US4300835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Attenuator for stray light produced in monochromators
Assignee: PE Manufacturing GmbH
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Filing: 1980-05-02
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Granted: 1981-11-17
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Expires: 2000-05-02
Abstract
Abstract Stray light produced in a monochromator by the diffuse reflection of the incoming light beam specularly reflected from the surface of the diffraction grating is practically eliminated by interposing a black glass "absorbent-reflector" in the path of the specularly reflected beam. The small percentage of radiation that is not absorbed by the absorbing glass is reflected to an opposite blackened wall which diffuse reflects an extremely small percentage of the beam back to the absorbent-reflector where a very negligible part is returned to the grating surface and eventually to the monochromator exit slit.
Inventors
- 👤 Dieter Schiemann
- 👤 Wolfgang Witte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:16
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/0262; G01J3/12; G01J3/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
Attenuating means for the virtual elimination of stray light produces within grating monochromators by the diffuse reflection of zero order radiation specularly reflected from the surface of the grating, said attenuating means including: an absorbent-reflector positioned within the monochromator housing for intecepting the zero order radiation, said absorbent-reflector comprising a body of light beam radiation absorbent material having a highly reflective surface, said reflective surface being oriented for reflecting all radiation not absorbed by said material to a diffuse reflector in said housing.
Claim 2
Dependent Claim
83 words
Attenuating means for the virtual elimination of stray light produces within grating monochromators by the diffuse reflection of zero order radiation specularly reflected from the surface of the grating, said attenuating means including: an absorbent-reflector positioned within the monochromator housing for intecepting the zero order radiation, said absorbent-reflector comprising a body of light beam radiation absorbent material having a highly reflective surface, said reflective surface being oriented for reflecting all radiation not absorbed by said material to a diffuse reflector in said housing.
Claim 3
Dependent Claim
23 words
The attenuating means claimed in claim 1 wherein said absorbent-reflector is a black glass plate that absorbs radiation in the employed wavelength range.
References Cited (Backward Citations)
JPS54123085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |