Wide-field multi-axis aberrometer
AssigneeWaveFront Dynamics, Inc.
InventorsJames Copland, Daniel R. Neal, Lyle Kordonowy
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Abstract
This invention relates to optical methods and optical systems for making both on-axis and wide-field, peripheral off-axis wavefront measurements of an eye; and for designing and manufacturing wavefront-guided customized contact lens useful for myopia control. The wide-field optical instrument can comprise either (1) a multi-axis optical configuration using multiple off-axis beamlets, or (2) an instrument comprising a rotatable scanning mirror that generates off-axis probe beams.
Claims8
A wide-field multi-axis aberrometer for simultaneously measuring on-axis and off-axis refractive properties and aberrations of an eye of a patient when looking into the aberrometer, the aberrometer comprising:
- (a) a main on-axis optical path, having a horizontal central axis;
- (b) an on-axis beamlet having an on-axis centerline that is coincident with the horizontal central axis of the main on-axis optical path;
- wherein the on-axis beamlet comprises the following free-space optical components:
- an on-axis probe beam source;
- a first on-axis beamsplitter;
- an on-axis front lens;
- an on-axis rear lens;
- and
- an on-axis wavefront sensor configured to receive light and measure on-axis refractions and on-axis higher-order aberrations of the eye;
- wherein the on-axis centerline of the on-axis beamlet is configured to point towards the eye at an angle of incidence equal to zero degrees;
- (c) an off-axis beamlet having an off-axis centerline configured to point towards the eye at an off-axis angle of incidence;
- wherein the off-axis beamlet comprises the following free-space optical components:
- an off-axis probe beam source;
- an off-axis beamsplitter;
- an off-axis front lens;
- an off-axis rear lens;
- and
- an off-axis wavefront sensor configured to receive light and measure off-axis refractions and off-axis higher-order aberrations of the eye;
- wherein the off-axis beamsplitter is positioned to direct light travelling in the off-axis beamlet towards the eye at the off-axis angle of incidence;
- wherein the off-axis angle of incidence of the off-axis beamlet ranges from 5 to 30 degrees, as measured angularly relative to the horizontal central axis of the main on-axis optical path;
- wherein the on-axis beamlet further comprises a motorized Badal stage, comprising;
- (a) an on-axis video fixation target;
- (b) a second on-axis beamsplitter;
- (c) the on-axis rear lens;
- (d) the on-axis wavefront sensor;
- and
- (e) a motorized stage configured to move components (a) through (d) as a unitary group;
- and
- wherein the aberrometer further comprises:
- (1) a third on-axis beamsplitter located along the main on-axis optical path;
- (2) a first on-axis mirror coincident with the main on-axis optical path;
- (3) a third on-axis lens coincident with the main on-axis optical path;
- and
- (4) an on-axis alignment camera coincident with the main on-axis optical path;
- wherein the third on-axis beamsplitter is located between the on-axis front lens and the on-axis rear lens;
- wherein the first on-axis mirror is located between the third on-axis beamsplitter and the third on-axis lens;
- wherein the third on-axis lens is located between the first on-axis mirror and the on-axis alignment camera.
Dependencies are inferred from the claim text.