Surgery – Instruments – Light application
Patent
1995-03-28
1997-04-29
Shay, David M.
Surgery
Instruments
Light application
606 5, 606 10, 606 13, A61D 502
Patent
active
056244371
ABSTRACT:
A high speed, high resolution, programmable laser beam modulating apparatus includes a computer connected to a high resolution micromirror array having individually addressable and movable mirrors. The computer is also connected to a pulsed laser for controlling the emission thereof. A beam homogenizing optic changes an ablating input beam from the laser into a homogeneous beam having a uniform cross-sectional energy density. The mirrors are movable between an "on" position for reflecting a portion of the homogeneous beam onto a cornea, and an "off" position for reflecting the beam away from the cornea. The computer is programmed to move the mirrors to the "on" position in a series of predetermined patterns, and the remaining mirrors to the "off" position, and to fire the laser during the presence of each pattern, so that corresponding patterns of tissue on the cornea are successively ablated therefrom. The ablated patterns are overlaid on each other, so that they combine to produce a contour change in the cornea and correct a refractive error thereof.
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Texas Instruments brochure titled "DMD Projecting a Brighter Future." Oct. 1994. (2 pages).
Texas Instruments publication titled "DMD Display 1994." pp. 1-6.
Texas Instruments publication titled "Deformable-Mirror Spatial Light Modulators." Aug. 1989. pp. 1-17.
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Aura Systems, Inc. brochure for AuraScope Projection System.
Clayton William R.
Driggers Ronald G.
Freeman Jerre M.
Halford Carl E.
Williams Roy E.
Lo Jack
Shay David M.
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