HIGH-SPEED IMMERSION MICROOBJECTIVE LENS OF MEDIUM MAGNIFICATION Russian patent published in 1997 - IPC

FIELD: optics, microscopes of passing light intended for investigation and photography of biological luminescent objects. SUBSTANCE: proposed microobjective lens has five components, first component - single plano-convex lens facing immersion with flat surface. Lens is manufactured from material having refractive index and dispersion factor not less than 1.7 and 50.0 correspondingly. Second component is bonded from negative and positive lenses having relation of dispersion coefficients of optical materials ν₂₁ and ν₂₂ chosen from condition 1,4ν₂₂ < ν₂₁ < 2,0ν₂₂. Third component includes biconcave lens placed between two biconvex lenses. Fourth component is solitary meniscus facing image space with concavity. Fifth component presents binary meniscus facing image space with concavity. EFFECT: expanded application field.