An array of fabry-perot optical-channels for biological fluids analysis

• Author(s): Minas, Graça ; Ribeiro, J. C. ; Martins, Júlio S. ; Wolffenbuttel, R. F. ; Correia, J. H.
• Date: 2004
• Persistent ID: http://hdl.handle.net/1822/1339
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Biosystem; Optical filter array; Fabry-Perot
• Document Type: Article
• Language: English

Description

This paper describes a biosystem (biological system) used to measure the concentration of biochemical substances in urine, serum, plasma or cerebrospinal fluid. Rather than just one channel, it comprises 16 optical-channels that enable the measurement of the concentration of 16 different biochemical substances. An array of 16 optical filters based on Fabry-Perot thin-films optical resonators has been designed. Each optical-channel is sensitive in a single wavelength with a full-width-half-maximum (FWHM) of 7 nm. The filter fabrication requires only four masks, used with different etch time. A commercially available band-pass optical filter with a band-pass wavelength in 450–650 nm is used. The biosystem requires only a white light source for illumination due the use of selective optical filters.