US3753618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monochromator
Assignee: ULTRA VIOLET PRODUCTS Inc
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Filing: 1972-02-10
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Granted: 1973-08-21
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Expires: 1992-02-10
Abstract
Abstract A compact monochromator with entrance and exit slits nearly incident permitting insertion and removal of the monochromator at a focal point without requiring change in the system. A monochromator with entrance and exit slits each formed by an edge and a mirror. A monochromator with entrance slit and mirror directing the beam through an aperture in a grating to a collimating mirror, defining a light path from the entrance slit and mirror to the collimating mirror to the grating and back to the collimating mirror to the exit mirror and slit.
Inventors
- 👤 F Haley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:17
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/0205; G01J3/0243; G01J3/0256; G01J3/12; G01J3/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
217 words
In a monochromator for selecting a narrow band from an incoming light beam, the combination of: a housing; a concave mirror mounted in said housing; slit means mounted in said housing defining entrance and exit slits; and a grating mounted in said housing between said slit means and said concave mirror, said grating having an aperture for light passage between said slits and concave mirror; said slit means including spaceD first and second edges and first and second slit mirrors, with said first edge and slit mirror defining said entrance slit and with said second edge and slit mirror defining said exit slit, and means for positioning said first slit mirror for reflecting an incoming beam from said entrance slit to said concave mirror through said grating aperture, with said concave mirror reflecting the beam from said first slit mirror as a collimated beam to said grating and reflecting a return collimated beam from said grating to said second slit mirror through said grating aperture, and means for positioning said second slit mirror for reflecting the beam from said concave mirror through said exit slit, with said concave mirror including means defining a nonreflecting zone at the center thereof for preventing direct reflection from said entrance slit to said concave mirror and back to said exit slit.
Claim 2
Dependent Claim
217 words
In a monochromator for selecting a narrow band from an incoming light beam, the combination of: a housing; a concave mirror mounted in said housing; slit means mounted in said housing defining entrance and exit slits; and a grating mounted in said housing between said slit means and said concave mirror, said grating having an aperture for light passage between said slits and concave mirror; said slit means including spaceD first and second edges and first and second slit mirrors, with said first edge and slit mirror defining said entrance slit and with said second edge and slit mirror defining said exit slit, and means for positioning said first slit mirror for reflecting an incoming beam from said entrance slit to said concave mirror through said grating aperture, with said concave mirror reflecting the beam from said first slit mirror as a collimated beam to said grating and reflecting a return collimated beam from said grating to said second slit mirror through said grating aperture, and means for positioning said second slit mirror for reflecting the beam from said concave mirror through said exit slit, with said concave mirror including means defining a nonreflecting zone at the center thereof for preventing direct reflection from said entrance slit to said concave mirror and back to said exit slit.
Claim 3
Dependent Claim
46 words
A monochromator as defined in claim 1 including: a frame for holding said grating; pivot means for mounting said frame in said housing for pivoting about an axis parallel to said slits; and drive means carried by said housing for moving said grating on said axis.
Claim 4
Dependent Claim
115 words
A monochromator as defined in claim 2 wherein said drive means includes: mating threaded nut and shaft mounted on said housing, with rotation of said nut moving said shaft; a first rod sliding in a first passage in said housing with one end of said rod engageable with said frame and with the other end engageable with said shaft; a second rod sliding in a second passage in said housing with one end of said rod engageable with said frame; and a spring in said second passage and urging said second rod into engagement with said frame urging said frame into engagement with said first rod urging said first rod into engagement with said shaft.
Claim 5
Dependent Claim
73 words
A monochromator as defined in claim 2 wherein said drive means includes: first and second rings threadedly mounted on said housing, with said rings engageable with each other for locking on said housing and defining a zone between said rings; a shaft carried on said frame and projecting into said zone; and a spring carried on said housing and coupled to said shaft urging said shaft into engagement with one of said rings.
Claim 6
Dependent Claim
19 words
A monochromator as defined in claim 1 wherein said grating aperture is formed by a hole through the grating.
Claim 7
Dependent Claim
25 words
A monochromator as defined in claim 1 wherein said grating aperture is formed by two individual gratings spaced from each other with the aperture therebetween.
Claim 8
Dependent Claim
61 words
A monochromator as defined in claim 1 wherein said first and second edges are parallel and said first and second mirrors are mounted in a wedge form with the apex of said wedge positionable between said edges defining said first and second slits, with the beam path to said entrance slit in line with the beam path from said exit slit.
Claim 9
Dependent Claim
51 words
A monochromator as defined in claim 7 including a drive screw mounted on said housing in engagement with said wedge form slit mirrors for moving said slit mirrors toward and away from said edges for varying both slit widths and for removing said slit mirrors from said in line beam paths.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |