Abstract

While near-infrared reflectance instruments are best known for their ability to rapidly analyze powdered solid samples, some manufacturers have provided the means to measure liquid samples as well. Unfortunately, liquid-analysis accessories are often cumbersome and expensive. A typical accessory requires a relatively large volume of the sample (on the order of milliliters) and complex purge/fill and wash cycles to prevent clogging. If clogging does occur, cleaning can be difficult. The thermostatically controlled heating cycle only adds to a total analysis time already extended by the other operations.

An Infrared Gas Microcell

George R. Bird
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In-line liquid-crystal microcell polarimeter for high-speed polarization analysis

Bharat R. Acharya, C. K. Madsen, K. W. Baldwin, R. A. MacHarrie, J. A. Rogers, L. Möller, C. C. Huang, and R. Pindak
Opt. Lett. 28(13) 1096-1098 (2003)

Near-infrared reflecting/transmitting smart windows based on chiral nematic liquid crystals with enhanced electrically switching performance

Mehdi Jafarimoghadam, Mohammad Mohammadimasoudi, Mohsen Zali, and Kaveh Yazdi
Appl. Opt. 63(10) 2651-2657 (2024)

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Near-infrared light directed reflection in a cholesteric liquid crystal

H. B. Lu, J. Xing, C. Wei, J. Q. Sha, G. B Zhang, G. Q. Lv, J. Zhu, and L. Z. Qiu
Opt. Mater. Express 7(11) 4163-4170 (2017)