Patent ID: 6087054
Filing Date: 2000-07-11
Classification: G02B,Y10S

Abstract:
A method of detecting the relative skew between a reference beam and transparent lenticular material of the type having a repeating pattern of cylindrical lenses, comprising the steps of:forming a beam of light;focusing the beam of light into at least two distinct spots or a line both with a width smaller than the pitch of the cylindrical lenses onto the lenticular material;moving the lenticular material relative to the beam in a direction such that the beam crosses the long axes of the cylindrical lenses to modulate the angle of reflection or refraction of the beam of light; andsensing the position of the modulated beam of light into at least two distinct points separated along the long axes of the cylindrical lenses to determine the skew or relative angular location of lenticular material to the focused spots or line.