Patent US5638818A successfully refreshed from Google Patents.
US5638818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low noise optical probe
Assignee: JPMorgan Chase Bank NA
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Filing: 1994-11-01
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Granted: 1997-06-17
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Expires: 2014-11-01
Abstract
Abstract An optical probe for measurements, which is particularly suited to reduce noise in measurements taken on an easily compressible material, such as a finger, a toe, a forehead, an earlobe, or a lip. The probe includes a base having an aperture which leads to a chamber. The base is placed adjacent a portion of the material, the chamber being placed directly adjacent any easily compressible portion of the material. A photodetector is located within the chamber and does not contact the material. A light emitting diode (LED) is affixed to the material, opposite the photodetector and above the chamber. The material which is supported by the aperture and therefore rests above or has intruded into the chamber is inhibited from compression since nothing comes in contact with this portion of the material, even when the material moves. Thus, light from the LED is directed through a stabilized portion of the material, i.e., the optical path length through which light travels is stabilized, even during motion of the material. This reduces noise in the signal measured by the photodetector. A scattering medium is interposed between the LED and the material, between the material and the photodetector, or between the LED and the material as well as between the material and the photodetector. The scattering medium is used to improve the signal-to-noise ratio of the received optical signal.
Inventors
- 👤 Mohamed Kheir Diab
- 👤 Esmaiel Kiani-Azarbayjany
- 👤 James M. Lepper, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:32
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B5/14551; A61B5/14552; A61B5/02; A61B5/024; A61B5/02416; A61B5/02427; A61B5/68; A61B5/6801; A61B5/6813; A61B5/6825; A61B5/6826; A61B5/6829; A61B5/683; A61B5/6838; A61B2562/00; A61B2562/08; A61B2562/12; H; H05; H05K; H05K1/00; H05K1/18; H05K1/189; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
169 words
An energy sensor comprising: a housing having a support surface for a tissue material which is to be analyzed; a chamber having an entrance in the form of an aperture defined on said housing support surface such that, when said housing is positioned adjacent said tissue material, a first portion of said tissue material covers said aperture and is supported by said support surface around said aperture; a detector located in said chamber, said detector positioned in said chamber in a manner such that said portion of said tissue material which covers said aperture is isolated from said detector; a first portion of optically scattering medium positioned at the support surface such that when said support surface is placed adjacent the tissue material, the optically scattering medium is located between the detector and the tissue, said optically scattering medium comprising a conformable material; and a light energy source in communication with said detector and said chamber via said aperture, said energy source configured to transmit energy to said detector.
Claim 2
Dependent Claim
169 words
An energy sensor comprising: a housing having a support surface for a tissue material which is to be analyzed; a chamber having an entrance in the form of an aperture defined on said housing support surface such that, when said housing is positioned adjacent said tissue material, a first portion of said tissue material covers said aperture and is supported by said support surface around said aperture; a detector located in said chamber, said detector positioned in said chamber in a manner such that said portion of said tissue material which covers said aperture is isolated from said detector; a first portion of optically scattering medium positioned at the support surface such that when said support surface is placed adjacent the tissue material, the optically scattering medium is located between the detector and the tissue, said optically scattering medium comprising a conformable material; and a light energy source in communication with said detector and said chamber via said aperture, said energy source configured to transmit energy to said detector.
Claim 3
Dependent Claim
29 words
The energy sensor of claim 1, wherein said light energy source is positioned generally opposite said chamber when said housing is positioned adjacent said first portion of tissue material.
Claim 4
Dependent Claim
13 words
The energy sensor of claim 1, wherein said chamber further comprises reflective walls.
Claim 5
Dependent Claim
13 words
The energy sensor of claim 1, wherein said sensor forms an oximetry sensor.
Claim 6
Dependent Claim
19 words
The energy sensor of claim 4, wherein said sensor is configured to attach to the digit of a patient.
Claim 7
Dependent Claim
12 words
The energy sensor of claim 5, wherein said digit is a finger.
Claim 8
Dependent Claim
12 words
The energy sensor of claim 5, wherein said digit is a toe.
Claim 9
Dependent Claim
15 words
The energy sensor of claim 1, wherein said optically scattering medium comprises a conformable plastic.
Claim 10
Dependent Claim
21 words
The energy sensor of claim 1, wherein said chamber has walls that are formed such that said chamber is generally cone-shaped.
Claim 11
Dependent Claim
197 words
An energy sensor comprising: a housing having a support surface for a tissue material which is to be analyzed; a chamber having an entrance in the form of an aperture defined on said housing support surface such that, when said housing is positioned adjacent said tissue material, a first portion of said tissue material covers said aperture and is supported by said support surface around said aperture; a light energy source; a detector located in said chamber, said detector positioned in said chamber in a manner such that said portion of said tissue material which covers said aperture is isolated from said detector by said optically scattering medium, and wherein said light energy source communicates with said detector via said aperture and said optically scattering medium; and a first portion of optically scattering medium positioned at the support surface such that when said support surface is placed adjacent the tissue material, the optically scattering medium is located between the detector and the tissue, wherein said first portion of optically scattering medium is a conformable material which does not significantly perturb the tissue material in the aperture when brought into contact with the first portion of tissue material.
Claim 12
Dependent Claim
197 words
An energy sensor comprising: a housing having a support surface for a tissue material which is to be analyzed; a chamber having an entrance in the form of an aperture defined on said housing support surface such that, when said housing is positioned adjacent said tissue material, a first portion of said tissue material covers said aperture and is supported by said support surface around said aperture; a light energy source; a detector located in said chamber, said detector positioned in said chamber in a manner such that said portion of said tissue material which covers said aperture is isolated from said detector by said optically scattering medium, and wherein said light energy source communicates with said detector via said aperture and said optically scattering medium; and a first portion of optically scattering medium positioned at the support surface such that when said support surface is placed adjacent the tissue material, the optically scattering medium is located between the detector and the tissue, wherein said first portion of optically scattering medium is a conformable material which does not significantly perturb the tissue material in the aperture when brought into contact with the first portion of tissue material.
Claim 13
Dependent Claim
17 words
The energy sensor of claim 10, wherein said first portion of optically scattering medium is reticulated foam.
Claim 14
Dependent Claim
18 words
The energy sensor of claim 11, wherein said first portion of optically scattering medium is reticulated polyurethane foam.
Claim 15
Dependent Claim
16 words
The energy sensor of claim 10, wherein said optically scattering medium is an optically scattering gel.
Claim 16
Dependent Claim
18 words
The energy sensor of claim 10, wherein said first portion of optically scattering medium comprises a conformable plastic.
Claim 17
Dependent Claim
106 words
An optical sensor comprising: a light energy source; a housing having a support surface adapted to be placed adjacent tissue material to be analyzed, said housing having a chamber defining an aperture in said support surface; a photodetector within said chamber and spaced away from said aperture in said support surface, and wherein said light energy source optically communicates with said photodetector and said chamber via said aperture; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between said photodetector and said tissue material, said optically scattering medium comprising a conformable material.
Claim 18
Dependent Claim
106 words
An optical sensor comprising: a light energy source; a housing having a support surface adapted to be placed adjacent tissue material to be analyzed, said housing having a chamber defining an aperture in said support surface; a photodetector within said chamber and spaced away from said aperture in said support surface, and wherein said light energy source optically communicates with said photodetector and said chamber via said aperture; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between said photodetector and said tissue material, said optically scattering medium comprising a conformable material.
Claim 19
Dependent Claim
14 words
The optical sensor of claim 15, wherein said optically scattering medium comprises reticulated foam.
Claim 20
Dependent Claim
16 words
The optical sensor of claim 16, wherein said reticulated foam comprises 2.2 pound polyurethane reticulated foam.
Claim 21
Dependent Claim
15 words
The optical sensor of claim 15, wherein said scattering medium comprises an optically scattering gel.
Claim 22
Dependent Claim
14 words
The optical sensor of claim 15, wherein said scattering medium comprises a conformable plastic.
Claim 23
Dependent Claim
120 words
An optical sensor comprising: a light energy source; a photodetector; a housing having a support surface adapted to be placed adjacent a tissue material which is to be analyzed, said housing having a chamber, said chamber defining an aperture in said support surface and extending from said support surface through at least a portion of said housing, said photodetector positioned in said chamber spaced from said aperture and wherein said light source optically communicates with said photodetector via said aperture and chamber; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between said tissue material and said photodetector, said optically scattering medium comprising a conformable material.
Claim 24
Dependent Claim
120 words
An optical sensor comprising: a light energy source; a photodetector; a housing having a support surface adapted to be placed adjacent a tissue material which is to be analyzed, said housing having a chamber, said chamber defining an aperture in said support surface and extending from said support surface through at least a portion of said housing, said photodetector positioned in said chamber spaced from said aperture and wherein said light source optically communicates with said photodetector via said aperture and chamber; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between said tissue material and said photodetector, said optically scattering medium comprising a conformable material.
Claim 25
Dependent Claim
27 words
The optical sensor of claim 20, wherein said photodetector is positioned within said chamber such that said optically scattering medium is between said photodetector and said aperture.
Claim 26
Dependent Claim
21 words
The optical sensor of claim 21, wherein said chamber is 3-4 millimeters deep as measured from said photodetector to said aperture.
Claim 27
Dependent Claim
11 words
The optical sensor of claim 20, wherein said housing is opaque.
Claim 28
Dependent Claim
13 words
The optical sensor of claim 20, wherein said sensor is an oximetry sensor.
Claim 29
Dependent Claim
19 words
The optical sensor of claim 24, wherein said sensor is adapted to attachment to a digit of a patient.
Claim 30
Dependent Claim
15 words
The optical sensor of claim 25, wherein said digit is a finger or a toe.
Claim 31
Dependent Claim
101 words
An optical sensor comprising: a light energy source; a photodetector; a housing having a support surface adapted to be placed adjacent a material which is to be analyzed, said housing having a chamber including said photodetector and defining an aperture in said support surface and extending from said support surface, and wherein said light source optically communicates with said photodetector via said aperture; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between said tissue material and said photodetector, wherein said scattering medium comprises a reticulated foam.
Claim 32
Dependent Claim
101 words
An optical sensor comprising: a light energy source; a photodetector; a housing having a support surface adapted to be placed adjacent a material which is to be analyzed, said housing having a chamber including said photodetector and defining an aperture in said support surface and extending from said support surface, and wherein said light source optically communicates with said photodetector via said aperture; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between said tissue material and said photodetector, wherein said scattering medium comprises a reticulated foam.
Claim 33
Dependent Claim
18 words
An optical sensor as defined in claim 27, wherein said reticulated foam comprises 2.2 pound polyurethane reticulated foam.
Claim 34
Dependent Claim
102 words
An optical sensor comprising: a light energy source; a photodetector; a housing having a support surface adapted to be placed adjacent a material which is to be analyzed, said housing having a chamber including said photodetector and defining an aperture in said support surface and extending from said support surface, and wherein said light source optically communicates with said photodetector via said aperture; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between the tissue material and said detector, wherein said scattering medium comprises an optically scattering gel.
Claim 35
Dependent Claim
102 words
An optical sensor comprising: a light energy source; a photodetector; a housing having a support surface adapted to be placed adjacent a material which is to be analyzed, said housing having a chamber including said photodetector and defining an aperture in said support surface and extending from said support surface, and wherein said light source optically communicates with said photodetector via said aperture; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between the tissue material and said detector, wherein said scattering medium comprises an optically scattering gel.
Claim 36
Dependent Claim
101 words
An optical sensor comprising: a light energy source; a photodetector; a housing having a support surface adapted to be placed adjacent a material which is to be analyzed, said housing having a chamber including said photodetector and defining an aperture in said support surface and extending from said support surface, and wherein said light source optically communicates with said photodetector via said aperture; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between said tissue material and said photodetector, wherein said scattering medium comprises a conformable plastic.
Claim 37
Dependent Claim
101 words
An optical sensor comprising: a light energy source; a photodetector; a housing having a support surface adapted to be placed adjacent a material which is to be analyzed, said housing having a chamber including said photodetector and defining an aperture in said support surface and extending from said support surface, and wherein said light source optically communicates with said photodetector via said aperture; and an optically scattering medium positioned such that when said support surface is placed adjacent the tissue material, the optically scattering medium is between said tissue material and said photodetector, wherein said scattering medium comprises a conformable plastic.
References Cited (Backward Citations)
US3103214A
Cited
US3463142A
Cited
US3704706A
Cited
US4129124A
Cited
US4380240A
Cited
US4321930A
Cited
US4334544A
Cited
US4528986A
Cited
EP0074428B1
Cited
US4621643A
Cited
US4938218A
Cited
US4913150A
Cited
US4824242A
Cited
US4865038A
Cited
US4880304A
Cited
US4867165A
Cited
US5031608A
Cited
US4907594A
Cited
US4825879A
Cited
US4927264A
Cited
US4825872A
Cited
US5099842A
Cited
US5086229A
Cited
WO1992001894A1
Cited
US5109848A
Cited
EP0404562A2
Cited
US5058588A
Cited
US5224478A
Cited
US5080098A
Cited
US5125403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-16 | 2000-12-16 | 2001-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-16 | 2004-12-16 | 2005-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-16 | 2008-12-16 | 2009-06-17 | $7700.00 | Window Closed / Lapsed |