FIELD: measurement technology.
SUBSTANCE: test object includes elements from groups of parallel lines with line width diminishing in geometric progression with denominator equal to 0.94. Each element comprises six groups of paired lines positioned one above another and having common symmetry axis with line width diminishing from lower to upper groups of lines. Width of lines of first element is specified in compliance with mathematical expression.
EFFECT: enhanced quality of evaluation of image.
4 dwg
