公开(公告)号：WO2012048431A9

公开(公告)日：2012-06-07

申请号：PCT/CA2011050651

申请日：2011-10-14

Applicant: LENSVECTOR INC ,  ZOHRABYAN ARMEN ,  GALSTIAN TIGRAN ,  ASATRYAN KAREN ,  PRESNIAKOV VLADIMIR ,  THIBOUTOT MARCO ,  BAGRAMYAN ARAM ,  TORK AMIR ,  PARKER JEFFREY JAMES ,  COOPER TED ,  KHODADAD BEHZAD ,  HU GONGJIAN ,  CHEANG CHON I

Inventor： ZOHRABYAN ARMEN ,  GALSTIAN TIGRAN ,  ASATRYAN KAREN ,  PRESNIAKOV VLADIMIR ,  THIBOUTOT MARCO ,  BAGRAMYAN ARAM ,  TORK AMIR ,  PARKER JEFFREY JAMES ,  COOPER TED ,  KHODADAD BEHZAD ,  HU GONGJIAN ,  CHEANG CHON I

IPC: G02F1/137 ,  G02F1/133

CPC classification number: G02B7/36 ,  G02B7/38 ,  G02F1/133784 ,  G02F1/13439 ,  G02F1/1347 ,  G02F1/29 ,  G02F2001/294 ,  G03B3/10 ,  H04N5/23212

Abstract: 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.

Abstract translation: 提供了一种采用可调谐液晶透镜的自动对焦系统，其在液晶分子在基态和最大光焦度状态追踪图像聚焦分数之间被激励时收集具有不同光焦度值的图像。 以比具有相同图像聚焦分数的最大光焦度状态更接近完全激发状态的液晶分子建立的最大光学功率，以期望的光学功率值获取图像。 在图像获取期间使用的该驱动信号使用比在自动对焦扫描期间用于获得相同的光功率值更多的功率，同时主动驱动液晶分子的速度很快。 采集之后由于图像转移/处理延迟而暂停，以允许液晶分子缓慢放松回到基态以准备随后的聚焦搜索。

公开(公告)号：EP3224673A4

公开(公告)日：2018-07-11

申请号：EP15863807

申请日：2015-11-24

Applicant: LENSVECTOR INC

Inventor： GALSTIAN TIGRAN ,  ASATRYAN KAREN ,  ZOHRABYAN ARMEN ,  THIBOUTOT MARCO ,  PRESNIAKOV VLADIMIR

IPC: G02F1/31 ,  G02B3/08

CPC classification number: G02F1/292 ,  G02B3/08 ,  G02F1/1337 ,  G02F1/29 ,  G02F2001/134381 ,  G02F2001/294

Abstract: A liquid crystal optical device is described configured to provide variable beam steering or refractive Fresnel lens control over light passing through an aperture of the device. The device includes at least one layer of liquid crystal material contained by substrates having alignment layers. An arrangement of electrodes is configured to provide a spatially varying electric field distribution within a number of zones within the liquid crystal layer. The liquid crystal optical device is structured to provide a spatial variation in optical phase delay with a transition at a boundary between zones which is an approximation of a sawtooth waveform across the boundaries of multiple zones. The arrangement of electrodes, device layered geometry and methods of driving the electrodes increase the effective aperture of the overall optical device.