Aiming at the needs of high resolution,batch production and low cost for uncooled infrared lens,taking chalcogenide glass and Ge crystal as the materials,a passive optical compensation athermal lens for gun sight,automotive night vision and security monitoring was designed based on refractive-diffractive mixing design method.According to optical athermalization theory,optical path of the system was designed,and chalcogenide glass was manufactured by fine molding technology.The experimental results show that the imaging of the system with this lens is clear within the range of -40~ 55 ℃,and it can meet design requirements.It has an advantage of low cost in practical engineering application.