05305759 is referenced by 181 patents and cites 11 patents.

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.

Title
Examined body interior information observing apparatus by using photo-pulses controlling gains for depths
Application Number
7/700225
Publication Number
5305759
Application Date
May 14, 1991
Publication Date
April 26, 1994
Inventor
Hiromasa Suzuki
Akishima
JP
Yoshihiro Kosaka
Hachioji
JP
Susumu Takahashi
Kunitachi
JP
Eiichi Fuse
Hachioji
JP
Kazunari Nakamura
Hachioji
JP
Ichiro Nakamura
Kokubunji
JP
Shuichi Takayam
Hachioji
JP
Masakazu Gotanda
Kanagawa
JP
Kuniaki Kami
Hachioji
JP
Mamoru Kaneko
Hachioji
JP
Agent
Armstrong Westerman Hattori McLeland & Naughton
Assignee
Olympus Optical
JP
IPC
A61B 6/00
A61B 1/00
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