초록 ▼

An optical system for partitioning and focusing a laser beam into a plurality of focal points to simultaneously photoalter corneal tissue at a plurality of locations includes a laser source. In one embodiment, an active mirror is used to partition the master beam into diverging beams. In another emb

An optical system for partitioning and focusing a laser beam into a plurality of focal points to simultaneously photoalter corneal tissue at a plurality of locations includes a laser source. In one embodiment, an active mirror is used to partition the master beam into diverging beams. In another embodiment, a lenslet array in combination with a field lens is used to partition the master beam into seven diverging beams. The resultant diverging beams are then collimated, magnified and focused into a plurality of focal points using a set of optical lenses. Each focal point has an average pulse energy of approximately 5 μJ rendering it suitable for subsurface photoalteration of corneal tissue. A scanning mechanism is provided to move the plurality of focal points, as a group, along a predetermined path through the cornea to quickly and safely photoalter a predetermined volume of subsurface corneal tissue.

대표청구항 ▼

An optical system for partitioning and focusing a laser beam into a plurality of focal points to simultaneously photoalter corneal tissue at a plurality of locations includes a laser source. In one embodiment, an active mirror is used to partition the master beam into diverging beams. In another emb

An optical system for partitioning and focusing a laser beam into a plurality of focal points to simultaneously photoalter corneal tissue at a plurality of locations includes a laser source. In one embodiment, an active mirror is used to partition the master beam into diverging beams. In another embodiment, a lenslet array in combination with a field lens is used to partition the master beam into seven diverging beams. The resultant diverging beams are then collimated, magnified and focused into a plurality of focal points using a set of optical lenses. Each focal point has an average pulse energy of approximately 5 μJ rendering it suitable for subsurface photoalteration of corneal tissue. A scanning mechanism is provided to move the plurality of focal points, as a group, along a predetermined path through the cornea to quickly and safely photoalter a predetermined volume of subsurface corneal tissue. nn; US-5520642, 19960500, Bigagli et al.; US-5520665, 19960500, Fleetwood; US-5520666, 19960500, Choudhury et al.; US-5573516, 19961100, Tyner; US-5573520, 19961100, Schwartz et al.; US-5573525, 19961100, Watson et al.; US-5573526, 19961100, Hess; US-5616129, 19970400, Mayer; US-5616130, 19970400, Mayer; US-5620434, 19970400, Brony; US-5623969, 19970400, Raines, 604/854; US-5776125, 19980700, Dudar et al., 604/411; US-5891129, 19990400, Daubert et al., 604/411; US-5925029, 19990700, Jansen et al., 604/411; US-6325782, 20011200, Lopez, 604/249