摘要
由于光电仪器日益小型化和轻量化,从而在系统中越来越多地采用了一些像非球面和自由曲面光学零件、折射—衍射混合光学零件等新型的光学零件。但是,随着镜头的变小,在很小的空间内已无法使用原有的机械方法实现对焦和变焦的功能。这就是研发小尺寸、可变焦距的液体透镜的目的。文中系统地介绍了通过调整电压或其他物理量的方法,改变介质的折射率(液晶透镜)或面型(液体透镜),从而可以改变其焦距的透镜。目前基于电湿润法原理的液体透镜已经商品化,并已经开始大量的用于手机的照相光学模组中,实现了对不同距离的物体进行对焦。但由于液体透镜的研发仅仅是开始,还有很多的性能要改善、还有很多的关键课题等待去解决。
More and more new optical elements, such as aspherical and freeform optical elements, refractive-diffractive hybrid elements, were used in optical systems, because the opto-electronic devices got smaller and lighter increasingly. With a lens getting smaller, the original mechanical method already couldn＇t be used in very small space to realize the function of focusing and zooming. That was the purpose of developing a small-size focus-variable liquid lens. The article systematically explained some new lenses of which focus length can be varied by changing the refractive index of media（ liquid crystal lens）or surface figure（ liquid lens）via the adjustment of voltage or other physical measurements. The liquid lenses based on electrowetting have been commodity at present, used enormously in the optical modules of mobile phone cameras to bring the objects at difference distances into focus. Anyway the development of liquid lens and liquid crystal lens is only beginning, a lot of performances should be improved and many key problems are waiting for solutions.
出处
《光学仪器》
2010年第6期70-78,共9页
Optical Instruments
