfaces. From the perspective of the sagittal height, the monotonicity of the sagittal height value from the center of the aspheric lens to the edge of the sagittal height and the consistency of the sign are controlled to eliminate the irregular aspheric surface. A medium wave infrared imaging system is designed. and irregular aspheric surfaces appeared in the initial design structure. According to the method of controlling the sagittal height value and the suppression scheme of Narcissus, the irregular aspheric surface is controlled The optimized infrared imaging system does not have any irregular aspheric surfaces and the Narcissus energy returned to the detector after being reflected by each surface of the system covers the entire detector image surface. It shows that this optimization scheme is suitable for infrared systems with irregular aspheric surfaces, and is more intuitive. |
| keywords:aspheric surfaces Narcissus irregular aspheric surfaces sagittal height |
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