Integration of linear variable filters on CMOS for compact emission and absorption sensing

John A. Carlson, Yuhang Wan, Benjamin A. Kesler, Wang Peng, Saoud A. Al-Mulla, Patrick Su, John M. Dallesasse, Brian T. Cunningham

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A compact optical spectrometer approach is presented that integrates multiple linear variable filters (LVFs) onto a CMOS imaging sensor for measurement of liquid-phase fluorescence and absorption that provides a 3.77-6.08 nm spectral resolution over a 400-1050 nm wavelength range. For fluorescence detection, we demonstrate detection limits of 0.28 nM for Quantum Dot emitters and 32 ng/mL for near-infrared fluorescent dyes. For colorimetric absorption detection, the system provides detection limits comparable to those obtained with a conventional spectrometer and a laboratory optical spectrum analyzer (OSA). As an exemplary application, we utilize the instrument for quantification of the concentration of chlorine in water.

Original languageEnglish (US)
Title of host publicationIEEE Sensors, SENSORS 2016 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479982875
StatePublished - Jan 5 2016
Event15th IEEE Sensors Conference, SENSORS 2016 - Orlando, United States
Duration: Oct 30 2016Nov 2 2016

Publication series

NameProceedings of IEEE Sensors
ISSN (Print)1930-0395
ISSN (Electronic)2168-9229


Other15th IEEE Sensors Conference, SENSORS 2016
Country/TerritoryUnited States


  • linear variable filter
  • optical spectrometry

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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