Dual-wavelength laser scalpel background of the invention
Patent 4791927 Issued on December 20, 1988. Estimated Expiration Date: 
July 1, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 1, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesBroadly tunable chromium-doped beryllium aluminate lasers and operation thereof Efficient frequency converter utilizing higher order Stokes-Raman scattering Optical head of an installation for observation and treatment of the eye by laser radiation Patent #: 4499897 InventorApplicationNo. 07/068688 filed on 07/01/1987US Classes:606/3, With particular wavelength606/10SystemsExaminersPrimary: Hindenburg, MaxAttorney, Agent or FirmInternational ClassesA61B 18/20 (20060101)B23K 26/06 (20060101) AbstractA medical laser provides to a biological target both a laser wavelength in the deep red-near infrared region of the spectrum and a wavelength in the blue-near ultraviolet region. The short wavelength blue light cuts the target tissue, while the longer-wavelength red light cauterizes. The long-wavelength radiation may be provided by an alexandrite laser, with a harmonic generator providing half the fundamental wavelength. Alternatively, the short-wavelength radiation may be provided by an alexandrite laser, with a harmonic generator providing half the fundamental wavelength. Alternatively, the short-wavelength radiation may be provided by a xenon fluoride laser, with a Raman cell shifting the radiation from the ultraviolet into the visible. Generally, at least one of the wavelengths is visible on the target and both wavelengths may readily be transmitted by conventional optical fibers.Other References
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