PLAN-APOCHROMATIC HIGH-APERTURE MICROLENS Russian patent published in 2013 - IPC G02B21/02 G02B9/64 G02B11/34 

FIELD: physics.

SUBSTANCE: microlens has a first component I with optical power F_I in form of a frontal meniscus whose concave surface faces the object space, and a biconvex positive lens, a second component II with optical power F_II, consisting of a positive lens consisting of a negative meniscus whose concave surface faces the image space and a biconvex lens, a biconvex lens with optical power F_II5, consisting of a lens with optical power F_II6.7, which consists of a negative meniscus whose concave surface faces the image space, and a biconvex lens, and a biconcave lens. The third component III with optical power F_III comprises a plane-convex lens and a meniscus whose concave surface faces the object space and consists of a positive meniscus and a negative meniscus. The ratio of optical power values of the lenses and the overall lens and dispersion coefficients of the lens materials satisfy conditions given in the claim.

EFFECT: high image quality as a result of correction of image curvature and chromatic difference of values when the numerical aperture and linear field of view increase.

2 cl, 1 dwg, 1 app