Astigmatic laser ablation of surfaces

Details Astigmatic laser ablation of surfaces Astigmatic laser ablation of surfaces

1993-06-04

1995-10-24

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912173, 21912175, 21912185, 606 17, 606 5, B23K 2606, B23K 2602

Patent

active

054612128

ABSTRACT:
Laser surface ablation methods and apparatus are disclosed reprofiling surfaces astigmatically. An optical system includes cylindrically-powered elements to form an elliptical laser irradiation pattern on a target surface. By successively altering the area of the elliptical irradiation, an astigmatic, bi-powered ablation profile is achieved. Preferably, the invention is used with an excimer laser for excimer laser keratoplasty, keratomileusis or other ablative eye surgeries.

REFERENCES:
patent: 4387952 (1983-06-01), Slusher
patent: 4732148 (1988-03-01), Esperance, Jr.
patent: 4941093 (1990-07-01), Marshall et al.
patent: 4973330 (1990-11-01), Azema et al.
patent: 5109465 (1992-04-01), Klopotek
patent: 5147352 (1992-09-01), Azema et al.
patent: 5256853 (1993-10-01), McIntrey

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