Homogenicity Of Beam Characterisitics
Date: January 26th, 2012
Details: It may be a surprise to non-physicists that diode laser beams are not inherently round, and even if circularizing lenses are used to correct this, then the beam intensity distribution is not homogeneous.
Laser beams are brighter (higher irradiance) in the middle and weaker towards the edge. Cells in the centre of the beam can be exposed to considerably higher irradiances than those on the periphery. Because the edge of a laser beam is hard to define and find this could mean that irradiance calculations are significantly different between different laser manufacturers.
YOLO Medical Inc. has gone to great lengths to ensure the laser diodes used in their equipment are providing consistent power delivery throughout the tissue to ensure optimal patient outcomes. This phenomenon known as laser speckle can be considered as one of the main differences between laser therapy devices and their clinical effectiveness. Less expensive laser devices may in fact be using cheaper laser diodes that although they purport to have the same output dynamics – they are in fact not providing uniform power to the tissue.
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