ISO/TS 20328:2016

Overview - ISO/TS 20328:2016 (Lenticular lens sheet measurements)

ISO/TS 20328:2016 provides standardized methods to measure and specify the dimensional properties of lenticular lens sheets used in lenticular printing (3D, motion/flip, morphing effects). It defines measurement environments, instrumentation requirements, sampling rules, reporting formats and tolerance/precision classifications for critical dimensions such as lenticule width (lens pitch) and sheet thickness, and describes procedures to test dimensional stability under varying temperature and humidity.

Key topics and technical requirements

• Standard ambient conditions: 25 °C ± 2 °C, 50 % RH ± 5 % RH, pressure 96 kPa ± 10 kPa for equilibration and measurement.
• Lenticule width (Wl):
  • Measure an area containing 20+ lenticules; record individual widths and the combined distance (e.g., first to 21st valley).
  • Use calibrated measurement equipment with spatial resolution finer than 20 μm (e.g., stylus-type instrument; example stylus: 5 μm tip, 40°).
  • Report average width, nominal width (derived from nominal lens resolution in lpi), difference from nominal, standard deviation and classify precision:
    • Super high: difference