HIGH-MAGNIFICATION PLAN-APOCHROMATIC HIGH-APERTURE OIL IMMERSION MICROLENS Russian patent published in 2015 - IPC G02B21/02 G02B9/64 

FIELD: physics.

SUBSTANCE: microlens includes three series-arranged components. The first component comprises a double-glued lens consisting of a plane-convex lens and a positive meniscus, facing the object space with the concave side, and a meniscus facing the object space with the concave side and made in the form of a separate lens. The second component is in the form of a triple-glued lens consisting of two biconvex lenses with a biconcave lens placed in between, and two double-glued lenses with a positive meniscus in between, said positive meniscus facing the image space with the concave side. The third component comprises a double-glued meniscus facing the object space with the concave side and made from positive and negative menisci, and a negative meniscus placed on front, facing the image space with the concave side.

EFFECT: larger entrance numerical aperture, linear image field and improved mono and chromatic aberrations of axial and off-axis beams.

2 cl, 1 dwg, 1 app, 1 tbl