Imaging and dispersion analysis of a diffractive optical element for infrared sensors
| Autor: | Rainer Riesenberg, Alexej Grjasnow, Christian Graulig |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Point spread function
Physics business.industry Detector Physics::Optics Photometer Grating Diffraction efficiency Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Ray tracing (physics) Optics law Dispersion (optics) Electrical and Electronic Engineering Spectral resolution business |
| Zdroj: | Optik. 124:1777-1782 |
| ISSN: | 0030-4026 |
| DOI: | 10.1016/j.ijleo.2012.05.020 |
| Popis: | Diffractive optical elements (DOEs) like diffractive lenses are used in infrared sensors to combine spectral filtering and focusing in a single optical element. Spectral resolution, dispersion, and imaging properties depend on the geometry of the setup. These dependencies are analysed by ray tracing for different arrangements, using the local grating period of the DOE. An optimized setup for infrared gas measurements is presented that does not rely on filters, consisting only of an emitter, a detector and the DOE. Additionally the system's point spread function is taken into account. It is calculated by an efficient implementation of the Rayleigh–Sommerfeld wavefield propagation technique. A prototype, based on a two-level DOE, is presented and measurements confirm the simulation results. |
| Databáze: | OpenAIRE |
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