Surface modification of SnO 2 electron transporting layer (ETL) plays a critical role in the
performance of SnO 2-based planar perovskite solar cells (PSC). Here, we show how long …

A simple collimation technique based on measuring the period of one self-image produced
by a diffraction grating is proposed. Transversal displacement of the grating is not required …

This communication reports investigation undertaken towards measurement of slope and
defect detection of bent plates (rectangular and circular) using moiré deflectometry in …

A simple and robust method for introducing a phase-shifting test procedure in a wedge-plate
shearing interferometer is proposed. The output of the wedge-plate lateral shearing …

As a key part in high-power laser facility, the spatial filter is used to determine the optical axis
of the entire laser system, which consists of two conjugate lenses at both ends and filter hole …

The phase height model is developed in the phase measuring profilometry, while the
geometry transformation model is proposed in the structured light method and the active …

A collimated optical beam is required in several applications such as metrology, optical
processing, free space propagation of information, and laser-based instrumentation. Prior to …

In present communication, a simple technique for measurement of displacement using
phase shifted wedge plate lateral shearing interferometry is described. The light beam from …

Highly collimated beams are required in numerous applications and techniques. Different
methods have been proposed for collimating monochromatic point light sources during the …

We propose an accurate technique for obtaining highly collimated beams, which also allows
testing the collimation degree of a beam. It is based on comparing the period of two different …