HIGH-MAGNIFICATION PLAN-APOCHROMATIC HIGH-APERTURE MICROLENS Russian patent published in 2014 - IPC G02B21/02 G02B9/64 

FIELD: physics.

SUBSTANCE: microlens comprises five components. The first component comprises a meniscus whose convex side faces the image space and a positive lens glued from a negative meniscus facing the image space with its convex side and placed in front of said first meniscus. The second component consists of two positive lenses, the first being glued from a positive and a negative meniscus, facing the image space with their convex sides, and the second being a biconvex lens and a negative meniscus, facing the image space with its convex side. The third component is glued from a negative meniscus, facing the image space with its concave side, and a biconvex lens, and an additional biconvex lens in front. The fourth component comprises a separate positive meniscus facing the image space with its concave side, and a lens glued from a positive and a negative lens. The fifth component includes a lens glued from two menisci facing the object space with their concave side, and in front of said lens, a separate meniscus facing the object space with its concave side.

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

2 cl, 1 dwg, 1 tbl, 1 app