Digital holography (DH) has emerged as one of the most effective coherent imaging
technologies. The technological developments of digital sensors and optical elements have …

There has been immense advancement in laser-based projection imaging, fluorescence
microscopy, single-molecule localization nanoscopy, and digital holography. These …

In this paper, we present a concept for speckle reduction using optical superposition instead
of temporal superposition. The proposed speckle reduction method does not contain any …

Compact and flexible optical components are expected to be utilized in laser-imaging
systems. We introduce a novel technique for producing self-made ultrathin flexible diffractive …

A speckle reduction method based on a rotating ball lens is proposed and assessed. The
fast rotation of the ball lens results in angle diversity and thus reduced speckle. Furthermore …

A method of speckle suppression without any active device is expected for pico-projectors.
The effectiveness of the passive method of speckle reduction using a single multimode fiber …

This paper describes a speckle suppression method using flexible diffractive optical
elements (DOEs) based on binary random sequences with tracked motion. The DOE loops …

In this paper, we present experimental results on speckle noise suppression using a
completely passive method. The passivity of the method is achieved owing to the absence of …

Our study proposes a novel method for obtaining speckle-free homogeneous illumination
using a combination of a multi-retarder plate, a microlens array, a Fourier lens, and a …

We present the first general theoretical description of speckle suppression efficiency based
on an active diffractive optical element (DOE). The approach is based on spectral analysis of …