Experimental Demonstration of Remote and Compact Imaging Spectrometer Based on Mobile Devices

Abstract

Imaging spectrometers show great potential for environmental and biomedical sensing applications. Selfie sticks, which are tools used to take photographs or videos, have gained global popularity in recent years. Few people have connected these two objects, and few people have researched the application of imaging spectrometers to perform scientific monitoring in point-of-use scenarios. In this paper, we develop a compact imaging spectrometer (35 g in weight, 18 mm in diameter, and 72 mm in length) that can be equipped on a motorized selfie stick to perform remote sensing. We applied this system to perform environmental and facial remote sensing via motorized scanning. The absorption of chlorophyll and hemoglobin can be found in the reflectance spectra, indicating that our system can be used in urban greening monitoring and point-of-care testing. In addition, this compact imaging spectrometer was also easily attached to an underwater dome port and a quad-rotor unmanned aerial vehicle to perform underwater and airborne spectral detection. Our system offers a route toward mobile imaging spectrometers used in daily life.

Rotational hyperspectral scanner and related image reconstruction algorithm

“…Different from the AOTF method mentioned above, a spatial scan spectrometer generally records the spectra of a line in the object plane once a time and then stitching them together 19,20 . For example, in a push-broom hyperspectral spectrometer 21 , there is a linear slit to realize the spatial filtering, which is perpendicular to the sweep direction.…”

Applications of Photonics in Agriculture Sector: A Review

“…As observed from Table 7, hyperspectral imaging involves acquisition over a range of wavelengths while multispectral imaging involved acquisition at fewer selected wavelengths. The robustness of spectral imaging allows its usage in bruise detection [78,162,163], maturity evaluation [164,165,166,167,168], quality evaluation [169,170,171] and disease detection [172,173,174,175,176]. Internal attributes of samples [177,178,179] are easily acquired for analysis purposes as well.…”

“…Based on the LDA, the classification error is reduced from 51% to 19% [166] and achieves detection accuracy above 85% [167]. The ripening in banana fruit is also characterized with a compact imaging system and an UAV from 500 to 700 nm [168]. The detection is based on the reflectance spectrum whereby in ripe banana, the main element is carotenoid which absorbs less light at 650 nm band.…”

Using Mobile– iPhone as New Visible Colour Detector for Determination of Pharmaceutical (Potassium Permanganate)

“…Colorist was also estimated using a smartphone in bio metric analysis, as well as in 14 In recent years, there is an increasing attention in cost optical spectroscopic devices and combine them with mobile phones to leverage the simplicity of and processing data using mobile [1]. Add to more applications that take advantage of the digital cameras in mobile devices became important fic work and daily life [2]. Some researchers have recently used a mobile phone to determined mercury based on accurate image analysis [3].…”