发明名称 Method and apparatus for auto-focus using liquid crystal adaptive optics
摘要 An auto-focus camera (100) can include a lens (102), a sensor (108) for detecting an image from the lens, a first liquid crystal layer (104) between the lens and the sensor, and a second liquid crystal layer (106) between the lens and the sensor and further orthogonally aligned to the first liquid crystal layer. The auto-focus camera can further include an integrated circuit programmed to drive the first liquid crystal layer and the second liquid crystal layer. The auto-focus camera can include a controller (202) programmed to control two orthogonally aligned liquid crystal layers. The liquid crystal layers can serve as an optical anti-alias filter using birefringence properties of the liquid crystal layers. The first liquid crystal layer and the second liquid crystal layer can be orthogonally aligned to achieve polarization insensitive operation of the auto-focus camera.
申请公布号 US8786759(B2) 申请公布日期 2014.07.22
申请号 US200711846061 申请日期 2007.08.28
申请人 Motorola Mobility LLC 发明人 Wang Dongxue;Johnson Kevin W.;Zhuang Zhiming
分类号 H04N5/225;H04N5/232 主分类号 H04N5/225
代理机构 代理人 Meles Pablo;Chen Sylvia
主权项 1. An auto-focus camera, comprising: a lens; a sensor for detecting an image from the lens; a first liquid crystal layer between the lens and the sensor for passing waves in two orthogonal polarizations and for adjusting a refractive index for extraordinary (p) waves; and a second liquid crystal layer between the lens and the sensor where an optical axis of the second liquid crystal layer is orthogonally aligned to an optical axis of the first liquid crystal layer for passing waves in two orthogonal polarizations, wherein the first liquid crystal layer and the second liquid crystal layer are flat surface liquid crystal elements.
地址 Chicago IL US