| 摘要 |
FIELD: electronic engineering. ^ SUBSTANCE: device has coordinate scale having raster and code path of which the first one is represented as a chain of windows forming regular raster and the second one is represented as a chain of code windows, reading unit having illumination unit, analyzing raster mask, raster path photodetectors, and multi-element raster path photodetector. The raster path photodetectors, and multi-element raster path photodetector are connected to recording and analyzing unit, respectively. The reading unit has analyzing code mask being two window paths arranged so that succession period is a multiple of code step and window width is equal to the code step. The windows on the paths are shifted by a value equal to half code step. ^ EFFECT: eliminated ambiguity in reading coordinate code; high performance and accuracy. ^ 3 cl, 6 dwg |
