PLAN-APOCHROMATIC HIGH-APERTURE MICROLENS Russian patent published in 2013 - IPC G02B21/02 G02B9/62 

FIELD: physics.

SUBSTANCE: first component I with optical power φ_I is in form of a frontal meniscus whose concave surface faces the object space, and a biconvex lens. The second component II with optical power φ_II consists of a biconvex lens and a biconcave lens glued together, a biconvex lens with optical power φ_II5 and a glued lens with optical power φ_II6.7, consisting of a diverging meniscus whose concave surface faces the image space, and a biconvex lens. The third component III with optical power φ_III is in form of a meniscus whose concave surface faces the object space, glued from a converging meniscus and a diverging meniscus. The ratio of optical power values of the lenses φ_II5,6,7 and the lens overall φ_l satisfies the condition: $$\mathrm{0,3}\le \frac{{\phi }_{II\mathrm{5,6,7}}}{{\phi }_{\text{I}}}\le \mathrm{0,7.}$$ The biconvex lens with optical power φ_II5 and the biconvex lens of the glued lens of the second component are made of material with dispersion coefficient 58<v_d<95.2. The diverging meniscus of the glued lens of the second component is made of material with dispersion coefficient 57<V_d<60.

EFFECT: improved mono and chromatic aberrations of axial and off-axis beams and a larger entrance aperture.

2 cl, 1 dwg, 1 app