US4022531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monochromator
Assignee: US Philips Corp
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Filing: 1975-12-04
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Granted: 1977-05-10
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Expires: 1995-12-04
Abstract
Abstract A monochromator provided with a plurality of entrance windows for beams of white light emitted by respective lamps which are alternately operated. The internal optics of the monochromator consist of a dispersing system disposed so that each of the beams of white light is intercepted and converted into dispersed light which is composed of discrete monochromatic light beams of different wavelengths. The monochromator has an exit window with a slit of predetermined dimensions so as to transmit only one wavelength at a time.
Inventors
- 👤 Svelto Orazio
- 👤 Cubeddu Rinaldo
- 👤 Zagara Federico
- 👤 Mengarelli Quirino
- 👤 Riccardi Clemente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:35
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/255; G01J; G01J3/00; G01J3/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
248 words
Monochromator, comprising a plurality of white-light producing lamps having substantially the same frequency range, a box-shaped casing which is provided with a plurality of spatially separated entrance windows for beams of white light which each are emitted by one of said lamps, electronic means for selectively switching each lamp on, the casing further containing a dispersing means disposed internally of the casing so that each of the said beams of white light is incident on the dispersing means for converting said beams into dispersed light in the form of separate beams of monochromatic light of various wavelengths, a beam splitter aligned with the path of the beams from the entrance windows and aligned with the dispersing means for directing the beams from each of the entrance windows to the dispersing means along diverging light paths, the casing being further provided with an exit window provided with a slit which is proportioned so that only one of the said beams of monochromatic light is transmitted, means being provided to direct the white light to the dispersing means at a particular angle of incidence so that dispersed light is obtained which is composed of beams of monochromatic light which are inclined to light beams of the same wavelength which are emitted by another lamp so that the identity and hence the wavelength of the selected beams of monochromatic light which emerge from the exit slit are varied in accordance with the identity of the particular lamp which is switched on.
Claim 2
Dependent Claim
248 words
Monochromator, comprising a plurality of white-light producing lamps having substantially the same frequency range, a box-shaped casing which is provided with a plurality of spatially separated entrance windows for beams of white light which each are emitted by one of said lamps, electronic means for selectively switching each lamp on, the casing further containing a dispersing means disposed internally of the casing so that each of the said beams of white light is incident on the dispersing means for converting said beams into dispersed light in the form of separate beams of monochromatic light of various wavelengths, a beam splitter aligned with the path of the beams from the entrance windows and aligned with the dispersing means for directing the beams from each of the entrance windows to the dispersing means along diverging light paths, the casing being further provided with an exit window provided with a slit which is proportioned so that only one of the said beams of monochromatic light is transmitted, means being provided to direct the white light to the dispersing means at a particular angle of incidence so that dispersed light is obtained which is composed of beams of monochromatic light which are inclined to light beams of the same wavelength which are emitted by another lamp so that the identity and hence the wavelength of the selected beams of monochromatic light which emerge from the exit slit are varied in accordance with the identity of the particular lamp which is switched on.
Claim 3
Dependent Claim
26 words
Monochromator as claimed in claim 1, wherein each entrance window is provided with a suitably proportioned selection slit for transmitting a sufficient amount of luminous energy.
Claim 4
Dependent Claim
33 words
Monochromator as claimed in claim 1 wherein each entrance window is provided with an entrance slit, and means for varying the position of the said entrance slit relative to the relevant entrance window.
Claim 5
Dependent Claim
29 words
Monochromater as claimed in claim 1, wherein each entrance window is provided with an entrance selection slit and means for varying the dimensions of the said entrance selection slit.
Claim 6
Dependent Claim
13 words
Monochromator as claimed in claim 1, wherein said dispersing means comprises a prism.
Claim 7
Dependent Claim
22 words
Monochromator as claimed in claim 1 further provided with a spectrophotometer in the path of the beam passing from said exit window.
References Cited (Backward Citations)
US2879393A
Cited
US3218914A
Cited
US3279308A
Cited
US3521960A
Cited
US3522739A
Cited
US3554649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |