27 September 2008 MICROCARD: a micro-camera based on a circular diffraction grating for MWIR and LWIR imagery
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Circular diffraction gratings (also called diffractive axicons) are optical components producing achromatic non-diffracting beams. They thus produce a focal line rather than a focal point for classical lenses. We have recently shown in the visible spectral range that this property can be used to design a simple imaging system with a long depth of focus and a linear variable zoom by using and translating a diffractive axicon as the only component. We have then adapted this principle for the mid-wavelength infrared (MWIR) spectral range and the long-wavelength infrared (LWIR) spectral range. A LWIR low-cost micro-camera, called MICROCARD, has been designed and realized. First images from this camera will be shown. Moreover a way to design a compact MWIR micro-camera with moveable parts integrated directly into the cryostat will be presented.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guillaume Druart, Guillaume Druart, Nicolas Guérineau, Nicolas Guérineau, Michel Tauvy, Michel Tauvy, Sylvain Rommeluère, Sylvain Rommeluère, Jérôme Primot, Jérôme Primot, Joël Deschamps, Joël Deschamps, Manuel Fendler, Manuel Fendler, Jean-Charles Cigna, Jean-Charles Cigna, Jean Taboury, Jean Taboury, } "MICROCARD: a micro-camera based on a circular diffraction grating for MWIR and LWIR imagery", Proc. SPIE 7100, Optical Design and Engineering III, 71001N (27 September 2008); doi: 10.1117/12.797446; https://doi.org/10.1117/12.797446


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