GB1379405A - Colourimeter and fluorimeter - Google Patents
Colourimeter and fluorimeterInfo
- Publication number
- GB1379405A GB1379405A GB4547471A GB4547471A GB1379405A GB 1379405 A GB1379405 A GB 1379405A GB 4547471 A GB4547471 A GB 4547471A GB 4547471 A GB4547471 A GB 4547471A GB 1379405 A GB1379405 A GB 1379405A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- filter wheel
- filters
- cell
- cells
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/251—Colorimeters; Construction thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
1379405 Photo-electric instruments IMPERIAL CHEMICAL INDUSTRIES Ltd 18 Sept 1972 [30 Sept 1971] 45474/71 Heading G1A A combined reflectance colorimeter and fluorimeter comprises two miniature fluorescent tubes as light and U.V. sources and a filter wheel in front of a photo-cell the output of which is compared with that of other photo-cells directly viewing small areas of the fluorescent tubes. As shown, Fig.2, the device utilizes a colour matching or artificial daylight fluorescent tube Tl and a U.V. fluorescent tube T2 surround by a cylinder of "black" glass which transmits U.V. radiation. Radiation reflected from or produced by fluorescence in the sample S is incident on a Se photo-cell P1 via a filter wheel W. Two reference photo-cells P2, P3 directly receive radiation emitted by the tubes Tl and T2 respectively. The reference photo-cells are connected in parallel to a potentiometer (H) arranged in a current balancing circuit with the cell P1, an electronic galvanometer (G) providing an out of balance indication which is nulled by adjustment of the potentiometer (H) which is suitably calibrated. Trimmer resistors (T4 to T7) are provided which are selectively switched into the circuit to compensate for differences in the transmissivity of the filters. The filter wheel may contain X, Y and Z tristimulus filters together with a U.V. transmissive filter. An enlarged filter wheel may contain in addition to the tristimulus filters nine spectral filters of selected wavelengths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4547471A GB1379405A (en) | 1971-09-30 | 1971-09-30 | Colourimeter and fluorimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4547471A GB1379405A (en) | 1971-09-30 | 1971-09-30 | Colourimeter and fluorimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1379405A true GB1379405A (en) | 1975-01-02 |
Family
ID=10437351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4547471A Expired GB1379405A (en) | 1971-09-30 | 1971-09-30 | Colourimeter and fluorimeter |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1379405A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4285594A (en) * | 1979-07-27 | 1981-08-25 | Helena Laboratories Corporation | Optical system for densitometer |
| EP0293810A3 (en) * | 1987-06-02 | 1989-10-25 | Optronik Gmbh Opto-Elektronische Systeme | Optical device for measuring the luminescence of surfaces or for measuring the color of brightened samples |
| US5748304A (en) * | 1994-01-28 | 1998-05-05 | Conrex Automation Oy | Measuring instrument for reflectometric measurements |
| EP1795111A4 (en) * | 2004-09-07 | 2009-02-25 | Olympus Corp | Removable filter unit and endoscope |
| CN1773254B (en) * | 2005-11-14 | 2010-08-25 | 白莉 | Selenium assaying liquid and colour comparision tube thereof |
-
1971
- 1971-09-30 GB GB4547471A patent/GB1379405A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4285594A (en) * | 1979-07-27 | 1981-08-25 | Helena Laboratories Corporation | Optical system for densitometer |
| EP0293810A3 (en) * | 1987-06-02 | 1989-10-25 | Optronik Gmbh Opto-Elektronische Systeme | Optical device for measuring the luminescence of surfaces or for measuring the color of brightened samples |
| US5748304A (en) * | 1994-01-28 | 1998-05-05 | Conrex Automation Oy | Measuring instrument for reflectometric measurements |
| EP1795111A4 (en) * | 2004-09-07 | 2009-02-25 | Olympus Corp | Removable filter unit and endoscope |
| CN1773254B (en) * | 2005-11-14 | 2010-08-25 | 白莉 | Selenium assaying liquid and colour comparision tube thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |