[HTML][HTML] Compact methane sensor using an integrating sphere and interband cascade laser at 3313 nm
NM Davis, D Francis, J Hodgkinson… - Sensors and Actuators B …, 2023 - Elsevier
We present a sensor for gas detection utilising an integrating sphere and interband cascade
laser for tunable diode laser absorption spectroscopy (TDLAS). Measurements were made …
laser for tunable diode laser absorption spectroscopy (TDLAS). Measurements were made …
Backscattering properties of topographic targets in the visible, shortwave infrared, and mid-infrared spectral ranges for hard-target lidars
Hard-target lidars rely on the reflectivity and backscattering properties of topographic targets,
which are rather difficult to evaluate, resulting in uncertainties when assessing the …
which are rather difficult to evaluate, resulting in uncertainties when assessing the …
Measuring the absorption coefficient of optical materials with arbitrary shape or distribution within an integrating sphere
JC Martinez Anton, AG Manzanares… - Optics …, 2021 - opg.optica.org
The absorption coefficient of a material is classically determined by measuring the
transmittance of a homogeneous sample contained within flat optical faces and under …
transmittance of a homogeneous sample contained within flat optical faces and under …
Investigating the relation between absorption and gas concentration in gas detection using a diffuse integrating cavity
X Zhou, J Yu, L Wang, Z Zhang - Applied Sciences, 2018 - mdpi.com
Featured Application The current work provides twofold benefits on using a diffuse
integrating cavity as a gas cell:(1) Understand the non-linear relation between absorption …
integrating cavity as a gas cell:(1) Understand the non-linear relation between absorption …
Effective optical path length measurement of integrating cavity using time-resolved spectroscopy and tunable diode laser absorption spectroscopy
X Zhou, H Li, P Hu - The European Physical Journal Applied Physics, 2022 - epjap.epj.org
Integrating cavities are commonly used in trace gas detection and weak absorption
measurement. The effective path length (L) is an important index for evaluating the ability to …
measurement. The effective path length (L) is an important index for evaluating the ability to …
Ratiometric pathlength calibration of integrating sphere-based absorption cells
Chemical sensors based on optical absorption require accurate knowledge of the optical
pathlength of the sample cell. Integrating spheres offer increased pathlengths compared to …
pathlength of the sample cell. Integrating spheres offer increased pathlengths compared to …
In-situ pathlength calibration of integrating spheres used in measurement of absorbance
J Hodgkinson, S Bergin, D Francis… - Optical Sensing and …, 2018 - spiedigitallibrary.org
When used as samples cells for optical absorbance measurements, integrating spheres
offer increased pathlengths compared to single pass cells combined with tolerance to …
offer increased pathlengths compared to single pass cells combined with tolerance to …