Examined body interior information observing apparatus by using

Details Examined body interior information observing apparatus by using Examined body interior information observing apparatus by using

1991-05-14

1994-04-26

Howell, Kyle L.

Surgery

Truss

Pad

128634, 128 6, 606 2, 607 89, 356318, A61B 100, A61B 600

Patent

active

053057597

ABSTRACT:
A photo-pulse from a photo-pulse generating apparatus is branched, where one branch is radiated to an examined body and the reflected light reflected within the examined body is delayed in time in proportion to the depth from the surface of the examined body and is led to a time-analyzing reflected light measuring apparatus. In this measuring apparatus, the other branched reference photo-pulse or reference signal pulse is input as delayed by the time for which the photo-pulse reflected within the examined body returns and only the reflected light component synchronized with the entering timing of this reference light pulse is analyzed in the time and is detected. By varying the detection sensitivity of this measuring apparatus in response to the depth from the surface of the examined body, the interior can be observed.

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"Femtosecond optical ranging in biological systems", J. G. Fujimoto et al, Optical Society of America, 1986.

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