| 摘要 |
FIELD: information technology. ^ SUBSTANCE: apparatus has a first information code track of length N=2n, n reader elements placed along said track with angular spacing =360/N, a second information code track of length M=2m, m reader elements placed along said track with angular spacing (+2), where 2=360/NM, a regular code track of length 2NM, uniformly quantised with sampling period sk.=360o/2NM, a reader element for the regular code track displaced from the first of n reader elements by an angular distance k=2esk.+(sk/2), n additional reader elements displaced from the last of n reader elements by an angular distance kn=(i+sk) and placed along the first information code track with angular spacing equal to , m additional reader elements displaced from the first of m reader elements by an angular distance km=(j+m)+sk., and placed along the second information code track with angular spacing (+2), a code converter, an inverter, AND elements, OR elements and decoders. ^ EFFECT: simple recursive code scale. ^ 1 dwg, 6 tbl |
