Patent ID: 8526126

Claim:
Objective comprising a monolithic optically transparent body, the surface of which comprises: a first optical refractive functional area serving as entrance area through which electromagnetic radiation can enter the objective; a second optical reflective functional area serving as a first mirror; a third optical reflective functional area serving as a second mirror; a fourth optical reflective functional area serving as a third mirror; a fifth optical reflective functional area serving as a fourth mirror; and a sixth optical refractive functional area serving as an exit area through which electromagnetic radiation can exit the objective; wherein the first to sixth optical functional areas are arranged such that a center shading-free, folded optical path extends from the entrance area through the monolithic body via the first mirror, the second mirror, the third mirror and the fourth mirror to the exit area, in the stated order; no intermediate image level is located between the entrance area and the exit area; and the first to sixth optical functional areas comprise a common optical axis.