HIGH-MAGNIFICATION PLAN-APOCHROMATIC MICROLENS WITH INCREASED WORKING DISTANCE Russian patent published in 2015 - IPC G02B21/02 G02B9/64 

FIELD: physics.

SUBSTANCE: microlens can be used in microscopes for visual observation, output to a TV camera or photographing low-contrast microscopic structures at the resolution limit of optical microscopes. The microlens comprises four components. The first component comprises n frontal separate positive lenses. The second component comprises a triple-glued lens made of two biconvex lenses with a biconcave lens in between, and two double-glued positive lenses, facing each other by positive lenses. The third positive component is double-glued and consists of a biconvex lens and a negative lens. The fourth component comprises a double-glued lens consisting of a biconvex lens and a biconcave lens, and an additional lens.

EFFECT: longer working distance while achieving plan-apochromatic correction.

4 cl, 1 dwg, 1 app, 2 tbl