Optical technologies in ESA programmes - Congrex
Optical technologies in ESA programmes - Congrex
Optical technologies in ESA programmes - Congrex
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1.<br />
2.<br />
3.<br />
4.<br />
Euclid - Critical areas<br />
Large area focal planes (VIS & NIR) – state of art + radiation<br />
resistance.<br />
Exceptional requirements on PSF stability and low ellipticity<br />
(0.1 arcsec).<br />
Step and stare sky scann<strong>in</strong>g strategy – duty cycle efficiency<br />
and L<strong>in</strong>e of Sight Stability.<br />
Very high data rate – K band required.<br />
Exist<strong>in</strong>g development activities:<br />
1. CCD radiation test<strong>in</strong>g – Euclid mission dose and test the impact<br />
on Euclid specific performance and ops mode.<br />
2. DMD – prequalification activity.<br />
3. Dichroics and feed for ground stations <strong>in</strong> K-band.<br />
4. FGS CCD – system issue for faster readout than the science<br />
sensors. A fast ADC and readout controller is to be developed<br />
for wide range generic applications<br />
5. Cryo-lens material –Manufactur<strong>in</strong>g of refractive IR components<br />
(optical components and mounts), <strong>in</strong>tegration <strong>in</strong> an optical<br />
cha<strong>in</strong>, and test<strong>in</strong>g to demonstrate the opto-mechanical<br />
performances <strong>in</strong> representative environment (cryogenic<br />
temperatures and vibration levels).<br />
6. Mirror CVD & polish<strong>in</strong>g – needed for high quality optical<br />
performance (15nm rms surface)<br />
Optics <strong>in</strong> <strong>ESA</strong> <strong>programmes</strong> | Roland Meynart | ICSO �ό��� 2010 | 05 October 2010 | Earth Observation | Slide 38
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