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Articles

In the past 20 years, spectrometers have shrunk dramatically in size, and this shrinking has been achieved with only modest performance reductions in sampling versatility, spectral range, spectral resolution, and signal-to-noise.

Spectrometers in Wonderland: Shrinking, Shrinking, Shrinking

A PLS model was built with optimized wavelength variables generated by a competitive adaptive reweighted sampling (CARS) algorithm, enabling the use of handheld NIR spectroscopy to rapidly detect peroxide values in oil.

Rapid Determination of the Peroxide Value of Edible Oil by Handheld NIR Spectroscopy in Combination with Wavelength Variables Selection and PLS Calibration

A novel approach to NIR spectral sensing, using a miniaturized fully-integrated multipixel array of resonant-cavity-enhanced InGaAs photodetectors,
enables sensors with a millimeter-scale footprint and wafer-scale fabrication.
This multipixel sensor does not measure the full spectrum, but rather a limited number of spectral regions with limited resolution (50–100 nm).

Spectral Sensing Using a Handheld NIR Module Based on a Fully Integrated Sensor Chip

Xi Wang is with the State Key Laboratory Base of Novel Function Materials and Preparation Science at the School of Material Sciences and Chemical Engineering of Ningbo University, in Ningbo, Zhejiang, China.

Zongyue Chen is with the State Key Laboratory Base of Novel Function Materials and Preparation Science at the School of Material Sciences and Chemical Engineering of Ningbo University, in Ningbo, Zhejiang, China.

Jianyu Zhang is with the State Key Laboratory Base of Novel Function Materials and Preparation Science at the School of Material Sciences and Chemical Engineering of Ningbo University, in Ningbo, Zhejiang, China.

Shangke Pan is with the State Key Laboratory Base of Novel Function Materials and Preparation Science at the School of Material Sciences and Chemical Engineering of Ningbo University, in Ningbo, Zhejiang, China.

Jianguo Pan is with the Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province, in Zhejiang, China. 

The possible energy transfer modes between Yb3+ and Tm3+ ions were analyzed.

Growth and Temperature-Dependent Spectral Properties of Yb3+, Tm3+ Co-Doped NaY(MoO4)2 Crystal

Spectroscopy offers a range of available techniques that can be differentiated by the use or omission of reference spectra. 

Valuable Techniques for Repeatable Absorbance Measurements

Qingbo Li is with the School of Instrumentation and Optoelectronic Engineering and the Precision Opto-Mechatronics Technology Key Laboratory of Education Ministry at Beihang University, in Beijing, China. 

Ruiguang Zhao is with the School of Instrumentation and Optoelectronic Engineering and the Precision Opto-Mechatronics Technology Key Laboratory of Education Ministry at Beihang University, in Beijing, China. 

Xingjin Miao is with the School of Instrumentation and Optoelectronic Engineering and the Precision Opto-Mechatronics Technology Key Laboratory of Education Ministry at Beihang University, in Beijing, China. 

A model based on similarity regularized nonnegative matrix factorization (SRNMF) can be used in space exploration and national security applications to exploit the spatial information in an image of a space target.

Simulation of an Algorithm for Space Target Materials Identification Based on vis-NIR Hyperspectral Data

In this second part of this four-part series on spectroscopy instrument components, we take a closer look at optical components or subassemblies used for vibrational spectroscopy instruments.

A Survey of Basic Instrument Components Used in Spectroscopy, Part 2: Optical Materials and Designs

Portable NIR spectroscopy, combined with discrimination analysis (PLS-DA), can be used to rapidly and accurately identify five very similar wood species of the Cinnamomum genus.

Identification of Five Similar Cinnamomum Wood Species Using Portable Near-Infrared Spectroscopy

We propose a theoretical basis using vis-NIR spectroscopy for the development of an online nondestructive testing system for the quality of Nanguo pear fruit.

Study of Nondestructive Testing of Nanguo Pear Quality Using Vis-NIR Spectroscopy

Our annual review of new products for atomic and molecular spectroscopy, including details by category and highlights of overarching trends.

Near Infrared (NIR) Spectroscopy