双波段共孔径相机可兼顾近红外和可见光两者优势, 即能保证丰富色彩信息的获取, 也可充分利用近红外探测较好的穿雾和高灵敏度弱光探测能力。设计了工作波段为450 nm～650 nm和750 nm～900 nm的双波段共孔径相机, 其视场角为35°×20°, F数为1.5, 采用全球面复杂化双高斯结构。设计结果表明: MTF>0.4(@50 lp /mm), 系统弥散斑<10 μm, 畸变<3％, 可满足指标要求。

Dual-band common aperture camera can take into account advantages of both near infrared and visible light. It not only ensures rich color information access, but also can take full advantage of better through fog and high sensitivity low light detection capability of near infrared detection. Dual-band common aperture camera with working band of 450 nm ~ 650 nm and 750 nm ~ 900 nm is designed, with field angle of 35°× 20°, F number 1.5, and globally complex double-Gaussian structure used. Results show that MTF is more than> 0.4 at 50 lp/mm, system diffuse spot is less than 10 μm, and distortion is less than 3%.