Apochromat-objectives without crystals

摘要

This paper proposes combinations of apochromatic pairs of glasses based on special crown glasses and superheavy or heavy crown glasses as alternatives to the combinations ordinarily used. It presents calculations and a comparative analysis of the apochromat-objectives of a collimator with focal length 1000 mm and of a 10 * 0.30 (OM-18) microscope based on the proposed pairs of glasses.