Live code pattern and optical reading system - has lined surface pattern with inset characters read by reflecting laser output from surface, then focussing light onto sensor

摘要

The optical reading system utilises a coding pattern suitable for reproduction on the surface of an object, such as a semiconductor element has a pattern formed that will produce a reflected light pattern. One version is in the form of a surface pattern that has grooves formed in the surface (5). Into this pattern and cutting through it may be alphanumeric character forms. A laser light source (1) is transmitted through an optical system (2) that has a semi-reflecting mirror (4) to direct the emission onto the surface. The reflected components are focussed (6) onto a sensor (8). ADVANTAGE - Provides good signal to noise ratio for fine resolution patterns.