GB882244A - Improvements in and relating to process control systems embodying polarimeters - Google Patents
Improvements in and relating to process control systems embodying polarimetersInfo
- Publication number
- GB882244A GB882244A GB3659056A GB3659056A GB882244A GB 882244 A GB882244 A GB 882244A GB 3659056 A GB3659056 A GB 3659056A GB 3659056 A GB3659056 A GB 3659056A GB 882244 A GB882244 A GB 882244A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- specimen
- photo
- plane
- faraday device
- 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
- 238000004886 process control Methods 0.000 title abstract 2
- 230000008033 biological extinction Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 238000011161 development Methods 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000010287 polarization Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 abstract 1
- 238000011160 research Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J4/00—Measuring polarisation of light
- G01J4/04—Polarimeters using electric detection means
-
- 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
- G01N21/21—Polarisation-affecting properties
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
882,244. Photo-electron analysis. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Nov. 29, 1957 [Nov. 29, 1956], No. 36590/56. Class 40(3). [Also in Group XX] A process control system uses a polarimeter in which the plane of polarization of a light beam is oscillated about the position for extinction, when no specimen is present, by using the Faraday effect, and the rotation produced by the specimen is evaluated from the component of light transmitted at the frequency of the oscillation and incident on a photo-cell, the signal from which is applied to the control of the process. As shown, monochromatic light from a lamp 1 and filter 6 is collimated by lenses 2 and 3 and plane polarised at 7 before passing through a Faraday device consisting of a transparent rod 8 surrounded by a wire coil 11, a specimen cell 23, and a similar Faraday device 24 to a crossed analyser 14 and thence to a photo-cell 16. The axial magnetic field in rod 8 due to the application of alternating current to coil 11 oscillates the plane of polarisation of the light beam about the extinction position, and the plane of polarisation is also rotated by the specimen in the test cell. The component of the photo-cell output having the frequency of the alternating current is filtered out and applied to an indicator and also to the control of a process involving the sample in cell 23. In order to find the rotary power of a solution which may flow through cell 23, a direct current is applied to the Faraday device 24 so as to produce a rotation of the plane of polarisation opposite to that introduced by the specimen and resistance is adjusted until indicator reads zero. Faraday device 24 may be omitted in which case a variable direct current may also be applied to the winding 11 for the same purpose. So that a constant watch may be kept on the specimen, the output from -a photo-multiplier may be fed back through a recorder to the Faraday device 24 (Fig. 8, not shown). The output signal from the photo-cell may also be used to provide automatic control of a processing plant from which is derived the solution which flows through cell 23.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3659056A GB882244A (en) | 1956-11-29 | 1956-11-29 | Improvements in and relating to process control systems embodying polarimeters |
| DEN14401A DE1117903B (en) | 1956-11-29 | 1957-11-28 | Optical polarization test device and optical polarization test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3659056A GB882244A (en) | 1956-11-29 | 1956-11-29 | Improvements in and relating to process control systems embodying polarimeters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB882244A true GB882244A (en) | 1961-11-15 |
Family
ID=10389519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3659056A Expired GB882244A (en) | 1956-11-29 | 1956-11-29 | Improvements in and relating to process control systems embodying polarimeters |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1117903B (en) |
| GB (1) | GB882244A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2197467A (en) * | 1986-10-24 | 1988-05-18 | David Murray Goodall | Optical apparatus and method for analysis of optically-active materials |
| EP0351659A2 (en) * | 1988-07-19 | 1990-01-24 | Siemens Aktiengesellschaft | Method and arrangement for measuring the concentration of optically active substances |
| EP3035034A1 (en) * | 2014-12-19 | 2016-06-22 | Leibniz - Institut für Analytische Wissenschaften - ISAS - E.V. | Assembly for the detection of reflection anisotropy |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2351539A (en) * | 1941-12-04 | 1944-06-13 | Spencer Lens Co | Polarimeter apparatus |
| US2503808A (en) * | 1948-02-03 | 1950-04-11 | Spreckels Sugar Company | Photoelectric automatically balancing polariscope |
| US2705903A (en) * | 1949-07-07 | 1955-04-12 | Fred R Marshall | Electro-optical shutters |
| US2766659A (en) * | 1950-12-11 | 1956-10-16 | Clevite Corp | Device for controlling light intensity |
| GB731922A (en) * | 1950-12-16 | 1955-06-15 | Goodyear Aircraft Corp | Light modulator |
| NL92837C (en) * | 1951-05-26 | |||
| BE512176A (en) * | 1951-06-18 |
-
1956
- 1956-11-29 GB GB3659056A patent/GB882244A/en not_active Expired
-
1957
- 1957-11-28 DE DEN14401A patent/DE1117903B/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2197467A (en) * | 1986-10-24 | 1988-05-18 | David Murray Goodall | Optical apparatus and method for analysis of optically-active materials |
| GB2197467B (en) * | 1986-10-24 | 1991-04-17 | David Murray Goodall | Optical apparatus and method |
| EP0351659A2 (en) * | 1988-07-19 | 1990-01-24 | Siemens Aktiengesellschaft | Method and arrangement for measuring the concentration of optically active substances |
| EP0351659A3 (en) * | 1988-07-19 | 1990-05-09 | Siemens Aktiengesellschaft | Method and arrangement for measuring the concentration of optically active substances |
| US4988199A (en) * | 1988-07-19 | 1991-01-29 | Siemens Aktiengesellschaft | Method and apparatus for measuring the concentration of optically active substances |
| EP3035034A1 (en) * | 2014-12-19 | 2016-06-22 | Leibniz - Institut für Analytische Wissenschaften - ISAS - E.V. | Assembly for the detection of reflection anisotropy |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1117903B (en) | 1961-11-23 |
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