发明授权
US09030595B2 In-flight auto focus method and system for tunable liquid crystal optical element
有权
可调式液晶光学元件的飞行中自动对焦方法和系统
- 专利标题: In-flight auto focus method and system for tunable liquid crystal optical element
- 专利标题(中): 可调式液晶光学元件的飞行中自动对焦方法和系统
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申请号: US13822911申请日: 2011-10-14
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公开(公告)号: US09030595B2公开(公告)日: 2015-05-12
- 发明人: Tigran Galstian , Karen Asatryan , Vladimir Presniakov , Marco Thiboutot , Armen Zohrabyan , Aram Bagramyan , Amir Tork , Ted Cooper , Behzad Khodadad , Gongjian Hu , Chong I Cheang , Jeffrey James Parker
- 申请人: Tigran Galstian , Karen Asatryan , Vladimir Presniakov , Marco Thiboutot , Armen Zohrabyan , Aram Bagramyan , Amir Tork , Ted Cooper , Behzad Khodadad , Gongjian Hu , Chong I Cheang , Jeffrey James Parker
- 申请人地址: US CA Sunnyvale
- 专利权人: Lensvector Inc.
- 当前专利权人: Lensvector Inc.
- 当前专利权人地址: US CA Sunnyvale
- 代理机构: J-Tek Law PLLC
- 代理商 Jeffrey D. Tekanic; Scott T. Wakeman
- 国际申请: PCT/CA2011/050651 WO 20111014
- 国际公布: WO2012/048431 WO 20120419
- 主分类号: H04N5/232
- IPC分类号: H04N5/232 ; H04N5/225 ; G02F1/135 ; G02B7/38 ; G02F1/29 ; G03B3/10 ; G02B7/36 ; G02F1/1347
摘要:
An auto-focus system employing a tunable liquid crystal lens is provided that collects images at different optical power values as the liquid crystal molecules are excited between a ground state and a maximum optical power state tracking image focus scores. An image is acquired at a desired optical power value less than maximum optical power established with the liquid crystal molecules closer a fully excited state than the maximum optical power state having the same image focus score. This drive signal employed during image acquisition uses more power than was used to achieve the same optical power value during the auto-focus scan, while actively driving the liquid crystal molecules is fast. A pause due to image transfer/processing delays after acquisition is employed to allow slow relaxation of the liquid crystal molecules back to the ground state in preparation for a subsequent focus search.