  Conventional microscope objective lenses are diffraction limited, which means
that they cannot resolve features smaller than half the illumination
wavelength. Under white light illumination, such resolution limit is about
250-300 nm for an ordinary microscope. In this paper, we demonstrate a new
superlensing objective lens which has a resolution of about 100 nm, offering at
least two times resolution improvement over conventional objectives in
resolution. This is achieved by integrating a conventional microscope objective
lens with a superlensing microsphere lens using a 3D printed lens adaptor. The
new objective lens was used for label-free super-resolution imaging of 100
nm-sized engineering and biological samples, including a Blu-ray disc sample,
semiconductor chip and adenoviruses. Our work creates a solid base for
developing a commercially-viable superlens prototype, which has potential to
transform the field of optical microscopy and imaging.
