Optical System Design of a Liquid Tunable Fundus Camera Based on Gaussian Brackets Method

Ma, Chen; Dewen, 程德文 Cheng; Qiwei, 王其为 Wang; Chen, 许晨 Xu; Yongtian, 王涌天 Wang

doi:10.3788/aos201434.1122001

Cited by 1 publication

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“…Surface plasmon resonance (SPR) is a phenomenon that occurs when the electrons on a metal surface vibrate in unison in response to incoming light [1][2][3]. When light passes from a denser medium to a less dense one, total internal re ection (TIR) occurs in a speci c critical angle [4]. If a metal lm between the two media interfaces, the P-polarized component of the evanescent wave (EW) generated during total re ection penetrates the metal lm and interacts with its free electrons.…”

Section: Introductionmentioning

confidence: 99%

Dual-core photonic crystal fiber temperature and humidity sensor based on PDMS and PVA

Song,

Jing,

yin

et al. 2024

Preprint

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Temperature and humidity sensors are applied in environmental monitoring, agriculture, food industry, and biochemical detection. To enhance their sensitivity and efficiency, this work presents a temperature and humidity sensor that uses surface plasmon resonance (SPR) and photonic crystal fiber (PCF). The sensor comprises a hexagonal pattern of holes and two planes. On one side of the plane, a gold film coated with polydimethylsiloxane (PDMS) is used for temperature measurement, while on the other side, a gold film with polyvinyl alcohol (PVA) is used for humidity measurement. The finite element method is used to analyze the sensor's sensing characteristics, revealing that its temperature sensitivity ranges from 20℃ to 90℃ at 3.82 nm/℃, while its humidity sensitivity ranges from 20–98% at 5.013 nm/%RH. Overall, this sensor can operate effectively in both temperature and humidity environments, simultaneously measuring both parameters.

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Section: Introductionmentioning

confidence: 99%