IT1140425B - Interferometric deformation measurement system - Google Patents
Interferometric deformation measurement systemInfo
- Publication number
- IT1140425B IT1140425B IT25919/81A IT2591981A IT1140425B IT 1140425 B IT1140425 B IT 1140425B IT 25919/81 A IT25919/81 A IT 25919/81A IT 2591981 A IT2591981 A IT 2591981A IT 1140425 B IT1140425 B IT 1140425B
- Authority
- IT
- Italy
- Prior art keywords
- marker
- photodetector
- laser
- photodetectors
- character
- Prior art date
Links
- 238000005259 measurement Methods 0.000 title abstract 3
- 239000003550 marker Substances 0.000 abstract 4
- 230000003287 optical effect Effects 0.000 abstract 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
The system uses a laser to form interference images of a system of marker characters on the test object has an interference image recording system designed to increase the accuracy whilst ensuring a high degree of resolution. A modulater (3) which shifts the frequency of the laser light is placed between the laser (2) and the optical system (4) which forms the light beams used to form the interference image. The recording system contains a photoreceiver block (8) with two photodetectors (22,23). One photodetector (22) is optically connected to a first marker (28) character and the other to a second marker character (19). The outputs of the photodetectors are connected to an electronic phase measurement instrument (9). A third photodetector and marker are arranged so that the phase difference variation of the photodetector output signals does not exceed 360 degrees over the entire range of deformation measurement.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT25919/81A IT1140425B (en) | 1981-12-30 | 1981-12-30 | Interferometric deformation measurement system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT25919/81A IT1140425B (en) | 1981-12-30 | 1981-12-30 | Interferometric deformation measurement system |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8125919A0 IT8125919A0 (en) | 1981-12-30 |
IT1140425B true IT1140425B (en) | 1986-09-24 |
Family
ID=11218143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT25919/81A IT1140425B (en) | 1981-12-30 | 1981-12-30 | Interferometric deformation measurement system |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1140425B (en) |
-
1981
- 1981-12-30 IT IT25919/81A patent/IT1140425B/en active
Also Published As
Publication number | Publication date |
---|---|
IT8125919A0 (en) | 1981-12-30 |
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