GB595940A - Method and apparatus for counting or examining optical interference rings or lines - Google Patents
Method and apparatus for counting or examining optical interference rings or linesInfo
- Publication number
- GB595940A GB595940A GB1758045A GB1758045A GB595940A GB 595940 A GB595940 A GB 595940A GB 1758045 A GB1758045 A GB 1758045A GB 1758045 A GB1758045 A GB 1758045A GB 595940 A GB595940 A GB 595940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- counting
- lines
- mask
- wavelength
- 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
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
595,940. Interferometers utilising light sensitive cells. STULAND, T. July 10, 1945, No. 17580. [Class 40 (iii)] [Also in Group XX] Interference patterns are imaged on a mask constituted by an image (e.g. a photographic negative) of the pattern, so that any disturbance results in light passing through the mask to a photo-electric cell. In Fig. 1, the interference pattern is produced by light from a source S, reflected from fixed and movable reflectors M2, M3, and the cell PE actuates a counter C to count the production of bands as M3 is moved and thus indicating the extent of movement. To determine an unknown wavelength in terms of the light from S, a similar system is added using the other side of M3 as a reflector, so that a comparison of the two counters enables the wavelength to be compared, Fig. 3, not shown. By using equipment developing Newton rings, vibration can be detected, Fig. 3, not shown. The invention may also be applied to measure changes in refractive index.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB595940A true GB595940A (en) | 1947-12-23 |
Family
ID=1733217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1758045A Expired GB595940A (en) | 1945-07-10 | Method and apparatus for counting or examining optical interference rings or lines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB595940A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2571937A (en) * | 1948-08-27 | 1951-10-16 | Research Corp | Interferometer with right-angle reflector surfaces at end of each divided beam |
| US2583596A (en) * | 1948-01-06 | 1952-01-29 | Root Elihu | Optical system for path-length multiplication in interferometers |
| US2848921A (en) * | 1952-06-11 | 1958-08-26 | Genevoise Instr Physique | Apparatus for measuring very little lengths |
| DE1090881B (en) * | 1955-11-28 | 1960-10-13 | Motorola Inc | Device for obtaining an electrical signal from an optical interference figure |
| US2972278A (en) * | 1957-08-26 | 1961-02-21 | Philco Corp | Optical interferometric position indication |
| US3753619A (en) * | 1970-10-27 | 1973-08-21 | Beckman Riic Ltd | Interference spectroscopy |
-
1945
- 1945-07-10 GB GB1758045A patent/GB595940A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2583596A (en) * | 1948-01-06 | 1952-01-29 | Root Elihu | Optical system for path-length multiplication in interferometers |
| US2571937A (en) * | 1948-08-27 | 1951-10-16 | Research Corp | Interferometer with right-angle reflector surfaces at end of each divided beam |
| US2848921A (en) * | 1952-06-11 | 1958-08-26 | Genevoise Instr Physique | Apparatus for measuring very little lengths |
| DE1090881B (en) * | 1955-11-28 | 1960-10-13 | Motorola Inc | Device for obtaining an electrical signal from an optical interference figure |
| US2972278A (en) * | 1957-08-26 | 1961-02-21 | Philco Corp | Optical interferometric position indication |
| US3753619A (en) * | 1970-10-27 | 1973-08-21 | Beckman Riic Ltd | Interference spectroscopy |
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