应用光学, 2018, 39 (3): 412, 网络出版: 2018-06-29   

大孔径大视场变焦投影镜头设计

Design of zoom projection lens with large aperture and wild view
作者单位
福建师范大学 光电与信息工程学院 医学光电科学与技术教育部重点实验室,福建 福州 350007
摘要
为了满足大孔径大视场变焦投影镜头的市场需求,基于Zemax光学软件设计一款连续变焦的投影镜头,变焦范围为16.27 mm ~22.77 mm,视场角为63.7°~47.8°,F数为1.75~1.95,配合1.55 cm(0.61英寸)LCOS投影显示芯片使用,在工作距离2 000 mm处可投射出190.5 cm(75英寸)画面,光学系统总长小于160 mm,由10片透镜组成,其中包括8片玻璃透镜和2片塑料透镜。设计结果表明:镜头在空间极限频率71 lp/mm 处,各个焦段的MTF值均大于0.5,场曲都在0.1 mm之内,畸变小于3%,成像质量良好。最后对光学系统进行了公差分析,得出一组较宽松的公差。
Abstract
To meet the market demand of large aperture and wide field zoom projection lens, we designed a zoom lens based on ZEMAX optical software.The zoom range is 16.27 mm ~22.77mm,its field of view (FOV) is 63.7°~47.8°,the F number is 1.75-1.95.Working with a 1.55 cm ( 0.61 inch) LCOS projection display chip ,a 190.5 cm( 75 inch) picture can be projected at a distance of 2000mm.The total length of optical system is less than 160mm,it is composed of 10 lenses,which include 8 glass lenses and 2 plastic lenses .Design results show that at the space frequency limit 71lp/mm, the full FOV MTF is greater than 0.5 and the field curvature of each zoom section is within 0.1mm, the distortion is within 3%, and the imaging quality is good.Finally, we conducted the tolerance analysis of the optical system , and obtained a set of loose machining tolerances.

黄耀林, 王敏, 林正. 大孔径大视场变焦投影镜头设计[J]. 应用光学, 2018, 39(3): 412. Huang Yaolin, Wang Min, Lin Zheng. Design of zoom projection lens with large aperture and wild view[J]. Journal of Applied Optics, 2018, 39(3): 412.

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