Q. What method are the lenses manufactured by?
A. Most of our products are manufactured by Heat compression molding. Please contact us for more details.
Q. What does “Aperture” of Fresnel lens mean in specification?
A.We carry two types of Fresnel lenses: one type in which the Fresnel grooves do not extend to the corners (which are flat), and one type in which the Fresnel grooves extend to the corners of the lens.
For example, the CF50-B has a size of 100mm square and an aperture of 100mm. In this case, the size and aperture are the same because the corners have flat areas.
In contrast, the CF150-B has a size of 200mm but an aperture of 283mm. This is because the grooves cover the full surface of the lens.