APOCHROMATIC LENS Russian patent published in 1997 - IPC

FIELD: instrumentation engineering, in particular, photographic optics. SUBSTANCE: apochromatic lens uses two components, the first of which is made in the form of converging and diverging lens menisci with their convexity facing the object, diverging meniscus with its convexity facing the image, positive diffraction optical cell and a collecting lens, the second component uses two diverging menisci with their convexity facing the image, and a biconvex lens positioned between them. The lens components are divided by an aperture diaphragm positioned between them. EFFECT: improved design. 5 dwg