Related Experiment Video
Updated: Jun 16, 2026
07:56
Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light
Published on: September 20, 2017
Light scattered by a liquid crystal: a new quasi-thermal source
Applied Optics
|February 4, 2010
Summary
Laser light scattered by liquid crystals creates a coherent source with adjustable properties. This new quasi-thermal source offers an alternative to traditional methods for controlling light coherence.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Laser light exhibits specific spatial and temporal coherence properties.
- Liquid crystal cells are used in various optical applications.
Purpose of the Study:
- To investigate the spatial and temporal coherence of laser light scattered by a liquid crystal cell under an external DC field.
- To explore the potential of this scattered light as a quasi-thermal source.
Main Methods:
- Studying laser light scattered from a liquid crystal cell subjected to an external DC electric field.
- Analyzing the coherence time and spatial coherence of the scattered light.
- Investigating the influence of applied voltage and illuminated spot dimensions.
Main Results:
- The scattered light exhibits a very long coherence time.
- Coherence time is tunable by adjusting the applied voltage.
- Spatial coherence is adjustable by varying the illuminated spot size.
- The effects of correlation length relative to spot size were examined.
Conclusions:
- The scattered light from liquid crystals functions as a novel quasi-thermal light source.
- This source provides an alternative to the rotating ground glass disk method.
- The study demonstrates controllable coherence properties for advanced optical applications.
