Linear Variable Filters for Biomedical and Hyperspectral Imaging Applications

Fabricius, H.; Pust, Oliver

doi:10.1364/biomed.2014.bs3a.42

Cited by 3 publications

(2 citation statements)

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“…Examples of spatio-spectral scanning systems are Imec line-scan [9] and Snapscan camera systems [10]. An example of a tunable filter system is the hyperspectral camera concept described in [11], where a Continuous Variable Filter (CVF), a.k.a Linear Variable Filter (LVF) of Delta Film [12] is used. The 18 bands in the VNIR range are acquired with the translational movement of the UAV and used to reconstruct the 3D structure in the scene.…”

Section: Introductionmentioning

confidence: 99%

Compact high-speed snapshot multispectral imagers in the VIS/NIR (460 to 960 nm) and SWIR range (1.1 to 1.65 nm) and its potential in a diverse range of applications

Blanch-Perez-del-Notario¹,

Geelen²,

Li³

et al. 2023

Hyperspectral Imaging and Applications II

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This paper presents the latest advances on Imec snapshot multispectral imagers based on either 3x3, 4x4 and 5x5 mosaic filter patterning on industry ready VIS/NIR and SWIR detectors. The mosaic patterns are implemented by means of high-transmission Fabry-Pérot interferometers processed using thin-film technology. Our snapshot multispectral imagers offer a spatial resolution of 640x480 pixels (SWIR) and 2048x1088 (VIS/NIR) down sampled according to the mosaic pattern to acquire data in 9 (3x3), 16 (4x4) of 25 (5x5) spectral bands respectively. To achieve imaging at the native spatial resolution of the sensor, super resolution methods are available post-acquisition. Moreover, our compact USB-3 cameras of 260 gr (SWIR) and 27 gr (VNIR), without lens, reach an acquisition speed of up to 120 multispectral cubes/second and are therefore suitable for dynamic applications, high-speed inspection such as a conveyor belt or UAV inspection. The potential for snapshot cameras in a wide range of applications is showcased in this paper. We first show how applications on industrial quality inspection (chocolate gloss estimation) and precision agriculture (plant disease detection) achieve good discrimination potential in the VNIR range. Specifically, UAV inspection benefits from our compact camera size, low weight, and video capabilities. We then demonstrate the potential for plastic and textile recycling in the SWIR range and the benefit brought by both VNIR and SWIR ranges for people tracking under low visibility conditions. Finally, an application involving the joint use of a microscope and a multispectral camera system is presented for particle contamination exposure assessment. The suitable range is in this case application dependent.

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Section: Introductionmentioning

confidence: 99%

Compact high-speed snapshot multispectral imagers in the VIS/NIR (460 to 960 nm) and SWIR range (1.1 to 1.65 nm) and its potential in a diverse range of applications

Blanch-Perez-del-Notario¹,

Geelen²,

Li³

et al. 2023

Hyperspectral Imaging and Applications II

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“…Outside the dairy industry, HSI has been used in a wide array of applications such as remote sensing (Goetz, 2009), airborne hyperspectral surveys (Giardino et al, 2015), astronomy (Hege et al, 2004), agriculture (Lelong et al, 1998), biomedicine (Fabricius and Pust, 2014), and mineralogy (Kruse, 2012), as well as non-dairy foods (Gowen et al, 2007).…”

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confidence: 99%

An evaluation of hyperspectral imaging for characterising milk powders

Munir

Wilson

et al. 2018

Journal of Food Engineering

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Advances in hyperspectral remote sensing I: The visible Fourier transform hyperspectral imager

Rafert

2015

J. Spectral Imaging

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We discuss early hyperspectral research and development activities during the 1990s that led to the deployment of aircraft and satellite payloads whose heritage was based on the use of visible, spatially modulated, imaging Fourier transform spectrometers, beginning with early experiments at the Florida Institute of Technology, through successful launch and deployment of the Visible Fourier Transform Hyperspectral Imager on MightySat II.1 on 19 July 2000. In addition to a brief chronological overview, we also discuss several of the most interesting optical engineering challenges that were addressed over this timeframe, present some as-yet un-exploited features of field-widened (slit-less) SMIFTS instruments, and present some images from ground-based, aircraft-based and satellite-based instruments that helped provide the impetus for the proliferation and development of entire new families of instruments and countless new applications for hyperspectral imaging.

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Linear Variable Filters for Biomedical and Hyperspectral Imaging Applications

Abstract: Linear Variable Filters recently reached quality levels that make them applicable for demanding biomedical and hyperspectral imaging applications that often rely on fluorescence techniques. LVF offer tuneability over a wide wavelength range with excellent blocking.

Cited by 3 publications

References 0 publications

Compact high-speed snapshot multispectral imagers in the VIS/NIR (460 to 960 nm) and SWIR range (1.1 to 1.65 nm) and its potential in a diverse range of applications

Compact high-speed snapshot multispectral imagers in the VIS/NIR (460 to 960 nm) and SWIR range (1.1 to 1.65 nm) and its potential in a diverse range of applications

An evaluation of hyperspectral imaging for characterising milk powders

Advances in hyperspectral remote sensing I: The visible Fourier transform hyperspectral imager

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