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OpTiSurf – Optische Ruwheid

The OpTiSurf uses advanced optics and algorithms to quickly quantify the optical roughness of sheets. OpTiSurf is more objective compared to air-leak or stylus methods, correlates with traditional air leak tests but has greater precision and speed, with less maintenance. The OpTiSurf provides a Roughness Index as well as Roughness values at different size scales.

Demo of the OpTiSurf by OpTest


Product Name: OpTiSurf
Product Code: LFA06
Test Material: Paper, Tissue, Board
Manufacturer: OpTest Equipment Inc.
Availability: Worldwide


  • Advanced optics and algorithms for rapid quantification of optical roughness
  • More objective than air-leak or stylus methods
  • Correlates with traditional air-leak methods but offers greater precision and speed
  • Provides a Roughness Index (ORI) and roughness values at different scales
  • Non-contact measurement, applicable to various types of paper
  • Accepts cut sheets or strips up to 30 cm wide
  • Optical resolution of 125 µm/pixel
  • Roughness (ORI) calibrated to 0.01 µm/field
  • Fast measurement process (< 1 second/field)


  • Faster and more precise than air-leak or stylus methods
  • Minimal maintenance requirements
  • Optical Roughness Index (ORI) correlates with air-leak methods
  • Roughness intensities (FFT) over a size range from 0.25 mm to 32 mm
  • MD and CD values
  • Image storage and retrieval, Excel™ ready data and print-outs


  • The ORI is reported in µm, measurable in machine (MD) and cross machine (CD) directions
  • Optional FFT analysis module determines roughness intensity at 7 scales
  • Reports available in various formats, including XML


  • Instrument: 58 cm L x 50 cm W x 60 cm H (22” L x 20” W x 24” H)
  • Weight: 45 kg


  • 120Vac/60Hz or 240Vac/50Hz, 1 phase, 600 W min.
  • Power must be stable within 2%, and transient free within ± 10%


  • Roughness Intensity (FFT) spectra

Sample Requirements:

  • Flexibility: must wrap around a cylinder of 15 cm diameter
  • Thickness < 2 mm
  • 45° Gloss < 95%
  • Brightness > 20%
  • Opacity > 50%
  • Width > 10 cm
  • Length > 20 cm for automatic operation, > 10 cm in manual mode

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