OPTICAL OBJECTIVE HAVING FIVE LENSES WITH FRONT FOCUSING

摘要

Optical system comprising five lenses, a front pupil and achieving focus for objects from close to infinity by adjusting, via a MEMS actuator, the position of a subset of lenses located on the object-side of the optical system. The most object-side, biconvex, lens provides a substantial amount of the system's optical power for achieving focus from an object as close as 10 cm away from the aperture stop.