What does „ABBE number“ mean?

The ABBE number is a dimensionless parameter named after Ernst Abbe. It is a measure of the material dispersion and shows how much the refractive index changes with the wavelength of the light. The higher the dispersion, the smaller the ABBE number. The number is given by a function of the refractive index of the material at 486.1 nm, 587.6 nm and 656.3 nm.

The ABBE number is mainly used to characterize and monitor the quality of glasses and polymers used in lens production.

Dear valued customer and business friend,

We are taking all possible measures to secure the health of our employees as well as our customers.

As we have already informed you, Schmidt+Haensch remains fully operational.

We are organising whenever possible work from home offices. Our production lines are continuously producing and our supply chains are so far secured.

We are most interested to offer our services as usual. Instead of personal visits we have built up internet communications in order to help you remotely.

All our contacts as well as phone numbers remain accessible.

For service issues please do not hesitate to contact us via e-mail to service@schmidt-haensch.de or telephone under +49 (030) 417 072 – 41 / - 42

For sales inquiries please contact us via e-mail to sales@schmidt-haensch.de or call our sales engineers.

We wish you to stay well and healthy.

Let us try to overcome these most exceptional circumstances by looking after each other with the necessary care and distance.

Best regards

Mathis Kuchejda


Corona Update