摘要
与传统的通过电机调节透镜相对位置达到变焦目的设计完全不同,提出了一种设计无机械运动变焦光学系统的新方法。利用亥姆霍兹自由能最小化方法推导出适合双液体变焦透镜的杨氏方程,将以气液固三相系统为基础的传统杨式方程扩展到了液液固三相系统。以圆柱结构的双液体变焦透镜为组分设计了一种新型的变焦光学系统,分析了系统在外加电压作用下使焦距变化的同时又能保持像面不变时必须满足的条件。模拟结果表明该系统的变倍比大约可达到1∶1.5。
A new design method for a variable-focus optical system without mechanical movements is proposed.It is quite different from that for traditional variable-focus optical systems,and changes the focal length of the system by regulating the relative position of the lenses with a motor.An extended Young＇s equation suited for double-liquid variable-focus lenses is derived by means of Helmholtz free energy minimization method.The traditional Young＇s equation based on vapor-liquid-solid tri-phase systems is extended to liquid-liquid-solid systems.Based on the cylindrical double-liquid variable-focus lenses,a new-type variable-focus optical system is presented.The conditions under which the optical system with appropriate applied voltages cannot only change the focal length but also keep the image plane stable simultaneously are researched.The corresponding simulation results show that the zoom ratio of the system can reach about 1∶1.5.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2008年第6期1141-1146,共6页
Acta Optica Sinica
基金
国家973计划(2005CB724304
2007CB935303)
国家自然科学基金(60778031)
高等学校博士学科点专项科研基金(20050252004)
上海市重点学科建设项目(T0501)资助课题
关键词
光学设计
变焦系统
自由能最小化方法
液体透镜
optical design
variable-focus system
free energy minimization method
liquid lens
