On Tuesday, August 12th the UR SPIE student chapter will be continuing its Summer Colloquium series. Please bring your lunch and come listen to our next presentation! Snacks and beverages will be provided.
Who: Daniel Brooks
What: Precision Large Stroke Scanning System for Femtosecond Micromachining of Ophthalmic Materials
Date: 8/12/2014
Time: 11:30 am – 12:30 pm
Where: Sloan Auditorium (Goergen 101)
Abstract: Laser corrective surgery of the eye has become an increasingly common method for correcting vision in recent years. The problem with current technologies in this area is that they are based on changing the shape of the cornea through material removal. This is an inherently destructive process and either requires the removal of the epithelium (PRK) or cutting of a flap (LASIK). Recently the Knox group has shown that it may be possible to perform noninvasive vision correction using femtosecond micromachining to alter the local index of refraction in the cornea. This has been termed Intra-tissue Refractive Index Shaping (IRIS). The IRIS process is dependent on energy deposition rate which is dependent on the intensity of the laser beam and the speed at which the focal spot of the beam travels through the cornea. This leads to some interesting design problems because knowledge and control of the velocity of the focal spot of the beam becomes very important. In this talk I will discuss the challenges involved in designing a scanning system that meets the requirements of the IRIS process as well as show my work on a possible solution.
