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

Imaging Biological Samples with Optical Microscopy

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

You might also read

Related Articles

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

Sort by

Same author

Exclusive Magnetic Excitation Enabled by Structured Light Illumination in a Nanoscale Mie Resonator.

ACS nano·2018

Same author

Electrical current through individual pairs of phosphorus donor atoms and silicon dangling bonds.

Scientific reports·2016

Same author

Dynamic tunneling force microscopy for characterizing electronic trap states in non-conductive surfaces.

The Review of scientific instruments·2015

Same author

Short communication: Substituting dry distillers grains with solubles and rumen-protected amino acids for soybean meal in late-lactation cows' diets based on corn silage or ryegrass silage.

Journal of dairy science·2015

Same author

Short communication: Effects of increasing protein and energy in the milk replacer with or without direct-fed microbial supplementation on growth and performance of preweaned Holstein calves.

Journal of dairy science·2014

Same author

Stable inhibition of specific estrogen receptor α (ERα) phosphorylation confers increased growth, migration/invasion, and disruption of estradiol signaling in MCF-7 breast cancer cells.

Endocrinology·2012

Same journal

Gaussian-modulated continuous-variable quantum key distribution over 60 km fiber using an integrated silicon photonic receiver.

Optics letters·2026

Same journal

E2E-OCT: end-to-end joint learning model using optical coherence tomography images for vocal cord leukoplakia diagnosis.

Optics letters·2026

Same journal

Holographic generation of panoramic 3D scenes by concave ellipsoidal mirror reflection.

Optics letters·2026

Same journal

Dual-pilot phase recovery with pair-wise maximum-ratio combining for coherent PONs.

Optics letters·2026

Same journal

Mapping the whispering gallery modes of a CaF<sub>2</sub> disk resonator with half-tapered fibers to estimate the fundamental mode volume.

Optics letters·2026

Same journal

Quantitative estimation of deep-subwavelength scale via dark-field scattering axial energy concentration decay profiles.

Optics letters·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 20, 2026

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Absolute optical ranging with 200-nm resolution.

C C Williams, H K Wickramasinghe

|September 16, 2009

Summary

This summary is machine-generated.

Wavelength-multiplexed interferometry achieved 200 nm range resolution, enabling unambiguous nanometer-resolution distance measurements. This optical ranging system successfully profiled integrated circuit surface topography with high precision.

More Related Videos

Bringing the Visible Universe into Focus with Robo-AO

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Related Experiment Videos

Last Updated: Jun 20, 2026

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Bringing the Visible Universe into Focus with Robo-AO

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Area of Science:

Optical Metrology
Precision Engineering
Semiconductor Manufacturing

Background:

Absolute optical ranging is crucial for precise distance measurements.
Overcoming single-wavelength ambiguity is a key challenge in interferometry.
Existing methods often lack the required resolution for micro-scale profiling.

Purpose of the Study:

To demonstrate absolute optical ranging with sub-wavelength resolution.
To achieve unambiguous distance measurements with nanometer precision.
To apply the developed ranging system for integrated circuit surface profiling.

Main Methods:

Utilizing wavelength-multiplexed interferometry with two tunable GaAlAs laser diodes (850 nm).
Employing current and temperature tuning to achieve an equivalent wavelength below 100 microm.
Combining single- and multiple-wavelength interferometric measurements.

Main Results:

Achieved a range resolution of 200 nm, significantly below the single-wavelength ambiguity.
Demonstrated unambiguous distance measurement with nanometer resolution.
Successfully profiled an integrated circuit structure with 2.5-microm surface topography.

Conclusions:

Wavelength-multiplexed interferometry offers a robust solution for high-resolution absolute optical ranging.
The developed system enables precise metrology for micro-scale applications.
This technique facilitates unambiguous profiling of complex surface topographies.