Surgery – Instruments – Light application
Patent
1996-03-07
1998-07-21
Peffley, Michael
Surgery
Instruments
Light application
606 16, A61B 1739
Patent
active
057828253
ABSTRACT:
A microlens tip assembly for focusing output light from a light delivery catheter upon a target tissue. Due to the inherent divergence of output light from diode lasers, when such divergent light is conducted from the proximal end of a catheter to the distal end by means of a fiber optic, a portion is reflected at the fiber/air/lens interface to impinge upon the microlens housing area thereby heating the housing assembly resulting in overheating at high power levels and possible device failure and/or tissue damage. The present high-powered microlens includes a rear and front mount, both of which are fabricated from a non-light-absorbing material such as transparent or white plastic. The use of transparent or non-ligh-absorbing plastic components decreases the amount of heating of the tip assembly during light delivery, thereby solving the problem of therapeutic light delivery device failures and/or tissue damage due to overheating.
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Miravant Systems, Inc.
Peffley Michael
Petit Michael G.
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