Parabolic reflectors for solar applications are nice ... After you´re done with this, you end up with a nice flat mirror. Here´s where the vacuum is needed to force the film into parabolic ...

Parabolic reflectors for solar applications are nice ... After you´re done with this, you end up with a nice flat mirror. Here´s where the vacuum is needed to force the film into parabolic ...

This focussing effect is very strong with WAVELENGTHs less than the aperture of the reflector, making it particularly suitable for recording high frequency sounds such as birdsong. Schematic diagram ...

Researchers at Morocco's Sidi Mohamed Ben Abdellah University (USMBA) have designed a bifacial crystalline PV module based on a reflector ... be reflected by the parabolic mirrors on the cell ...