Ultrafast and scan-less three-dimensional imaging using all-optical information conversion with chirped optical frequency comb

Kaoru Minoshima; Takashi Kato

doi:10.1117/12.3023274

18 June 2024 Ultrafast and scan-less three-dimensional imaging using all-optical information conversion with chirped optical frequency comb

Kaoru Minoshima, Takashi Kato

Author Affiliations +

Proceedings Volume 12997, Optics and Photonics for Advanced Dimensional Metrology III; 1299702 (2024) https://doi.org/10.1117/12.3023274
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Fully scan-less three-dimensional imaging method was developed by use of an optical frequency comb. Interferometric measurement between chirped pulse train realized ultrafast information conversion between space, time, and color. Three-dimensional shape information of an object is thus obtained by two-dimensional spectral interference fringe image in a single pulse. With precisely controlled optical frequency combs, precise phase control of optical waves in a pulse train is utilized for all-optical Hilbert tansform to extract amplitude and phase of the obtained interference fringe image, thus two-dimensional spectroscopy is realized. With a monochromatic camera, three-dimensional image is obtained without any scanning. The developed method was applied to shape measurements of various targets with micrometer to nanometer resolution. Since pulse-to-pulse interferometer is utilized, a large object can be measured without losing high accuracy. Scan-less method can be applied to capturing moving target and ultrafast phenomena.

Conference Presentation

Citation Download Citation

Kaoru Minoshima and Takashi Kato "Ultrafast and scan-less three-dimensional imaging using all-optical information conversion with chirped optical frequency comb", Proc. SPIE 12997, Optics and Photonics for Advanced Dimensional Metrology III, 1299702 (18 June 2024); https://doi.org/10.1117/12.3023274

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KEYWORDS

3D image processing

3D scanning

Frequency combs

Ultrafast imaging

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