Examined body interior information observing apparatus by using photo-pulses controlling gains for depths
First Claim
1. An examined body interior information observing apparatus comprising:
- a photo-pulse generating means for generating light energy in the form of photo-pulses for observing the interior of an examined body;
a time-analytical reflected light detecting means for time-analytically measuring in response to a depth from a surface of the examined body light energy emitted from said photo-pulse generating means and reflected within said examined body to produce an output signal; and
a detection sensitivity varying means for varying detection sensitivity so that a level of at least the output signal of said time-analytical reflected light detecting means may vary in response to said light energy reflected from different depths within said examined body.
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Accused Products
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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Citations
50 Claims
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1. An examined body interior information observing apparatus comprising:
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a photo-pulse generating means for generating light energy in the form of photo-pulses for observing the interior of an examined body; a time-analytical reflected light detecting means for time-analytically measuring in response to a depth from a surface of the examined body light energy emitted from said photo-pulse generating means and reflected within said examined body to produce an output signal; and a detection sensitivity varying means for varying detection sensitivity so that a level of at least the output signal of said time-analytical reflected light detecting means may vary in response to said light energy reflected from different depths within said examined body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. An examined body interior information observing apparatus comprising:
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a photo-pulse generating means for generating light energy in the form of photo-pulses for observing the interior of an examined body; a detecting timing setting means for delaying said photo-pulses generated by said photo-pulse generating means and producing a reference signal; a time-analytical reflected light energy detecting means for time-analytically detecting the light energy reflected within said examined body; and a detection sensitivity/detecting level varying means for varying a detection sensitivity/detecting level so that a level of at least an output signal of said time-analytical reflected light energy detecting means may vary. - View Dependent Claims (49, 50)
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Specification