&lt;title&gt;Imaging spectrometer for process industry applications&lt;/title&gt;

Herrala, Esko; Okkonen, Jukka; Hyvärinen, Timo; Aikio, Mauri; Lammasniemi, Jorma

doi:10.1117/12.194344

Cited by 32 publications

(13 citation statements)

References 4 publications

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“…Many different techniques for spectral imaging have been developed over the years. Whiskbroom [5], pushbroom [6], and tunable filter [7] imagers are all conceptually simple spectral imager designs. These instruments capture a one-or two-dimensional subset of a data cube and thus require temporal scanning of the remaining dimension(s) to obtain a complete data cube.…”

Section: Introductionmentioning

confidence: 99%

Single disperser design for coded aperture snapshot spectral imaging

Wagadarikar¹,

John²,

Willett³

et al. 2008

Appl. Opt.

841

473

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We present a single disperser spectral imager that exploits recent theoretical work in the area of compressed sensing to achieve snapshot spectral imaging. An experimental prototype is used to capture the spatiospectral information of a scene that consists of two balls illuminated by different light sources. An iterative algorithm is used to reconstruct the data cube. The average spectral resolution is 3.6 nm per spectral channel. The accuracy of the instrument is demonstrated by comparison of the spectra acquired with the proposed system with the spectra acquired by a nonimaging reference spectrometer.

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Section: Introductionmentioning

confidence: 99%

Single disperser design for coded aperture snapshot spectral imaging

Wagadarikar¹,

John²,

Willett³

et al. 2008

Appl. Opt.

841

473

View full text Add to dashboard Cite

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“…La óptica externa forma imagen de una escena sobre la rendija de entrada del sistema dispersivo que separa el espectro de la luz proveniente de dicha rendija en ángulos diferentes en función de su longitud de onda en una dirección perpendicular a la misma y forma imagen sobre la unidad de detención. Entre algunos de los sistemas estudiados y utilizados como unidad dispersiva en un sensor hiperespectral tipo pushbroom, se pueden destacar el sistema Offner [13][14][15][16], el sistema Dyson [17,18], los sistemas PGP (Prism-Grating-Prism) [19,20] o modificaciones del sistema Czerny-Turner [21,22]. Fig.2.…”

Section: A Espectrómetros De Imagen Dispersivos Tipo Pushbroom: Siunclassified

Offner imaging spectrometers

Carballo¹,

Núñez²

2017

Opt. Pura Apl.

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ABSTRACT:A hyperspectral sensor or imaging spectrometer is a device that collects spatial and spectral information in hundreds of contiguous and closely spectral bands. Hyperspectral imagers have many applications in several areas such as agriculture, geology, oceanography, forestry, medicine, colorimetry, security, military and others. Most of the existing hyperspectral systems were developed considering satellite or high altitude flying aircrafts applications. However, the specific development of these technologies allows their use in many other less expensive applications. In this context, the work presented in this thesis allows building high quality and low cost Offner imaging spectrometers. Rapid and efficient methods were used for the design, assembly and characterization of this type of spectrometers. Two laboratory setups developed from analytical model-based designs have been assembled showing high spectral and spatial resolutions and low distortions without specific aberrations corrected gratings nor non-spherical elements.Key words: Imaging spectrometry, Offner spectrometer, Optical design. RESUMEN:Un sensor hiperespectral o espectrómetro de imagen es un dispositivo que recoge información espacial y espectral en cientos de bandas contiguas y espectralmente estrechas. Los sensores hiperespectrales tienen muchas aplicaciones en diversas áreas como agricultura, geología, oceanografía, silvicultura, medicina, colorimetría, seguridad o aplicaciones militares entre otras. La mayor parte de los equipos hiperespectrales existentes fueron construidos pensando en aplicaciones desde satélites y/o aviones sobrevolando a gran altitud. No obstante, el desarrollo específico de estas tecnologías permite su uso en muchas otras aplicaciones con menor presupuesto. En este contexto, el trabajo presentado en esta de tesis doctoral permite la construcción de espectrómetros de imágenes Offner de alta calidad y bajo coste mediante métodos rápidos y eficientes de diseño, montaje y caracterización. Se han realizado dos montajes de laboratorio a partir de diseños basados en modelos analíticos mostrando unas altas resoluciones espectrales y espaciales y bajas distorsiones sin el uso de redes de difracción corregidas en aberraciones ni de elementos asféricos.Palabras clave: Espectrometría de imagen, Espectrómetro Offner, Diseño óptico. REFERENCES AND LINKS / REFERENCIAS Y ENLACES[1] A. F. H. Goetz, "Three decades of hyperspectral remote sensing of the earth: A personal view," Remote Sens. Environ., 113, S5-S16 (2009).

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“…The reflectance spectrum of points on a narrow line is measured (Herrala et al, 1994). An image of one line will be referred to as image line.…”

Section: Choice Of Sensorsmentioning

confidence: 99%