摘要
通过动态链接库方式在Zemax中建立Q-type非球面接口,利用Q-type非球面设计了一款工作在可见光波段,垂直半视场为30°-110°,焦距为-1.25 mm,F数为5,系统总长为28.7 mm的全景环带光学系统（PAL）。该光学系统由7片透镜组成,包含6片球面镜和一片两面均为Q-type面型的非球面镜片。对设计结果进行了分析,全视场FTheta畸变小于1%,在奈奎斯特空间频率83 lp/mm处调制传递函数（MTF）高于0.5,成像效果接近衍射极限。为验证Q-type非球面在PAL设计中的优越性,实际设计了一个与Q-type面型PAL具有相同参数的偶次非球面PAL,对两者进行了分析比较。结果表明,在相同的计算平台下,Q-type非球面多项式系数的有效数字比对应的偶次非球面的多3-6位,有效减小了优化过程中计算机数字系统截断误差对优化过程的影响,有利于提高光学系统优化设计效率、提高非球面光学零件的加工精度和检测精度。
Implemented Q-type aspheres interface in Zemax by means of user defined surface dynamic link library （DLL）, and then design of a panoramic annular lens （PAL） with Q-type aspheres worked in the visible spectrum is presented. The designed PAL＇s half field of view （FOV） in vertical plane is 30 °- 110°, focal length is -1.25 ram, F Number is about 5 with a total length of 28.7 mm, which includes six spherical lenses and one lens with two Q- type aspheres. The performances of the designed optics are also analyzed. F-Theta distortions at the whole fields are less than 195, and modulation transfer function （MTF） values are greater than 0.5 at the Nyquist spatial frequency of 83 lp/mm that is approaching to the diffraction limit. For validating Q-type aspheres ＇ s superiority in PAL design, an even aspherical PAL with the same parameters has been designed to compare with the Q-type ones. The results show that, under the same computing platform, Q-type aspheric polynomial coefficients have 3-6 more significant digits than the corresponding even aspheric ones which can effectively reduce the computer truncated error in the optimization process. It＇ s help to speed up the design progress and enhance the precision of manufacturing and inspection of aspheric optical components.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2015年第7期291-297,共7页
Acta Optica Sinica
基金
国家自然科学基金(60877008)
