GB655655A - Optical systems for measuring the thickness of transparent sheet materials - Google Patents
Optical systems for measuring the thickness of transparent sheet materialsInfo
- Publication number
- GB655655A GB655655A GB33663/48A GB3366348A GB655655A GB 655655 A GB655655 A GB 655655A GB 33663/48 A GB33663/48 A GB 33663/48A GB 3366348 A GB3366348 A GB 3366348A GB 655655 A GB655655 A GB 655655A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wedge
- thickness
- optical
- transparent sheet
- sheet
- 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
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0691—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of objects while moving
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
655,655. Optical apparatus for gauging dimensions. BRITISH CELANESE, Ltd. Dec. 31, 1948, No. 33663. Convention date, Jan. 7. [Class 106 (ii)] [Also in Group XX] The thickness of a transparent sheet 10, Fig. 1, is measured by an optical wedge 13 receiving light R reflected from the sheet 10, the optical thickness of the wedge varying over a range that includes the optical thickness of the transparent sheet so that an interference pattern may be observed near the point where the optical thickness of the wedge is equal to the optical thickness of the sheet. A scale 13 may be attached to the wedge so that thicknesses may be indicated directly by the position of the interference pattern. The wedge, Fig. 3, may comprise a pair of optical flats 14, 15 disposed at an angle to each other to provide an air or liquid wedge between them, the lower face 23 of flat 14 having a partly mirrored surface and the upper face 24 of flat 15 having a fully mirrored surface. Alternatively the wedge may be of glass with its upper surface partly mirrored and its lower surface fully mirrored.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US655655XA | 1948-01-07 | 1948-01-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB655655A true GB655655A (en) | 1951-07-25 |
Family
ID=22063592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33663/48A Expired GB655655A (en) | 1948-01-07 | 1948-12-31 | Optical systems for measuring the thickness of transparent sheet materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB655655A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0189482A1 (en) * | 1984-05-31 | 1986-08-06 | Matsushita Electric Industrial Co., Ltd. | Shape evaluating apparatus |
| EP0227253A1 (en) * | 1985-11-05 | 1987-07-01 | Imperial Chemical Industries Plc | Decoding apparatus |
-
1948
- 1948-12-31 GB GB33663/48A patent/GB655655A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0189482A1 (en) * | 1984-05-31 | 1986-08-06 | Matsushita Electric Industrial Co., Ltd. | Shape evaluating apparatus |
| EP0189482A4 (en) * | 1984-05-31 | 1988-09-07 | Matsushita Electric Ind Co Ltd | Shape evaluating apparatus. |
| EP0227253A1 (en) * | 1985-11-05 | 1987-07-01 | Imperial Chemical Industries Plc | Decoding apparatus |
| AU590019B2 (en) * | 1985-11-05 | 1989-10-26 | Imperial Chemical Industries Plc | Decoding apparatus |
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