Patent US4379233A successfully refreshed from Google Patents.
US4379233A
Expired / Lapsed
US
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Optical arrangement for quantitative analysis instrument utilizing pulsed radiation emitting diodes
Assignee: Trebor Industries Inc
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Filing: 1981-05-27
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Granted: 1983-04-05
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Expires: 2001-05-27
Abstract
Abstract An instrument for quantitative analysis using a matrix of radiation emitting diodes has means for assuring that a sample receives substantially uniform radiation from each diode. In the preferred embodiment a lens is used to direct the radiation beams to a focal plane where there is a matte surface diffuser backed with an aperture to provide relatively uniform radiant energy field through the aperture to a sample chamber. With this arrangement the same energy distribution contacts the test samples from each of the radiation sources.
Inventors
- 👤 Scott B. Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:45
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/255; G01J3/0205; G01N21/31; G01N21/314; G01N21/35; G01N21/3563; G01N21/359; G01N21/55
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
163 words
An instrument for quantitative analysis of a sample comprising: a plurality of pulsed radiation emitting diodes positioned in a matrix to direct radiation to a sample; baffles separating the diodes in the matrix; narrow bandpass filters positioned adjacent the diodes to allow only preselected wavelengths of radiation to be directed to the sample; a sample chamber having at least portions thereof transparent to the radiation from the diodes and bandpass filters; lens means positioned adjacent the matrix of diodes and bandpass filters to that radiation from all of the diodes passes through the lens and is bent toward the center of a focal plane adjacent the sample chamber; radiation altering means to allow radiation from the lens means to pass to the sample but with uniform energy distribution from each of the diodes; photodetecting means for detecting the radiation which passes through a sample in the sample chamber; means to calculate and display quantitative analysis based on the output of the photodetecting means.
Claim 2
Dependent Claim
163 words
An instrument for quantitative analysis of a sample comprising: a plurality of pulsed radiation emitting diodes positioned in a matrix to direct radiation to a sample; baffles separating the diodes in the matrix; narrow bandpass filters positioned adjacent the diodes to allow only preselected wavelengths of radiation to be directed to the sample; a sample chamber having at least portions thereof transparent to the radiation from the diodes and bandpass filters; lens means positioned adjacent the matrix of diodes and bandpass filters to that radiation from all of the diodes passes through the lens and is bent toward the center of a focal plane adjacent the sample chamber; radiation altering means to allow radiation from the lens means to pass to the sample but with uniform energy distribution from each of the diodes; photodetecting means for detecting the radiation which passes through a sample in the sample chamber; means to calculate and display quantitative analysis based on the output of the photodetecting means.
Claim 3
Dependent Claim
27 words
An instrument as in claim 1 wherein the radiation altering means is a light diffusing plate means positioned substantially at the focal point of the lens means.
Claim 4
Dependent Claim
26 words
An instrument as in claim 2 further comprising an opaque plate with a small aperature positioned between the light diffusing plate means and the sample chamber.
Claim 5
Dependent Claim
20 words
An instrument as claimed in claim 2 wherein the light diffusing plate means is a pair spaced apart diffuser plates.
Claim 6
Dependent Claim
23 words
An instrument as claimed in claim 4 wherein each diffuser plate is transparent plastic with a nonglossy matte surface on each side thereof.
Claim 7
Dependent Claim
15 words
An instrument as claimed in claim 1 wherein the lens means is a Fresnel lens.
References Cited (Backward Citations)
US4229103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |