Construction and Evaluation of a Visible Spectrometer Using Digital Micromirror Spatial Light Modulation

Wagner, Eugene P.; Smith, B. W.; Madden, Sean; Winefordner, J. D.; Mignardi, Mike

doi:10.1366/0003702953965731

Cited by 43 publications

(26 citation statements)

References 5 publications

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“…In contrast, several previous studies have shown that chemometric techniques could be incorporated directly into the optical measurement process by using either static optical interference filters, 7 or tunable liquid crystal [8][9][10] or micromirror [11][12][13][14][15] based multivariate optical elements built into the spectrometer hardware. The general principle of these filters is to combine photons of various frequencies in a prescribed way in order to facilitate the estimation of a quantity of interest.…”

Section: -6mentioning

confidence: 99%

Optimal filters for high-speed compressive detection in spectroscopy

Buzzard

Lucier

2013

Computational Imaging XI

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Recent advances allow for the construction of filters with precisely defined frequency response for use in Raman chemical spectroscopy. In this paper we give a probabilistic interpretation of the output of such filters and use this to give an algorithm to design optimal filters to minimize the mean squared error in the estimated photon emission rates for multiple spectra. Experiments using these filters demonstrate that detecting as few as ∼10 Raman scattered photons in as little time as ∼30 µs can be sufficient to positively distinguish chemical species. This speed should allow "chemical imaging" of samples.

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Section: -6mentioning

confidence: 99%

Optimal filters for high-speed compressive detection in spectroscopy

Buzzard

Lucier

2013

Computational Imaging XI

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“…Early designs for using DMD arrays as a spectral filter were single-pixel applications for fiber communications 13,14 and spectrometry. 15 More recent designs have expanded this capability to 1-D pixel arrays for pushbroom imaging applications. 16,17 In each case, the concept is straightforward: light emerging from each source is collimated, dispersed by a grating or prism, and re-imaged on a 1-D array of micro-mirrors (2-D for imaging), forming a spectrally dispersed image of the source.…”

Section: Dmd-based Programmable Spectral Filtermentioning

confidence: 99%

Adaptive hyperspectral imaging with a MEMS-based full-frame programmable spectral filter

Graff

Love

2014

SPIE Proceedings

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Rapidly programmable spatial light modulation devices based on MEMS technology have opened an exciting new arena in spectral imaging: rapidly reprogrammable, high spectral resolution, multi-band spectral filters that enable hyperspectral processing directly in the optical hardware of an imaging sensor. Implemented as a multiplexing spectral selector, a digital micro-mirror device (DMD) can independently choose or reject dozens or hundreds of spectral bands and present them simultaneously to an imaging sensor, forming a complete 2D image. The result is a high-speed, highresolution, programmable spectral filter that gives the user complete control over the spectral content of the image formed at the sensor. This technology enables a wide variety of rapidly reprogrammable operational capabilities within the same sensor including broadband, color, false color, multispectral, hyperspectral and target specific, matched filter imaging. Of particular interest is the ability to implement target-specific hyperspectral matched filters directly into the optical train of the sensor, producing an image highlighting a target within a spectrally cluttered scene in real time without further processing. By performing the hyperspectral image processing at the sensor, such a system can operate with high performance, greatly reduced data volume, and at a fraction of the cost of traditional push broom hyperspectral instruments. Examples of color, false color and target-specific matched-filter images recorded with our visible-spectrum prototype will be displayed, and extensions to other spectral regions will be discussed.

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“… DMD as the spectral filter DMD have already been viewed as a competitive device for spectral filter and multiplexing. Early designs for using DMD arrays as multiplexing spectral selectors were single pixel applications for fiber communications [14][15] and spectrometry [16] . Light from a fiber was collimated, dispersed by a grating or prism and focused onto a one-dimensional array of micro-mirrors.…”

Section: Dmd Chipmentioning

confidence: 99%

A DMD-based hyperspectral imaging system using compressive sensing method

2014

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Hyperspectral Imaging Systems (HIS) are widely applied in many fields. However, in the traditional design of HIS, it is much time-consuming to acquire an integrated hyperspectral image. Compressive sensing is an efficient method to process sparse data, and a single-pixel camera which used the digital micromirror device (DMD) for accomplishing the CS algorithms had been developed. Nowadays, DMD achieved great development. The size of mirror array is increasing while switch speed of a single mirror becomes very fast. Consequently, researchers make efforts to design a HIS using CS method. CS method is a method to scale down the spatial information but the hyperspectral datacubes are still huge because of the thousands of bands. In this paper, we design a DMD-based spectrometer architecture using the method of compressed sensing principle, combined with DMD's spectral filter characteristics. In the new architecture, there are two DMDs. One is used for implementing the CS pattern, the other for filtering the bands. It has spectral simply adjustable advantages. With this new technology, we can reduce the amount of information which needs to be transmitted and processed in both spatial and spectral domain. We also present some simulation results of implementation procedures.

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Construction and Evaluation of a Visible Spectrometer Using Digital Micromirror Spatial Light Modulation

Cited by 43 publications

References 5 publications

Optimal filters for high-speed compressive detection in spectroscopy

Optimal filters for high-speed compressive detection in spectroscopy

Adaptive hyperspectral imaging with a MEMS-based full-frame programmable spectral filter

A DMD-based hyperspectral imaging system using compressive sensing method

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