变F数红外光学系统的进展和关键技术

Progress and Key Technologies of Infrared Optical System with Variable F-number

根据现代战争对夜间进行目标跟踪、侦察及监视的迫切需求,红外光学系统在国防领域获得了广泛的应用。与变焦红外光学系统相比,基于可变冷光阑的变F数红外光学系统可以进行大视场搜索与极小视场监视的转换,提高通光孔径利用率,提高成像质量。随着对视场范围、图像质量、系统小型化等需求的不断提高,变F数红外光学系统逐渐凸显其优势。对变F数光学系统的原理进行了研究,概述了国内外在变F数红外光学系统领域的研究进展。通过分析,提出了系统关键结构可变冷光阑实现的技术路线。最后简要分析了可变冷光阑设计的关键技术。

According to the modem warfare urgent needs on target tracking, reconnaissance and surveillance at night, infrared optical system has been widely used in the national defense field. Compared with zoom infrared optical system, variable F-number infrared optical system which is based on variable cold aperture could achieve the switch of large-scale search and minimum-scale surveillance, the increase of aperture efficiency and the improvement of the image quality. With the increasing demand on the field of view, image quality and system miniaturization, the infrared optical system with variable F-number gradually highlights its advantages. The principle of infrared optical system with variable F-number is studied and the research progress in the field of which is summarized. Via analysis, the technical routes to achieve the key structure variable cold aperture are proposed. In the end, a brief analysis on the key technologies of the available cold aperture is given. It is useful for the development of infrared optical system.