NLS-GLOSSARY

Measuring method named after Ernst Abbe used to determine the focal length and the position of the principal planes of a lens singlet or a lens system on the optical axis... Determination of the focal length of single lenses according to Abbe: To determine the focal length of a single lens, you need an object (light source and slit), a screen and the lens whose focal length is to be determined. The position of the lens is fixed on an optical bench. The object and screen are positioned so that a sharp image is obtained. A further focus is made for an object displaced by d . The focal length f zu results from d , the object size G and the two image sizes B and B', f=dG B'-GB... The ABBE number is a dimensionless parameter named after Ernst Abbe. also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength).

Primary location: Ismaning Germany