METHOD FOR DETERMINING ABSOLUTE CODING OF AN OPTICAL CODING TRACK

摘要

The method involves modulating illuminating light on code elements (100, 100'), determining an absolute code (10) as modulated light, and continuously varying modulation of the light on neighboring code elements. A sensor (20) is formed for acquisition with continuous variation of modulated light at the neighboring code elements. Height (25) of the sensor is larger than height (105) of the code elements. The absolute code is formed as aperture stop with continuous variation of code heights (101, 101') of the neighboring code elements. Independent claims are also included for the following: (1) an optical code track (2) a system for determining absolute code of an optical code track (3) a method for manufacturing an optical code track (4) a computer program product comprising a set of instructions for determining absolute code of optical code track.