Share Email Print
cover

Proceedings Paper

Ultra-compact micro-optical system for multispectral imaging
Author(s): Martin Hubold; René Berlich; Christin Gassner; Robert Brüning; Robert Brunner
Format Member Price Non-Member Price
PDF $17.00 $21.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Optical systems for remote sensing commonly employ the principle of multi-/hyperspectral imaging, which is based on the acquisition of a set of two-dimensional images with distinct spectral bands in the ultra-violet, visible and/or infrared domain. Novel applications in the fields of environmental and agricultural monitoring, surveillance and biomedical inspection require miniaturized systems with high spectral and spatial sampling that furthermore enable a single shot image acquisition. However, conventional high resolution multi-spectral imaging solutions rely on bulky setups and depend on scanning techniques. In this work, we propose a multi-spectral imaging concept based on a multi-aperture system approach combined with a slanted linear variable spectral filter in order to overcome these restrictions. In particular, we demonstrate the optical design, fabrication and testing of a highly-compact, cost-effective multispectral imaging system, which exploits state of the art micro-optical manufacturing techniques on wafer level. The developed demonstration system incorporates a conventional full-frame format image sensor, a commercially available linear variable spectral filter and a customized microlens-array. In addition, a tailored baffle array is utilized for preventing optical crosstalk between adjacent optical channels. The setup enables the single-shot acquisition of 66 spectral channels with a linear spectral sampling over an extended wavelength range of 450-850 nm. The compact system with a size of only 60 x 60 x 28 mm3 provides a large field of view of 68° and a spatial sampling of 400x400 pixels per channel. Finally, we demonstrate its capabilities for advanced object classification by utilizing a customized multispectral analysis tool.

Paper Details

Date Published: 22 February 2018
PDF: 8 pages
Proc. SPIE 10545, MOEMS and Miniaturized Systems XVII, 105450V (22 February 2018); doi: 10.1117/12.2295343
Show Author Affiliations
Martin Hubold, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
René Berlich, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Christin Gassner, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Robert Brüning, Ernst-Abbe-Hochschule Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Robert Brunner, Ernst-Abbe-Hochschule Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)


Published in SPIE Proceedings Vol. 10545:
MOEMS and Miniaturized Systems XVII
Wibool Piyawattanametha; Yong-Hwa Park; Hans Zappe, Editor(s)

© SPIE. Terms of Use
Back to Top