Patent US5139335A successfully refreshed from Google Patents.
US5139335A
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US
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Holographic grating imaging spectrometer
Assignee: Sets Inc
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Filing: 1990-08-24
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Granted: 1992-08-18
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Expires: 2010-08-24
Abstract
Abstract A spectrometer apparatus is provided including means for focusing a light beam with a concave holographic grating, means for passing light reflected from the grating through a step order filter to an array detector and means for processing signals from the array detector. The spectrometer permits monitoring a plurality of grating orders simultanously without mechanical scanning.
Inventors
- 👤 Thomas F. Lundeen
- 👤 Jonathan C. Gradie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:23
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/12; G01J3/18; G01J3/1838; G01J3/28; G01J3/2803; G01J2003/1273; G01J2003/1828
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
A spectrometer apparatus which comprises means for focusing a light beam onto a concave holographic astigmatic grating capable of focusing light dispersed by said grating onto a flat image plane thereby to produce a reflected light beam having an interference pattern, a step order filter positioned to permit said reflected beam to be transmitted therethrough, a two-dimensional multielement array detector positioned at the focal plane of the concave grating to detect a light beam transmitted through said filter and to produce a detected signal and means for reading said detected signal. PG,12
Claim 2
Dependent Claim
92 words
A spectrometer apparatus which comprises means for focusing a light beam onto a concave holographic astigmatic grating capable of focusing light dispersed by said grating onto a flat image plane thereby to produce a reflected light beam having an interference pattern, a step order filter positioned to permit said reflected beam to be transmitted therethrough, a two-dimensional multielement array detector positioned at the focal plane of the concave grating to detect a light beam transmitted through said filter and to produce a detected signal and means for reading said detected signal. PG,12
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein said filter has between one and two steps.
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) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |