Abstract: In imaging optics with main optics having several optical elements, and in which the main optics are corrected for an observation radiation, there is further provided a transmissive, diffractive element, which is arranged and provided in the observation beam path of the imaging optics such that, due to the diffractive effect of the diffractive element, at least one aberration of the main optics is corrected for an inspection radiation having a different wavelength than that of the observation radiation.

Abstract: In an objective (1), in particular a microscope objective, said objective comprising an object-side first optical group (5) with a positive refractive power, and a second optical group (6), arranged following the first optical group (5), with a negative refractive power, and said first optical group (5) including several refractive elements (7, 8, 9, 10), the first optical group (5) comprises at least one diffractive element (11) having a refraction-enhancing and achromatizing effect.

Abstract: In an objective, in particular a microscope objective, wherein the objective has a first optics group on the object side with positive refractive power and a second optics group with negative refractive power following the first optics group, and wherein the first optics group contains a plurality of refractive elements, the first optics group contains at least one diffractive element with a refraction-increasing and achromatizing effect.