Patent ID: 8698945
Filing Date: 2014-04-15
Classification: G02B,G03B,H04N

Abstract:
1. A camera device comprising: at least one lens, a sensor operable to receive an image, a focusing device operable to adjust a focal length of the camera device, the focal length being a linear distance between the at least one lens and the sensor; a plane adjustment device operable to adjust an angle of a focus plane to define a tilted focus plane that is not orthogonal to a normal optical path with respect to said sensor; and an electronic controller operable to control said focusing device and plane adjustment device so as to focus on a subject in a field of view of the camera device by setting the focal length of the camera device with the tilted focus plane successively at one or more focal positions; said camera device further operable to take an image at each of said one or more focal positions at the tilted focus plane for generating focus statistics at the electronic controller performing a comparison of data obtained from the focus statistics so as to determine a correct focal distance for a best focus, said comparison including comparing of data from at least two different locations along the tilted focus plane for at least one image.