GB1346766A – Colourimeters and fluorimeters
– Google Patents
GB1346766A – Colourimeters and fluorimeters
– Google Patents
Colourimeters and fluorimeters
Info
Publication number
GB1346766A
GB1346766A
GB1346766DA
GB1346766A
GB 1346766 A
GB1346766 A
GB 1346766A
GB 1346766D A
GB1346766D A
GB 1346766DA
GB 1346766 A
GB1346766 A
GB 1346766A
Authority
GB
United Kingdom
Prior art keywords
tube
filter
inverter
june
photo
Prior art date
1970-06-29
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
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
Priority date (The priority date 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 date listed.)
1970-06-29
Filing date
1970-06-29
Publication date
1974-02-13
1970-06-29
Application filed by Imperial Chemical Industries Ltd
filed
Critical
Imperial Chemical Industries Ltd
1974-02-13
Publication of GB1346766A
publication
Critical
patent/GB1346766A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
Abstract
1346766 Colorimeters and fluorimeters IMPERIAL CHEMICAL INDUSTRIES Ltd 22 June 1971 [29 June 1970 14 Dec 1970 2] 31323/70 59284/70 and 59285/70 Heading G1A In photo-metric apparatus, such as a colorimeter or fluorimeter, utilizing at least one fluorescent tube as light source, the flickering of the tube near its ends, an effect produced especially during the initial period after ignition, is controlled by supplying the tube with a high frequency alternating current. For colorimetry, miniature daylight tube 10 is switched on and illuminates sample aperture 12 via U.V.-absorbing filter 13. For fluorimetry, U.V. emitting tube 11 and U.V. transmitting filter 14 are used. An inverter 23 is provided to convert a D. C. power supply e.g. from an accumulator into the required (e.g. 1 to 100 kHz) A.C. The reflected light passes via condenser 15, filter drum 18 to photo-cell 17. The drum is provided with three tristimulus filters, and black U.V. transmitting and yellow U.V. abosrbing filters. Cadmium sulphide cells 21, 22 sense the intensities of lamps 10, 11 and compensate for slow changes in light level from the tubes. The whole apparatus in body portion A is connected by flexible cable and attachable by bayonet fittings to control and supply console (B), Fig. 1 (not shown), and may be turned to any required angle for application to a sample. The inverter may utilize transistors, electron tubes or thyristors. Suggested readout is a digital voltmeter.
GB1346766D
1970-06-29
1970-06-29
Colourimeters and fluorimeters
Expired
GB1346766A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3132370
1970-06-29
Publications (1)
Publication Number
Publication Date
GB1346766A
true
GB1346766A
(en)
1974-02-13
Family
ID=10321422
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1346766D
Expired
GB1346766A
(en)
1970-06-29
1970-06-29
Colourimeters and fluorimeters
Country Status (1)
Country
Link
GB
(1)
GB1346766A
(en)
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2337880A2
(en)
*
1975-11-07
1977-08-05
Sclavo Inst Sieroterapeut
PHOTOMETRIC APPARATUS FOR LABORATORY CHEMICO-CLINICAL ANALYSIS BY COLORIMETRIC AND KINETIC MEASUREMENTS WITH PRINTER AND OTHER COMPONENTS GROUPED IN TWO BODIES
US4285594A
(en)
*
1979-07-27
1981-08-25
Helena Laboratories Corporation
Optical system for densitometer
EP0293810A2
(en)
*
1987-06-02
1988-12-07
Optronik Gmbh Opto-Elektronische Systeme
Optical device for measuring the luminescence of surfaces or for measuring the color of brightened samples
DE4300723A1
(en)
*
1993-01-14
1994-07-21
Boehringer Mannheim Gmbh
Appts. for measurement of a component concentration in sample
US5748304A
(en)
*
1994-01-28
1998-05-05
Conrex Automation Oy
Measuring instrument for reflectometric measurements
1970
1970-06-29
GB
GB1346766D
patent/GB1346766A/en
not_active
Expired
Cited By (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2337880A2
(en)
*
1975-11-07
1977-08-05
Sclavo Inst Sieroterapeut
PHOTOMETRIC APPARATUS FOR LABORATORY CHEMICO-CLINICAL ANALYSIS BY COLORIMETRIC AND KINETIC MEASUREMENTS WITH PRINTER AND OTHER COMPONENTS GROUPED IN TWO BODIES
US4285594A
(en)
*
1979-07-27
1981-08-25
Helena Laboratories Corporation
Optical system for densitometer
EP0293810A2
(en)
*
1987-06-02
1988-12-07
Optronik Gmbh Opto-Elektronische Systeme
Optical device for measuring the luminescence of surfaces or for measuring the color of brightened samples
DE3718500A1
(en)
*
1987-06-02
1988-12-22
Optronik Gmbh Opto Elektronisc
OPTICAL DEVICE FOR MEASURING THE LUMINESCENT PART OF SURFACES
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
DE4300723A1
(en)
*
1993-01-14
1994-07-21
Boehringer Mannheim Gmbh
Appts. for measurement of a component concentration in sample
US5748304A
(en)
*
1994-01-28
1998-05-05
Conrex Automation Oy
Measuring instrument for reflectometric measurements
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Legal Events
Date
Code
Title
Description
1974-07-03
PS
Patent sealed
1978-01-25
PLNP
Patent lapsed through nonpayment of renewal fees
