Optical Devices & Lenses equipment from the PHYWE Light & Optics range. 2 products, 110V/60Hz adapted for U.S. labs.
Color mixing in experiments on optical profile bench with LED lamp, supplied in the U.S. by American Scientific. Contact us for specifications.
The focal lengths of unknown lenses are determined by measuring the distances of image and object and by Bessel's method. Simple optical instruments are then constructed with these lenses.