Mechanism Design of Continuous Infrared Zoom Lens
LI Yonggang,ZHANG Bao,DING Jinwei (Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences Changchun 130033)
In recent years, the demand for infrared zoom systems is increasing in proportion with the development of infrared technology and its applications. In order to testify the varifocusing performance and image quality of one novel continuous in- frared zoom lens, two kinds of cam mechanism were described according to the optic design of the infrared zoom lens, cam mechanism, guide mechanism and focusing mechanism was discussed in detail, and suppression methods on the stray radi- ation of the system were introduced. The tests show that cam mechanism and guide mechanism can achieve varifocusing of the continuous infrared zoom lens, and the suppression methods can improve the image quality of the infrared lens.