Multi-Functional Infrared Sensor
Abstract
Multispectral (MS) infrared (IR) imaging has been used in a wide range of laboratory, industrial and military applications. Conventionally, a MS imager termed a MSfocal plane array (FPA) captures the spectral signature of an object through a dispersive element such as a MS filter wheel, each transmitting a specific band.Along with a filter wheel, the imaging lens is used to project or focus the IR light (radiated from objects) onto the pixels in the array. However, drawbacks have beenthe cost and complexity of the associated optical system which requires precise alignment and calibration for accurate detection. Furthermore, the use of narrowbandpass filters can reduce the amount of input radiation which significantly lowers the overall signal-to-noise ratio (SNR) for MS detection. This researchdemonstrated the plasmonic FPA based on perforated gold film (PGF) as a plasmonic coupler. This plasmonic FPA exhibited enhanced SNR as well as MS tunabilitydue to the surface plasmon resonance (SPR). Since the associated imaging lens bends the incidence at various angles, research carried out an initial study toinvestigate the sensitivity of the plasmonic structure against the polar angle. However, the incident light transmitting through the imaging lens indeed bends incombination of both the polar and the azimuth angles. This research performed the full analysis of the angle dependency of PGF against both the polar and theazimuth angles.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 22, 2018
- Accession Number
- AD1068571
Entities
People
- Sang J. Lee
Organizations
- Korea Research Institute of Standards and Science