System and method for stabilizing delivered laser energy

• US 8,187,259 B2
• Filed: 10/13/2010
• Issued: 05/29/2012
• Est. Priority Date: 03/15/2004
• Status: Expired due to Fees

• Current Assignee: Amo Manufacturing Usa, Llc (Johnson & Johnson)
• Original Assignee: Amo Manufacturing Usa, Llc (Johnson & Johnson)
• Inventors: Holliday, Keith
• Primary Examiner(s): FARAH, AHMED M
• Application Number:
  US12/903,507
• Publication Number:
  US 20110028956A1
• Time in Patent Office: 594 Days
• Field of Search: 606 4- 6, 606 10- 12, 607 88- 94, 128/898, 356213-236, 219/121.6, 219/121.61, 219/121.62
• US Class Current: 606/12
• CPC Class Codes: A61F 2009/00848 based on wavefront
• CPC Class Codes: A61F 2009/00855 Calibration of the laser system
• CPC Class Codes: A61F 2009/00872 Cornea
• CPC Class Codes: A61F 9/008 using laser
• CPC Class Codes: A61F 9/00804 Refractive treatments
• CPC Class Codes: A61F 9/00819 with photoablatable masks

Abstract

Systems and methods provide for stabilizing the amount of laser energy delivered to a target from a laser device. Generally, delivered laser energy is measured over multiple laser pulses or over time in the case of a constant wave laser. A decrease is then calculated in the delivered energy, the decrease being caused by accumulation of one or more substances, such as ozone, along the laser beam delivery path due to passage of the laser beam along the path. Using this calculated decrease, a laser device may be adjusted to compensate for the decrease in delivered energy due to the accumulated substance(s), thus stabilizing the amount of energy delivered to the target.

Claims

1. A system for performing a laser eye surgery procedure, the system comprising:

a laser energy generating device;

a laser energy measuring device disposed at or near a target for measuring delivered energy of the laser energy device; and

a processor coupled with the laser energy generating device and the laser energy measuring device for calculating an adjustment to the laser energy generating device to compensate for accumulation of one or more substances along a laser energy delivery path and for adjusting the laser energy generating device to stabilize an amount of delivered laser energy that arrives at a target of the laser eye surgery procedure.

2. A system as in claim 1, wherein the laser energy generating device provides pulsed laser energy.

3. A system as in claim 1, wherein the laser energy generating device provides constant wave laser energy.

4. A system as in claim 1, wherein the processor is calibrated before performing the laser eye surgery procedure.

5. A system as in claim 1, wherein the processor increases an amount of laser energy provided by the laser energy device to compensate for the accumulation of the substance(s) and decreases the provided laser energy to compensate for time between pulses of the laser energy, which time allows for dissipation of the substance(s).

6. A system as in claim 1, wherein the processor adjusts the laser energy generating device to compensate for accumulation of ozone along the delivery path.