Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Confocal Fluorescence Microscopy

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Dome-shaped Fresnel lens concentrator with high efficiency and angular performance.

Applied optics·2026

Same author

Multi-wavelength design and off-axis optimization of a hybrid Fresnel concentrator for enhanced irradiance uniformity.

Applied optics·2026

Same author

Compact single-panel LCD projector with high uniformity.

Applied optics·2023

Same author

Prediction of surface roughness in different machining methods using a texture mask feature extraction method: publisher's note.

Applied optics·2023

Same author

Prediction of surface roughness in different machining methods using a texture mask feature extraction method.

Applied optics·2023

Same author

High-contrast ratio and high-efficiency anamorphic DLP illumination system design with a freeform surface lens.

Applied optics·2021

Search research articles

Related Experiment Video

Updated: Oct 2, 2025

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

High speckle reduction rate in a laser projection system.

Yue-Xun Song, Jui-Wen Pan

|February 24, 2022

Summary

This study presents a laser picoprojector design that significantly reduces speckle contrast. Utilizing a holographic diffuser, deformable mirror, and fast electrically tunable (FET) lens enhances speckle reduction efficiency.

Area of Science:

Optics and Photonics
Display Technology

Background:

Laser picoprojectors suffer from speckle noise, degrading image quality.
Reducing speckle contrast is crucial for improving visual performance in projection systems.

Purpose of the Study:

To demonstrate a novel design for a laser picoprojector with an enhanced rate of speckle contrast reduction.
To compare the effectiveness of different holographic diffusers and fast electrically tunable (FET) lenses in mitigating speckle.

Main Methods:

The design incorporates a holographic diffuser, a deformable mirror, and a fast electrically tunable (FET) lens.
Speckle contrast reduction rates were evaluated using holographic diffusers with varying divergence angles and FET lenses with different optical power ranges.

Main Results:

More Related Videos

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation

Published on: August 30, 2017

Laser-induced Forward Transfer of Ag Nanopaste

Laser-induced Forward Transfer of Ag Nanopaste

Published on: March 31, 2016

Related Experiment Videos

Last Updated: Oct 2, 2025

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation

A Novel Approach to Overcome Movement Artifact When Using a Laser Speckle Contrast Imaging System for Alternating Speeds of Blood Microcirculation

Published on: August 30, 2017

Laser-induced Forward Transfer of Ag Nanopaste

Laser-induced Forward Transfer of Ag Nanopaste

Published on: March 31, 2016

The combination of components significantly increased the speckle contrast reduction rate.
Specific increases observed: 4.76 to 5.74 (5x5 diffuser), 3.45 to 5.66 (10x10 diffuser), and 1.52 to 4.58 (30x30 diffuser).

Conclusions:

The proposed laser picoprojector design effectively accelerates the achievement of minimum speckle values.
The system's performance is tunable through the selection of holographic diffuser and FET lens parameters.