GB540876A - Improvements in or relating to polariscopes - Google Patents
Improvements in or relating to polariscopesInfo
- Publication number
- GB540876A GB540876A GB1690039A GB1690039A GB540876A GB 540876 A GB540876 A GB 540876A GB 1690039 A GB1690039 A GB 1690039A GB 1690039 A GB1690039 A GB 1690039A GB 540876 A GB540876 A GB 540876A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parts
- polarizer
- analyzer
- amplifier
- divided
- 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
- 238000010276 construction Methods 0.000 abstract 2
- 230000010287 polarization Effects 0.000 abstract 2
- 238000005259 measurement Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
540,876. Polariscopes &c. PARNUM, D. H., and AITKEN, I. M. E. June 9, 1939, Nos. 16900 and 20988. [Class 97 (i)] In a polariscope, polarimeter &c. the light beam is divided into two parts passing separately through polarizers having a wide angle, for example 90 degrees, between their planes of polarization, and alternate impulses from the two beams are applied to a photo-electric cell or other light sensitive device for end point determination ; an amplifier may be interposed between the light sensitive device receiving the outputs and the indicating &c. instruments. Fig. 1 shows a construction using a lamp S fed with direct current, and having a rotating slotted disc D at any position between the lamp and analyzer A, but preferably before the polarizer P. The polarizer P may comprise two elements arranged to divide the beam into parts and polarizing them in perpendicular planes, and the disc D may have two rings of slots passing the parts alternately. The analyzer A may be rotatable in association with a divided circle C for measurement, or quartz wedges, respectively fixed and slidable across the beam, may be used ; the output may be received by a photo-electric cell PC, the current from which is amplified by an amplifier 13 and applied to an indicating instrument I. The positions in the beam of the polarizer P and analyzer A, with their associated parts, may be interchanged. Fig. 5 shows a construction wherein polarization of the parts of the beam is effected by two separated nicols N 1 , N 2 , the beam being divided and re-directed to the tube T by mirrors M 1 ...M 4 , and the parts being alternately passed by a rotating slotted disc D. The circuits of the amplifier 13 may be tuned for the frequency of light variation, and may, by known methods, produce greater sensitivity of indication as the zero or minimum reading is approached. The indicator I may be replaced by a recorder, or by a signalling or control device. Specification 456,286 is referred to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1690039A GB540876A (en) | 1939-06-09 | 1939-06-09 | Improvements in or relating to polariscopes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1690039A GB540876A (en) | 1939-06-09 | 1939-06-09 | Improvements in or relating to polariscopes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB540876A true GB540876A (en) | 1941-11-04 |
Family
ID=10085703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1690039A Expired GB540876A (en) | 1939-06-09 | 1939-06-09 | Improvements in or relating to polariscopes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB540876A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2503808A (en) * | 1948-02-03 | 1950-04-11 | Spreckels Sugar Company | Photoelectric automatically balancing polariscope |
| US2829555A (en) * | 1951-08-06 | 1958-04-08 | Albert S Keston | Polarimetric method and apparatus |
| US2974561A (en) * | 1956-12-20 | 1961-03-14 | Research Corp | Polarimeter |
| US2986066A (en) * | 1957-10-15 | 1961-05-30 | Daystrom Inc | Polarimetric apparatus |
| US2993402A (en) * | 1956-08-03 | 1961-07-25 | Libbey Owens Ford Glass Co | Measuring of materials by use of polarized light |
| US2999418A (en) * | 1958-03-31 | 1961-09-12 | Albert S Keston | Polarimetric apparatus |
| US3001439A (en) * | 1957-10-15 | 1961-09-26 | Daystrom Inc | Apparatus and method for polarimetric analysis |
| DE1121835B (en) * | 1957-10-15 | 1962-01-11 | Daystrom Inc | Polarimeter arrangement with modulation of the light beam penetrating the substance to be examined |
| US3031919A (en) * | 1959-12-09 | 1962-05-01 | Barnes Eng Co | Visual monitoring device |
| US3041921A (en) * | 1958-11-17 | 1962-07-03 | Beckman Instruments Inc | Polarimeter apparatus |
| US3283644A (en) * | 1962-11-27 | 1966-11-08 | Du Pont | Apparatus for determining the concentration of dispersed particulate solids in liquids |
-
1939
- 1939-06-09 GB GB1690039A patent/GB540876A/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2503808A (en) * | 1948-02-03 | 1950-04-11 | Spreckels Sugar Company | Photoelectric automatically balancing polariscope |
| US2829555A (en) * | 1951-08-06 | 1958-04-08 | Albert S Keston | Polarimetric method and apparatus |
| US2993402A (en) * | 1956-08-03 | 1961-07-25 | Libbey Owens Ford Glass Co | Measuring of materials by use of polarized light |
| US2974561A (en) * | 1956-12-20 | 1961-03-14 | Research Corp | Polarimeter |
| US2986066A (en) * | 1957-10-15 | 1961-05-30 | Daystrom Inc | Polarimetric apparatus |
| US3001439A (en) * | 1957-10-15 | 1961-09-26 | Daystrom Inc | Apparatus and method for polarimetric analysis |
| DE1121835B (en) * | 1957-10-15 | 1962-01-11 | Daystrom Inc | Polarimeter arrangement with modulation of the light beam penetrating the substance to be examined |
| US2999418A (en) * | 1958-03-31 | 1961-09-12 | Albert S Keston | Polarimetric apparatus |
| US3041921A (en) * | 1958-11-17 | 1962-07-03 | Beckman Instruments Inc | Polarimeter apparatus |
| US3031919A (en) * | 1959-12-09 | 1962-05-01 | Barnes Eng Co | Visual monitoring device |
| US3283644A (en) * | 1962-11-27 | 1966-11-08 | Du Pont | Apparatus for determining the concentration of dispersed particulate solids in liquids |
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