首页> 外文期刊>Control Systems Technology, IEEE Transactions on >Controlling a MEMS Deformable Mirror in a Miniature Auto-Focusing Imaging System
【24h】

Controlling a MEMS Deformable Mirror in a Miniature Auto-Focusing Imaging System

机译:在微型自动聚焦成像系统中控制MEMS变形镜

获取原文
获取原文并翻译 | 示例
           

摘要

Conventional auto-focusing camera modules adjust their optical focus by moving lenses. Although motors, such as stepping motors or voice coil motors, can change the lens position with great precision and thus vary the image sharpness, large volume and excess power consumption remain critical issues for mobile device applications. This paper discusses an auto-focusing camera module that adopts a microelectromechanical system (MEMS) deformable mirror (DM) with variable focusing capability to replace mechanical motors. The DM used in this paper can provide 20 diopters of focusing capability, which is one order of magnitude higher than silicon-based DMs, so the autofocus module can be compact enough for mobile devices. Because of the characteristics of MEMS DMs, we proposed a “percentage-drop” searching algorithm to find a sharp image based on a focus value calculation. The average auto-focusing time is 45% faster than the global searching method.
机译:常规的自动对焦相机模块通过移动镜头来调节其光学焦点。尽管诸如步进电动机或音圈电动机之类的电动机可以高精度地改变镜头位置,从而改变图像的清晰度,但是大体积和过多的功耗仍然是移动设备应用中的关键问题。本文讨论了一种自动对焦相机模块,该模块采用具有可变对焦功能的微机电系统(MEMS)变形镜(DM)来代替机械马达。本文中使用的DM可以提供20屈光度的聚焦能力,这比基于硅的DM高出一个数量级,因此自动聚焦模块可以足够紧凑以适合移动设备。由于MEMS DM的特性,我们提出了一种“百分比下降”搜索算法,以基于焦点值计算找到清晰的图像。平均自动对焦时间比全局搜索方法快45%。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号