Related Experiment Video
Updated: Jul 25, 2025
08:39
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
9.9K
Femtosecond-laser-based full-field three-dimensional imaging with phase compensation
Optics Express
|June 29, 2023
Summary
This study introduces a phase compensation method for coherence scanning interferometry (CSI). The technique enhances efficiency for fast, wide-area 3D imaging with nanoscale precision.
Area of Science:
- Optical Metrology
- Nanoscale Imaging
- Interferometry
Background:
- Coherence scanning interferometry (CSI) offers 3D imaging with nanoscale precision.
- System efficiency is often limited by acquisition speed constraints.
Purpose of the Study:
- To develop a phase compensation method for femtosecond-laser-based CSI.
- To improve the efficiency and speed of nanoscale profilometry.
Main Methods:
- Implemented a phase compensation technique to reduce the interferometric fringe period.
- Synchronized heterodyne frequency with the femtosecond laser's repetition frequency.
- Utilized femtosecond-laser-based CSI for high-speed scanning.
Main Results:
- Achieved larger sampling intervals, increasing acquisition efficiency.
- Maintained a root-mean-square axial error as low as 2 nm.
- Demonstrated high scanning speeds of 6.44 µm per frame.
Conclusions:
- The proposed method significantly enhances the speed of CSI systems.
- Enables fast and precise nanoscale profilometry over large areas.
- Overcomes limitations in current CSI acquisition systems.
More Related Videos
Related Concept Videos
01:16Confocal Fluorescence Microscopy
13.4K
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,...
13.4K
01:28Three-Dimensional Microscopy in Microbiology
71
Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
71
01:26Phase Contrast and Differential Interference Contrast Microscopy
8.2K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
8.2K