... , a conventional glass lens would be 200mm thick at the edge, weigh over 50kgs and cost thousand of ... suitable for PROJECTOR,PROJECTOR,EPIDIASCOPE and ,also suitable for Solar energy collector system, start a fire under sunlight, hot ... water heater, solar furnace, stage light,LCD projector,AV projector,HOME cinema ... high quality PMMA Standard Fresnel Lens FOR SOLAR ENERGY