Patent ID: 8591027
Filing Date: 2013-11-26
Classification: A61B,G01J

Abstract:
1. An apparatus comprising: a sub-wavefront focusing lens configured to focus a returned sub-wavefront to an image spot on a focal plane, with the returned sub-wavefront being a portion of a wavefront returned from the patient's eye, where the wavefront is generated by a light source; a sequential wavefront scanning device configured to sequentially shift the returned wavefront by a first displacement in a first dimension and a second displacement in a second dimension so that different portions of the wavefront are sequentially projected onto the sub-wavefront focusing lens; a variable aperture configured to control the size of the sub-wavefront to be focused by the sub-wavefront focusing lens ; a position sensing device, located substantially at the focal plane of the sub-wavefront focusing lens, configured to indicate the two-dimensional displacement from a reference point of the image spot on the focal plane; and a controller, coupled to the-variable aperture and sequential wavefront scanning device, configured to coordinate the operation of the variable aperture and the sequential wavefront scanning device to control the wavefront sampling speed, the spatial resolution, and the sampling pattern.