Abstract: An apparatus for measuring optical aberrations of the human eye wherein the person positions his or her eye on an optical axis of the apparatus and looks at an illuminated target on the optical axis that is visible to the eye for allowing the eye to focus on the target and establish a position of the eye. A collimating lens on the optical axis is movable along the optical axis for adjusting the apparent optical distance between the eye and the target. A light source directs a predetermined light beam along the optical axis into the eye and onto the retina of the eye as a spot of light. A lens reimages the light scattered from the light spot on the eye retina into a wavefront curvature sensor that forms two oppositely defocused images on an image detector, and a computer processes and analyzes the two defocused images for measuring the optical aberrations of the eye.

Abstract: A mounting apparatus for a deformable mirror that has a peripheral mounting portion with oppositely-facing and parallel mounting surfaces. A base member and a mounting ring have juxtaposed peripheral flange portions with rubber o-rings for engaging the parallel mounting surfaces of the mirror. A plurality of set screws are provided in the base member and the mounting ring in the peripheral flange portions and engage the o-rings for applying and adjusting a mounting force to the mounting surfaces of the mirror. The base member is also provided with set screws in the perimeter for engaging and centering the mirror.

Abstract: An apparatus for measuring optical aberrations of the human eye wherein the person positions his or her eye on an optical axis of the apparatus and looks at an illuminated target on the optical axis that is visible to the eye for allowing the eye to focus on the target and establish a position of the eye. A collimating lens on the optical axis is movable along the optical axis for adjusting the apparent optical distance between the eye and the target. A light source directs a predetermined light beam along the optical axis into the eye and onto the retina of the eye as a spot of light. A lens reimages the light scattered from the light spot on the eye retina into a wavefront curvature sensor that forms two oppositely defocused images on an image detector, and a computer processes and analyzes the two defocused images for measuring the optical aberrations of the eye.

Abstract: A deformable curvature mirror capable of controlled deformation by applying electrical voltages to electrode segments on the back of the mirror. Two plates of an electro-restrictive material, such as PZT or PMN, are jointed together with at least one conductive layer sandwiched therebetween. One plate has an outer conductive layer and a mirrored surface on the outer conductive layer. The conductive layers are electrically grounded. The other plate has a pattern of a plurality of electrode segments on the outer surface with each electrode segment having a separate electrical terminal for applying a variable electrical voltage thereto for separately transmitting a variable current through each said electrode segment and through at least the other plate for causing variable expansion of the plate and thereby selectively deforming that plate and, in turn, the deformable curvature mirror.