PLAN-APOCHROMATIC HIGH-APERTURE MICROOBJECTIVE OF LOW MAGNIFICATION Russian patent published in 2002 - IPC

FIELD: optics. SUBSTANCE: proposed microobjective includes five components. First positive component comes in the form of single meniscus facing space of objects with concavity, second component is single positive meniscus, third component comprises biconvex and negative lenses cemented together, fourth component is single positive lens and fifth negative component includes positive and negative lenses facing space of images with concavity. Positive lens of fifth component can be biconvex. EFFECT: possibility of correction of monochromatic and chromatic aberrations of axial and off-axis beams, enhanced entrance numerical aperture. 1 cl, 1 dwg