Metrology: We only manufacture what we can measure.

We guarantee our clients a uniformly high quality of our products which we ensure with suitable and sophisticated measuring instruments and measuring techniques. For this purpose, we often develop individualized measurement setups to optimally comply with the requirements of our clients. Extensive test reports record the measurement results in graphics, 3D images and numerical data.

Basis for the error-free functionality of optical components and systems is the use of the right optical glass. Therefore, we carefully inspect all materials used for our products.

Our test equipment and measurement technologies:

Wavefront measurements

  • Interferometer ZYGO GPI-XP 4" for plane surfaces
  • Interferometer LT-Ultra IFM 12" for plane surfaces
  • Interferometer LT-Ultra 4" for plane surfaces
  • Interferometer FISBA µPhase 1000 for curved surfaces
  • Interferometer Möller-WEDEL VI-direct curved surfaces


  • Goniometer TRIOPTICS PrismMaster
  • Goniometer ZEISS Workshop 1
  • Goniometer ZEISS Workshop 2

Goniometry of small angles

  • Autocollimator ZEISS

Reflection/trans­mission measurement

  • Spectrophotometer PerkinElmer LAMBDA 950

Visual surface inspection

  • Stereomicroscope with digital camera

Surface defect measurement

  • Measuring microscopes with different evaluation technologies

Tests on coating

  • Abrasion resistance (eraser test) as per DIN ISO or MIL
  • Adhesion (tape test) as per DIN ISO or MIL
  • Environmental / climate test as per DIN ISO or MIL on client’s special request

Monitoring of coating process

  • To verify the optical properties at least one test glass is archived from each coating batch

Measurements of size, shape and position

  • 3D coordinate measuring machine

Client and application-specific measuring devices

  • For client-specific measuring or testing jobs we develop special measuring and test equipment incl. customized software applications; for this, we use oft client’s own apparatus or fixtures
Testing panel DIN ISO / MIL

Testing panel DIN ISO / MIL

Thickness measurement of plane plate

Thick­ness mea­sure­ment of plane plate

Visual error measurement

Visual error mea­sure­ment

Angular measurement with Goniometer

Angular mea­sure­ment with Gon­io­me­ter

µm testing of plano plates

µm testing of plano plates

Flatness testing during production

Flatness testing during production



Interferometer report

In­ter­fe­ro­me­ter report