Digital imaging systems (DISs) have been widely used in industrial process control, field
monitoring, and other domains, and the autofocusing capability of DISs is a key factor …

We design a set of near-and far-field detection system with a common optical path. And we
propose a fast autofocusing algorithm based on variable step search and curve fitting for …

Autofocus methods play crucial roles in optical systems, which closely relate to the collected
image quality. Due to the different focal lengths of cervical areas in smears, existing focusing …

In this paper, a depth-sensing method employing active irradiation of a semi-annular beam
is proposed for observing the multi-layered reflective surfaces of transparent samples with …

We describe a simple and robust calibration approach for axial‐scanning microscopy that
realizes axial focus shifts with an electrically tunable lens (ETL). We demonstrate the …

Autofocusing has critical importance for imaging systems with motorized microscopes in
healthcare. It is not possible to diagnose on a picture that captured out of focus. In the …

Microscopes auto focusing is critically important for a great spectrum of scientific and
industrial applications. Finding the best focus position for variety of surfaces under …