GB785563A - Refractometer - Google Patents
RefractometerInfo
- Publication number
- GB785563A GB785563A GB21719/55A GB2171955A GB785563A GB 785563 A GB785563 A GB 785563A GB 21719/55 A GB21719/55 A GB 21719/55A GB 2171955 A GB2171955 A GB 2171955A GB 785563 A GB785563 A GB 785563A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- prism
- mirror
- beams
- mirrors
- 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
- G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
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
785,563. Photo-electric control arrangements. ZEISS-STIFTUNG, C., [trading as ZEISS, C., [Firm of]]. July 27, 1955 [Aug. 10, 1954], No. 21719/55. Class 40 (3). [Also in Group XX] A critical angle refractometer comprises means for dividing light from a source into two beams of equal intensity one of which is focused upon the hypotenuse surface of a measuring prism which borders on the substance whose refractive index is to be measured and the other acts as a comparison beam, the two beams being directed to a photo-cell, a rotatable mirror being provided to direct light of different inclinations from the measuring prism on to the photo-cell, a balance being produced at an inclination of the mirror corresponding to the critical angle between the prism and the medium. As shown, light from the source 1 is directed by two mirrors 4, 4<SP>1</SP> to form two beams, that from the mirror 4 being concentrated by a lens 5 on the entrance surface of a prism 2 whose hypotenuse surface borders on a cell 3 containing the substance, e.g. a liquid, the refractive index of which is to be measured, light reflected from this surface being directed by an angularly adjustable mirror 6 to a telescope diaphragm 8. The beam from the mirror 41 is focused by a lens 5<SP>1</SP> on to a prism 2<SP>1</SP> similar to the prism 2 after passage through a movable optical wedge 18 and is re- . fleeted by an adjustable mirror 6<SP>1</SP> to a telescope diaphragm 8<SP>1</SP>. Light from these diaphragms is directed to a photo-cell 11 by lenses 12, 12<SP>1</SP> and mirrors, the beams being alternately interrupted by a rotating shutter 10. Current from the cell 11 is amplified at 13 and fed to an induction motor 14 which rotates the mirrors 6, 6<SP>1</SP> simultaneously and operates a recording pen 16. The motor 14 runs until the mirrors 6, 6<SP>1</SP> reach such a position that the two beams therefrom are of equal intensity when no alternating current is generated by the cell 11 and the motor stops, at which the angular position the mirror 6 corresponds to the critical angle of the surface bordering the prism 2 and the cell 3.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE785563X | 1954-08-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB785563A true GB785563A (en) | 1957-10-30 |
Family
ID=6698804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21719/55A Expired GB785563A (en) | 1954-08-10 | 1955-07-27 | Refractometer |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB785563A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2174806A (en) * | 1985-05-10 | 1986-11-12 | Electro Tec Corp | Refractometer apparatus |
FR2626075A1 (en) * | 1988-01-14 | 1989-07-21 | Biasoli Gilbert | Method and apparatus for continuously determining by refractometry the concentration of a soluble material in a liquid solution |
-
1955
- 1955-07-27 GB GB21719/55A patent/GB785563A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2174806A (en) * | 1985-05-10 | 1986-11-12 | Electro Tec Corp | Refractometer apparatus |
US4692024A (en) * | 1985-05-10 | 1987-09-08 | Electro-Tec Corporation | Automatic refractometer |
FR2626075A1 (en) * | 1988-01-14 | 1989-07-21 | Biasoli Gilbert | Method and apparatus for continuously determining by refractometry the concentration of a soluble material in a liquid solution |
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