GB985428A - Improvements in or relating to apparatus for measuring the dielectric constant of a layer of material such as a film or sheet - Google Patents
Improvements in or relating to apparatus for measuring the dielectric constant of a layer of material such as a film or sheetInfo
- Publication number
- GB985428A GB985428A GB4295560A GB4295560A GB985428A GB 985428 A GB985428 A GB 985428A GB 4295560 A GB4295560 A GB 4295560A GB 4295560 A GB4295560 A GB 4295560A GB 985428 A GB985428 A GB 985428A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- dielectric constant
- probe
- thickness
- capacitance
- 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
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
- G01R27/2635—Sample holders, electrodes or excitation arrangements, e.g. sensors or measuring cells
- G01R27/2641—Sample holders, electrodes or excitation arrangements, e.g. sensors or measuring cells of plate type, i.e. with the sample sandwiched in the middle
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
985, 428. Measuring electrically; capacitance measurements. WAYNE KERR LABORATORIES Ltd., and R. CALVERT. Dec. 5, 1961 [Dec. 14, 1960], No. 42955/60. Headings G1N and G1U. Two mechanically coupled capacitive probes 14,15 (Fig. 1), having electrodes of the same surface area, are applied to determine the thickness and dielectric constant of a layer of material 10 in close contact with a support surface 11, probe 15 and support 11 producing a signal proportional to the thickness of the layer, which is applied to probe 14 and support 11 to determine its dielectric constant. Guard electrodes 16, 17 are provided, connected to the outer conductors of coaxial cables 18, 19. The capacitance between probe 15 and plate 11 is connected in the feedback path of a high gain amplifier 20 (Fig. 2) fed from a constant A.C. source 21, and a meter 22 across the output indicates the thickness of the layer 10. The output is fed to a second high gain amplifier 25 through the capacitance between probe 14 and plate 11, and a meter 28 in its feedback path indicates the dielectric constant of the layer 10, which is also indicative of the moisture content, or larger proportion of the material 10 comprises two layers of known differing dielectric constants.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4295560A GB985428A (en) | 1960-12-14 | 1960-12-14 | Improvements in or relating to apparatus for measuring the dielectric constant of a layer of material such as a film or sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4295560A GB985428A (en) | 1960-12-14 | 1960-12-14 | Improvements in or relating to apparatus for measuring the dielectric constant of a layer of material such as a film or sheet |
Publications (1)
Publication Number | Publication Date |
---|---|
GB985428A true GB985428A (en) | 1965-03-10 |
Family
ID=10426696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4295560A Expired GB985428A (en) | 1960-12-14 | 1960-12-14 | Improvements in or relating to apparatus for measuring the dielectric constant of a layer of material such as a film or sheet |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB985428A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3714561A (en) * | 1970-11-24 | 1973-01-30 | Us Air Force | A transducer for measuring the displacement of an electrically conductive objective |
US4454469A (en) * | 1977-07-14 | 1984-06-12 | U.S. Philips Corporation | Measurement of variations in the distance between a color selection electrode and a display window of a color display tube |
US4565966A (en) * | 1983-03-07 | 1986-01-21 | Kollmorgen Technologies Corporation | Method and apparatus for testing of electrical interconnection networks |
EP0558972A2 (en) * | 1992-03-04 | 1993-09-08 | The Perkin-Elmer Corporation | Differential dielectric analyzer |
-
1960
- 1960-12-14 GB GB4295560A patent/GB985428A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3714561A (en) * | 1970-11-24 | 1973-01-30 | Us Air Force | A transducer for measuring the displacement of an electrically conductive objective |
US4454469A (en) * | 1977-07-14 | 1984-06-12 | U.S. Philips Corporation | Measurement of variations in the distance between a color selection electrode and a display window of a color display tube |
US4565966A (en) * | 1983-03-07 | 1986-01-21 | Kollmorgen Technologies Corporation | Method and apparatus for testing of electrical interconnection networks |
EP0558972A2 (en) * | 1992-03-04 | 1993-09-08 | The Perkin-Elmer Corporation | Differential dielectric analyzer |
EP0558972A3 (en) * | 1992-03-04 | 1994-03-23 | Perkin Elmer Corp |
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