US5689110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calibration method and apparatus for optical scanner
Assignee: Biometric Imaging Inc
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Filing: 1996-06-27
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Granted: 1997-11-18
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Expires: 2016-06-27
Abstract
Abstract A calibration method and device for a fluorescence spectrometer which uses fluorescence from a homogeneous solid state standard as the source of calibration fluorescence and wherein the solid state standard may be built into the optical scanner and the calibration may be automatically performed as a routine step when using the optical scanner. A gold standard establishes fluorescent units, and the fluorescence spectrometer is calibrated by reference to calibration standards, such as calibration rubies, which are themselves rated against the gold standard and built into the fluorescence spectrometer to provide an unchanging reference to the gold standard and by which simultaneous calibration of two or more channels of a multi-channel fluorescence spectrometer may be accomplished, including automatically calibrating a multi-channel optical scanner when it is turned on to achieve an acceptable level of sensitivity in each channel and to adjust for any relative shift in sensitivity between the channels.
Inventors
- 👤 Louis J. Dietz
- 👤 Thomas M. Baer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:39
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/1012; G01N21/00; G01N21/17; G01N21/25; G01N21/27; G01N21/274; G01J; G01J3/00; G01J3/28; G01J2003/2866
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
113 words
In a method for calibrating two channels of a fluorescence spectrometer, the steps comprising: providing a fluorescence spectrometer having a first channel and a second channel; exciting a calibration standard to generate a fluorescent calibration beam; separating said fluorescent calibration beam into a resultant first beam and a resultant second beam; detecting said resultant first beam in said first channel to generate a first intensity value; and detecting said resultant second beam in said second channel to generate a second intensity value, wherein a current ratio is determined from said first intensity value and said second intensity value, and a calibration factor is determined by comparing said current ratio to a predetermined ratio.
Claim 2
Dependent Claim
113 words
In a method for calibrating two channels of a fluorescence spectrometer, the steps comprising: providing a fluorescence spectrometer having a first channel and a second channel; exciting a calibration standard to generate a fluorescent calibration beam; separating said fluorescent calibration beam into a resultant first beam and a resultant second beam; detecting said resultant first beam in said first channel to generate a first intensity value; and detecting said resultant second beam in said second channel to generate a second intensity value, wherein a current ratio is determined from said first intensity value and said second intensity value, and a calibration factor is determined by comparing said current ratio to a predetermined ratio.
Claim 3
Dependent Claim
19 words
In a method as in claim 1, wherein the step of exciting said calibration standard includes exciting a ruby.
Claim 4
Dependent Claim
46 words
In a method as in claim 2, comprising the additional steps of: sensing a temperature of said ruby; and compensating said second intensity value and said first intensity value for a change of intensity of said calibration beam caused by the temperature of said calibration standard.
Claim 5
Dependent Claim
22 words
A method as in claim 1, further comprising the step of adjusting said first channel as a function of said calibration factor.
Claim 6
Dependent Claim
22 words
A method as in claim 1, further comprising the step of adjusting said second channel as a function of said calibration factor.
Claim 7
Dependent Claim
34 words
A method as in claim 1, further comprising the steps of comparing said calibration factor with a predetermined value; and notifying a user concerning the comparison between said calibration factor and said predetermined value.
Claim 8
Dependent Claim
240 words
In a method for calibrating a fluorescence spectrometer having a plurality of channels, the steps comprising: providing a fluorescence spectrometer having a long wavelength channel and a short wavelength channel; exciting a calibration standard to generate a first calibration beam; separating said first calibration beam into a first resultant long wavelength calibration beam and a first resultant short wavelength calibration beam; detecting said first resultant long wavelength calibration beam by said long wavelength channel to generate a first long wavelength intensity value; detecting said first resultant short wavelength calibration beam by said short wavelength channel to generate a first short wavelength intensity value; generating a first ratio between said long wavelength calibration intensity value and said short wavelength calibration intensity value; subsequently exciting said calibration standard to generate a second calibration beam; separating said second calibration beam into a second resultant long wavelength calibration beam and a second resultant short wavelength calibration beam; detecting said second resultant long wavelength calibration beam in said long wavelength channel to generate a second long wavelength intensity value; detecting said second resultant short wavelength calibration beam in said short wavelength channel to generate a second short wavelength intensity value; generating a second ratio between said second long wavelength intensity value and said second short wavelength intensity value; and generating a calibration factor between said second ratio and said first ratio, wherein data generated by the fluorescence spectrometer may be calibrated by said calibration factor.
Claim 9
Dependent Claim
240 words
In a method for calibrating a fluorescence spectrometer having a plurality of channels, the steps comprising: providing a fluorescence spectrometer having a long wavelength channel and a short wavelength channel; exciting a calibration standard to generate a first calibration beam; separating said first calibration beam into a first resultant long wavelength calibration beam and a first resultant short wavelength calibration beam; detecting said first resultant long wavelength calibration beam by said long wavelength channel to generate a first long wavelength intensity value; detecting said first resultant short wavelength calibration beam by said short wavelength channel to generate a first short wavelength intensity value; generating a first ratio between said long wavelength calibration intensity value and said short wavelength calibration intensity value; subsequently exciting said calibration standard to generate a second calibration beam; separating said second calibration beam into a second resultant long wavelength calibration beam and a second resultant short wavelength calibration beam; detecting said second resultant long wavelength calibration beam in said long wavelength channel to generate a second long wavelength intensity value; detecting said second resultant short wavelength calibration beam in said short wavelength channel to generate a second short wavelength intensity value; generating a second ratio between said second long wavelength intensity value and said second short wavelength intensity value; and generating a calibration factor between said second ratio and said first ratio, wherein data generated by the fluorescence spectrometer may be calibrated by said calibration factor.
Claim 10
Dependent Claim
42 words
A method as in claim 7, comprising the dditional steps of: determining a first fluorescent dye slope; determining a second fluorescent dye slope; adjusting said first dye slope by said calibration factor; and adjusting said second dye slope by said calibration factor.
Claim 11
Dependent Claim
243 words
In a method for calibrating a fluorescence spectrometer having a plurality of channels, the steps comprising: providing a fluorescence spectrometer having a long wavelength channel and a short wavelength channel; exciting a ruby to generate a first calibration beam; separating said first calibration beam into a first resultant long wavelength calibration beam and said first resultant short wavelength calibration beam; detecting said first resultant long wavelength calibration beam by said long wavelength channel to generate a first long wavelength intensity value; detecting said first resultant short wavelength calibration beam by said short wavelength channel to generate a first short wavelength intensity value; generating a first ruby ratio between said long wavelength calibration intensity value and said short wavelength calibration intensity value; subsequently exciting said ruby to generate a second calibration beam; separating said second calibration beam into a second resultant long wavelength calibration beam and a second resultant short wavelength calibration beam; detecting said second resultant long wavelength calibration beam in said long wavelength channel to generate a second long wavelength intensity value; detecting said second resultant short wavelength calibration beam in said short wavelength channel to generate a second short wavelength intensity value; generating a second ruby ratio between said second long wavelength intensity value and said second short wavelength intensity value; and generating a calibration factor by dividing said second ruby ratio by said first ruby ratio, wherein data generated by the fluorescence spectrometer may be calibrated by said calibration factor.
Claim 12
Dependent Claim
243 words
In a method for calibrating a fluorescence spectrometer having a plurality of channels, the steps comprising: providing a fluorescence spectrometer having a long wavelength channel and a short wavelength channel; exciting a ruby to generate a first calibration beam; separating said first calibration beam into a first resultant long wavelength calibration beam and said first resultant short wavelength calibration beam; detecting said first resultant long wavelength calibration beam by said long wavelength channel to generate a first long wavelength intensity value; detecting said first resultant short wavelength calibration beam by said short wavelength channel to generate a first short wavelength intensity value; generating a first ruby ratio between said long wavelength calibration intensity value and said short wavelength calibration intensity value; subsequently exciting said ruby to generate a second calibration beam; separating said second calibration beam into a second resultant long wavelength calibration beam and a second resultant short wavelength calibration beam; detecting said second resultant long wavelength calibration beam in said long wavelength channel to generate a second long wavelength intensity value; detecting said second resultant short wavelength calibration beam in said short wavelength channel to generate a second short wavelength intensity value; generating a second ruby ratio between said second long wavelength intensity value and said second short wavelength intensity value; and generating a calibration factor by dividing said second ruby ratio by said first ruby ratio, wherein data generated by the fluorescence spectrometer may be calibrated by said calibration factor.
Claim 13
Independent Claim
132 words
A device for calibrating a fluorescence spectrometer having a first channel and a second channel, comprising: a calibration standard configured to generate a fluorescent calibration beam when impinged by a light beam from a fluorescence spectrometer; a beam splitter configured to separate said fluorescent calibration beam into a resultant second beam and a resultant first beam, wherein said resultant second beam is detected in a second channel of the fluorescence spectrometer to generate a second intensity value and said resultant first beam is detected in a first channel of the fluorescence spectrometer to generate a first intensity value; means for determining a current ratio from said first intensity value and said second intensity value; and means for determining a calibration factor as a ratio of said current ratio and a predetermined ratio.
Claim 14
Independent Claim
132 words
A device for calibrating a fluorescence spectrometer having a first channel and a second channel, comprising: a calibration standard configured to generate a fluorescent calibration beam when impinged by a light beam from a fluorescence spectrometer; a beam splitter configured to separate said fluorescent calibration beam into a resultant second beam and a resultant first beam, wherein said resultant second beam is detected in a second channel of the fluorescence spectrometer to generate a second intensity value and said resultant first beam is detected in a first channel of the fluorescence spectrometer to generate a first intensity value; means for determining a current ratio from said first intensity value and said second intensity value; and means for determining a calibration factor as a ratio of said current ratio and a predetermined ratio.
Claim 15
Dependent Claim
15 words
A device as in claim 10, wherein said calibration standard is glass doped with ions.
Claim 16
Dependent Claim
13 words
A device as in claim 10, wherein said calibration standard is a crystal.
Claim 17
Dependent Claim
12 words
A device as in claim 12, wherein said crystal is a ruby.
Claim 18
Dependent Claim
29 words
A device as in claim 13, wherein said ruby is configured to have a length dimension and a width dimension, said length dimension not equal to said width dimension.
Claim 19
Dependent Claim
26 words
A device as in claim 10, wherein said means for determining a calibration factor includes a temperature sensor to determine the temperature of said calibration standard.
References Cited (Backward Citations)
US2850239A
Cited
US3956201A
Cited
US3790492A
Cited
US3826364B1
Cited
US3826364A
Cited
US4035085A
Cited
US3854050A
Cited
US3900265A
Cited
US3973129A
Cited
US3999866A
Cited
US4249826A
Cited
US4150295A
Cited
US4492121A
Cited
US4599901A
Cited
US4542987A
Cited
US4661711A
Cited
US5073498A
Cited
US5084394A
Cited
US4741043A
Cited
US4741043B1
Cited
US4683579A
Cited
EP0266881A2
Cited
SU1578478A1
Cited
US4845552A
Cited
US5205291A
Cited
US5123738A
Cited
US5032731A
Cited
US4979824A
Cited
US5107422A
Cited
US5274240A
Cited
US5091652A
Cited
US5315993A
Cited
US5459677A
Cited
US5243401A
Cited
US5251006A
Cited
US5117466A
Cited
US5293046A
Cited
US5547849A
Cited
US5556764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-17 | 2001-05-19 | 2001-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-17 | 2005-05-19 | 2005-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-17 | 2009-05-19 | 2009-11-18 | $7700.00 | Window Closed / Lapsed |