Variable optical filters for earth-observation imaging minispectrometers

A. Piegari, J. Bulir, A. Krasilnikova, M. Dami, B. Harnisch

Research output: Contribution to conferencePaper

Abstract

Small-dimension, low-mass spectrometers are useful for both Earth observation and planetary missions. A very compact multi-spectral mini-spectrometer that contains no moving parts, can be constructed combining a graded-thickness filter, having a spatially variable narrow-band transmission, to a CCD array detector. The peak wavelength of the transmission filter is moving along one direction of the filter surface, such that each line of a two-dimensional array detector, equipped with this filter, will detect radiation in a different pass band. The spectrum of interest for image spectrometry of the Earth surface is very wide, 400-1000nm. This requirement along with the need of a very small dimension, makes this filter very difficult to manufacture. Preliminary results on metal-dielectric wedge filters, with a gradient of the transmission peak wavelength equal to 60nm/mm, are reported.
Original languageEnglish
DOIs
Publication statusPublished - 2017
Event6th International Conference on Space Optics, ICSO 2006 - Noordwijk, Netherlands
Duration: 1 Jan 2017 → …

Conference

Conference6th International Conference on Space Optics, ICSO 2006
CountryNetherlands
CityNoordwijk
Period1/1/17 → …

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Piegari, A., Bulir, J., Krasilnikova, A., Dami, M., & Harnisch, B. (2017). Variable optical filters for earth-observation imaging minispectrometers. Paper presented at 6th International Conference on Space Optics, ICSO 2006, Noordwijk, Netherlands. https://doi.org/10.1117/12.2308083