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Method and apparatus for two-dimensional absolute optical encoding
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 2004 |
| Description | This invention presents a two-dimensional absolute optical encoder and a method for determining position of an object in accordance with information from the encoder. The encoder of the present invention comprises a scale having a pattern being predetermined to indicate an absolute location on the scale, means for illuminating the scale, means for forming an image of the pattern; and detector means for outputting signals derived from the portion of the image of the pattern which lies within a field of view of the detector means, the field of view defining an image reference coordinate system, and analyzing means, receiving the signals from the detector means, for determining the absolute location of the object. There are two types of scale patterns presented in this invention: grid type and starfield type. |
| File Size | 766167 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080005158 |
| Archival Resource Key | ark:/13960/t8x975g4d |
| Language | English |
| Publisher Date | 2004-07-20 |
| Access Restriction | Open |
| Subject Keyword | Optics Patents Position Location Coding Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
