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Abstracts |

Microsurgery and Spectroscopy with the Maser.

Ronald A. Malt, M.D.
Ann Intern Med. 1964;60(4):726-727. doi:10.7326/0003-4819-60-4-726_2
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This excerpt has been provided in the absence of an abstract.

Coherent visible light from an optical maser (laser) can be focused through a conventional optical system to a spot approaching ⅓ µ in diameter. This enormous concentration produces a power density greater than that of radiant energy at the surface of the sun; yet, minute targets subjected to the flux can be heated with no effect on thermal equilibrium in surrounding tissue.

Actual effects on a biological object depend on the absorbent properties at a given wavelength as well as the intensity of incident radiation. Since pigmented areas are affected far more than reflective or transparent ones, focal lesions can


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