Posture detecting device, recording apparatus including the same, lenticular sheet, and method for detecting posture of medium

A lenticular sheet comprising:

• a lenticular lens having a plurality of convex lens parts in a semi-columnar shape arranged in parallel to one another;
• an ink absorbing layer provided on a surface, of the lenticular lens, opposite the plural convex lens parts;
• and
• a detection target provided on the ink absorbing layer and detected by a detecting mechanism disposed in a recording apparatus,
• wherein the detection target includes:
• a plurality of first detection targets each extending in an axial direction of the convex lens parts and arranged along a width direction of the convex lens parts perpendicular to the axial direction of the convex lens parts;
• and
• a plurality of second detection targets each extending in a width direction of the convex lens parts and arranged along the axial direction of the convex lens parts, and
• at least one of an arrangement interval of the detection target, a shape of the detection target, a material of the detection target, and an optical property of the detection target is different among the plurality of first detection targets and the plurality of second detection targets.

A method for detecting a posture of a medium, comprising:

• preparing the medium having:
• a plurality of detection targets including a plurality of first detection targets each extending in a first direction and arranged at equal intervals in a second direction intersecting with the first direction at a predetermined angle;
• and a plurality of second detection targets each extending in the second direction and arranged at equal intervals in the first direction;
• moving a detecting mechanism detecting the detection targets relatively to the recording medium in a scanning direction which is parallel to the second direction under a condition that the recording medium is set in a reference posture;
• and
• detecting a tilt of the recording medium from the reference posture, based on a detection result of the detection targets which is obtained by the detecting mechanism while moving in the scanning direction relatively to the recording medium.