Extended depth of field optics for human vision
First Claim
1. A system for extending depth of field of an eye, comprising an optical mask positioned between retina of the eye and an object, the optical mask configured for altering an optical transfer function of the eye wherein the optical transfer function is substantially insensitive to distance between the eye and the object.
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Abstract
The present invention provides extended depth of field to human eyes by modifying contact lenses, intraocular implants, and/or the surface of the eye itself. This may be accomplished by applying selected phase variations to these optical elements (e.g., by varying surface thickness of the cornea of the eye). The phase variations EDF-code the wavefront and cause the optical transfer function to remain essentially constant within a range of distances from the in-focus position. This provides a coded image on the retina. The human brain decodes this coded image, resulting in an in-focus image over an increased depth of field.
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Citations
10 Claims
- 1. A system for extending depth of field of an eye, comprising an optical mask positioned between retina of the eye and an object, the optical mask configured for altering an optical transfer function of the eye wherein the optical transfer function is substantially insensitive to distance between the eye and the object.
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5. A method for extending depth of field of an eye, comprising steps of:
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altering an optical transfer function of the eye thereby providing an altered optical transfer function such that the altered optical transfer function is substantially insensitive to distance between an object and the eye; and
encoding phase of light from the object with the altered optical transfer function. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification