Patent ID: 7815118
Filing Date: 2010-10-19
Classification: G06K

Abstract:
1. A diaphragm for a linear optical code reader, comprising a light stopping portion and a light passing portion, wherein the light passing portion has a first section with a constant first smaller dimension in a direction of an optical code for forming a first image of the optical code onto a linear sensor, the first smaller dimension being smaller than a longitudinal dimension of the first section, the longitudinal dimension of the first section being orthogonal to the direction of the optical code, and at least one second section with a constant second smaller dimension in the direction of the optical code for simultaneously forming a second image of the optical code onto said linear sensor, the second smaller dimension being smaller than a longitudinal dimension of the second section, the longitudinal dimension of the second section being orthogonal to the direction of the optical code, said second smaller dimension being different from said first smaller dimension, the first section and the second section completely extending on different sides of a line parallel to the direction of the optical code.