US3708227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectral analysis instrument with programmed spectral slit width
Assignee: Optical Coating Laboratory Inc
•
Filing: 1971-04-19
•
Granted: 1973-01-02
•
Expires: 1991-04-19
Abstract
Abstract A monochromator having a corner mirror scanning wheel and a fixed baffle adjacent the scanning wheel to vary the effective height of an exit slit. The height profile of the baffle is adapted to selectively vary the radiant energy passed through this exit slit at different wavelengths so as to provide the desired balance among resolution, signal-to-noise ratio and the dynamic range of the background signal over the scanned portion of the spectrum.
Inventors
- 👤 H Kruegle
- 👤 B Krakow
- 👤 S Dolin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:44
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
408 words
A spectral analysis instrument comprising means for collecting radiant energy from a source thereof, means for dispersing the collected radiant energy into components of different wavelengths which have associated therewith different quantities of radiant energy, means for focusing the components of different wavelengths at different locations on an intermediate focal plane, first exit slit means having a first cross sectional area through which a first series of the components of different wavelengths having a relatively low quantity of radiant energy associated therewith pass to a first receiver, second exit slit means having a second cross sectional area through which a second series of the components of different wavelengths having a relatively high quantity of radiant energy associated therewith pass to a second receiver, said first cross sectional area being greater than said second cross sectional area to facilitate the passage of radiant energy through said first exit slit means to said first receiver with said first series of components of different wavelengths and to at least partially block the passage of said radiant energy through said second exit slit means to said second receiver with the second series of components of different wavelengths, optical means for directing the first series of components of different wavelengths away from said intermediate focal plane toward said first exit slit means along outgoing paths which are substantially coincident for at least a portion of their lengths with incoming paths along which said second series of components of different wavelengths travel toward said intermediate focal plane and for directing the second series of components of different wavelengths away from said intermediate focal plane toward said second exit slit means along outgoing paths which are substantially coincident for at least a portion of their lengths with incoming paths along which said first series of components of different wavelengths travel toward said intermediate focal plane, and stationary baffle means positioned close to said intermediate focal plane in the incoming paths of at least a portion of one of said series of components of different wavelengths and the outgoing paths of at least a portion of the other of said series of components of different wavelengths to intercept predetermined amounts of the radiant energy associated with at least a portion of the first series of components of different wavelengths to thereby at least partially control the radiant energy transmitted through the relatively large cross sectional area of said first exit slit means to said first receiver.
Claim 2
Dependent Claim
408 words
A spectral analysis instrument comprising means for collecting radiant energy from a source thereof, means for dispersing the collected radiant energy into components of different wavelengths which have associated therewith different quantities of radiant energy, means for focusing the components of different wavelengths at different locations on an intermediate focal plane, first exit slit means having a first cross sectional area through which a first series of the components of different wavelengths having a relatively low quantity of radiant energy associated therewith pass to a first receiver, second exit slit means having a second cross sectional area through which a second series of the components of different wavelengths having a relatively high quantity of radiant energy associated therewith pass to a second receiver, said first cross sectional area being greater than said second cross sectional area to facilitate the passage of radiant energy through said first exit slit means to said first receiver with said first series of components of different wavelengths and to at least partially block the passage of said radiant energy through said second exit slit means to said second receiver with the second series of components of different wavelengths, optical means for directing the first series of components of different wavelengths away from said intermediate focal plane toward said first exit slit means along outgoing paths which are substantially coincident for at least a portion of their lengths with incoming paths along which said second series of components of different wavelengths travel toward said intermediate focal plane and for directing the second series of components of different wavelengths away from said intermediate focal plane toward said second exit slit means along outgoing paths which are substantially coincident for at least a portion of their lengths with incoming paths along which said first series of components of different wavelengths travel toward said intermediate focal plane, and stationary baffle means positioned close to said intermediate focal plane in the incoming paths of at least a portion of one of said series of components of different wavelengths and the outgoing paths of at least a portion of the other of said series of components of different wavelengths to intercept predetermined amounts of the radiant energy associated with at least a portion of the first series of components of different wavelengths to thereby at least partially control the radiant energy transmitted through the relatively large cross sectional area of said first exit slit means to said first receiver.
Claim 3
Dependent Claim
150 words
A spectral analysis instrument as set forth in claim 1 wherein said optical means includes first and second mirror means mounted in a predetermined angular relationship with each other and means for moving said first and second mirror means simultaneously across different portions of said intermediate focal plane, said first mirror means being positioned as it moves across said intermediate focal plane to receive each of the components of different wavelengths of said second series in turn and to sequentially reflect them to said second mirror means and to receive from said second mirror means each of said components of different wavelength of said first series in turn and to sequentially reflect them toward said first exit slit means, said second mirror means being positioned as it moves across said intermediate focal plane to receive each of the components of different wavelengths of said first series in turn 44000000000000000000000000000000000000000000000000000000000000000 00000
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |