Optical metrology · Software development · Image processing

Optical metrology · Software development · Image processing

  • Welcome

    • Company

  • News

  • Exhibitions

  • Products

    • Optics Test Equipment

    • Meters for Contact angle and surface tension

    • measuring systems for beverage can manufacture

    • drawing die and wire measurement

    • Measurement of Straightness, Flatness, positioning uncertainty of round tables

    • Semiconductor technology, Micro scriber

    • Measuring microscopes, Image processing

    • Flatness, Bow, Warp, curvature, glass thickness

    • Measuring systems for night vision systems

  • Product videos

  • Software Download

    • COMEF

    • ELCOLEVEL

    • ELCOWIN

    • RTM

    • SURFTENS

    • Teamviewer

  • Contact

    • ISO 9001 Certificate

    • Representatives

    • privacy policy

Contact angle standard for proof of reproducibility and accuracy of contact angle meters

 

Get in touch >

 

Contact Angle Standard description and application

 

The contact angle standard is a glass plate with images, representing sessile drops with different contact angles.

The contact angle standard is manufactured by a high accurate lithographic process, so the images itself are very accurate according the given CAD-data. The Glass plate is placed on the measuring table instead of a real drop.

The proof of the reproducibility of the contact angle measurement is performed by a repeated measurement of the object (sessile drop). For a correct test, the measurement must be performed, using the live video (not a frozen image). For a real sessile drop exists the problem, that it evaporates permanently. The result of the permanent evaporation is the permanent change of the contact angle. Therefore, the proof of the reproducibility of the contact angle measurement is not possible, using a real liquid, since the object changes permanently the contact angle!

 

The contact angle standard does not change the form (contact angle) and can be used therefore as object to proof the reproducibility of the measuring system.

Moreover, the pictures are manufactured very accurate and symbolize different contact angles. Therefore the contact angle standard can be used perfectly to proof the absolute measuring accuracy of a contact angle measuring system!

 

Download PDF