US4012147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slit-less spectrometer
Assignee: Individual
•
Filing: 1974-11-06
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Granted: 1977-03-15
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Expires: 1994-11-06
Abstract
Abstract The use of an optical fiber for providing a point source of radiation at the entrance of a spectrometer obviates the necessity for an entrance slit at the input end of the device. Improved optical imaging at decreased expense is achieved.
Inventors
- 👤 George Edouard Walrafen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:39
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/12; G01J3/14; G01J3/02; G01J3/0205; G01J3/0208; G01J3/0218; G01J3/0221; G01J2003/0281
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
166 words
A spectrometer arrangement comprising a rigid support member and optical means affixed thereto for defining an optical path between an object plane and an image plane, said arrangement being adapted for receiving an optical fiber including core constituents and having a first end of diameter d, said arrangement including means including an optical fiber coupler cooperative with said fiber for providing at said first end a source of visible radiation of diameter d including spectral components characteristic of said constituents in said object plane, optical means for forming said radiation into a beam of parallel rays, means operative upon said beam to produce a plurality of dispersed chromatically variant images of said source each representative of a different one of said spectral components, (and) detection means for detecting the energy density of each of said images, said detection means having a light-receiving surface of about diameter d located in said image plane and means for moving said light-receiving surface from one of said images to another.
Claim 2
Dependent Claim
166 words
A spectrometer arrangement comprising a rigid support member and optical means affixed thereto for defining an optical path between an object plane and an image plane, said arrangement being adapted for receiving an optical fiber including core constituents and having a first end of diameter d, said arrangement including means including an optical fiber coupler cooperative with said fiber for providing at said first end a source of visible radiation of diameter d including spectral components characteristic of said constituents in said object plane, optical means for forming said radiation into a beam of parallel rays, means operative upon said beam to produce a plurality of dispersed chromatically variant images of said source each representative of a different one of said spectral components, (and) detection means for detecting the energy density of each of said images, said detection means having a light-receiving surface of about diameter d located in said image plane and means for moving said light-receiving surface from one of said images to another.
Claim 3
Dependent Claim
33 words
A spectrometer in accordance with claim 1 wherein said beam of parallel rays has a diameter greater than d, said spectrometer also including a lens for focusing said beam in said image plane.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |