摘要
红外连续变焦光学系统是红外热像仪的重要组成部分。介绍了一个变倍比为5×的长波连续变焦光学系统,该系统采用光学补偿的变焦方式,光学系统的F数为2、冷屏效率100%。对5个视场严格校正了像差,各个视场的MTF曲线均接近衍射极限。采用二次成像方式,使光学系统的通光孔径被约束在φ128mm以内。该光学系统在整个变焦过程中具有较好的成像质量。
Infrared continuous zoom optical system is one of the important part of the infrared thermal imager. A long wavelength zoom optical system with magnification of 5 × is designed. The system adopts optically compensated zoom mode, and the F number is 2, the cold stop efficiency is equal to 100%. The aberrations of five FOVs are well corrected, and the MTF curves of each FOV are closed to the diffraction limited. By re-imaging, the diameter of the apertures is constrained within 128mm. This system has good imaging quality during the whole zoom.
出处
《光学仪器》
2011年第3期53-56,共4页
Optical Instruments
