发明名称 |
POSITION DETECTING APPARATUS, AND LENS APPARATUS AND IMAGE PICKUP APPARATUS INCLUDING THE POSITION DETECTING APPARATUS |
摘要 |
A position detector, includes: a scale having pattern arrays formed in different cycles in a movement direction an obtaining unit which obtains signals in accordance with the pattern arrays; a first deriving unit which derives a temporal position of the scale relative to the obtaining unit based on the signals; a second deriving unit which derives a displacement amount of the scale relative to the obtaining unit based on one or more signals of the signals; and a determinates which determines a determined position of the scale relative to the obtaining unit based on the temporal position and the displacement amount, wherein the determinator determines the determined position based on a result of comparison between a difference between first and second temporal positions respectively calculated by the first and second deriving units at first and second positions and a displacement amount from the first position to the second position. |
申请公布号 |
US2015116571(A1) |
申请公布日期 |
2015.04.30 |
申请号 |
US201414527817 |
申请日期 |
2014.10.30 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
SHIGETA Junji |
分类号 |
G01D5/347;G01B11/14;H04N5/232 |
主分类号 |
G01D5/347 |
代理机构 |
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代理人 |
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主权项 |
1. A position detecting apparatus, comprising:
a seals comprising a plurality of pattern arrays formed in different cycles in a movement direction; an obtaining unit configured to obtain a plurality of signals in accordance with the plurality of pattern arrays; a first deriving unit configured to derive a temporal position of the scale with respect to the obtaining unit, based on the plurality of signals; a second deriving unit configured to derive a displacement amount of the scale with respect to the obtaining unit based on one or more signals of the plurality of signals; and a determinator configured to determine a determined position of the scale with respect to the obtaining unit based on the temporal position and the displacement amount, wherein the determinator determines the determined position based on a result of comparison between a difference between a first temporal position calculated by the first deriving unit at a first position and a second temporal position calculated by the first deriving unit at a second position and a displacement amount derived by the second deriving unit from the first position to the second position. |
地址 |
Tokyo JP |