ACHROMATIC WATER-IMMERSION OBJECTIVE LENS FOR MICROSCOPE Russian patent published in 1994 - IPC

FIELD: optical instrumentation. SUBSTANCE: achromatic water-immersion objective lens for microscope has plano-convex frontal lens, second biconvex single lens, negative meniscus facing image space with concavity and cemented from two biconvex and biconcave lenses, first biconvex single lens, positive meniscus facing image space with concavity and cemented from biconvex and biconcave lenses. Focal distance is 4.0 mm; magnification is 40.0; front working length is 0.32 mm, aperture is 0.75. EFFECT: improved efficiency and expanded operational capabilities. 3 dwg