Design of linear variable optical filter for hyperspectral imaging. (14th June 2021)

• Record Type: Journal Article
• Authors: Mahendra, Rouchin; Chandra, Ramesh
• Is Part Of: Engineering research express. Volume 3:Number 2(2021)
• Publication Date: 2021-06-14
• Subjects: thin film -- thin film devices -- induced transmission filter -- linear variable optical filter -- hyperspectral -- spectrometry; Engineering -- Periodicals; 620.005
• DOI: 10.1088/2631-8695/ac0776
• Languages: English
• ISSNs: 2631-8695

Abstract

Abstract: The design and simulation of a Linear Variable Optical Filter (LVOF) for the visible and near-infrared (VNIR) 450–900 nm region is described in this paper. The LVOF is designed and simulated using an all-dielectric and metal-dielectric-based induced transmission filter. We compared the design approaches based on all-dielectric and metal-dielectric filters in this paper. The LVOF filter based on the metal-dielectric method reduces design and fabrication complexities while also being cost-effective because no band rejection filters are deemed necessary. The metal-dielectric filter reported in the paper also has minimum spectral transmission of 70% as well as an FWHM of 2%–3% of central maxima.