摘要
根据航空摄影侦察高机动性的特点和调焦精度要求,提出了数据采集与计算的自动调焦方法。分析了航空摄影时大气压力、温度和摄影斜距的变化对航空相机离焦的影响,给出了计算相机离焦量的简易数学方程,介绍了新型航空相机自动调焦系统的设计原理和基本组成,完成了系统的硬件电路和软件流程设计。光学测试和实际应用证明:这种控制技术不仅实用可靠,而且调焦速度快、精度高,满足了航空摄影侦察的要求。
Considering the high-maneuvering feature of aerial photograph/reconnaissance and the requirement to its focusing accuracy,a new auto-focusing method based on data acquisition and calculation was proposed.The effect of the changing of atmospheric pressure,temperature and oblique photographing distance on focusing of aerial camera in photographing was analyzed.A simple mathematic equation was presented to calculate defocusing amount.The basic configuration and principle of auto-focusing system for a new type aerial camera were introduced.The design of hardware circuit and the software flowchart was given.Optical measurement and practical application indicated that the method is practicable and reliable with high focusing speed and high accuracy,which can meet the requirements to aerial photograph/reconnaissance.
出处
《电光与控制》
北大核心
2011年第4期77-80,共4页
Electronics Optics & Control
关键词
航空相机
自动调焦
调焦精度
离焦
光学测试
aerial camera
auto-focus
focusing accuracy
out of focus
optical measurement
