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Patent EP0285170A2 successfully refreshed from Google Patents.
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EP0285170A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Fluorescence analyzer

Assignee: Ajinomoto Co Inc
•
Filing: 1988-03-31
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Granted: —
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Expires: 2008-03-31
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Abstract

Abstract A fluorescent analyzer including a light source (1) which irradiates a sample with direct light, a first wave selector (2) for passing a predetermined wavelength of light emitted from the light source, a sample cell (3) for holding the sample which is irradiated by light passed by the first wave selector, a second wave selector (4) arranged sidewards of the sample outside a direct path of light from the light source passing straight through the sample for passing light of a second predetermined wavelength emitted from the sample upon irradiation by direct light from the light source, a first light detector (5) for producing a first output signal indicative of the amount of light of the second predetermined wavelength passed by the second wave selector, a second light detector (7) for producing a second output signal indicative of the amount of direct light of the first predetermined wavelength passing straight through the sample, a correction circuit (9) for performing a predetermined correction on the amplitude of the first output signal based on the amplitude of the second output signal to produce a corrected measurement signal, and an indicator for indicating the corrected measurement signal.

Inventors

  • 👤 Harufumi Miwa
  • 👤 Minoru Kashiwada
  • 👤 Ikuo Goto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 11:53
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/645; G01N2021/6417; G01N2021/6421

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 193 words
A fluorescent analyzer comprising: a light source adapted to irradiate a sample with direct light; a first wave selector for passing a first predetermined wavelength of light emitted from the light source in a direct path to said sample; a sample cell for holding said sample in said direct light path; a second wave selector arranged sidewards of said sample cell outside said direct path of light from said first wave selector, said second wave selector passing light of a second predetermined wavelength emitted from the sample upon irradiation by direct light passed by said first wave selector; a first light detector for producing a first output signal indicative of the amount of light of said second predetermined wavelength passed by said second wave selector; a second light detector for producing a second output signal indicative of the amount of direct light of said first predetermined wavelength passing straight through the sample; a correction circuit for performing a predetermined correction of the amplitude of the first output signal based on the amplitude of the second output signal to produce a correction measurement signal; and an indication means for indicating the corrected measurement signal.
Claim 2
Dependent Claim 193 words
A fluorescent analyzer comprising: a light source adapted to irradiate a sample with direct light; a first wave selector for passing a first predetermined wavelength of light emitted from the light source in a direct path to said sample; a sample cell for holding said sample in said direct light path; a second wave selector arranged sidewards of said sample cell outside said direct path of light from said first wave selector, said second wave selector passing light of a second predetermined wavelength emitted from the sample upon irradiation by direct light passed by said first wave selector; a first light detector for producing a first output signal indicative of the amount of light of said second predetermined wavelength passed by said second wave selector; a second light detector for producing a second output signal indicative of the amount of direct light of said first predetermined wavelength passing straight through the sample; a correction circuit for performing a predetermined correction of the amplitude of the first output signal based on the amplitude of the second output signal to produce a correction measurement signal; and an indication means for indicating the corrected measurement signal.
Claim 3
Dependent Claim 72 words
The fluorescent analyzer according to Claim 1, wherein said correction circuit performs said correction based on the following relationship: X S ʹ = X s - [k(Y s - Y₁], where X s ʹ = the corrected measurement signal, X s = the first output signal obtained from the sample, Y s = the second output signal obtained from the sample, Y₁ = a predetermined constant, and k = a predetermined constant.

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