This invention consists of a range of easily attachable, disposable and sterilizable caps which can be fitted onto the output end of laser therapy heads to prevent the spread of transmissible diseases during laser therapy treatments of humans and animals over a range of laser wavelengths at power levels across the electro-magnetic spectrum while maintaining laser beam intensities of less than one milliwatt per circular area of 7 mm diameter.
The invention comtemplates promotion or enhanced promotion of vascular or other growth in living body tissue through effectively concurrent in-vivo delivery of at least two beams of laser irradiation at an affected area of body tissue, wherein the irradiation (a) is of low intensity at tissue impingement and (b) is also of spectral wavelength that is preferably in the visible red or in the infrared. Perturbations result in affected cells either directly by reason of differences in the physical properties of the respective beams or indirectly by reason of interaction between the two beams at or near the situs of delivery to the affected body tissue.
A hand-held laser-welding wand includes a gas lens assembly that develops an inert gas atmosphere around a weld pool. The lens assembly additionally reflects laser light and thermal radiation that is reflected off a work piece surface away from the hand of a user of the hand-held laser welding wand.
