Fresnel factory products

Groove pitch of SOG is upside down to prevent contamination from outdoor usages. SOG Fresnel lenses are 50~ 100% thicker than other Fresnel lenses. Also Groove pitch is wider for high efficiency. Also we design to use more 3mm Optical PMMA for loner life time and to have 0.5 ~ 1.0mm groove pitch for higher solar concentration. (If groove pitch is density, then quality of image that is maginifed is clearer.If groove pitch is width, then efficince of concentration of light is higher.)

Groove pitch of SOG is upside down to prevent contamination from outdoor usages. SOG Fresnel lenses are 50~ 100% thicker than other Fresnel lenses. Also Groove pitch is wider for high efficiency. Also we design to use more 3mm Optical PMMA for loner life time and to have 0.5 ~ 1.0mm groove pitch for higher solar concentration. (If groove pitch is density, then quality of image that is maginifed is clearer.If groove pitch is width, then efficince of concentration of light is higher.)