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公开(公告)号：GB2193313A
公开(公告)日：1988-02-03
申请号：GB8717161
申请日：1987-07-21
Applicant: GUIDED WAVE INC
Inventor： LEFEBRE DAVID A , SCHIRMER ROGER E
Abstract: Apparatus and method for measuring the absorbance of fluid samples. The length of the light path through the sample is adjusted to optimize the amount of light absorbed by the sample, and the absorbance of the sample is calculated from the length of the path and the amount of light absorbed. Accurate measurement of the absorbance of the fluid may be made by taking measurements at two different path lengths, since light level changes due to fouling of the optical windows or other slow changes in the optical train are independent of the path length, while that of the fluid varies proportionally with the path length. A preferred form of probe includes a cylindrical cell having an exposed variable path length sensing portion at one end and an actuator for varying the spacing at the other end, and a cylindrical cell insertion tube having seals and a large valve mechanism to permit removal of the probe without loss or escape of the fluid being measured.
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Patent Agency Ranking
公开(公告)号：WO1990007697A1
公开(公告)日：1990-07-12
申请号：PCT/US1989005826
申请日：1989-12-26
Applicant: GUIDED WAVE, INC.
Inventor： GUIDED WAVE, INC. , LEFEBRE, David, A.
IPC: G01J03/08
CPC classification number: G01J3/08 , G01J3/42 , G01J2001/182 , G01J2003/068 , G01N2201/04 , G01N2201/0833
Abstract: Spectrophotometric apparatus and methodology suitable for continuous and long-term use. The apparatus includes a monochromator (13) providing pre-dispersed monochromatic light to the optical inputs of a pair of fiber optic cables (34-37) and a translator (43) for alternatively positioning the fiber optic cables (34-37) at the same location with respect to the monochromator output. One of the cables (61) conducts light to a sample under study while the other cable (35b) provides a reference for light intensity measurements. The methodology includes the steps of performing two scans through the monochromator output for each measurement on the sample. The fiber optic cables are moved between scans so that the cable employed in the latter scan occupies the former position of the cable employed in prior scan.
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公开(公告)号：DE3724593A1
公开(公告)日：1988-02-04
申请号：DE3724593
申请日：1987-07-24
Applicant: GUIDED WAVE INC
Inventor： LEFEBRE DAVID A , SCHIRMER ROGER E
Abstract: Apparatus and method for measuring the absorbance of fluid samples. The length of the light path through the sample is adjusted to optimize the amount of light absorbed by the sample, and the absorbance of the sample is calculated from the length of the path and the amount of light absorbed. Accurate measurement of the absorbance of the fluid may be made by taking measurements at two different path lengths, since light level changes due to fouling of the optical windows or other slow changes in the optical train are independent of the path length, while that of the fluid varies proportionally with the path length. A preferred form of probe includes a cylindrical cell having an exposed variable path length sensing portion at one end and an actuator for varying the spacing at the other end, and a cylindrical cell insertion tube having seals and a large valve mechanism to permit removal of the probe without loss or escape of the fluid being measured.
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公开(公告)号：GB8717161D0
公开(公告)日：1987-08-26
申请号：GB8717161
申请日：1987-07-21
Applicant: GUIDED WAVE INC
Abstract: Apparatus and method for measuring the absorbance of fluid samples. The length of the light path through the sample is adjusted to optimize the amount of light absorbed by the sample, and the absorbance of the sample is calculated from the length of the path and the amount of light absorbed. Accurate measurement of the absorbance of the fluid may be made by taking measurements at two different path lengths, since light level changes due to fouling of the optical windows or other slow changes in the optical train are independent of the path length, while that of the fluid varies proportionally with the path length. A preferred form of probe includes a cylindrical cell having an exposed variable path length sensing portion at one end and an actuator for varying the spacing at the other end, and a cylindrical cell insertion tube having seals and a large valve mechanism to permit removal of the probe without loss or escape of the fluid being measured.
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公开(公告)号：EP0452403A4
公开(公告)日：1992-06-17
申请号：EP90902079
申请日：1989-12-26
Applicant: GUIDED WAVE, INC.
Inventor： LEFEBRE, DAVID, A.
CPC classification number: G01J3/08 , G01J3/42 , G01J2001/182 , G01J2003/068 , G01N2201/04 , G01N2201/0833
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公开(公告)号：EP0452403A1
公开(公告)日：1991-10-23
申请号：EP90902079.0
申请日：1989-12-26
Applicant: GUIDED WAVE, INC.
Inventor： LEFEBRE, David, A.
CPC classification number: G01J3/08 , G01J3/42 , G01J2001/182 , G01J2003/068 , G01N2201/04 , G01N2201/0833
Abstract: Procédé et appareil spectrophotométrique approprié à une utilisation continue et à long terme. L'appareil comprend un monochromateur (13) envoyant une lumière monochromatique prédispersée aux entrées optiques d'une paire de câbles à fibre optique (34-37) et un dispositif de translation (43) pour positionner alternativement les câbles à fibre optique (34-37) au même emplacement par rapport à la sortie du monochromateur. L'un des câbles (61) conduit la lumière vers un échantillon à analyser tandis que l'autre câble (35b) établit une référence pour des mesures d'intensité de lumière. La méthode consiste à effectuer deux balayages avec la sortie du monochromateur pour chaque mesure sur l'échantillon. Les câbles à fibre optique sont déplacés entre les balayages de sorte que le câble utilisé dans le dernier balayage occupe la première position du câble utilisé dans le balayage antérieur.
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