GB951473A - Differential refractometer - Google Patents
Differential refractometerInfo
- Publication number
- GB951473A GB951473A GB2520661A GB2520661A GB951473A GB 951473 A GB951473 A GB 951473A GB 2520661 A GB2520661 A GB 2520661A GB 2520661 A GB2520661 A GB 2520661A GB 951473 A GB951473 A GB 951473A
- Authority
- GB
- United Kingdom
- Prior art keywords
- refracting member
- block
- sample liquid
- light source
- light
- 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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/4133—Refractometers, e.g. differential
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
951,473. Differential refractometers. J.L.L. WATERS. July 12,1961 [July 22, 1960], No. 25206/61. Heading G1A. A differential refractometer comprises a light source 10, Fig. 1, a refracting member 18 arranged to contain a reference liquid within a prism 24, and a surrounding sample liquid 28, the index of refraction of which is to be compared with that of the reference liquid, optical means 12, 14, 16, 30 arranged to pass a beam from the light source through the refracting member on to a beam bifurcating device 38, a detector arranged to receive the bifurcated beam portions on two separate sections 40, 42 of photo conductive light sensitive surface, possibly cadmium sulphide, having a sensitivity to radiation such that the resistance of each surface drops to less than 8 megohms when a square thereof, not greater than 3/64 inch on a side is illuminated by two foot candles, and operable means 44 for determining the relative magnitude of the beam portions received by the two photo sensitive sections. The means 44, may comprise an A. C. resistance bridge having the cadmium sulphide detectors in adjacent arms thereof, connected to an amplifier 46, feeding one phase of a two phase induction motor 48, mechanically connected to a rotatable glass block 34 laterally deflecting the beam of light to counteract any deflection of the beam by the refracting member, so that with the sample liquid in continuous flow through the refracting member the block 34 rotates, in response to the amplifier output so that the two detector portions receive equal parts of the light beam, the position of the motor rotor giving an indication of the sample liquid's refractive index on meter 52 and recorder 54. Alternatively, the motor, meter and recorder may be replaced by manual turning means and revolution counters respectively; The refractometer may be incorporated in continuous flow apparatus comprising a first block 58, Fig. 3, containing the light source and slits assembly, and the beam bifurcating mirror and detectors assembly mounted one above the other and a second block 60 housing the refracting member 18, mirror 30 and collimating lens 16, the two blocks, together with glass blocks 32, 34 and the induction motor 48 with its associated gearing, being mounted on a support 56, a third block 62 surrounding a steel pipe carrying the sample liquid up to the refracting member being carried under the support. All three blocks and support are of massive aluminium construction to minimise the effects of change in ambient temperature, a thermistor controlled heater also being included.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4474560A | 1960-07-22 | 1960-07-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB951473A true GB951473A (en) | 1964-03-04 |
Family
ID=21934095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2520661A Expired GB951473A (en) | 1960-07-22 | 1961-07-12 | Differential refractometer |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB951473A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1126270A2 (en) * | 2000-02-19 | 2001-08-22 | Nanolit GmbH | Refraction index detector for capillary electrophoresis |
CN102788767A (en) * | 2012-08-24 | 2012-11-21 | 中国科学院光电技术研究所 | Device for measuring material refractive index temperature coefficient under low temperature based on minimum deviation angle method |
CN113959950A (en) * | 2021-10-28 | 2022-01-21 | 绍兴泊盛科技有限公司 | Detection apparatus for detect liquid refracting index based on light stream accuse chip |
-
1961
- 1961-07-12 GB GB2520661A patent/GB951473A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1126270A2 (en) * | 2000-02-19 | 2001-08-22 | Nanolit GmbH | Refraction index detector for capillary electrophoresis |
EP1126270A3 (en) * | 2000-02-19 | 2002-10-02 | Nanolit GmbH | Refraction index detector for capillary electrophoresis |
CN102788767A (en) * | 2012-08-24 | 2012-11-21 | 中国科学院光电技术研究所 | Device for measuring material refractive index temperature coefficient under low temperature based on minimum deviation angle method |
CN113959950A (en) * | 2021-10-28 | 2022-01-21 | 绍兴泊盛科技有限公司 | Detection apparatus for detect liquid refracting index based on light stream accuse chip |
CN113959950B (en) * | 2021-10-28 | 2024-04-12 | 绍兴泊盛科技有限公司 | Detection device for detecting liquid refractive index based on optofluidic chip |
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