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

FIELD: optical instrumentation. SUBSTANCE: oil-immersion objective lens for microscope has single plano-convex lenses, collecting biconvex lens with equal radii, negative meniscus cemented from biconvex and biconcave lenses, second positive single biconvex lens, positive meniscus facing image space with concavity and cemented from convex- plano and plano-concave lenses and barrel lens. Focal distance 1.6 mm; magnification 100^x, front aperture 1.25; front working length 0.42 mm. EFFECT: increased operational characteristics. 3 dwg