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Laser extensometer
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stocker, P. J. |
| Copyright Year | 1977 |
| Description | A drift compensated and intensity averaged extensometer for measuring the diameter or other properties of a substantially cylindrical sample based upon the shadow of the sample is described. A beam of laser light is shaped to provide a beam with a uniform intensity along an axis normal to the sample. After passing the sample, the portion of the beam not striking said sample is divided by a beam splitter into a reference signal and a measurement signal. Both of these beams are then chopped by a light chopper to fall upon two photodiode detectors. The resulting ac currents are rectified and then divided into one another, with the final output being proportional to the size of the sample shadow. |
| File Size | 404839 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780006437 |
| Archival Resource Key | ark:/13960/t55f3mf8g |
| Language | English |
| Publisher Date | 1977-12-06 |
| Access Restriction | Open |
| Subject Keyword | Lasers And Masers Coherent Radiation Extensometers Monochromatic Radiation Diameters Laser Applications Beam Splitters Technology Utilization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
