Patent ID: 8611025

Claim:
An optical system for imaging of an object on an image acquisition unit, comprising: a first lens unit; a second lens unit; a third lens unit; a fourth lens unit; a fifth lens unit; and a sixth lens unit, wherein all of the lens units are disposed from the object in a direction of the image acquisition unit with no intervening lens units, wherein the first lens unit includes a converging lens, wherein the second lens unit includes a converging lens and is manufactured from a material whose deviation of the relative partial dispersion fulfills the following condition: Δθ g F >0.025, wherein the third lens unit includes a dispersive lens and is manufactured from a material whose deviation of the relative partial dispersion fulfills the following condition: Δθ g F <−0.0015, wherein the fourth lens unit includes a converging lens, and wherein the fifth lens unit includes a dispersive lens and is manufactured from a material whose deviation of the relative partial dispersion fulfills the following condition: Δθ g F <−0.005.