典型光学观瞄窗口的“猫眼”效应特性评价与分析

各种光学观瞄窗口由于其自身结构和参数的不同,导致它们对入射光按原路返回的能力存在差异。为了客观评价此特性,提出了一种衡量光学观瞄窗口"猫眼"效应强弱的指标—RC,给出了数学模型并分析其主要影响因素。对几类典型光学观瞄窗口的"猫眼"效应指标RC进行了定量分析。结果表明:"猫眼"效应指标RC随光源波长的减小、镜头口径D的增大而增大,随反射元件反射系数ρS和光学系统穿越系数τS的增大而增大。

Evaluation and analysis to the"Cat's Eye"effect in typical optical observation window

As a result of different optical observation windows with different structure and parameters,the potency of incident light back along the original way is varied.In order to evaluate this characteristic objectively,the index to measure the "Cat's Eye" effect in typical optical observation window—RC is proposed with the mathematical model and the main influencing factors.Using a quantitative analysis method for valuing the RC indicators of the "Cat's Eye" effect in typical optical observation windows quantitatively.The results show that the increase of the diameter of the lens,the high reflectivity of reflection components and the transmissivity of the optical systems are in direct proportion to the RC index of the "Cat’s eye" effect while the wavelength of the light source in inverse proportion to it.