3D camera based on laser light absorption by atmospheric oxygen at 761 nm

Kääriäinen, Teemu; Seppä, Jeremias

doi:10.1364/oe.510679

Opt. Express

2024

DOI: 10.1364/oe.510679

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3D camera based on laser light absorption by atmospheric oxygen at 761 nm

Teemu Kääriäinen,

Jeremias Seppä

Abstract: A 3D camera based on laser light absorption of atmospheric oxygen at 761 nm is presented. The camera uses a current-tunable single frequency distributed feedback laser for active illumination and a silicon-based image sensor as a receiver. This simple combination enables capturing 3D images with a compact and mass producible set-up. The 3D camera is validated in indoor environments. Distance accuracy of better than 4 cm is demonstrated between 4 m and 10 m distances. Future potential and improvements are discu… Show more

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2024

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Cited by 2 publications

References 14 publications

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4D Vis-SWIR line-scan hyperspectral imaging

Li,

Liu,

2024

Opt. Express

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This paper proposes a four-dimensional (4D) line-scan hyperspectral imaging system to acquire 3D spatial data and hyperspectral images covering from visible to short-wave infrared (Vis-SWIR) wavelength range. The system captures visible and near-infrared (VNIR) and SWIR hyperspectral images using two line-scan sensors, while 3D spatial data is acquired via a fringe projection profilometry subsystem. To align the VNIR and SWIR hyperspectral images, we utilize a line-scan homography method and propose a transformation method to register 3D spatial data with hyperspectral images. The mean reprojection error for hyperspectral image registration is 0.5396 pixels, and the registration of 3D spatial data with hyperspectral images achieves subpixel accuracy. Spatial accuracy is demonstrated with a root mean squared error (RMSE) of 0.1321 mm and a mean absolute error (MAE) of 0.1066 mm by measuring a standard sphere with a 20.0512 mm radius. The spectral resolutions are 11.2 nm in the VNIR range and 5 nm in the SWIR range. Two case studies were conducted: one involving a colorful object with rich features and colors, and another involving a potato before and after sprouting. Results from the measurement of a colorful object demonstrate the proposed system’s registration accuracy and image intensity variation across wavelengths, while the potato study highlights the system’s potential applications in the food industry.

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4D Vis-SWIR line-scan hyperspectral imaging

Li,

Liu,

2024

Opt. Express

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Focus issue introduction: 3D image acquisition and display: technology, perception and applications

Hua,

Stern,

Javidi

et al. 2024

Opt. Express

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This Feature Issue of Optics Express is organized in conjunction with the 2023 Optica conference on 3D Image Acquisition and Display: Technology, Perception and Applications which was held from 14 to 17208 of August as part of the 2023 Imaging and Applied Optics Congress in Boston, Massachusetts, United States. This Feature Issue presents 27 articles which cover the topics and scope of the 2023 3D Image Acquisition and Display conference. This Introduction provides a summary of these published articles that appear in this Feature Issue.

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3D camera based on laser light absorption by atmospheric oxygen at 761 nm

Cited by 2 publications

References 14 publications

4D Vis-SWIR line-scan hyperspectral imaging

4D Vis-SWIR line-scan hyperspectral imaging

Focus issue introduction: 3D image acquisition and display: technology, perception and applications

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