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Confocal Fluorescence Microscopy

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Updated: Apr 30, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Note: laser beam scanning using a ferroelectric liquid crystal spatial light modulator.

Abhijit Das¹, Bosanta R Boruah¹

¹Department of Physics, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.

The Review of Scientific Instruments

|May 3, 2014

Summary

This summary is machine-generated.

This study demonstrates laser beam scanning using a ferroelectric liquid crystal spatial light modulator. This technique enables precise beam steering for applications like laser scanning optical sectioning microscopy.

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Last Updated: Apr 30, 2026

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Area of Science:

Optics and Photonics
Microscopy Technology

Background:

Ferroelectric liquid crystal spatial light modulators (FLC SLMs) can display rapid sequences of images.
Time dithering techniques allow FLC SLMs to represent complex images using multiple binary frames.
Binary phase holograms can precisely control laser beam direction.

Purpose of the Study:

To develop a laser beam scanning system utilizing FLC SLMs.
To integrate this scanning system into a laser scanning optical sectioning microscope.

Main Methods:

Utilizing FLC SLMs to display sequential binary images at high speed (85 images/sec).
Encoding each binary image as a phase hologram.
Directing a diffracted laser beam using the generated holograms.

Main Results:

Successful construction of a laser beam scanner.
Demonstration of the scanner's capability to steer a laser beam.
Integration and successful operation within a laser scanning optical sectioning microscope.

Conclusions:

FLC SLMs are effective for high-speed laser beam scanning.
This method provides a viable approach for beam steering in microscopy.
The developed scanner enhances laser scanning optical sectioning microscopy capabilities.