Patent US5782861A successfully refreshed from Google Patents.
US4548505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor for spectral analyzer for living tissues
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1982-04-19
•
Granted: 1985-10-22
•
Expires: 2002-04-19
Abstract
Abstract A sensor for a spectral analyzer includes a relatively movable holder and probe, where the probe is fitted with a reflector, and the holder is provided with a pair of adjacent optical fibers for transmitting/receiving light. When the probe abuts the surface of the object to be measured, the probe and holder move relatively so that the fiber pair approach the reflector. A switch activating the analyzer for data collection is operated in response to the change in reflected light intensity caused by the relative movement.
Inventors
- 👤 Kimizo Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B5/68; A61B5/6801; A61B5/6843; G; G01; G01N; G01N21/00; G01N21/84; G01N21/85; G01N21/8507
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
A sensor for a spectral analyzer for living tissues comprising; a holder, a bundle of fibers held in position in said holder and connected to the analyzer, a probe including a reflector fitted to an end thereof, said probe being axially movable by a predetermined distance with respect to said holder, a light transmitting/receiving fiber connected to a switch circuit of said analyzer, and a spring positioned between said holder and said probe for urging said reflector away from a tip of the light transmitting/receiving fiber, said switch being actuated so as to be turned on in response to a decrease in the intensity of the light reflected into said fiber due to a decrease in a distance between said tip of the light transmitting/receiving fiber and said reflector.
Claim 2
Dependent Claim
129 words
A sensor for a spectral analyzer for living tissues comprising; a holder, a bundle of fibers held in position in said holder and connected to the analyzer, a probe including a reflector fitted to an end thereof, said probe being axially movable by a predetermined distance with respect to said holder, a light transmitting/receiving fiber connected to a switch circuit of said analyzer, and a spring positioned between said holder and said probe for urging said reflector away from a tip of the light transmitting/receiving fiber, said switch being actuated so as to be turned on in response to a decrease in the intensity of the light reflected into said fiber due to a decrease in a distance between said tip of the light transmitting/receiving fiber and said reflector.
Claim 3
Dependent Claim
23 words
The sensor as claimed in claim 1 wherein said light transmitting/receiving fiber comprises a pair of adjacent fibers adjacent said bundle of fibers.
Claim 4
Dependent Claim
24 words
The sensor as claimed in claim 1 wherein said light transmitting/receiving fiber comprises a pair of adjacent fibers incorporated in said bundle of fibers.
Claim 5
Dependent Claim
45 words
The sensor as claimed in claim 1 wherein said switch circuit comprises a photoelectric device for converting received light into a current, and amplifier means for converting said current into a voltage signal, said switch being operated in response to changes in said voltage signal.
Claim 6
Dependent Claim
26 words
The sensor as claimed in claim 1 wherein said light transmitting/receiving fiber comprises a single fiber having a branch, and a half-mirror disposed at the branch.
Claim 7
Dependent Claim
23 words
The sensor as claimed in claim 1 wherein said end of said probe fitted with said reflector faces an end of said holder.
Claim 8
Dependent Claim
30 words
The sensor as claimed in claim 1 wherein said end of said probe fitted with said reflector faces an intermediate portion of said holder containing ends of said transmitting/receiving fiber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |