Robust reflective pupil slicing technology

Meade, Jeffrey T.; Behr, Bradford B.; Cenko, Andrew T.; Hajian, Arsen R.

doi:10.1117/12.2056949

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…This instrument benefits from a high throughput virtual slit (HTVS) technology that permits faster measurements. 62 The experimental setup was similar to that used previously, with the Tornado instrument in place of the THz Raman (Fig. S16, ESI ‡).…”

Section: Kinetic Insight Determined Via Non-invasive Raman Spectroscopymentioning

confidence: 99%

Non-invasive monitoring of the growth of metal–organic frameworks (MOFs) via Raman spectroscopy

Chong

Parrott

Ashworth

et al. 2023

Phys. Chem. Chem. Phys.

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Section: Kinetic Insight Determined Via Non-invasive Raman Spectroscopymentioning

confidence: 99%

Non-invasive monitoring of the growth of metal–organic frameworks (MOFs) via Raman spectroscopy

Chong

Parrott

Ashworth

et al. 2023

Phys. Chem. Chem. Phys.

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“…A scientific CCD camera coupled to a compact OEM spectrometer with an improved lightthroughput using an optical slicer as entrance slit is used for wavelength selective detection. [25,26] After discussing the portable sensor system, on-site SERDS measurements on soil will be presented for the first time to the best of our knowledge. These pilot investigations are performed on an experimental plot at the research site Marquardt in northeast Germany.…”

Section: Introductionmentioning

confidence: 99%

Portable shifted excitation Raman difference spectroscopy for on‐site soil analysis

Maiwald

Sowoidnich

Sumpf

2022

J Raman Spectroscopy

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On-site soil analysis in the framework of precision agriculture is gaining significant importance to achieve improved crop productivity, increased soil health and reduced fertilizer application. In situ sensing techniques can provide the information required for decision support systems immediately on the field, for example, to control fertilization and liming. Shifted excitation Raman difference spectroscopy (SERDS) pilot investigations for on-site soil analysis are presented using a portable SERDS sensor system specifically developed for infield studies. The SERDS sensor includes a dual-wavelength diode laser at 785 nm integrated in an in-house realized turnkey laser system and an optical power of 36 mW at the sample was chosen for our experiments. Outdoor preinvestigations with the device and polystyrene as test sample show the capability of SERDS for qualitative and quantitative analysis under changing daylight conditions. On-site soil analysis is carried out and SERDS extracts Raman signals from disturbing background interference with a 15-fold improvement of the signal-to-background-noise ratio. Beside others, closely neighboured Raman signals of calcite and dolomite are identified and even mixtures of both soil carbonates are discriminated using SERDS. The number of accumulations for generating an averaged SERDS spectrum of soil with a sufficient signal stability and signal-to-background-noise ratio is evaluated to optimize the overall exposure time for such in situ experiments. The presented results demonstrate the large capability of the developed portable SERDS sensor system for on-site soil investigations as promising tool for precision agriculture.

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“…An asymmetric beam expander then changes the width of the stack to match the original width of the original full aperture. While such optical slicing methods do improve both spectral resolution and throughput, they come at the expense of the introduction of additional analog optical elements that increase not only the complexity of the spectrometer, but also increases the cost of the spectrometer as well [15]. These optical components (e.g., lenses, reflective surfaces, etc.)…”

mentioning

confidence: 99%

Resolution- and throughput-enhanced spectroscopy using a high-throughput computational slit

Kazemzadeh¹,

Wong²

2016

Opt. Lett.

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There exists a fundamental trade-off between the spectral resolution and the efficiency or throughput for all optical spectrometers. The primary factors affecting the spectral resolution and throughput of an optical spectrometer are the size of the entrance aperture and the optical power of the focusing element. So far, the collective optimization of the above mentioned has proven difficult. Here, we introduce the concept of high-throughput computational slits (HTCS), a numerical technique for improving both the effective spectral resolution and efficiency of a spectrometer. The proposed HTCS approach was experimentally validated using an optical spectrometer configured with a 200 μm entrance aperture, test, and a 50 μm entrance aperture control, demonstrating improvements in the spectral resolution of the spectrum by ∼50% over the control spectral resolution and improvements in efficiency of >2 times over the efficiency of the largest entrance aperture used in this Letter, while producing highly accurate spectra.

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Robust reflective pupil slicing technology

Cited by 3 publications

References 6 publications

Non-invasive monitoring of the growth of metal–organic frameworks (MOFs) via Raman spectroscopy

Non-invasive monitoring of the growth of metal–organic frameworks (MOFs) via Raman spectroscopy

Portable shifted excitation Raman difference spectroscopy for on‐site soil analysis

Resolution- and throughput-enhanced spectroscopy using a high-throughput computational slit

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