US4820045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equipment for the emission and distribution of light by optical fibers, particularly for in-line spectrophotometric control with the aid of a double beam spectrophotometer
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1985-09-03
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Granted: 1989-04-11
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Expires: 2005-09-03
Abstract
Abstract Equipment for the emission and distribution of light by optical fibres, particularly for in-line spectrophotometric control with the aid of a double beam spectrophotometer, namely one channel for the reference and one channel for the measurement. It has at least one complementary light source emitting through a system of optical fibres permanently towards a reference cell and sequentially towards one of the n measuring cells corresponding to the controls to be performed, the light information from the reference cell on the one hand and sequentially from each of the n measuring cells on the other being passed by the system of optical fibres respectively to the reference channel and to the measuring channel of the spectrophotometer.
Inventors
- 👤 Gilbert Boisde
- 👤 Michel Quanquin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/35; G02B6/3586; G02B6/359; F; F21; F21V; F21V19/00; F21V19/04; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/251; G01N21/253; G02B6/351; G02B6/3512; G02B6/352; G01N2201/00; G01N2201/08; G02B6/354; G02B6/3544; G02B6/3546; G02B6/3548; G02B6/355; G02B6/3564; G02B6/3582
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A device for the emission and distribution of light by optical fibres, particularly for in-line spectrophotometric control, to be used in conjunction with a double beam spectrophotometer having one channel for the reference and one channel for the measurement, an internal emitting light source, a monochromator, a compartment having optical probes and a light detector, said device comprising: at least one complementary light source emitting through a series of optical fibres; means for passing light through one of said series of optical fibres permanently towards a reference cell; means for passing light through at least one of the remaining series of optical fibres sequentially towards each of n measuring cells; and means including said series of optical fibres for passing light information from the reference cell and sequentially from each of the n measuring cells, respectively, to the reference channel and the measuring channel of the spectrophotometer.
Claim 2
Independent Claim
147 words
A device for the emission and distribution of light by optical fibres, particularly for in-line spectrophotometric control, to be used in conjunction with a double beam spectrophotometer having one channel for the reference and one channel for the measurement, an internal emitting light source, a monochromator, a compartment having optical probes and a light detector, said device comprising: at least one complementary light source emitting through a series of optical fibres; means for passing light through one of said series of optical fibres permanently towards a reference cell; means for passing light through at least one of the remaining series of optical fibres sequentially towards each of n measuring cells; and means including said series of optical fibres for passing light information from the reference cell and sequentially from each of the n measuring cells, respectively, to the reference channel and the measuring channel of the spectrophotometer.
Claim 3
Dependent Claim
160 words
A device according to claim 1, wherein said optical fibre means for passing light includes: a drum or barrel-type rotary system having n fixed exits in which said complementary light source includes an electric light bulb emitting in one direction towards a fixed exit constituting the reference channel which supplies the reference cell by means of one of said series of optical fibres, and in the opposite direction across a set of two mirrors fixed at 90° to one another, said mirrors being rotated by a stepping motor, and situated so the light strikes said first mirror at a 45° angle thereby directing the light onto the second mirror and sequentially towards each of said n fixed exits constituting the measuring channels which supply each of said n measuring cells by means of the remaining optical fibres of said series of optical fibres with one optical fibre passing from each measuring channel to each of said n measuring cells, respectively.
Claim 4
Dependent Claim
118 words
A device according to claim 2, wherein said means for passing light information from each of the n measuring cells includes; a second drum or rotary system, which does not have a light source and which has a set of mirrors coupled in rotation with said set of mirrors in said first drum or barrel-type rotary systems, the light traveling in opposite directions in each of the two systems; n light access channels used to receive said light information from each of said n measuring cells respectively by means of said series of optical fibres; and and at least one additional light access channel used to pass the received light information to the measuring channel of the spectrophotometer.
Claim 5
Dependent Claim
58 words
A device according to claim 2, and further comprising: a second substantially identical drum or barrel-type rotary system provided with a light source; a series of n+1 switching means connected to said series of optical fibres, and means for substituting one light source for the other upon the failure of either via said series of n+1 switching means.
References Cited (Backward Citations)
US3697185A
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FR2339166A1
Cited
EP0015170A1
Cited
EP0062160A1
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |