Optical encoder has light source, a main scale, which has a first grid, and a second grid, which has a 4N group of slots arranged in a sample matrix, whereby each group of slot has several slots

摘要

Optical encoder has a light source, a main scale, which has a first grid, and a second grid, which has a 4N group of slots arranged in a sample matrix, whereby each group of slot has several slots. Optical encoder also has a light receiving element which is designed to produce four types of periodically displaced signals. Each of the columns of the second grid has types of four of slots, which corresponds four types of displaced signals. Any combination of four groups of slot, which are arranged in a sample matrix consists of 2 rows and 2 columns.