Device and method for non-invasive optical measurements
First Claim
1. An optical measurement device for use in non-invasive measurements on a patient'"'"'s body, the device comprising:
- an illumination assembly configured and operable to generate illuminating light of a predetermined wavelength range;
a detection assembly configured and operable to concurrently provide transmission-mode and reflection-mode of light detection, the detection assembly comprising a first transmission-mode detector unit configured for detecting a first light signal indicative of the transmission of the illuminating light in the predetermined wavelength range through an illuminated body portion and generating first measured data indicative of the detected transmitted light, and a second reflection-mode detector unit operating simultaneously with said first detector and configured for detecting a second light signal indicative of the reflection of the illuminating light in the predetermined wavelength range from the illuminated body portion and generating second measured data indicative of the detected reflected light; and
a light directing assembly comprising a light diffuser for scattering back light incident thereto, the light diffuser being oriented to redirect at least one of the illuminating, transmitted and reflected light components back towards the illuminated body portion to thereby cause further interaction of the redirected light with the body portion, and allow detection of the transmitted and reflected light components by said first and second detection units, thereby increasing amount of light reaching a region of interest inside the body portion and thus maximizing homogeneity of the first and second detected light signals.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical measurement device and method are presented for use in non-invasive measurements on a patient'"'"'s body. The device comprises an illumination assembly configured and operable to generate illuminating light of a predetermined wavelength range; a detection assembly; and a light directing assembly. The detection assembly comprises a first detector unit for detecting a first light signal transmitted through an illuminated body portion and generating first measured data indicative of the detected transmitted light, and a second detector unit for detecting a second light signal reflected from the illuminated body portion and generating second measured data indicative of the detected reflected light. The light directing assembly comprises a light diffuser for scattering back light incident thereto, to thereby direct the illuminating light or the light coming from the body portion back towards the body portion. This technique provides for increasing the amount of light reaching a region of interest inside the body portion and maximizing homogeneity of the first and second detected light signals.
246 Citations
46 Claims
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1. An optical measurement device for use in non-invasive measurements on a patient'"'"'s body, the device comprising:
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an illumination assembly configured and operable to generate illuminating light of a predetermined wavelength range; a detection assembly configured and operable to concurrently provide transmission-mode and reflection-mode of light detection, the detection assembly comprising a first transmission-mode detector unit configured for detecting a first light signal indicative of the transmission of the illuminating light in the predetermined wavelength range through an illuminated body portion and generating first measured data indicative of the detected transmitted light, and a second reflection-mode detector unit operating simultaneously with said first detector and configured for detecting a second light signal indicative of the reflection of the illuminating light in the predetermined wavelength range from the illuminated body portion and generating second measured data indicative of the detected reflected light; and a light directing assembly comprising a light diffuser for scattering back light incident thereto, the light diffuser being oriented to redirect at least one of the illuminating, transmitted and reflected light components back towards the illuminated body portion to thereby cause further interaction of the redirected light with the body portion, and allow detection of the transmitted and reflected light components by said first and second detection units, thereby increasing amount of light reaching a region of interest inside the body portion and thus maximizing homogeneity of the first and second detected light signals. - 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)
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39. An optical measurement device for non-invasive measurements on a patient'"'"'s finger, the device comprising:
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a ring-like housing for enclosing a portion of the finger therein; an illumination assembly mounted on said housing, the illumination assembly being configured and operable to direct illuminating light of a predetermined wavelength range towards a portion of the finger under measurements; a detection assembly mounted on said housing, the detection assembly being configured and operable to concurrently provide transmission-mode and reflection-mode of light detection, the detection assembly comprising a first transmission-mode detector unit accommodated substantially opposite the illumination assembly for detecting a first light signal indicative of the transmission of the illuminating light in the predetermined wavelength range through the finger portion in the predetermined wavelength range and generating first measured data indicative of the detected transmitted light, and a second reflection-mode detector unit operating simultaneously with said first detector and accommodated for detecting a second light signal indicative of the reflection of the illuminating light in the predetermined wavelength range from the finger portion and generating second measured data indicative of the detected reflected light; a light diffuser accommodated for receiving light reflected from the finger portion and re-directing the received light back towards the finger portion to thereby cause further interaction of said light with said finger portion and allowing detection of the reflected light by said second reflection-mode detection unit, thereby increasing amount of light reaching a region of interest inside the finger portion and thus maximizing homogeneity of the first and second detected light signals.
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40. A method for use in non-invasive optical measurements on a patient'"'"'s body utilizing illumination of a region of interest inside the body portion by illuminating light of a predetermined wavelength range and detection of light response of the region of interest, the method comprising:
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collecting at least a part of light coming from the illuminated body portion and re-directing at least a part of the collected light back to the body portion to thereby cause further interaction of said light with the body portion, light coming from the body portion including transmission of the illuminating light through the illuminated body portion and reflection of the illuminating light from the illuminated body portion; concurrently detecting first and second light signals which are indicative of, respectively, the light transmitted through the body portion in the predetermined wavelength range and the light reflected from said body portion, and generating first measured data indicative of the detected transmitted light second measured data indicative of the detected reflected light; and analyzing the first and second measured data and generating at least one parameter related to the blood of said patient'"'"'s body; the method providing for increasing amount of light reaching the region of interest inside the body portion, and for maximizing homogeneity of the first and second detected light signals. - View Dependent Claims (41, 42, 43, 44, 45, 46)
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Specification