FIELD: optics. SUBSTANCE: given microlens includes first and second single positive components made in the form of meniscuses facing space of objects with concavity and placed in series, third and fourth positive components bonded together from negative and positive lenses, sixth and seventh negative components coming in the form of meniscuses cemented together from positive and negative lenses facing space of images with concavity, fifth positive component fabricated in the form of single positive lens being located between fourth and sixth components. EFFECT: enlarged input numerical aperture with improvement of correction of polychromatic aberrations of off-axis beams. 1 dwg
